diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-02-16 11:15:19 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-02-16 11:15:19 -0800 |
| commit | 2228d9cf7a562d1b0ca86bd529f6acb94f4bb80f (patch) | |
| tree | 9a11ea72e8f20a422f463faa31a10a8d3d398cbe | |
| parent | 4bfa4a54b02029b3996b9f9021f5f745c71e9064 (diff) | |
| parent | b2c87f5e98cd88095dbc6802197526703d5e4e48 (diff) | |
Merge tag 'leds-next-6.20' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/leds
Pull LED updates from Lee Jones:
"New Support & Features:
- Add support for the TI LP5812 4x3 matrix RGB LED driver, including
autonomous animation engine control and extensive scan multiplexing
modes
- Add a new driver for the ams Osram AS3668 4-channel I2C LED
controller
- Extend the is31fl32xx driver to support the is31fl3293 variant,
which features 3 channels and 12-bit PWM resolution
Improvements & Fixes:
- Prevent the ExpressWire KTD2801 chip from entering an undefined
state by disabling interrupts during time-sensitive communication
- Ensure the Qualcomm LPG driver detects hardware write failures by
checking the return value of regmap_bulk_write() during LUT
programming
- Fix kernel-doc warnings in the lm3692x driver by documenting
missing struct members and standardizing the comment style
- Update the ExpressWire library to use fsleep() and unexport
internal-only functions
- Improve the is31fl32xx driver by reordering code to eliminate
unnecessary forward declarations
Cleanups & Refactoring:
- Simplify the LP55XX common LED driver by utilizing the
for_each_available_child_of_node_scoped() macro for more concise
node iteration
Device Tree Bindings Updates:
- Add new YAML bindings for the TI LP5860 and LP5812 LED controllers,
and the ams Osram AS3668
- Convert the TI LM3697 white LED driver binding to DT schema format
- Allow multicolor LED nodes to be named with numeric suffixes (e.g.,
multi-led-0) to handle multiple instances without unit addresses
- Document support for the PMH0101 variant in the Qualcomm LPG PWM
and SPMI Flash LED bindings
- Add the issi,is31fl3293 compatible string to the is31fl32xx
binding"
* tag 'leds-next-6.20' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/leds:
dt-bindings: leds: Convert ti,lm3697 to DT schema
leds: as3668: Driver for the ams Osram 4-channel i2c LED driver
dt-bindings: leds: Add new as3668 support
docs: leds: Document TI LP5812 LED driver
leds: Add basic support for TI/National Semiconductor LP5812 LED Driver
leds: qcom-lpg: Check the return value of regmap_bulk_write()
dt-bindings: leds: qcom,spmi-flash-led: Add PMH0101 compatible
dt-bindings: leds: leds-qcom-lpg: Add support for PMH0101 PWM
dt-bindings: leds: Allow differently named multicolor LEDs
leds: lp55xx: Simplify with scoped for each OF child loop
dt-bindings: leds: add TI/National Semiconductor LP5812 LED Driver
leds: is31f132xx: Add support for is31fl3293
leds: is31f132xx: Re-order code to remove forward declarations
dt-bindings: leds: Add issi,is31fl3293 to leds-is31fl32xx
leds: expresswire: Fix chip state breakage
dt-bindings: leds: Add LP5860 LED controller
leds: lm3692x: Fix kernel-doc for struct lm3692x_led
25 files changed, 1892 insertions, 166 deletions
diff --git a/Documentation/devicetree/bindings/leds/ams,as3668.yaml b/Documentation/devicetree/bindings/leds/ams,as3668.yaml new file mode 100644 index 000000000000..d1d73782da55 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/ams,as3668.yaml @@ -0,0 +1,74 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/ams,as3668.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Osram 4-channel i2c LED driver + +maintainers: + - Lukas Timmermann <linux@timmermann.space> + +description: + This IC can drive up to four separate LEDs. + Having four channels suggests it could be used with a single RGBW LED. + +properties: + compatible: + const: ams,as3668 + + reg: + maxItems: 1 + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + +patternProperties: + "^led@[0-3]$": + type: object + $ref: common.yaml# + unevaluatedProperties: false + + properties: + reg: + maxItems: 1 + +required: + - compatible + - reg + - "#address-cells" + - "#size-cells" + +additionalProperties: false + +examples: + - | + #include <dt-bindings/leds/common.h> + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + led-controller@42 { + compatible = "ams,as3668"; + reg = <0x42>; + #address-cells = <1>; + #size-cells = <0>; + + led@0 { + reg = <0x0>; + function = LED_FUNCTION_STATUS; + color = <LED_COLOR_ID_RED>; + }; + + led@1 { + reg = <0x1>; + function = LED_FUNCTION_STATUS; + color = <LED_COLOR_ID_GREEN>; + }; + }; + }; + diff --git a/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml b/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml index bb40bb9e036e..7bfc3d807aca 100644 --- a/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml +++ b/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml @@ -21,7 +21,7 @@ description: | properties: $nodename: - pattern: "^multi-led(@[0-9a-f])?$" + pattern: "^multi-led(@[0-9a-f]|-[0-9]+)?$" color: description: | diff --git a/Documentation/devicetree/bindings/leds/leds-is31fl32xx.txt b/Documentation/devicetree/bindings/leds/leds-is31fl32xx.txt index 926c2117942c..7082ed186dd9 100644 --- a/Documentation/devicetree/bindings/leds/leds-is31fl32xx.txt +++ b/Documentation/devicetree/bindings/leds/leds-is31fl32xx.txt @@ -10,6 +10,7 @@ Required properties: issi,is31fl3235 issi,is31fl3218 issi,is31fl3216 + issi,is31fl3293 si-en,sn3218 si-en,sn3216 - reg: I2C slave address diff --git a/Documentation/devicetree/bindings/leds/leds-lm3697.txt b/Documentation/devicetree/bindings/leds/leds-lm3697.txt deleted file mode 100644 index 221b37b6049b..000000000000 --- a/Documentation/devicetree/bindings/leds/leds-lm3697.txt +++ /dev/null @@ -1,73 +0,0 @@ -* Texas Instruments - LM3697 Highly Efficient White LED Driver - -The LM3697 11-bit LED driver provides high- -performance backlight dimming for 1, 2, or 3 series -LED strings while delivering up to 90% efficiency. - -This device is suitable for display and keypad lighting - -Required properties: - - compatible: - "ti,lm3697" - - reg : I2C slave address - - #address-cells : 1 - - #size-cells : 0 - -Optional properties: - - enable-gpios : GPIO pin to enable/disable the device - - vled-supply : LED supply - -Required child properties: - - reg : 0 - LED is Controlled by bank A - 1 - LED is Controlled by bank B - - led-sources : Indicates which HVLED string is associated to which - control bank. This is a zero based property so - HVLED1 = 0, HVLED2 = 1, HVLED3 = 2. - Additional information is contained - in Documentation/devicetree/bindings/leds/common.txt - -Optional child properties: - - ti,brightness-resolution - see Documentation/devicetree/bindings/mfd/ti-lmu.txt - - ramp-up-us: see Documentation/devicetree/bindings/mfd/ti-lmu.txt - - ramp-down-us: see Documentation/devicetree/bindings/mfd/ti-lmu.txt - - label : see Documentation/devicetree/bindings/leds/common.txt - - linux,default-trigger : - see Documentation/devicetree/bindings/leds/common.txt - -Example: - -HVLED string 1 and 3 are controlled by control bank A and HVLED 2 string is -controlled by control bank B. - -led-controller@36 { - compatible = "ti,lm3697"; - #address-cells = <1>; - #size-cells = <0>; - reg = <0x36>; - - enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>; - vled-supply = <&vbatt>; - - led@0 { - reg = <0>; - led-sources = <0 2>; - ti,brightness-resolution = <2047>; - ramp-up-us = <5000>; - ramp-down-us = <1000>; - label = "white:first_backlight_cluster"; - linux,default-trigger = "backlight"; - }; - - led@1 { - reg = <1>; - led-sources = <1>; - ti,brightness-resolution = <255>; - ramp-up-us = <500>; - ramp-down-us = <1000>; - label = "white:second_backlight_cluster"; - linux,default-trigger = "backlight"; - }; -} - -For more product information please see the link below: -https://www.ti.com/lit/ds/symlink/lm3697.pdf diff --git a/Documentation/devicetree/bindings/leds/leds-lp5860.yaml b/Documentation/devicetree/bindings/leds/leds-lp5860.yaml new file mode 100644 index 000000000000..1ccba4854159 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/leds-lp5860.yaml @@ -0,0 +1,111 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/leds-lp5860.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: LED driver for LP5860 RGB LED from Texas Instruments. + +maintainers: + - Steffen Trumtrar <kernel@pengutronix.de> + +description: | + The LP5860 is multi-channel, I2C and SPI RGB LED Driver that can group RGB LEDs + into a LED group or control them individually. + + For more product information please see the link below: + https://www.ti.com/lit/ds/symlink/lp5860.pdf + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + +properties: + compatible: + enum: + - ti,lp5860 + + reg: + maxItems: 1 + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + +patternProperties: + '^multi-led@[0-9a-f]+$': + type: object + $ref: leds-class-multicolor.yaml# + unevaluatedProperties: false + + properties: + reg: + minimum: 0 + maximum: 198 + description: + This property denotes the LED module number that is used + for the child node. + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + patternProperties: + "^led@[0-9a-f]+$": + type: object + $ref: common.yaml# + unevaluatedProperties: false + + properties: + reg: + maxItems: 1 + + required: + - reg + +required: + - compatible + - reg + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/leds/common.h> + + spi { + #address-cells = <1>; + #size-cells = <0>; + + led-controller@0 { + compatible = "ti,lp5860"; + reg = <0x0>; + #address-cells = <1>; + #size-cells = <0>; + + multi-led@0 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0x0>; + color = <LED_COLOR_ID_RGB>; + + led@0 { + reg = <0x0>; + color = <LED_COLOR_ID_RED>; + }; + + led@1 { + reg = <0x1>; + color = <LED_COLOR_ID_GREEN>; + }; + + led@2 { + reg = <0x2>; + color = <LED_COLOR_ID_BLUE>; + }; + }; + }; + }; diff --git a/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml b/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml index c4b7e57b2518..3da0fe532e74 100644 --- a/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml +++ b/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml @@ -43,6 +43,7 @@ properties: - items: - enum: - qcom,pm8550-pwm + - qcom,pmh0101-pwm - const: qcom,pm8350c-pwm - items: - enum: diff --git a/Documentation/devicetree/bindings/leds/qcom,spmi-flash-led.yaml b/Documentation/devicetree/bindings/leds/qcom,spmi-flash-led.yaml index 05250aefd385..3bfa24ff58cd 100644 --- a/Documentation/devicetree/bindings/leds/qcom,spmi-flash-led.yaml +++ b/Documentation/devicetree/bindings/leds/qcom,spmi-flash-led.yaml @@ -29,6 +29,7 @@ properties: - qcom,pm8150l-flash-led - qcom,pm8350c-flash-led - qcom,pm8550-flash-led + - qcom,pmh0101-flash-led - qcom,pmi8998-flash-led - const: qcom,spmi-flash-led diff --git a/Documentation/devicetree/bindings/leds/ti,lm3697.yaml b/Documentation/devicetree/bindings/leds/ti,lm3697.yaml new file mode 100644 index 000000000000..a9f839470a84 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/ti,lm3697.yaml @@ -0,0 +1,125 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/ti,lm3697.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: TI LM3697 Highly Efficient White LED Driver + +maintainers: + - Dan Murphy <dmurphy@ti.com> + +description: > + The LM3697 11-bit LED driver provides high-performance backlight dimming for + 1, 2, or 3 series LED strings while delivering up to 90% efficiency. + + This device is suitable for display and keypad lighting. + +properties: + compatible: + const: ti,lm3697 + + reg: + maxItems: 1 + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + enable-gpios: + description: GPIO pin to enable or disable the device. + maxItems: 1 + + vled-supply: + description: LED supply for the device. + +patternProperties: + '^led@[01]$': + description: LED control bank nodes. + $ref: common.yaml# + unevaluatedProperties: false + + properties: + reg: + description: Control bank selection (0 = bank A, 1 = bank B). + maximum: 1 + + led-sources: + description: > + HVLED strings associated with this control bank: + + 0 - HVLED1 + 1 - HVLED2 + 2 - HVLED3 + minItems: 1 + maxItems: 3 + items: + maximum: 2 + + ti,brightness-resolution: + description: Brightness resolution for the LED string. + $ref: /schemas/types.yaml#/definitions/uint32 + maximum: 2047 + + ramp-up-us: + description: Ramp-up time in microseconds. + minimum: 117 + maximum: 2048 + + ramp-down-us: + description: Ramp-down time in microseconds. + minimum: 117 + maximum: 2048 + + required: + - reg + - led-sources + +required: + - compatible + - reg + - '#address-cells' + - '#size-cells' + +additionalProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + led-controller@36 { + compatible = "ti,lm3697"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0x36>; + + enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>; + vled-supply = <&vbatt>; + + led@0 { + reg = <0>; + led-sources = <0 2>; + ti,brightness-resolution = <2047>; + ramp-up-us = <500>; + ramp-down-us = <1000>; + label = "white:first_backlight_cluster"; + linux,default-trigger = "backlight"; + }; + + led@1 { + reg = <1>; + led-sources = <1>; + ti,brightness-resolution = <255>; + ramp-up-us = <500>; + ramp-down-us = <1000>; + label = "white:second_backlight_cluster"; + linux,default-trigger = "backlight"; + }; + }; + }; diff --git a/Documentation/devicetree/bindings/leds/ti,lp5812.yaml b/Documentation/devicetree/bindings/leds/ti,lp5812.yaml new file mode 100644 index 000000000000..de34bff441c7 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/ti,lp5812.yaml @@ -0,0 +1,246 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/ti,lp5812.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: TI LP5812 4x3 Matrix RGB LED Driver with Autonomous Control + +maintainers: + - Nam Tran <trannamatk@gmail.com> + +description: | + The LP5812 is a 4x3 matrix RGB LED driver with I2C interface + and autonomous animation engine control. + For more product information please see the link below: + https://www.ti.com/product/LP5812#tech-docs + +properties: + compatible: + const: ti,lp5812 + + reg: + maxItems: 1 + + ti,scan-mode: + description: | + Selects the LED scan mode of the LP5812. The device supports + three modes: + - Direct-drive mode (by default if 'ti,scan-mode' is omitted) + drives up to 4 LEDs directly by internal current sinks (LED0-LED3). + - TCM-drive mode ("tcm:<n>:<order...>") drives up to 12 LEDs + (4 RGB) using 1-4 scan multiplexing. The <n> specifies the number + of scans (1-4), and <order...> defines the scan order of the outputs. + - Mix-drive mode ("mix:<n>:<direct>:<order...>") combines + direct-drive and TCM-drive outputs. The <n> specifies the number + of scans, <direct> selects the direct-drive outputs, and <order...> + defines the scan order. + $ref: /schemas/types.yaml#/definitions/string + pattern: '^(tcm|mix):[1-4](:[0-3]){1,4}$' + + vcc-supply: + description: Regulator providing power to the 'VCC' pin. + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + +patternProperties: + "^led@[0-3]$": + type: object + $ref: common.yaml# + unevaluatedProperties: false + + properties: + reg: + minimum: 0 + maximum: 3 + + required: + - reg + + "^multi-led@[4-7]$": + type: object + $ref: leds-class-multicolor.yaml# + unevaluatedProperties: false + + properties: + reg: + minimum: 4 + maximum: 7 + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + + patternProperties: + "^led@[4-9a-f]$": + type: object + $ref: common.yaml# + unevaluatedProperties: false + + properties: + reg: + minimum: 4 + maximum: 15 + + required: + - reg + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + #include <dt-bindings/leds/common.h> + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + led-controller@1b { + #address-cells = <1>; + #size-cells = <0>; + compatible = "ti,lp5812"; + reg = <0x1b>; + ti,scan-mode = "tcm:4:0:1:2:3"; + vcc-supply = <&vdd_3v3_reg>; + + led@0 { + reg = <0x0>; + label = "LED0"; + led-max-microamp = <25500>; + }; + + led@1 { + reg = <0x1>; + label = "LED1"; + led-max-microamp = <25500>; + }; + + led@2 { + reg = <0x2>; + label = "LED2"; + led-max-microamp = <25500>; + }; + + led@3 { + reg = <0x3>; + label = "LED3"; + led-max-microamp = <25500>; + }; + + multi-led@4 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0x4>; + color = <LED_COLOR_ID_RGB>; + label = "LED_A"; + + led@4 { + reg = <0x4>; + color = <LED_COLOR_ID_GREEN>; + led-max-microamp = <25500>; + }; + + led@5 { + reg = <0x5>; + color = <LED_COLOR_ID_RED>; + led-max-microamp = <25500>; + }; + + led@6 { + reg = <0x6>; + color = <LED_COLOR_ID_BLUE>; + led-max-microamp = <25500>; + }; + }; + + multi-led@5 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0x5>; + color = <LED_COLOR_ID_RGB>; + label = "LED_B"; + + led@7 { + reg = <0x7>; + color = <LED_COLOR_ID_GREEN>; + led-max-microamp = <25500>; + }; + + led@8 { + reg = <0x8>; + color = <LED_COLOR_ID_RED>; + led-max-microamp = <25500>; + }; + + led@9 { + reg = <0x9>; + color = <LED_COLOR_ID_BLUE>; + led-max-microamp = <25500>; + }; + }; + + multi-led@6 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0x6>; + color = <LED_COLOR_ID_RGB>; + label = "LED_C"; + + led@a { + reg = <0xa>; + color = <LED_COLOR_ID_GREEN>; + led-max-microamp = <25500>; + }; + + led@b { + reg = <0xb>; + color = <LED_COLOR_ID_RED>; + led-max-microamp = <25500>; + }; + + led@c { + reg = <0xc>; + color = <LED_COLOR_ID_BLUE>; + led-max-microamp = <25500>; + }; + }; + + multi-led@7 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0x7>; + color = <LED_COLOR_ID_RGB>; + label = "LED_D"; + + led@d { + reg = <0xd>; + color = <LED_COLOR_ID_GREEN>; + led-max-microamp = <25500>; + }; + + led@e { + reg = <0xe>; + color = <LED_COLOR_ID_RED>; + led-max-microamp = <25500>; + }; + + led@f { + reg = <0xf>; + color = <LED_COLOR_ID_BLUE>; + led-max-microamp = <25500>; + }; + }; + }; + }; + +... diff --git a/Documentation/leds/index.rst b/Documentation/leds/index.rst index 76fae171039c..bebf44004278 100644 --- a/Documentation/leds/index.rst +++ b/Documentation/leds/index.rst @@ -25,6 +25,7 @@ LEDs leds-lp5523 leds-lp5562 leds-lp55xx + leds-lp5812 leds-mlxcpld leds-mt6370-rgb leds-sc27xx diff --git a/Documentation/leds/leds-lp5812.rst b/Documentation/leds/leds-lp5812.rst new file mode 100644 index 000000000000..c2a6368d5149 --- /dev/null +++ b/Documentation/leds/leds-lp5812.rst @@ -0,0 +1,50 @@ +.. SPDX-License-Identifier: GPL-2.0 + +======================== +Kernel driver for lp5812 +======================== + +* TI/National Semiconductor LP5812 LED Driver +* Datasheet: https://www.ti.com/product/LP5812#tech-docs + +Authors: Jared Zhou <jared-zhou@ti.com> + +Description +=========== + +The LP5812 is a 4x3 matrix LED driver with support for both manual and +autonomous animation control. This driver provides sysfs interfaces to +control and configure the LP5812 device and its LED channels. + +Sysfs Interface +=============== + +This driver uses the standard multicolor LED class interfaces defined +in Documentation/ABI/testing/sysfs-class-led-multicolor.rst. + +Each LP5812 LED output appears under ``/sys/class/leds/`` with its +assigned label (for example ``LED_A``). + +The following attributes are exposed: + - multi_intensity: Per-channel RGB intensity control + - brightness: Standard brightness control (0-255) + +Autonomous Control Modes +======================== + +The driver also supports autonomous control through pattern configuration +(e.g., direct, tcmscan, or mixscan modes) defined in the device tree. +When configured, the LP5812 can generate transitions and color effects +without CPU intervention. + +Refer to the device tree binding document for valid mode strings and +configuration examples. + +Example Usage +============= + +To control LED_A:: + # Set RGB intensity (R=50, G=50, B=50) + echo 50 50 50 > /sys/class/leds/LED_A/multi_intensity + # Set overall brightness to maximum + echo 255 > /sys/class/leds/LED_A/brightness diff --git a/MAINTAINERS b/MAINTAINERS index 8a307490a478..f0529faca06e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3806,6 +3806,13 @@ L: linux-leds@vger.kernel.org S: Maintained F: drivers/leds/flash/leds-as3645a.c +AS3668 LED DRIVER +M: Lukas Timmermann <linux@timmermann.space> +L: linux-leds@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/leds/ams,as3668.yaml +F: drivers/leds/leds-as3668.c + ASAHI KASEI AK7375 LENS VOICE COIL DRIVER M: Tianshu Qiu <tian.shu.qiu@intel.com> L: linux-media@vger.kernel.org @@ -26094,6 +26101,17 @@ S: Supported F: Documentation/devicetree/bindings/iio/dac/ti,dac7612.yaml F: drivers/iio/dac/ti-dac7612.c +TEXAS INSTRUMENTS' LP5812 RGB LED DRIVER +M: Nam Tran <trannamatk@gmail.com> +L: linux-leds@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/leds/ti,lp5812.yaml +F: Documentation/leds/leds-lp5812.rst +F: drivers/leds/rgb/Kconfig +F: drivers/leds/rgb/Makefile +F: drivers/leds/rgb/leds-lp5812.c +F: drivers/leds/rgb/leds-lp5812.h + TEXAS INSTRUMENTS' LB8864 LED BACKLIGHT DRIVER M: Alexander Sverdlin <alexander.sverdlin@siemens.com> L: linux-leds@vger.kernel.org diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 11e7282dc297..597d7a79c988 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -107,6 +107,19 @@ config LEDS_ARIEL Say Y to if your machine is a Dell Wyse 3020 thin client. +config LEDS_OSRAM_AMS_AS3668 + tristate "LED support for Osram AMS AS3668" + depends on LEDS_CLASS + depends on I2C + help + This option enables support for the Osram AMS AS3668 LED controller. + The AS3668 provides up to four LED channels and is controlled via + the I2C bus. This driver offers basic brightness control for each + channel, without support for blinking or other advanced features. + + To compile this driver as a module, choose M here: the module + will be called leds-as3668. + config LEDS_AW200XX tristate "LED support for Awinic AW20036/AW20054/AW20072/AW20108" depends on LEDS_CLASS diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 9a0333ec1a86..8fdb45d5b439 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -15,6 +15,7 @@ obj-$(CONFIG_LEDS_ADP5520) += leds-adp5520.o obj-$(CONFIG_LEDS_AN30259A) += leds-an30259a.o obj-$(CONFIG_LEDS_APU) += leds-apu.o obj-$(CONFIG_LEDS_ARIEL) += leds-ariel.o +obj-$(CONFIG_LEDS_AS3668) += leds-as3668.o obj-$(CONFIG_LEDS_AW200XX) += leds-aw200xx.o obj-$(CONFIG_LEDS_AW2013) += leds-aw2013.o obj-$(CONFIG_LEDS_BCM6328) += leds-bcm6328.o diff --git a/drivers/leds/leds-as3668.c b/drivers/leds/leds-as3668.c new file mode 100644 index 000000000000..b2794492370e --- /dev/null +++ b/drivers/leds/leds-as3668.c @@ -0,0 +1,202 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Osram AMS AS3668 LED Driver IC + * + * Copyright (C) 2025 Lukas Timmermann <linux@timmermann.space> + */ + +#include <linux/bitfield.h> +#include <linux/i2c.h> +#include <linux/leds.h> +#include <linux/module.h> +#include <linux/uleds.h> + +#define AS3668_MAX_LEDS 4 + +/* Chip Ident */ + +#define AS3668_CHIP_ID1_REG 0x3e +#define AS3668_CHIP_ID 0xa5 + +/* Current Control */ + +#define AS3668_CURR_MODE_REG 0x01 +#define AS3668_CURR_MODE_OFF 0x0 +#define AS3668_CURR_MODE_ON 0x1 +#define AS3668_CURR1_MODE_MASK GENMASK(1, 0) +#define AS3668_CURR2_MODE_MASK GENMASK(3, 2) +#define AS3668_CURR3_MODE_MASK GENMASK(5, 4) +#define AS3668_CURR4_MODE_MASK GENMASK(7, 6) +#define AS3668_CURR1_REG 0x02 +#define AS3668_CURR2_REG 0x03 +#define AS3668_CURR3_REG 0x04 +#define AS3668_CURR4_REG 0x05 + +#define AS3668_CURR_MODE_PACK(mode) (((mode) << 0) | \ + ((mode) << 2) | \ + ((mode) << 4) | \ + ((mode) << 6)) + +struct as3668_led { + struct led_classdev cdev; + struct as3668 *chip; + struct fwnode_handle *fwnode; + u8 mode_mask; + u8 current_reg; +}; + +struct as3668 { + struct i2c_client *client; + struct as3668_led leds[AS3668_MAX_LEDS]; +}; + +static int as3668_channel_mode_set(struct as3668_led *led, u8 mode) +{ + int ret; + u8 channel_modes; + + ret = i2c_smbus_read_byte_data(led->chip->client, AS3668_CURR_MODE_REG); + if (ret < 0) { + dev_err(led->cdev.dev, "failed to read channel modes\n"); + return ret; + } + channel_modes = (u8)ret; + + channel_modes &= ~led->mode_mask; + channel_modes |= led->mode_mask & (AS3668_CURR_MODE_PACK(mode)); + + return i2c_smbus_write_byte_data(led->chip->client, AS3668_CURR_MODE_REG, channel_modes); +} + +static enum led_brightness as3668_brightness_get(struct led_classdev *cdev) +{ + struct as3668_led *led = container_of(cdev, struct as3668_led, cdev); + + return i2c_smbus_read_byte_data(led->chip->client, led->current_reg); +} + +static void as3668_brightness_set(struct led_classdev *cdev, enum led_brightness brightness) +{ + struct as3668_led *led = container_of(cdev, struct as3668_led, cdev); + int err; + + err = as3668_channel_mode_set(led, !!brightness); + if (err) + dev_err(cdev->dev, "failed to set channel mode: %d\n", err); + + err = i2c_smbus_write_byte_data(led->chip->client, led->current_reg, brightness); + if (err) + dev_err(cdev->dev, "failed to set brightness: %d\n", err); +} + +static int as3668_dt_init(struct as3668 *as3668) +{ + struct device *dev = &as3668->client->dev; + struct as3668_led *led; + struct led_init_data init_data = {}; + int err; + u32 reg; + + for_each_available_child_of_node_scoped(dev_of_node(dev), child) { + err = of_property_read_u32(child, "reg", ®); + if (err) + return dev_err_probe(dev, err, "failed to read 'reg' property"); + + if (reg < 0 || reg >= AS3668_MAX_LEDS) + return dev_err_probe(dev, -EINVAL, + "unsupported LED: %d\n", reg); + + led = &as3668->leds[reg]; + led->fwnode = of_fwnode_handle(child); + + led->current_reg = reg + AS3668_CURR1_REG; + led->mode_mask = AS3668_CURR1_MODE_MASK << (reg * 2); + led->chip = as3668; + + led->cdev.max_brightness = U8_MAX; + led->cdev.brightness_get = as3668_brightness_get; + led->cdev.brightness_set = as3668_brightness_set; + + init_data.fwnode = led->fwnode; + init_data.default_label = ":"; + + err = devm_led_classdev_register_ext(dev, &led->cdev, &init_data); + if (err) + return dev_err_probe(dev, err, "failed to register LED %d\n", reg); + } + + return 0; +} + +static int as3668_probe(struct i2c_client *client) +{ + struct as3668 *as3668; + int err; + u8 chip_id; + + chip_id = i2c_smbus_read_byte_data(client, AS3668_CHIP_ID1_REG); + if (chip_id != AS3668_CHIP_ID) + return dev_err_probe(&client->dev, -ENODEV, + "expected chip ID 0x%02x, got 0x%02x\n", + AS3668_CHIP_ID, chip_id); + + as3668 = devm_kzalloc(&client->dev, sizeof(*as3668), GFP_KERNEL); + if (!as3668) + return -ENOMEM; + + as3668->client = client; + + err = as3668_dt_init(as3668); + if (err) + return err; + + /* Set all four channel modes to 'off' */ + err = i2c_smbus_write_byte_data(client, AS3668_CURR_MODE_REG, + FIELD_PREP(AS3668_CURR1_MODE_MASK, AS3668_CURR_MODE_OFF) | + FIELD_PREP(AS3668_CURR2_MODE_MASK, AS3668_CURR_MODE_OFF) | + FIELD_PREP(AS3668_CURR3_MODE_MASK, AS3668_CURR_MODE_OFF) | + FIELD_PREP(AS3668_CURR4_MODE_MASK, AS3668_CURR_MODE_OFF)); + + /* Set initial currents to 0mA */ + err |= i2c_smbus_write_byte_data(client, AS3668_CURR1_REG, 0); + err |= i2c_smbus_write_byte_data(client, AS3668_CURR2_REG, 0); + err |= i2c_smbus_write_byte_data(client, AS3668_CURR3_REG, 0); + err |= i2c_smbus_write_byte_data(client, AS3668_CURR4_REG, 0); + + if (err) + return dev_err_probe(&client->dev, -EIO, "failed to set zero initial current levels\n"); + + return 0; +} + +static void as3668_remove(struct i2c_client *client) +{ + i2c_smbus_write_byte_data(client, AS3668_CURR_MODE_REG, 0); +} + +static const struct i2c_device_id as3668_idtable[] = { + { "as3668" }, + { } +}; +MODULE_DEVICE_TABLE(i2c, as3668_idtable); + +static const struct of_device_id as3668_match_table[] = { + { .compatible = "ams,as3668" }, + { } +}; +MODULE_DEVICE_TABLE(of, as3668_match_table); + +static struct i2c_driver as3668_driver = { + .driver = { + .name = "leds_as3668", + .of_match_table = as3668_match_table, + }, + .probe = as3668_probe, + .remove = as3668_remove, + .id_table = as3668_idtable, +}; +module_i2c_driver(as3668_driver); + +MODULE_AUTHOR("Lukas Timmermann <linux@timmermann.space>"); +MODULE_DESCRIPTION("AS3668 LED driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/leds/leds-expresswire.c b/drivers/leds/leds-expresswire.c index bb69be228a6d..25c6b159a6ee 100644 --- a/drivers/leds/leds-expresswire.c +++ b/drivers/leds/leds-expresswire.c @@ -9,6 +9,7 @@ #include <linux/delay.h> #include <linux/export.h> #include <linux/gpio/consumer.h> +#include <linux/irqflags.h> #include <linux/types.h> #include <linux/leds-expresswire.h> @@ -16,37 +17,41 @@ void expresswire_power_off(struct expresswire_common_props *props) { gpiod_set_value_cansleep(props->ctrl_gpio, 0); - usleep_range(props->timing.poweroff_us, props->timing.poweroff_us * 2); + fsleep(props->timing.poweroff_us); } EXPORT_SYMBOL_NS_GPL(expresswire_power_off, "EXPRESSWIRE"); void expresswire_enable(struct expresswire_common_props *props) { + unsigned long flags; + + local_irq_save(flags); + gpiod_set_value(props->ctrl_gpio, 1); udelay(props->timing.detect_delay_us); gpiod_set_value(props->ctrl_gpio, 0); udelay(props->timing.detect_us); gpiod_set_value(props->ctrl_gpio, 1); + + local_irq_restore(flags); } EXPORT_SYMBOL_NS_GPL(expresswire_enable, "EXPRESSWIRE"); -void expresswire_start(struct expresswire_common_props *props) +static void expresswire_start(struct expresswire_common_props *props) { gpiod_set_value(props->ctrl_gpio, 1); udelay(props->timing.data_start_us); } -EXPORT_SYMBOL_NS_GPL(expresswire_start, "EXPRESSWIRE"); -void expresswire_end(struct expresswire_common_props *props) +static void expresswire_end(struct expresswire_common_props *props) { gpiod_set_value(props->ctrl_gpio, 0); udelay(props->timing.end_of_data_low_us); gpiod_set_value(props->ctrl_gpio, 1); udelay(props->timing.end_of_data_high_us); } -EXPORT_SYMBOL_NS_GPL(expresswire_end, "EXPRESSWIRE"); -void expresswire_set_bit(struct expresswire_common_props *props, bool bit) +static void expresswire_set_bit(struct expresswire_common_props *props, bool bit) { if (bit) { gpiod_set_value(props->ctrl_gpio, 0); @@ -60,13 +65,18 @@ void expresswire_set_bit(struct expresswire_common_props *props, bool bit) udelay(props->timing.short_bitset_us); } } -EXPORT_SYMBOL_NS_GPL(expresswire_set_bit, "EXPRESSWIRE"); void expresswire_write_u8(struct expresswire_common_props *props, u8 val) { + unsigned long flags; + + local_irq_save(flags); + expresswire_start(props); for (int i = 7; i >= 0; i--) expresswire_set_bit(props, val & BIT(i)); expresswire_end(props); + + local_irq_restore(flags); } EXPORT_SYMBOL_NS_GPL(expresswire_write_u8, "EXPRESSWIRE"); diff --git a/drivers/leds/leds-is31fl32xx.c b/drivers/leds/leds-is31fl32xx.c index dc9349f9d350..fe07acbb103a 100644 --- a/drivers/leds/leds-is31fl32xx.c +++ b/drivers/leds/leds-is31fl32xx.c @@ -34,10 +34,26 @@ #define IS31FL32XX_PWM_FREQUENCY_22KHZ 0x01 +/* Registers for IS31FL3293 */ +#define IS31FL3293_SHUTDOWN_REG 0x01 +#define IS31FL3293_SHUTDOWN_SSD_DISABLE BIT(0) +#define IS31FL3293_SHUTDOWN_EN1 BIT(4) +#define IS31FL3293_SHUTDOWN_EN2 BIT(5) +#define IS31FL3293_SHUTDOWN_EN3 BIT(6) +#define IS31FL3293_GCC_REG 0x03 +#define IS31FL3293_GCC_LEVEL_MAX 0x3f +#define IS31FL3293_CL_REG 0x10 +#define IS31FL3293_COLOR_UPDATE_REG 0x27 +#define IS31FL3293_COLOR_UPDATE_MAGIC 0xc5 +#define IS31FL3293_RESET_REG 0x3c +#define IS31FL3293_RESET_MAGIC 0xc5 +#define IS31FL3293_MAX_MICROAMP 20000 + struct is31fl32xx_priv; struct is31fl32xx_led_data { struct led_classdev cdev; u8 channel; /* 1-based, max priv->cdef->channels */ + u32 max_microamp; struct is31fl32xx_priv *priv; }; @@ -53,6 +69,7 @@ struct is31fl32xx_priv { * @channels : Number of LED channels * @shutdown_reg : address of Shutdown register (optional) * @pwm_update_reg : address of PWM Update register + * @pwm_update_value : value to write to PWM Update register * @global_control_reg : address of Global Control register (optional) * @reset_reg : address of Reset register (optional) * @output_frequency_setting_reg: address of output frequency register (optional) @@ -60,6 +77,7 @@ struct is31fl32xx_priv { * @pwm_registers_reversed: : true if PWM registers count down instead of up * @led_control_register_base : address of first LED control register (optional) * @enable_bits_per_led_control_register: number of LEDs enable bits in each + * @brightness_steps : number of brightness steps supported by the chip * @reset_func : pointer to reset function * @sw_shutdown_func : pointer to software shutdown function * @@ -77,6 +95,7 @@ struct is31fl32xx_chipdef { u8 channels; u8 shutdown_reg; u8 pwm_update_reg; + u8 pwm_update_value; u8 global_control_reg; u8 reset_reg; u8 output_frequency_setting_reg; @@ -84,76 +103,11 @@ struct is31fl32xx_chipdef { bool pwm_registers_reversed; u8 led_control_register_base; u8 enable_bits_per_led_control_register; + u16 brightness_steps; int (*reset_func)(struct is31fl32xx_priv *priv); int (*sw_shutdown_func)(struct is31fl32xx_priv *priv, bool enable); }; -static const struct is31fl32xx_chipdef is31fl3236_cdef = { - .channels = 36, - .shutdown_reg = 0x00, - .pwm_update_reg = 0x25, - .global_control_reg = 0x4a, - .reset_reg = 0x4f, - .output_frequency_setting_reg = IS31FL32XX_REG_NONE, - .pwm_register_base = 0x01, - .led_control_register_base = 0x26, - .enable_bits_per_led_control_register = 1, -}; - -static const struct is31fl32xx_chipdef is31fl3236a_cdef = { - .channels = 36, - .shutdown_reg = 0x00, - .pwm_update_reg = 0x25, - .global_control_reg = 0x4a, - .reset_reg = 0x4f, - .output_frequency_setting_reg = 0x4b, - .pwm_register_base = 0x01, - .led_control_register_base = 0x26, - .enable_bits_per_led_control_register = 1, -}; - -static const struct is31fl32xx_chipdef is31fl3235_cdef = { - .channels = 28, - .shutdown_reg = 0x00, - .pwm_update_reg = 0x25, - .global_control_reg = 0x4a, - .reset_reg = 0x4f, - .output_frequency_setting_reg = IS31FL32XX_REG_NONE, - .pwm_register_base = 0x05, - .led_control_register_base = 0x2a, - .enable_bits_per_led_control_register = 1, -}; - -static const struct is31fl32xx_chipdef is31fl3218_cdef = { - .channels = 18, - .shutdown_reg = 0x00, - .pwm_update_reg = 0x16, - .global_control_reg = IS31FL32XX_REG_NONE, - .reset_reg = 0x17, - .output_frequency_setting_reg = IS31FL32XX_REG_NONE, - .pwm_register_base = 0x01, - .led_control_register_base = 0x13, - .enable_bits_per_led_control_register = 6, -}; - -static int is31fl3216_reset(struct is31fl32xx_priv *priv); -static int is31fl3216_software_shutdown(struct is31fl32xx_priv *priv, - bool enable); -static const struct is31fl32xx_chipdef is31fl3216_cdef = { - .channels = 16, - .shutdown_reg = IS31FL32XX_REG_NONE, - .pwm_update_reg = 0xB0, - .global_control_reg = IS31FL32XX_REG_NONE, - .reset_reg = IS31FL32XX_REG_NONE, - .output_frequency_setting_reg = IS31FL32XX_REG_NONE, - .pwm_register_base = 0x10, - .pwm_registers_reversed = true, - .led_control_register_base = 0x01, - .enable_bits_per_led_control_register = 8, - .reset_func = is31fl3216_reset, - .sw_shutdown_func = is31fl3216_software_shutdown, -}; - static int is31fl32xx_write(struct is31fl32xx_priv *priv, u8 reg, u8 val) { int ret; @@ -219,6 +173,62 @@ static int is31fl3216_software_shutdown(struct is31fl32xx_priv *priv, } /* + * Custom Reset function for IS31FL3293. We need to set the global current limit + * and write to the color update register once. + */ +static int is31fl3293_reset(struct is31fl32xx_priv *priv) +{ + int i, ret; + + ret = is31fl32xx_write(priv, IS31FL3293_RESET_REG, + IS31FL3293_RESET_MAGIC); + if (ret) + return ret; + + /* Set the global current limit to maximum */ + ret = is31fl32xx_write(priv, IS31FL3293_GCC_REG, + IS31FL3293_GCC_LEVEL_MAX); + if (ret) + return ret; + + for (i = 0; i < priv->num_leds; i++) { + struct is31fl32xx_led_data *led_data = &priv->leds[i]; + int current_level_reg = IS31FL3293_CL_REG + led_data->channel - 1; + int microamp = max(led_data->max_microamp, IS31FL3293_MAX_MICROAMP); + int current_level = (microamp * 0xff) / IS31FL3293_MAX_MICROAMP; + + ret = is31fl32xx_write(priv, current_level_reg, current_level); + if (ret) + return ret; + } + + ret = is31fl32xx_write(priv, IS31FL3293_COLOR_UPDATE_REG, + IS31FL3293_COLOR_UPDATE_MAGIC); + if (ret) + return ret; + + return 0; +} + +/* + * Custom Software-Shutdown function for IS31FL3293 because the SHUTDOWN + * register of this device also has bits to enable the channels. + */ +static int is31fl3293_software_shutdown(struct is31fl32xx_priv *priv, + bool enable) +{ + u8 value = 0; + + if (!enable) + value = IS31FL3293_SHUTDOWN_SSD_DISABLE | + IS31FL3293_SHUTDOWN_EN1 | + IS31FL3293_SHUTDOWN_EN2 | + IS31FL3293_SHUTDOWN_EN3; + + return is31fl32xx_write(priv, IS31FL3293_SHUTDOWN_REG, value); +} + +/* * NOTE: A mutex is not needed in this function because: * - All referenced data is read-only after probe() * - The I2C core has a mutex on to protect the bus @@ -256,13 +266,36 @@ static int is31fl32xx_brightness_set(struct led_classdev *led_cdev, else pwm_register_offset = led_data->channel - 1; - ret = is31fl32xx_write(led_data->priv, - cdef->pwm_register_base + pwm_register_offset, - brightness); - if (ret) - return ret; + switch (cdef->brightness_steps) { + case 256: + ret = is31fl32xx_write(led_data->priv, + cdef->pwm_register_base + pwm_register_offset, + brightness); + if (ret) + return ret; - return is31fl32xx_write(led_data->priv, cdef->pwm_update_reg, 0); + break; + case 4096: + /* IS31FL329x devices use two registers to store 12 bits of brightness */ + pwm_register_offset *= 2; + + ret = is31fl32xx_write(led_data->priv, + cdef->pwm_register_base + pwm_register_offset, + brightness & 0xff); + if (ret) + return ret; + + ret = is31fl32xx_write(led_data->priv, + cdef->pwm_register_base + pwm_register_offset + 1, + (brightness >> 8) & 0xf); + if (ret) + return ret; + + break; + } + + return is31fl32xx_write(led_data->priv, cdef->pwm_update_reg, + cdef->pwm_update_value); } static int is31fl32xx_reset_regs(struct is31fl32xx_priv *priv) @@ -361,6 +394,8 @@ static int is31fl32xx_parse_child_dt(const struct device *dev, } led_data->channel = reg; + of_property_read_u32(child, "led-max-microamp", &led_data->max_microamp); + cdev->brightness_set_blocking = is31fl32xx_brightness_set; return 0; @@ -405,6 +440,7 @@ static int is31fl32xx_parse_dt(struct device *dev, const struct is31fl32xx_led_data *other_led_data; led_data->priv = priv; + led_data->cdev.max_brightness = priv->cdef->brightness_steps - 1; ret = is31fl32xx_parse_child_dt(dev, child, led_data); if (ret) @@ -435,8 +471,89 @@ static int is31fl32xx_parse_dt(struct device *dev, return 0; } +static const struct is31fl32xx_chipdef is31fl3236_cdef = { + .channels = 36, + .shutdown_reg = 0x00, + .pwm_update_reg = 0x25, + .global_control_reg = 0x4a, + .reset_reg = 0x4f, + .output_frequency_setting_reg = IS31FL32XX_REG_NONE, + .pwm_register_base = 0x01, + .led_control_register_base = 0x26, + .enable_bits_per_led_control_register = 1, +}; + +static const struct is31fl32xx_chipdef is31fl3236a_cdef = { + .channels = 36, + .shutdown_reg = 0x00, + .pwm_update_reg = 0x25, + .global_control_reg = 0x4a, + .reset_reg = 0x4f, + .output_frequency_setting_reg = 0x4b, + .pwm_register_base = 0x01, + .led_control_register_base = 0x26, + .enable_bits_per_led_control_register = 1, + .brightness_steps = 256, +}; + +static const struct is31fl32xx_chipdef is31fl3235_cdef = { + .channels = 28, + .shutdown_reg = 0x00, + .pwm_update_reg = 0x25, + .global_control_reg = 0x4a, + .reset_reg = 0x4f, + .output_frequency_setting_reg = IS31FL32XX_REG_NONE, + .pwm_register_base = 0x05, + .led_control_register_base = 0x2a, + .enable_bits_per_led_control_register = 1, + .brightness_steps = 256, +}; + +static const struct is31fl32xx_chipdef is31fl3218_cdef = { + .channels = 18, + .shutdown_reg = 0x00, + .pwm_update_reg = 0x16, + .global_control_reg = IS31FL32XX_REG_NONE, + .reset_reg = 0x17, + .output_frequency_setting_reg = IS31FL32XX_REG_NONE, + .pwm_register_base = 0x01, + .led_control_register_base = 0x13, + .enable_bits_per_led_control_register = 6, + .brightness_steps = 256, +}; + +static const struct is31fl32xx_chipdef is31fl3216_cdef = { + .channels = 16, + .shutdown_reg = IS31FL32XX_REG_NONE, + .pwm_update_reg = 0xB0, + .global_control_reg = IS31FL32XX_REG_NONE, + .reset_reg = IS31FL32XX_REG_NONE, + .output_frequency_setting_reg = IS31FL32XX_REG_NONE, + .pwm_register_base = 0x10, + .pwm_registers_reversed = true, + .led_control_register_base = 0x01, + .enable_bits_per_led_control_register = 8, + .reset_func = is31fl3216_reset, + .sw_shutdown_func = is31fl3216_software_shutdown, + .brightness_steps = 256, +}; + +static const struct is31fl32xx_chipdef is31fl3293_cdef = { + .channels = 3, + .shutdown_reg = IS31FL32XX_REG_NONE, + .pwm_update_reg = 0x28, + .pwm_update_value = 0xc5, + .global_control_reg = IS31FL32XX_REG_NONE, + .reset_reg = IS31FL32XX_REG_NONE, + .pwm_register_base = 0x19, + .led_control_register_base = IS31FL32XX_REG_NONE, + .brightness_steps = 4096, + .reset_func = is31fl3293_reset, + .sw_shutdown_func = is31fl3293_software_shutdown, +}; static const struct of_device_id of_is31fl32xx_match[] = { + { .compatible = "issi,is31fl3293", .data = &is31fl3293_cdef, }, { .compatible = "issi,is31fl3236", .data = &is31fl3236_cdef, }, { .compatible = "issi,is31fl3236a", .data = &is31fl3236a_cdef, }, { .compatible = "issi,is31fl3235", .data = &is31fl3235_cdef, }, @@ -472,11 +589,11 @@ static int is31fl32xx_probe(struct i2c_client *client) priv->cdef = cdef; i2c_set_clientdata(client, priv); - ret = is31fl32xx_init_regs(priv); + ret = is31fl32xx_parse_dt(dev, priv); if (ret) return ret; - ret = is31fl32xx_parse_dt(dev, priv); + ret = is31fl32xx_init_regs(priv); if (ret) return ret; @@ -499,6 +616,7 @@ static void is31fl32xx_remove(struct i2c_client *client) * even though it is not used for DeviceTree based instantiation. */ static const struct i2c_device_id is31fl32xx_id[] = { + { "is31fl3293" }, { "is31fl3236" }, { "is31fl3236a" }, { "is31fl3235" }, diff --git a/drivers/leds/leds-lm3692x.c b/drivers/leds/leds-lm3692x.c index c319ff4d70b2..1d64ceb5ac85 100644 --- a/drivers/leds/leds-lm3692x.c +++ b/drivers/leds/leds-lm3692x.c @@ -104,6 +104,9 @@ * @regulator: LED supply regulator pointer * @led_enable: LED sync to be enabled * @model_id: Current device model ID enumerated + * @boost_ctrl: Cached configuration for the boost control register + * @brightness_ctrl: Cached configuration for brightness/brightness control + * @enabled: Cached enable state of the device */ struct lm3692x_led { struct mutex lock; diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c index fd447eb7eb15..ea131177de96 100644 --- a/drivers/leds/leds-lp55xx-common.c +++ b/drivers/leds/leds-lp55xx-common.c @@ -1204,7 +1204,6 @@ static struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev, struct device_node *np, struct lp55xx_chip *chip) { - struct device_node *child; struct lp55xx_platform_data *pdata; struct lp55xx_led_config *cfg; int num_channels; @@ -1229,12 +1228,10 @@ static struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev, pdata->num_channels = num_channels; cfg->max_channel = chip->cfg->max_channel; - for_each_available_child_of_node(np, child) { + for_each_available_child_of_node_scoped(np, child) { ret = lp55xx_parse_logical_led(child, cfg, i); - if (ret) { - of_node_put(child); + if (ret) return ERR_PTR(-EINVAL); - } i++; } diff --git a/drivers/leds/rgb/Kconfig b/drivers/leds/rgb/Kconfig index 222d943d826a..28ef4c487367 100644 --- a/drivers/leds/rgb/Kconfig +++ b/drivers/leds/rgb/Kconfig @@ -26,6 +26,19 @@ config LEDS_KTD202X To compile this driver as a module, choose M here: the module will be called leds-ktd202x. +config LEDS_LP5812 + tristate "LED support for Texas Instruments LP5812" + depends on I2C + help + If you say Y here you get support for TI LP5812 LED driver. + The LP5812 is a 4x3 matrix RGB LED driver with autonomous + animation engine control. + + To compile this driver as a module, choose M here: the + module will be called leds-lp5812. + + If unsure, say N. + config LEDS_NCP5623 tristate "LED support for NCP5623" depends on I2C diff --git a/drivers/leds/rgb/Makefile b/drivers/leds/rgb/Makefile index a501fd27f179..be45991f63f5 100644 --- a/drivers/leds/rgb/Makefile +++ b/drivers/leds/rgb/Makefile @@ -2,6 +2,7 @@ obj-$(CONFIG_LEDS_GROUP_MULTICOLOR) += leds-group-multicolor.o obj-$(CONFIG_LEDS_KTD202X) += leds-ktd202x.o +obj-$(CONFIG_LEDS_LP5812) += leds-lp5812.o obj-$(CONFIG_LEDS_NCP5623) += leds-ncp5623.o obj-$(CONFIG_LEDS_PWM_MULTICOLOR) += leds-pwm-multicolor.o obj-$(CONFIG_LEDS_QCOM_LPG) += leds-qcom-lpg.o diff --git a/drivers/leds/rgb/leds-lp5812.c b/drivers/leds/rgb/leds-lp5812.c new file mode 100644 index 000000000000..ce6d703641e8 --- /dev/null +++ b/drivers/leds/rgb/leds-lp5812.c @@ -0,0 +1,642 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * LP5812 LED driver + * + * Copyright (C) 2025 Texas Instruments + * + * Author: Jared Zhou <jared-zhou@ti.com> + */ + +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/led-class-multicolor.h> +#include <linux/leds.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/sysfs.h> +#include <linux/types.h> + +#include "leds-lp5812.h" + +static const struct lp5812_mode_mapping chip_mode_map[] = { + {"direct_mode", 0, 0, 0, 0, 0, 0}, + {"tcm:1:0", 1, 0, 0, 0, 0, 0}, + {"tcm:1:1", 1, 1, 0, 0, 0, 0}, + {"tcm:1:2", 1, 2, 0, 0, 0, 0}, + {"tcm:1:3", 1, 3, 0, 0, 0, 0}, + {"tcm:2:0:1", 2, 0, 1, 0, 0, 0}, + {"tcm:2:0:2", 2, 0, 2, 0, 0, 0}, + {"tcm:2:0:3", 2, 0, 3, 0, 0, 0}, + {"tcm:2:1:2", 2, 1, 2, 0, 0, 0}, + {"tcm:2:1:3", 2, 1, 3, 0, 0, 0}, + {"tcm:2:2:3", 2, 2, 3, 0, 0, 0}, + {"tcm:3:0:1:2", 3, 0, 1, 2, 0, 0}, + {"tcm:3:0:1:3", 3, 0, 1, 3, 0, 0}, + {"tcm:3:0:2:3", 3, 0, 2, 3, 0, 0}, + {"tcm:4:0:1:2:3", 4, 0, 1, 2, 3, 0}, + {"mix:1:0:1", 5, 1, 0, 0, 0, 0}, + {"mix:1:0:2", 5, 2, 0, 0, 0, 0}, + {"mix:1:0:3", 5, 3, 0, 0, 0, 0}, + {"mix:1:1:0", 5, 0, 0, 0, 0, 1}, + {"mix:1:1:2", 5, 2, 0, 0, 0, 1}, + {"mix:1:1:3", 5, 3, 0, 0, 0, 1}, + {"mix:1:2:0", 5, 0, 0, 0, 0, 2}, + {"mix:1:2:1", 5, 1, 0, 0, 0, 2}, + {"mix:1:2:3", 5, 3, 0, 0, 0, 2}, + {"mix:1:3:0", 5, 0, 0, 0, 0, 3}, + {"mix:1:3:1", 5, 1, 0, 0, 0, 3}, + {"mix:1:3:2", 5, 2, 0, 0, 0, 3}, + {"mix:2:0:1:2", 6, 1, 2, 0, 0, 0}, + {"mix:2:0:1:3", 6, 1, 3, 0, 0, 0}, + {"mix:2:0:2:3", 6, 2, 3, 0, 0, 0}, + {"mix:2:1:0:2", 6, 0, 2, 0, 0, 1}, + {"mix:2:1:0:3", 6, 0, 3, 0, 0, 1}, + {"mix:2:1:2:3", 6, 2, 3, 0, 0, 1}, + {"mix:2:2:0:1", 6, 0, 1, 0, 0, 2}, + {"mix:2:2:0:3", 6, 0, 3, 0, 0, 2}, + {"mix:2:2:1:3", 6, 1, 3, 0, 0, 2}, + {"mix:2:3:0:1", 6, 0, 1, 0, 0, 3}, + {"mix:2:3:0:2", 6, 0, 2, 0, 0, 3}, + {"mix:2:3:1:2", 6, 1, 2, 0, 0, 3}, + {"mix:3:0:1:2:3", 7, 1, 2, 3, 0, 0}, + {"mix:3:1:0:2:3", 7, 0, 2, 3, 0, 1}, + {"mix:3:2:0:1:3", 7, 0, 1, 3, 0, 2}, + {"mix:3:3:0:1:2", 7, 0, 1, 2, 0, 3} +}; + +static int lp5812_write(struct lp5812_chip *chip, u16 reg, u8 val) +{ + struct device *dev = &chip->client->dev; + struct i2c_msg msg; + u8 buf[LP5812_DATA_LENGTH]; + u8 reg_addr_bit8_9; + int ret; + + /* Extract register address bits 9 and 8 for Address Byte 1 */ + reg_addr_bit8_9 = (reg >> LP5812_REG_ADDR_HIGH_SHIFT) & LP5812_REG_ADDR_BIT_8_9_MASK; + + /* Prepare payload: Address Byte 2 (bits [7:0]) and value to write */ + buf[LP5812_DATA_BYTE_0_IDX] = (u8)(reg & LP5812_REG_ADDR_LOW_MASK); + buf[LP5812_DATA_BYTE_1_IDX] = val; + + /* Construct I2C message for a write operation */ + msg.addr = (chip->client->addr << LP5812_CHIP_ADDR_SHIFT) | reg_addr_bit8_9; + msg.flags = 0; + msg.len = sizeof(buf); + msg.buf = buf; + + ret = i2c_transfer(chip->client->adapter, &msg, 1); + if (ret == 1) + return 0; + + dev_err(dev, "I2C write error, ret=%d\n", ret); + return ret < 0 ? ret : -EIO; +} + +static int lp5812_read(struct lp5812_chip *chip, u16 reg, u8 *val) +{ + struct device *dev = &chip->client->dev; + struct i2c_msg msgs[LP5812_READ_MSG_LENGTH]; + u8 ret_val; + u8 reg_addr_bit8_9; + u8 converted_reg; + int ret; + + /* Extract register address bits 9 and 8 for Address Byte 1 */ + reg_addr_bit8_9 = (reg >> LP5812_REG_ADDR_HIGH_SHIFT) & LP5812_REG_ADDR_BIT_8_9_MASK; + + /* Lower 8 bits go in Address Byte 2 */ + converted_reg = (u8)(reg & LP5812_REG_ADDR_LOW_MASK); + + /* Prepare I2C write message to set register address */ + msgs[LP5812_MSG_0_IDX].addr = + (chip->client->addr << LP5812_CHIP_ADDR_SHIFT) | reg_addr_bit8_9; + msgs[LP5812_MSG_0_IDX].flags = 0; + msgs[LP5812_MSG_0_IDX].len = 1; + msgs[LP5812_MSG_0_IDX].buf = &converted_reg; + + /* Prepare I2C read message to retrieve register value */ + msgs[LP5812_MSG_1_IDX].addr = + (chip->client->addr << LP5812_CHIP_ADDR_SHIFT) | reg_addr_bit8_9; + msgs[LP5812_MSG_1_IDX].flags = I2C_M_RD; + msgs[LP5812_MSG_1_IDX].len = 1; + msgs[LP5812_MSG_1_IDX].buf = &ret_val; + + ret = i2c_transfer(chip->client->adapter, msgs, LP5812_READ_MSG_LENGTH); + if (ret == LP5812_READ_MSG_LENGTH) { + *val = ret_val; + return 0; + } + + dev_err(dev, "I2C read error, ret=%d\n", ret); + *val = 0; + return ret < 0 ? ret : -EIO; +} + +static int lp5812_read_tsd_config_status(struct lp5812_chip *chip, u8 *reg_val) +{ + return lp5812_read(chip, LP5812_TSD_CONFIG_STATUS, reg_val); +} + +static int lp5812_update_regs_config(struct lp5812_chip *chip) +{ + u8 reg_val; + int ret; + + ret = lp5812_write(chip, LP5812_CMD_UPDATE, LP5812_UPDATE_CMD_VAL); + if (ret) + return ret; + + ret = lp5812_read_tsd_config_status(chip, ®_val); + if (ret) + return ret; + + return reg_val & LP5812_CFG_ERR_STATUS_MASK; +} + +static ssize_t parse_drive_mode(struct lp5812_chip *chip, const char *str) +{ + int i; + + chip->drive_mode.bits.mix_sel_led_0 = false; + chip->drive_mode.bits.mix_sel_led_1 = false; + chip->drive_mode.bits.mix_sel_led_2 = false; + chip->drive_mode.bits.mix_sel_led_3 = false; + + if (sysfs_streq(str, LP5812_MODE_DIRECT_NAME)) { + chip->drive_mode.bits.led_mode = LP5812_MODE_DIRECT_VALUE; + return 0; + } + + for (i = 0; i < ARRAY_SIZE(chip_mode_map); i++) { + if (!sysfs_streq(str, chip_mode_map[i].mode_name)) + continue; + + chip->drive_mode.bits.led_mode = chip_mode_map[i].mode; + chip->scan_order.bits.order0 = chip_mode_map[i].scan_order_0; + chip->scan_order.bits.order1 = chip_mode_map[i].scan_order_1; + chip->scan_order.bits.order2 = chip_mode_map[i].scan_order_2; + chip->scan_order.bits.order3 = chip_mode_map[i].scan_order_3; + + switch (chip_mode_map[i].selection_led) { + case LP5812_MODE_MIX_SELECT_LED_0: + chip->drive_mode.bits.mix_sel_led_0 = true; + break; + case LP5812_MODE_MIX_SELECT_LED_1: + chip->drive_mode.bits.mix_sel_led_1 = true; + break; + case LP5812_MODE_MIX_SELECT_LED_2: + chip->drive_mode.bits.mix_sel_led_2 = true; + break; + case LP5812_MODE_MIX_SELECT_LED_3: + chip->drive_mode.bits.mix_sel_led_3 = true; + break; + default: + return -EINVAL; + } + + return 0; + } + + return -EINVAL; +} + +static int lp5812_set_drive_mode_scan_order(struct lp5812_chip *chip) +{ + u8 val; + int ret; + + val = chip->drive_mode.val; + ret = lp5812_write(chip, LP5812_DEV_CONFIG1, val); + if (ret) + return ret; + + val = chip->scan_order.val; + ret = lp5812_write(chip, LP5812_DEV_CONFIG2, val); + + return ret; +} + +static int lp5812_set_led_mode(struct lp5812_chip *chip, int led_number, + enum control_mode mode) +{ + u8 reg_val; + u16 reg; + int ret; + + /* + * Select device configuration register. + * Reg3 for LED_0–LED_3, LED_A0–A2, LED_B0 + * Reg4 for LED_B1–B2, LED_C0–C2, LED_D0–D2 + */ + if (led_number < LP5812_NUMBER_LED_IN_REG) + reg = LP5812_DEV_CONFIG3; + else + reg = LP5812_DEV_CONFIG4; + + ret = lp5812_read(chip, reg, ®_val); + if (ret) + return ret; + + if (mode == LP5812_MODE_MANUAL) + reg_val &= ~(LP5812_ENABLE << (led_number % LP5812_NUMBER_LED_IN_REG)); + else + reg_val |= (LP5812_ENABLE << (led_number % LP5812_NUMBER_LED_IN_REG)); + + ret = lp5812_write(chip, reg, reg_val); + if (ret) + return ret; + + ret = lp5812_update_regs_config(chip); + + return ret; +} + +static int lp5812_manual_dc_pwm_control(struct lp5812_chip *chip, int led_number, + u8 val, enum dimming_type dimming_type) +{ + u16 led_base_reg; + int ret; + + if (dimming_type == LP5812_DIMMING_ANALOG) + led_base_reg = LP5812_MANUAL_DC_BASE; + else + led_base_reg = LP5812_MANUAL_PWM_BASE; + + ret = lp5812_write(chip, led_base_reg + led_number, val); + + return ret; +} + +static int lp5812_multicolor_brightness(struct lp5812_led *led) +{ + struct lp5812_chip *chip = led->chip; + int ret, i; + + guard(mutex)(&chip->lock); + for (i = 0; i < led->mc_cdev.num_colors; i++) { + ret = lp5812_manual_dc_pwm_control(chip, led->mc_cdev.subled_info[i].channel, + led->mc_cdev.subled_info[i].brightness, + LP5812_DIMMING_PWM); + if (ret) + return ret; + } + + return 0; +} + +static int lp5812_led_brightness(struct lp5812_led *led) +{ + struct lp5812_chip *chip = led->chip; + struct lp5812_led_config *led_cfg; + int ret; + + led_cfg = &chip->led_config[led->chan_nr]; + + guard(mutex)(&chip->lock); + ret = lp5812_manual_dc_pwm_control(chip, led_cfg->led_id[0], + led->brightness, LP5812_DIMMING_PWM); + + return ret; +} + +static int lp5812_set_brightness(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct lp5812_led *led = container_of(cdev, struct lp5812_led, cdev); + + led->brightness = (u8)brightness; + + return lp5812_led_brightness(led); +} + +static int lp5812_set_mc_brightness(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct led_classdev_mc *mc_dev = lcdev_to_mccdev(cdev); + struct lp5812_led *led = container_of(mc_dev, struct lp5812_led, mc_cdev); + + led_mc_calc_color_components(&led->mc_cdev, brightness); + + return lp5812_multicolor_brightness(led); +} + +static int lp5812_init_led(struct lp5812_led *led, struct lp5812_chip *chip, int chan) +{ + struct device *dev = &chip->client->dev; + struct mc_subled *mc_led_info; + struct led_classdev *led_cdev; + int i, ret; + + if (chip->led_config[chan].name) { + led->cdev.name = chip->led_config[chan].name; + } else { + led->cdev.name = devm_kasprintf(dev, GFP_KERNEL, "%s:channel%d", + chip->label ? : chip->client->name, chan); + if (!led->cdev.name) + return -ENOMEM; + } + + if (!chip->led_config[chan].is_sc_led) { + mc_led_info = devm_kcalloc(dev, chip->led_config[chan].num_colors, + sizeof(*mc_led_info), GFP_KERNEL); + if (!mc_led_info) + return -ENOMEM; + + led_cdev = &led->mc_cdev.led_cdev; + led_cdev->name = led->cdev.name; + led_cdev->brightness_set_blocking = lp5812_set_mc_brightness; + led->mc_cdev.num_colors = chip->led_config[chan].num_colors; + + for (i = 0; i < led->mc_cdev.num_colors; i++) { + mc_led_info[i].color_index = chip->led_config[chan].color_id[i]; + mc_led_info[i].channel = chip->led_config[chan].led_id[i]; + } + + led->mc_cdev.subled_info = mc_led_info; + } else { + led->cdev.brightness_set_blocking = lp5812_set_brightness; + } + + led->chan_nr = chan; + + if (chip->led_config[chan].is_sc_led) { + ret = devm_led_classdev_register(dev, &led->cdev); + if (ret == 0) + led->cdev.dev->platform_data = led; + } else { + ret = devm_led_classdev_multicolor_register(dev, &led->mc_cdev); + if (ret == 0) + led->mc_cdev.led_cdev.dev->platform_data = led; + } + + return ret; +} + +static int lp5812_register_leds(struct lp5812_led *leds, struct lp5812_chip *chip) +{ + struct lp5812_led *led; + int num_channels = chip->num_channels; + u8 reg_val; + u16 reg; + int ret, i, j; + + for (i = 0; i < num_channels; i++) { + led = &leds[i]; + ret = lp5812_init_led(led, chip, i); + if (ret) + goto err_init_led; + + led->chip = chip; + + for (j = 0; j < chip->led_config[i].num_colors; j++) { + ret = lp5812_write(chip, + LP5812_AUTO_DC_BASE + chip->led_config[i].led_id[j], + chip->led_config[i].max_current[j]); + if (ret) + goto err_init_led; + + ret = lp5812_manual_dc_pwm_control(chip, chip->led_config[i].led_id[j], + chip->led_config[i].max_current[j], + LP5812_DIMMING_ANALOG); + if (ret) + goto err_init_led; + + ret = lp5812_set_led_mode(chip, chip->led_config[i].led_id[j], + LP5812_MODE_MANUAL); + if (ret) + goto err_init_led; + + reg = (chip->led_config[i].led_id[j] < LP5812_NUMBER_LED_IN_REG) ? + LP5812_LED_EN_1 : LP5812_LED_EN_2; + + ret = lp5812_read(chip, reg, ®_val); + if (ret) + goto err_init_led; + + reg_val |= (LP5812_ENABLE << (chip->led_config[i].led_id[j] % + LP5812_NUMBER_LED_IN_REG)); + + ret = lp5812_write(chip, reg, reg_val); + if (ret) + goto err_init_led; + } + } + + return 0; + +err_init_led: + return ret; +} + +static int lp5812_init_device(struct lp5812_chip *chip) +{ + int ret; + + usleep_range(LP5812_WAIT_DEVICE_STABLE_MIN, LP5812_WAIT_DEVICE_STABLE_MAX); + + ret = lp5812_write(chip, LP5812_REG_ENABLE, LP5812_ENABLE); + if (ret) { + dev_err(&chip->client->dev, "failed to enable LP5812 device\n"); + return ret; + } + + ret = lp5812_write(chip, LP5812_DEV_CONFIG12, LP5812_LSD_LOD_START_UP); + if (ret) { + dev_err(&chip->client->dev, "failed to configure device safety thresholds\n"); + return ret; + } + + ret = parse_drive_mode(chip, chip->scan_mode); + if (ret) + return ret; + + ret = lp5812_set_drive_mode_scan_order(chip); + if (ret) + return ret; + + ret = lp5812_update_regs_config(chip); + if (ret) { + dev_err(&chip->client->dev, "failed to apply configuration updates\n"); + return ret; + } + + return 0; +} + +static void lp5812_deinit_device(struct lp5812_chip *chip) +{ + lp5812_write(chip, LP5812_LED_EN_1, LP5812_DISABLE); + lp5812_write(chip, LP5812_LED_EN_2, LP5812_DISABLE); + lp5812_write(chip, LP5812_REG_ENABLE, LP5812_DISABLE); +} + +static int lp5812_parse_led_channel(struct device_node *np, + struct lp5812_led_config *cfg, + int color_number) +{ + int color_id, reg, ret; + u32 max_cur; + + ret = of_property_read_u32(np, "reg", ®); + if (ret) + return ret; + + cfg->led_id[color_number] = reg; + + ret = of_property_read_u32(np, "led-max-microamp", &max_cur); + if (ret) + max_cur = 0; + /* Convert microamps to driver units */ + cfg->max_current[color_number] = max_cur / 100; + + ret = of_property_read_u32(np, "color", &color_id); + if (ret) + color_id = 0; + cfg->color_id[color_number] = color_id; + + return 0; +} + +static int lp5812_parse_led(struct device_node *np, + struct lp5812_led_config *cfg, + int led_index) +{ + int num_colors, ret; + + of_property_read_string(np, "label", &cfg[led_index].name); + + ret = of_property_read_u32(np, "reg", &cfg[led_index].chan_nr); + if (ret) + return ret; + + num_colors = 0; + for_each_available_child_of_node_scoped(np, child) { + ret = lp5812_parse_led_channel(child, &cfg[led_index], num_colors); + if (ret) + return ret; + + num_colors++; + } + + if (num_colors == 0) { + ret = lp5812_parse_led_channel(np, &cfg[led_index], 0); + if (ret) + return ret; + + num_colors = 1; + cfg[led_index].is_sc_led = true; + } else { + cfg[led_index].is_sc_led = false; + } + + cfg[led_index].num_colors = num_colors; + + return 0; +} + +static int lp5812_of_probe(struct device *dev, + struct device_node *np, + struct lp5812_chip *chip) +{ + struct lp5812_led_config *cfg; + int num_channels, i = 0, ret; + + num_channels = of_get_available_child_count(np); + if (num_channels == 0) { + dev_err(dev, "no LED channels\n"); + return -EINVAL; + } + + cfg = devm_kcalloc(dev, num_channels, sizeof(*cfg), GFP_KERNEL); + if (!cfg) + return -ENOMEM; + + chip->led_config = &cfg[0]; + chip->num_channels = num_channels; + + for_each_available_child_of_node_scoped(np, child) { + ret = lp5812_parse_led(child, cfg, i); + if (ret) + return -EINVAL; + i++; + } + + ret = of_property_read_string(np, "ti,scan-mode", &chip->scan_mode); + if (ret) + chip->scan_mode = LP5812_MODE_DIRECT_NAME; + + of_property_read_string(np, "label", &chip->label); + + return 0; +} + +static int lp5812_probe(struct i2c_client *client) +{ + struct lp5812_chip *chip; + struct device_node *np = dev_of_node(&client->dev); + struct lp5812_led *leds; + int ret; + + if (!np) + return -EINVAL; + + chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + ret = lp5812_of_probe(&client->dev, np, chip); + if (ret) + return ret; + + leds = devm_kcalloc(&client->dev, chip->num_channels, sizeof(*leds), GFP_KERNEL); + if (!leds) + return -ENOMEM; + + chip->client = client; + mutex_init(&chip->lock); + i2c_set_clientdata(client, chip); + + ret = lp5812_init_device(chip); + if (ret) + return ret; + + ret = lp5812_register_leds(leds, chip); + if (ret) + goto err_out; + + return 0; + +err_out: + lp5812_deinit_device(chip); + return ret; +} + +static void lp5812_remove(struct i2c_client *client) +{ + struct lp5812_chip *chip = i2c_get_clientdata(client); + + lp5812_deinit_device(chip); +} + +static const struct of_device_id of_lp5812_match[] = { + { .compatible = "ti,lp5812" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, of_lp5812_match); + +static struct i2c_driver lp5812_driver = { + .driver = { + .name = "lp5812", + .of_match_table = of_lp5812_match, + }, + .probe = lp5812_probe, + .remove = lp5812_remove, +}; +module_i2c_driver(lp5812_driver); + +MODULE_DESCRIPTION("Texas Instruments LP5812 LED Driver"); +MODULE_AUTHOR("Jared Zhou <jared-zhou@ti.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/leds/rgb/leds-lp5812.h b/drivers/leds/rgb/leds-lp5812.h new file mode 100644 index 000000000000..d8728ecd90b3 --- /dev/null +++ b/drivers/leds/rgb/leds-lp5812.h @@ -0,0 +1,172 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * LP5812 Driver Header + * + * Copyright (C) 2025 Texas Instruments + * + * Author: Jared Zhou <jared-zhou@ti.com> + */ + +#ifndef _LP5812_H_ +#define _LP5812_H_ + +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/kernel.h> +#include <linux/led-class-multicolor.h> +#include <linux/leds.h> +#include <linux/mutex.h> +#include <linux/sysfs.h> +#include <linux/types.h> + +#define LP5812_REG_ENABLE 0x0000 +#define LP5812_REG_RESET 0x0023 +#define LP5812_DEV_CONFIG0 0x0001 +#define LP5812_DEV_CONFIG1 0x0002 +#define LP5812_DEV_CONFIG2 0x0003 +#define LP5812_DEV_CONFIG3 0x0004 +#define LP5812_DEV_CONFIG4 0x0005 +#define LP5812_DEV_CONFIG5 0x0006 +#define LP5812_DEV_CONFIG6 0x0007 +#define LP5812_DEV_CONFIG7 0x0008 +#define LP5812_DEV_CONFIG8 0x0009 +#define LP5812_DEV_CONFIG9 0x000A +#define LP5812_DEV_CONFIG10 0x000B +#define LP5812_DEV_CONFIG11 0x000c +#define LP5812_DEV_CONFIG12 0x000D +#define LP5812_CMD_UPDATE 0x0010 +#define LP5812_LED_EN_1 0x0020 +#define LP5812_LED_EN_2 0x0021 +#define LP5812_FAULT_CLEAR 0x0022 +#define LP5812_MANUAL_DC_BASE 0x0030 +#define LP5812_AUTO_DC_BASE 0x0050 +#define LP5812_MANUAL_PWM_BASE 0x0040 + +#define LP5812_TSD_CONFIG_STATUS 0x0300 +#define LP5812_LOD_STATUS 0x0301 +#define LP5812_LSD_STATUS 0x0303 + +#define LP5812_ENABLE 0x01 +#define LP5812_DISABLE 0x00 +#define FAULT_CLEAR_ALL 0x07 +#define TSD_CLEAR_VAL 0x04 +#define LSD_CLEAR_VAL 0x02 +#define LOD_CLEAR_VAL 0x01 +#define LP5812_RESET 0x66 +#define LP5812_DEV_CONFIG12_DEFAULT 0x08 + +#define LP5812_UPDATE_CMD_VAL 0x55 +#define LP5812_REG_ADDR_HIGH_SHIFT 8 +#define LP5812_REG_ADDR_BIT_8_9_MASK 0x03 +#define LP5812_REG_ADDR_LOW_MASK 0xFF +#define LP5812_CHIP_ADDR_SHIFT 2 +#define LP5812_DATA_LENGTH 2 +#define LP5812_DATA_BYTE_0_IDX 0 +#define LP5812_DATA_BYTE_1_IDX 1 + +#define LP5812_READ_MSG_LENGTH 2 +#define LP5812_MSG_0_IDX 0 +#define LP5812_MSG_1_IDX 1 +#define LP5812_CFG_ERR_STATUS_MASK 0x01 +#define LP5812_CFG_TSD_STATUS_SHIFT 1 +#define LP5812_CFG_TSD_STATUS_MASK 0x01 + +#define LP5812_FAULT_CLEAR_LOD 0 +#define LP5812_FAULT_CLEAR_LSD 1 +#define LP5812_FAULT_CLEAR_TSD 2 +#define LP5812_FAULT_CLEAR_ALL 3 +#define LP5812_NUMBER_LED_IN_REG 8 + +#define LP5812_WAIT_DEVICE_STABLE_MIN 1000 +#define LP5812_WAIT_DEVICE_STABLE_MAX 1100 + +#define LP5812_LSD_LOD_START_UP 0x0B +#define LP5812_MODE_NAME_MAX_LEN 20 +#define LP5812_MODE_DIRECT_NAME "direct_mode" +#define LP5812_MODE_DIRECT_VALUE 0 +#define LP5812_MODE_MIX_SELECT_LED_0 0 +#define LP5812_MODE_MIX_SELECT_LED_1 1 +#define LP5812_MODE_MIX_SELECT_LED_2 2 +#define LP5812_MODE_MIX_SELECT_LED_3 3 + +enum control_mode { + LP5812_MODE_MANUAL = 0, + LP5812_MODE_AUTONOMOUS +}; + +enum dimming_type { + LP5812_DIMMING_ANALOG, + LP5812_DIMMING_PWM +}; + +union lp5812_scan_order { + struct { + u8 order0:2; + u8 order1:2; + u8 order2:2; + u8 order3:2; + } bits; + u8 val; +}; + +union lp5812_drive_mode { + struct { + u8 mix_sel_led_0:1; + u8 mix_sel_led_1:1; + u8 mix_sel_led_2:1; + u8 mix_sel_led_3:1; + u8 led_mode:3; + u8 pwm_fre:1; + } bits; + u8 val; +}; + +struct lp5812_reg { + u16 addr; + union { + u8 val; + u8 mask; + u8 shift; + }; +}; + +struct lp5812_mode_mapping { + char mode_name[LP5812_MODE_NAME_MAX_LEN]; + u8 mode; + u8 scan_order_0; + u8 scan_order_1; + u8 scan_order_2; + u8 scan_order_3; + u8 selection_led; +}; + +struct lp5812_led_config { + bool is_sc_led; + const char *name; + u8 color_id[LED_COLOR_ID_MAX]; + u32 max_current[LED_COLOR_ID_MAX]; + int chan_nr; + int num_colors; + int led_id[LED_COLOR_ID_MAX]; +}; + +struct lp5812_chip { + u8 num_channels; + struct i2c_client *client; + struct mutex lock; /* Protects register access */ + struct lp5812_led_config *led_config; + const char *label; + const char *scan_mode; + union lp5812_scan_order scan_order; + union lp5812_drive_mode drive_mode; +}; + +struct lp5812_led { + u8 brightness; + int chan_nr; + struct led_classdev cdev; + struct led_classdev_mc mc_cdev; + struct lp5812_chip *chip; +}; + +#endif /*_LP5812_H_*/ diff --git a/drivers/leds/rgb/leds-qcom-lpg.c b/drivers/leds/rgb/leds-qcom-lpg.c index 72da0bf469ad..f54851dfb42f 100644 --- a/drivers/leds/rgb/leds-qcom-lpg.c +++ b/drivers/leds/rgb/leds-qcom-lpg.c @@ -369,7 +369,7 @@ static int lpg_lut_store(struct lpg *lpg, struct led_pattern *pattern, { unsigned int idx; u16 val; - int i; + int i, ret; idx = bitmap_find_next_zero_area(lpg->lut_bitmap, lpg->lut_size, 0, len, 0); @@ -379,8 +379,10 @@ static int lpg_lut_store(struct lpg *lpg, struct led_pattern *pattern, for (i = 0; i < len; i++) { val = pattern[i].brightness; - regmap_bulk_write(lpg->map, lpg->lut_base + LPG_LUT_REG(idx + i), - &val, sizeof(val)); + ret = regmap_bulk_write(lpg->map, lpg->lut_base + LPG_LUT_REG(idx + i), + &val, sizeof(val)); + if (ret) + return ret; } bitmap_set(lpg->lut_bitmap, idx, len); diff --git a/include/linux/leds-expresswire.h b/include/linux/leds-expresswire.h index a422921f4159..7f8c4795f69f 100644 --- a/include/linux/leds-expresswire.h +++ b/include/linux/leds-expresswire.h @@ -30,9 +30,6 @@ struct expresswire_common_props { void expresswire_power_off(struct expresswire_common_props *props); void expresswire_enable(struct expresswire_common_props *props); -void expresswire_start(struct expresswire_common_props *props); -void expresswire_end(struct expresswire_common_props *props); -void expresswire_set_bit(struct expresswire_common_props *props, bool bit); void expresswire_write_u8(struct expresswire_common_props *props, u8 val); #endif /* _LEDS_EXPRESSWIRE_H */ |
