linux-toradex.git/drivers/watchdog, branch v5.17-rc4

Merge tag 'linux-watchdog-5.17-rc1' of git://www.linux-watchdog.org/linux-watchdog

2022-01-17T06:07:57+00:00

Pull watchdog updates from Wim Van Sebroeck:

 - New device support:
     - Watchdog Timer driver for RZ/G2L
     - Realtek Otto watchdog timer
     - Apple SoC watchdog driver
     - Fintek F81966

 - Remove BCM63XX_WDT after support for this SoC was added to
   BCM7038_WDT

 - Improvements of the BCM7038_WDT and s3c2410_wdt code

 - Several other fixes and improvements

* tag 'linux-watchdog-5.17-rc1' of git://www.linux-watchdog.org/linux-watchdog: (38 commits)
  watchdog: msc313e: Check if the WDT was running at boot
  watchdog: Add Apple SoC watchdog driver
  dt-bindings: watchdog: Add SM6350 and SM8250 compatible
  watchdog: s3c2410: Fix getting the optional clock
  watchdog: s3c2410: Use platform_get_irq() to get the interrupt
  dt-bindings: watchdog: atmel: Add missing 'interrupts' property
  watchdog: mtk_wdt: use platform_get_irq_optional
  watchdog: Add Watchdog Timer driver for RZ/G2L
  dt-bindings: watchdog: renesas,wdt: Add support for RZ/G2L
  watchdog: da9063: Add hard dependency on I2C
  watchdog: Add Realtek Otto watchdog timer
  dt-bindings: watchdog: Realtek Otto WDT binding
  watchdog: s3c2410: Add Exynos850 support
  watchdog: da9063: use atomic safe i2c transfer in reset handler
  watchdog: davinci: Use div64_ul instead of do_div
  watchdog: Remove BCM63XX_WDT
  MIPS: BCM63XX: Provide platform data to watchdog device
  watchdog: bcm7038_wdt: Add platform device id for bcm63xx-wdt
  watchdog: Allow building BCM7038_WDT for BCM63XX
  watchdog: bcm7038_wdt: Support platform data configuration
  ...

watchdog: msc313e: Check if the WDT was running at boot

2022-01-05T09:38:51+00:00

Check if the WDT was running at boot and set the running
flag if it was. This prevents the system from getting
rebooted if the userland daemon doesn't take over soon enough
or there isn't a userland daemon at all.

Signed-off-by: Daniel Palmer 
Reviewed-by: Romain Perier 
Reviewed-by: Guenter Roeck 
Link: https://lore.kernel.org/r/20211228073427.2443174-1-daniel@0x0f.com
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: Add Apple SoC watchdog driver

2022-01-05T09:38:37+00:00

Add support for the watchdog timer found in Apple SoCs. This driver is
also required to reboot these machines.

Signed-off-by: Sven Peter 
Tested-by: Janne Grunau 
Reviewed-by: Hector Martin 
Reviewed-by: Guenter Roeck 
Link: https://lore.kernel.org/r/20211211123633.4392-2-sven@svenpeter.dev
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: s3c2410: Fix getting the optional clock

2022-01-05T09:38:37+00:00

"watchdog_src" clock is optional and may not be present for some SoCs
supported by this driver. Nevertheless, in case the clock is provided
but some error happens during its getting, that error should be handled
properly. Use devm_clk_get_optional() API for that. Also report possible
errors using dev_err_probe() to handle properly -EPROBE_DEFER error (if
clock provider is not ready by the time WDT probe function is executed).

Fixes: e249d01b5e8b ("watchdog: s3c2410: Support separate source clock")
Reported-by: kernel test robot 
Reported-by: Dan Carpenter 
Suggested-by: Guenter Roeck 
Signed-off-by: Sam Protsenko 
Reviewed-by: Guenter Roeck 
Reviewed-by: Krzysztof Kozlowski 
Link: https://lore.kernel.org/r/20211212170247.30646-1-semen.protsenko@linaro.org
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: s3c2410: Use platform_get_irq() to get the interrupt

2022-01-05T09:38:36+00:00

platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
allocation of IRQ resources in DT core code, this causes an issue
when using hierarchical interrupt domains using "interrupts" property
in the node as this bypassed the hierarchical setup and messed up the
irq chaining.

In preparation for removal of static setup of IRQ resource from DT core
code use platform_get_irq().

Signed-off-by: Lad Prabhakar 
Reviewed-by: Guenter Roeck 
Reviewed-by: Krzysztof Kozlowski 
Link: https://lore.kernel.org/r/20211216214747.10454-1-prabhakar.mahadev-lad.rj@bp.renesas.com
[groeck: Fixed context conflicts]
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: mtk_wdt: use platform_get_irq_optional

2022-01-05T09:33:16+00:00

The watchdog pre-timeout (bark) interrupt is optional.  Use
platform_get_irq_optional() to avoid seeing such following
error message:
>>> mtk-wdt 10007000.watchdog: IRQ index 0 not found

Signed-off-by: Tzung-Bi Shih 
Reviewed-by: Guenter Roeck 
Link: https://lore.kernel.org/r/20211208095555.4099551-1-tzungbi@google.com
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: Add Watchdog Timer driver for RZ/G2L

2022-01-05T09:33:15+00:00

Add Watchdog Timer driver for RZ/G2L SoC.

WDT IP block supports normal watchdog timer function and reset
request function due to CPU parity error.

This driver currently supports normal watchdog timer function
and later will add support for reset request function due to
CPU parity error.

Signed-off-by: Biju Das 
Reviewed-by: Guenter Roeck 
Link: https://lore.kernel.org/r/20211130195357.18626-3-biju.das.jz@bp.renesas.com
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: da9063: Add hard dependency on I2C

2022-01-05T09:33:15+00:00

Commit 5ea29919c294 ("watchdog: da9063: use atomic safe i2c transfer in
reset handler") implements atomic save i2c transfer which uses i2c
functions directly. Add I2C hard dependency which overrides COMPILE_TEST.

Reported-by: kernel test robot 
Fixes: 968011a291f3 ("watchdog: da9063: use atomic safe i2c transfer in reset handler")
Signed-off-by: Andrej Picej 
Reviewed-by: Guenter Roeck 
Link: https://lore.kernel.org/r/20211129134938.3273289-1-andrej.picej@norik.com
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: Add Realtek Otto watchdog timer

2022-01-05T09:33:14+00:00

Realtek MIPS SoCs (platform name Otto) have a watchdog timer with
pretimeout notifitication support. The WDT can (partially) hard reset,
or soft reset the SoC.

This driver implements all features as described in the devicetree
binding, except the phase2 interrupt, and also functions as a restart
handler. The cpu reset mode is considered to be a "warm" restart, since
this mode does not reset all peripherals. Being an embedded system
though, the "cpu" and "software" modes will still cause the bootloader
to run on restart.

It is not known how a forced system reset can be disabled on the
supported platforms. This means that the phase2 interrupt will only fire
at the same time as reset, so implementing phase2 is of little use.

Signed-off-by: Sander Vanheule 
Reviewed-by: Guenter Roeck 
Link: https://lore.kernel.org/r/6d060bccbdcc709cfa79203485db85aad3c3beb5.1637252610.git.sander@svanheule.net
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: s3c2410: Add Exynos850 support

2021-12-28T13:08:51+00:00

Exynos850 is a bit different from SoCs already supported in WDT driver:
  - AUTOMATIC_WDT_RESET_DISABLE register is removed, so its value is
    always 0; .disable_auto_reset callback is not set for that reason
  - MASK_WDT_RESET_REQUEST register is replaced with
    CLUSTERx_NONCPU_IN_EN register; instead of masking (disabling) WDT
    reset interrupt it's now enabled with the same value; .mask_reset
    callback is reused for that functionality though
  - To make WDT functional, WDT counter needs to be enabled in
    CLUSTERx_NONCPU_OUT register; it's done using .enable_counter
    callback

Also Exynos850 has two CPU clusters, each has its own dedicated WDT
instance. Different PMU registers and bits are used for each cluster. So
driver data is now modified in probe, adding needed info depending on
cluster index passed from device tree.

Signed-off-by: Sam Protsenko 
Reviewed-by: Krzysztof Kozlowski 
Reviewed-by: Guenter Roeck 
Link: https://lore.kernel.org/r/20211121165647.26706-13-semen.protsenko@linaro.org
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck