From d305910bbfafc07bc136028f988a161a928a18fd Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Thu, 11 Aug 2016 19:26:25 +0200 Subject: dt: bindings: Add binding for ESP8089 wifi chips The ESP8089 chips can mostly be enumerated via their sdio interface, but they are clocked by an external crystal which may differ from one board to the other. This commit adds a binding for the sdio child node for these chips, allowing to specify the external crystal type (for now, this binding could be be extended with e.g. OOB irq support later). The Android driver for this chip uses a text file with key,value pairs which gets loaded as firmware to pass this info to the firmware. The "esp,crystal_26M_en" name is chosen to match the crystal_26M_en key-name in that text file. Note that at this point there only is an out of tree driver for this hardware, there is no clear timeline / path for merging this. Still I believe it would be good to specify the binding for this in tree now, so that any future migration to an in tree driver will not cause compatiblity issues. Cc: Icenowy Zheng Signed-off-by: Hans de Goede Signed-off-by: Rob Herring --- .../bindings/net/wireless/esp,esp8089.txt | 31 ++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/wireless/esp,esp8089.txt (limited to 'Documentation/devicetree/bindings/net') diff --git a/Documentation/devicetree/bindings/net/wireless/esp,esp8089.txt b/Documentation/devicetree/bindings/net/wireless/esp,esp8089.txt new file mode 100644 index 000000000000..19331bb4ff6e --- /dev/null +++ b/Documentation/devicetree/bindings/net/wireless/esp,esp8089.txt @@ -0,0 +1,31 @@ +Espressif ESP8089 wireless SDIO devices + +This node provides properties for controlling the ESP8089 wireless device. +The node is expected to be specified as a child node to the SDIO controller +that connects the device to the system. + +Required properties: + + - compatible : Should be "esp,esp8089". + +Optional properties: + - esp,crystal-26M-en: Integer value for the crystal_26M_en firmware parameter + +Example: + +&mmc1 { + #address-cells = <1>; + #size-cells = <0>; + + vmmc-supply = <®_dldo1>; + mmc-pwrseq = <&wifi_pwrseq>; + bus-width = <4>; + non-removable; + status = "okay"; + + esp8089: sdio_wifi@1 { + compatible = "esp,esp8089"; + reg = <1>; + esp,crystal-26M-en = <2>; + }; +}; -- cgit v1.2.3 From d4b8e2c5b07e20f3ef0ca0a2bde390beb0f8fda5 Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Thu, 1 Sep 2016 13:02:16 -0600 Subject: dt: net: enhance DWC EQoS binding to support Tegra186 The Synopsys DWC EQoS is a configurable IP block which supports multiple options for bus type, clocking and reset structure, and feature list. Extend the DT binding to define a "compatible value" for the configuration contained in NVIDIA's Tegra186 SoC, and define some new properties and list property entries required by that configuration. Signed-off-by: Stephen Warren Signed-off-by: Rob Herring --- .../bindings/net/snps,dwc-qos-ethernet.txt | 99 +++++++++++++++++++++- 1 file changed, 95 insertions(+), 4 deletions(-) (limited to 'Documentation/devicetree/bindings/net') diff --git a/Documentation/devicetree/bindings/net/snps,dwc-qos-ethernet.txt b/Documentation/devicetree/bindings/net/snps,dwc-qos-ethernet.txt index 51f8d2eba8d8..d93f71ce8346 100644 --- a/Documentation/devicetree/bindings/net/snps,dwc-qos-ethernet.txt +++ b/Documentation/devicetree/bindings/net/snps,dwc-qos-ethernet.txt @@ -1,21 +1,111 @@ * Synopsys DWC Ethernet QoS IP version 4.10 driver (GMAC) +This binding supports the Synopsys Designware Ethernet QoS (Quality Of Service) +IP block. The IP supports multiple options for bus type, clocking and reset +structure, and feature list. Consequently, a number of properties and list +entries in properties are marked as optional, or only required in specific HW +configurations. Required properties: -- compatible: Should be "snps,dwc-qos-ethernet-4.10" +- compatible: One of: + - "axis,artpec6-eqos", "snps,dwc-qos-ethernet-4.10" + Represents the IP core when integrated into the Axis ARTPEC-6 SoC. + - "nvidia,tegra186-eqos", "snps,dwc-qos-ethernet-4.10" + Represents the IP core when integrated into the NVIDIA Tegra186 SoC. + - "snps,dwc-qos-ethernet-4.10" + This combination is deprecated. It should be treated as equivalent to + "axis,artpec6-eqos", "snps,dwc-qos-ethernet-4.10". It is supported to be + compatible with earlier revisions of this binding. - reg: Address and length of the register set for the device -- clocks: Phandles to the reference clock and the bus clock -- clock-names: Should be "phy_ref_clk" for the reference clock and "apb_pclk" - for the bus clock. +- clocks: Phandle and clock specifiers for each entry in clock-names, in the + same order. See ../clock/clock-bindings.txt. +- clock-names: May contain any/all of the following depending on the IP + configuration, in any order: + - "tx" + The EQOS transmit path clock. The HW signal name is clk_tx_i. + In some configurations (e.g. GMII/RGMII), this clock also drives the PHY TX + path. In other configurations, other clocks (such as tx_125, rmii) may + drive the PHY TX path. + - "rx" + The EQOS receive path clock. The HW signal name is clk_rx_i. + In some configurations (e.g. GMII/RGMII), this clock is derived from the + PHY's RX clock output. In other configurations, other clocks (such as + rx_125, rmii) may drive the EQOS RX path. + In cases where the PHY clock is directly fed into the EQOS receive path + without intervening logic, the DT need not represent this clock, since it + is assumed to be fully under the control of the PHY device/driver. In + cases where SoC integration adds additional logic to this path, such as a + SW-controlled clock gate, this clock should be represented in DT. + - "slave_bus" + The CPU/slave-bus (CSR) interface clock. This applies to any bus type; + APB, AHB, AXI, etc. The HW signal name is hclk_i (AHB) or clk_csr_i (other + buses). + - "master_bus" + The master bus interface clock. Only required in configurations that use a + separate clock for the master and slave bus interfaces. The HW signal name + is hclk_i (AHB) or aclk_i (AXI). + - "ptp_ref" + The PTP reference clock. The HW signal name is clk_ptp_ref_i. + - "phy_ref_clk" + This clock is deprecated and should not be used by new compatible values. + It is equivalent to "tx". + - "apb_pclk" + This clock is deprecated and should not be used by new compatible values. + It is equivalent to "slave_bus". + + Note: Support for additional IP configurations may require adding the + following clocks to this list in the future: clk_rx_125_i, clk_tx_125_i, + clk_pmarx_0_i, clk_pmarx1_i, clk_rmii_i, clk_revmii_rx_i, clk_revmii_tx_i. + Configurations exist where multiple similar clocks are used at once, e.g. all + of clk_rx_125_i, clk_pmarx_0_i, clk_pmarx1_i. For this reason it is best to + extend the binding with a separate clock-names entry for each of those RX + clocks, rather than repurposing the existing "rx" clock-names entry as a + generic/logical clock in a similar fashion to "master_bus" and "slave_bus". + This will allow easy support for configurations that support multiple PHY + interfaces using a mux, and hence need to have explicit control over + specific RX clocks. + + The following compatible values require the following set of clocks: + - "nvidia,tegra186-eqos", "snps,dwc-qos-ethernet-4.10": + - "slave_bus" + - "master_bus" + - "rx" + - "tx" + - "ptp_ref" + - "axis,artpec6-eqos", "snps,dwc-qos-ethernet-4.10": + - "slave_bus" + - "master_bus" + - "tx" + - "ptp_ref" + - "snps,dwc-qos-ethernet-4.10" (deprecated): + - "phy_ref_clk" + - "apb_clk" - interrupt-parent: Should be the phandle for the interrupt controller that services interrupts for this device - interrupts: Should contain the core's combined interrupt signal - phy-mode: See ethernet.txt file in the same directory +- resets: Phandle and reset specifiers for each entry in reset-names, in the + same order. See ../reset/reset.txt. +- reset-names: May contain any/all of the following depending on the IP + configuration, in any order: + - "eqos". The reset to the entire module. The HW signal name is hreset_n + (AHB) or aresetn_i (AXI). + + The following compatible values require the following set of resets: + (the reset properties may be omitted if empty) + - "nvidia,tegra186-eqos", "snps,dwc-qos-ethernet-4.10": + - "eqos". + - "axis,artpec6-eqos", "snps,dwc-qos-ethernet-4.10": + - None. + - "snps,dwc-qos-ethernet-4.10" (deprecated): + - None. Optional properties: - dma-coherent: Present if dma operations are coherent - mac-address: See ethernet.txt in the same directory - local-mac-address: See ethernet.txt in the same directory +- phy-reset-gpios: Phandle and specifier for any GPIO used to reset the PHY. + See ../gpio/gpio.txt. - snps,en-lpi: If present it enables use of the AXI low-power interface - snps,write-requests: Number of write requests that the AXI port can issue. It depends on the SoC configuration. @@ -52,6 +142,7 @@ ethernet2@40010000 { reg = <0x40010000 0x4000>; phy-handle = <&phy2>; phy-mode = "gmii"; + phy-reset-gpios = <&gpioctlr 43 GPIO_ACTIVE_LOW>; snps,en-tx-lpi-clockgating; snps,en-lpi; -- cgit v1.2.3