This patch adds the device-tree binding documentation for Qualcomm SDHCI driver. It contains the differences between the core properties in mmc.txt and the properties used by the sdhci-msm driver. Signed-off-by: Georgi Djakov <gdjakov@xxxxxxxxxx> --- .../devicetree/bindings/mmc/sdhci-msm.txt | 83 ++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 Documentation/devicetree/bindings/mmc/sdhci-msm.txt diff --git a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt new file mode 100644 index 0000000..c26d335 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt @@ -0,0 +1,83 @@ +* Qualcomm SDHCI controller (sdhci-msm) + +This file documents differences between the core properties in mmc.txt +and the properties used by the sdhci-msm driver. + +Required properties: +- compatible: Should contain "qcom,sdhci-msm". +- reg: Base address and length of the register set listed in reg-names. +- reg-names: Should contain the following: + "hc_mem" - Host controller register map + "core_mem" - SD Core register map +- interrupts: Should contain an interrupt-specifiers for the interrupts listed in interrupt-names. +- interrupt-names: Should contain the following: + "hc_irq" - Host controller interrupt + "pwr_irq" - PMIC interrupt +- vdd-supply: Phandle to the regulator for the vdd (core voltage) supply. +- vdd-io-supply: Phandle to the regulator for the vdd-io (i/o voltage) supply. +- pinctrl-names: Should contain only one value - "default". +- pinctrl-0: Should specify pin control groups used for this controller. +- clocks: A list of phandle + clock-specifier pairs for the clocks listed in clock-names. +- clock-names: Should contain the following: + "iface" - Main peripheral bus clock (PCLK/HCLK - AHB Bus clock) (required) + "core" - SDC MMC clock (MCLK) (required) + "bus" - SDCC bus voter clock (optional) + +Optional properties: + +- qcom,vdd-voltage-min - Specifies the minimum core voltage supported by the device in microvolts. +- qcom,vdd-voltage-max - Specifies the maximum core voltage supported by the device in microvolts. +- qcom,vdd-io-voltage-min - Specifies the minimum i/o voltage supported by the device in microvolts. +- qcom,vdd-io-voltage-max - Specifies the maximum i/o voltage supported by the device in microvolts. + +Example: + + sdhc_1: sdhci@f9824900 { + compatible = "qcom,sdhci-msm"; + reg = <0xf9824900 0x11c>, <0xf9824000 0x800>; + reg-names = "hc_mem", "core_mem"; + interrupts = <0 123 0>, <0 138 0>; + interrupt-names = "hc_irq", "pwr_irq"; + bus-width = <8>; + non-removable; + + vdd-supply = <&pm8941_l20>; + vdd-io-supply = <&pm8941_s3>; + + qcom,vdd-voltage-min = <2950000>; + qcom,vdd-voltage-max = <2950000>; + qcom,vdd-io-voltage-min = <1800000>; + qcom,vdd-io-voltage-max = <1800000>; + + pinctrl-names = "default"; + pinctrl-0 = <&sdc1_clk &sdc1_cmd &sdc1_data>; + + clocks = <&gcc GCC_SDCC1_APPS_CLK>, <&gcc GCC_SDCC1_AHB_CLK>; + clock-names = "core", "iface"; + }; + + sdhc_2: sdhci@f98a4900 { + compatible = "qcom,sdhci-msm"; + reg = <0xf98a4900 0x11c>, <0xf98a4000 0x800>; + reg-names = "hc_mem", "core_mem"; + interrupts = <0 1 2>; + #interrupt-cells = <1>; + interrupt-map = <0 &intc 0 125 0 + 1 &intc 0 221 0>; + interrupt-names = "hc_irq", "pwr_irq"; + bus-width = <4>; + + vdd-supply = <&pm8941_l21>; + vdd-io-supply = <&pm8941_l13>; + + qcom,vdd-voltage-min = <2950000>; + qcom,vdd-voltage-max = <2950000>; + qcom,vdd-io-voltage-min = <1800000>; + qcom,vdd-io-voltage-max = <2950000>; + + pinctrl-names = "default"; + pinctrl-0 = <&sdc2_clk &sdc2_cmd &sdc2_data>; + + clocks = <&gcc GCC_SDCC2_APPS_CLK>, <&gcc GCC_SDCC2_AHB_CLK>; + clock-names = "core", "iface"; + }; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html