diff options
Diffstat (limited to 'Documentation/devicetree/bindings/mmc/sdhci-msm.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/mmc/sdhci-msm.txt | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt new file mode 100644 index 000000000..502b3b851 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt @@ -0,0 +1,63 @@ +* 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-v4" for sdcc versions less than 5.0 + "qcom,sdhci-msm-v5" for sdcc versions >= 5.0 + For SDCC version 5.0.0, MCI registers are removed from SDCC + interface and some registers are moved to HC. New compatible + string is added to support this change - "qcom,sdhci-msm-v5". +- reg: Base address and length of the register in the following order: + - Host controller register map (required) + - SD Core register map (required) +- interrupts: Should contain an interrupt-specifiers for the interrupts: + - Host controller interrupt (required) +- 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) + "xo" - TCXO clock (optional) + "cal" - reference clock for RCLK delay calibration (optional) + "sleep" - sleep clock for RCLK delay calibration (optional) + +Example: + + sdhc_1: sdhci@f9824900 { + compatible = "qcom,sdhci-msm-v4"; + reg = <0xf9824900 0x11c>, <0xf9824000 0x800>; + interrupts = <0 123 0>; + bus-width = <8>; + non-removable; + + vmmc-supply = <&pm8941_l20>; + vqmmc-supply = <&pm8941_s3>; + + 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-v4"; + reg = <0xf98a4900 0x11c>, <0xf98a4000 0x800>; + interrupts = <0 125 0>; + bus-width = <4>; + cd-gpios = <&msmgpio 62 0x1>; + + vmmc-supply = <&pm8941_l21>; + vqmmc-supply = <&pm8941_l13>; + + 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"; + }; |