From 275173b225ae663e54d8dc5c93d79265aad19f89 Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Tue, 23 Aug 2011 12:15:33 -0600 Subject: mmc: sdhci-tegra: Add Device Tree probing support Add hooks to read gpio configuration out of the device tree node. [grant.likely: Rewrite of original patch from John Bonesio] Signed-off-by: Grant Likely [swarren: Fixed tegra_sdhci_get_ro() to retrieve pdata correctly] [swarren: Reworked to avoid #ifdef CONFIG_OF] [swarren: Reworked binding based on fsl-imx-esdhc.txt] [swarren: Documented binding] Signed-off-by: Stephen Warren Signed-off-by: Chris Ball --- .../devicetree/bindings/mmc/nvidia-sdhci.txt | 25 ++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt (limited to 'Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt') diff --git a/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt b/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt new file mode 100644 index 000000000000..c87f66782726 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt @@ -0,0 +1,25 @@ +* NVIDIA Tegra Secure Digital Host Controller + +This controller on Tegra family SoCs provides an interface for MMC, SD, +and SDIO types of memory cards. + +Required properties: +- compatible : Should be "nvidia,-sdhci" +- reg : Should contain eSDHC registers location and length +- interrupts : Should contain eSDHC interrupt + +Optional properties: +- cd-gpios : Specify GPIOs for card detection +- wp-gpios : Specify GPIOs for write protection +- power-gpios : Specify GPIOs for power control + +Example: + +sdhci@c8000200 { + compatible = "nvidia,tegra20-sdhci"; + reg = <0xc8000200 0x200>; + interrupts = <47>; + cd-gpios = <&gpio 69 0>; /* gpio PI5 */ + wp-gpios = <&gpio 57 0>; /* gpio PH1 */ + power-gpios = <&gpio 155 0>; /* gpio PT3 */ +}; -- cgit v1.2.3 From 55cd65e48b62c6f08edbb93d5cadf96e876ebcc2 Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Tue, 30 Aug 2011 13:17:16 -0600 Subject: mmc: sdhci-tegra: Add 8-bit support to device tree binding. The previous patch which implemented a DT binding for sdhci-tegra did not allow all platform data fields to be initialized from DT. The following were missing: is_8bit: Implemented by this patch. pm_flags: Not implemented yet. There are no mainline users of this field. I'm not quite sure what it's for, and hence how to represent this in DT; the value ends up being assigned to host->mmc->pm_caps. While we're at it, fix the binding documentation to refer to "SD/MMC" instead of "eSDHC", since that's the correct name; "eSDHC" was cut/paste from the Freescale binding docs. Signed-off-by: Stephen Warren Signed-off-by: Chris Ball --- Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt') diff --git a/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt b/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt index c87f66782726..7e51154679a6 100644 --- a/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt +++ b/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt @@ -5,13 +5,14 @@ and SDIO types of memory cards. Required properties: - compatible : Should be "nvidia,-sdhci" -- reg : Should contain eSDHC registers location and length -- interrupts : Should contain eSDHC interrupt +- reg : Should contain SD/MMC registers location and length +- interrupts : Should contain SD/MMC interrupt Optional properties: - cd-gpios : Specify GPIOs for card detection - wp-gpios : Specify GPIOs for write protection - power-gpios : Specify GPIOs for power control +- support-8bit : Boolean, indicates if 8-bit mode should be used. Example: @@ -22,4 +23,5 @@ sdhci@c8000200 { cd-gpios = <&gpio 69 0>; /* gpio PI5 */ wp-gpios = <&gpio 57 0>; /* gpio PH1 */ power-gpios = <&gpio 155 0>; /* gpio PT3 */ + support-8bit; }; -- cgit v1.2.3