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Commit 4d7c07cd authored by Andrew Bresticker's avatar Andrew Bresticker Committed by Ulf Hansson
Browse files

mmc: dw_mmc: Add support for IMG Pistachio 



Add support for the DW MMC host found on the Imagination Pistachio SoC.
Like the DW MMC hosts found on SOCFPGA and Rockchip SoCs, the DW MMC
host on Pistachio requires the use of SDMMC_CMD_USE_HOLD_REG.

Signed-off-by: default avatarAndrew Bresticker <abrestic@chromium.org>
Reviewed-by: default avatarDoug Anderson <dianders@chromium.org>
Acked-by: default avatarJaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent d1355290

Documentation/devicetree/bindings/mmc/img-dw-mshc.txt

0 → 100644
+29 −0
Original line number Diff line number Diff line 
* Imagination specific extensions to the Synopsys Designware Mobile Storage

  Host Controller



The Synopsys designware mobile storage host controller is used to interface

a SoC with storage medium such as eMMC or SD/MMC cards. This file documents

differences between the core Synopsys dw mshc controller properties described

by synopsys-dw-mshc.txt and the properties used by the Imagination specific

extensions to the Synopsys Designware Mobile Storage Host Controller.



Required Properties:



* compatible: should be

	- "img,pistachio-dw-mshc": for Pistachio SoCs



Example:



	mmc@18142000 {

		compatible = "img,pistachio-dw-mshc";

		reg = <0x18142000 0x400>;

		interrupts = <GIC_SHARED 39 IRQ_TYPE_LEVEL_HIGH>;



		clocks = <&system_clk>, <&sdhost_clk>;

		clock-names = "biu", "ciu";



		fifo-depth = <0x20>;

		bus-width = <4>;

		num-slots = <1>;

		disable-wp;

	};

drivers/mmc/host/dw_mmc-pltfm.c

+6 −0
Original line number Diff line number Diff line
@@ -35,6 +35,10 @@ static const struct dw_mci_drv_data socfpga_drv_data = { 
	.prepare_command	= dw_mci_pltfm_prepare_command,

};



static const struct dw_mci_drv_data pistachio_drv_data = {

	.prepare_command	= dw_mci_pltfm_prepare_command,

};



int dw_mci_pltfm_register(struct platform_device *pdev,

			  const struct dw_mci_drv_data *drv_data)

{
@@ -90,6 +94,8 @@ static const struct of_device_id dw_mci_pltfm_match[] = { 
	{ .compatible = "snps,dw-mshc", },

	{ .compatible = "altr,socfpga-dw-mshc",

		.data = &socfpga_drv_data },

	{ .compatible = "img,pistachio-dw-mshc",

		.data = &pistachio_drv_data },

	{},

};

MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);