Commit ac98caef authored by Chen-Yu Tsai's avatar Chen-Yu Tsai Committed by Ulf Hansson
Browse files

mmc: sunxi: Add support for A83T eMMC (MMC2) 



The third MMC controller (MMC2) on the Allwinner A83T SoC is slightly
different. It supports a wider 8-bit bus, has a dedicated controllable
reset pin for eMMC, and a "new timing mode" which is supposed to deliver
better signals and thus better performance.

Add a compatible for this one to use the new timing mode not found in the
other controllers.

Signed-off-by: default avatarChen-Yu Tsai <wens@csie.org>
Acked-by: default avatarRob Herring <robh@kernel.org>
Acked-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent c903a2ae

Documentation/devicetree/bindings/mmc/sunxi-mmc.txt

+1 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ Required properties: 
   * "allwinner,sun4i-a10-mmc"

   * "allwinner,sun5i-a13-mmc"

   * "allwinner,sun7i-a20-mmc"

   * "allwinner,sun8i-a83t-emmc"

   * "allwinner,sun9i-a80-mmc"

   * "allwinner,sun50i-a64-emmc"

   * "allwinner,sun50i-a64-mmc"

drivers/mmc/host/sunxi-mmc.c

+8 −0
Original line number Diff line number Diff line
@@ -1117,6 +1117,13 @@ static const struct sunxi_mmc_cfg sun7i_a20_cfg = { 
	.can_calibrate = false,

};



static const struct sunxi_mmc_cfg sun8i_a83t_emmc_cfg = {

	.idma_des_size_bits = 16,

	.clk_delays = sunxi_mmc_clk_delays,

	.can_calibrate = false,

	.has_timings_switch = true,

};



static const struct sunxi_mmc_cfg sun9i_a80_cfg = {

	.idma_des_size_bits = 16,

	.clk_delays = sun9i_mmc_clk_delays,
@@ -1141,6 +1148,7 @@ static const struct of_device_id sunxi_mmc_of_match[] = { 
	{ .compatible = "allwinner,sun4i-a10-mmc", .data = &sun4i_a10_cfg },

	{ .compatible = "allwinner,sun5i-a13-mmc", .data = &sun5i_a13_cfg },

	{ .compatible = "allwinner,sun7i-a20-mmc", .data = &sun7i_a20_cfg },

	{ .compatible = "allwinner,sun8i-a83t-emmc", .data = &sun8i_a83t_emmc_cfg },

	{ .compatible = "allwinner,sun9i-a80-mmc", .data = &sun9i_a80_cfg },

	{ .compatible = "allwinner,sun50i-a64-mmc", .data = &sun50i_a64_cfg },

	{ .compatible = "allwinner,sun50i-a64-emmc", .data = &sun50i_a64_emmc_cfg },

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