[PATCH v3 06/10] mmc: sunxi: Add support for A83T eMMC (MMC2)
From: Chen-Yu Tsai <hidden>
Date: 2017-07-24 14:01:39
Also in:
linux-clk, linux-devicetree, linux-mmc, lkml
Subsystem:
multimedia card (mmc), secure digital (sd) and sdio subsystem, open firmware and flattened device tree bindings, the rest · Maintainers:
Ulf Hansson, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
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: Chen-Yu Tsai <redacted> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Maxime Ripard <redacted> --- Documentation/devicetree/bindings/mmc/sunxi-mmc.txt | 1 + drivers/mmc/host/sunxi-mmc.c | 8 ++++++++ 2 files changed, 9 insertions(+)
diff --git a/Documentation/devicetree/bindings/mmc/sunxi-mmc.txt b/Documentation/devicetree/bindings/mmc/sunxi-mmc.txt
index 7d53a799f140..63b57e2a10fb 100644
--- a/Documentation/devicetree/bindings/mmc/sunxi-mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/sunxi-mmc.txt@@ -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"
diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c
index 11587a69a1fd..de187ed77040 100644
--- a/drivers/mmc/host/sunxi-mmc.c
+++ b/drivers/mmc/host/sunxi-mmc.c@@ -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 },
--
2.13.3