| Message ID | 20170714064302.20383-8-wens@csie.org |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On Fri, Jul 14, 2017 at 02:42:58PM +0800, Chen-Yu Tsai wrote: > 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 <wens@csie.org> > --- > Documentation/devicetree/bindings/mmc/sunxi-mmc.txt | 1 + Acked-by: Rob Herring <robh@kernel.org> > drivers/mmc/host/sunxi-mmc.c | 8 ++++++++ > 2 files changed, 9 insertions(+) -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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 7b6f5f49620e..e70065dbd50e 100644 --- a/drivers/mmc/host/sunxi-mmc.c +++ b/drivers/mmc/host/sunxi-mmc.c @@ -1113,6 +1113,13 @@ 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_new_timings = true, +}; + static const struct sunxi_mmc_cfg sun9i_a80_cfg = { .idma_des_size_bits = 16, .clk_delays = sun9i_mmc_clk_delays, @@ -1137,6 +1144,7 @@ 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 },
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 <wens@csie.org> --- Documentation/devicetree/bindings/mmc/sunxi-mmc.txt | 1 + drivers/mmc/host/sunxi-mmc.c | 8 ++++++++ 2 files changed, 9 insertions(+)