From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chen-Yu Tsai Subject: [PATCH 07/11] mmc: sunxi: Add support for A83T eMMC (MMC2) Date: Fri, 14 Jul 2017 14:42:58 +0800 Message-ID: <20170714064302.20383-8-wens@csie.org> References: <20170714064302.20383-1-wens@csie.org> Reply-To: wens-jdAy2FN1RRM@public.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Return-path: Sender: linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org In-Reply-To: <20170714064302.20383-1-wens-jdAy2FN1RRM@public.gmane.org> List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , To: Maxime Ripard , Ulf Hansson , Michael Turquette , Stephen Boyd , Rob Herring , Mark Rutland Cc: Chen-Yu Tsai , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-mmc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-clk-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org List-Id: devicetree@vger.kernel.org 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 --- 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 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 }, -- 2.13.2