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Commit 296759c9 authored by Wadim Egorov's avatar Wadim Egorov Committed by Heiko Stuebner
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ARM: dts: rockchip: Bump sd card pin drive strength up on firefly boards 



It seems some firefly boards need 12mA drive strength for sdmmc.
Using 4mA/8mA drive strength will cause the kernel to fail to recognize
the sd card correctly.
Increased the sdmmc lines drive strength from 4mA to 12mA.

Signed-off-by: default avatarWadim Egorov <w.egorov@phytec.de>
Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
parent b662f6d0

arch/arm/boot/dts/rk3288-firefly.dtsi

+24 −0
Original line number Diff line number Diff line
@@ -408,6 +408,11 @@ 
		output-low;

	};



	pcfg_pull_up_drv_12ma: pcfg-pull-up-drv-12ma {

		bias-pull-up;

		drive-strength = <12>;

	};



	act8846 {

		pwr_hold: pwr-hold {

			rockchip,pins = <0 1 RK_FUNC_GPIO &pcfg_output_high>;
@@ -457,6 +462,25 @@ 
	};



	sdmmc {

		/*

		 * Default drive strength isn't enough to achieve even

		 * high-speed mode on firefly board so bump up to 12ma.

		 */

		sdmmc_bus4: sdmmc-bus4 {

			rockchip,pins = <6 16 RK_FUNC_1 &pcfg_pull_up_drv_12ma>,

					<6 17 RK_FUNC_1 &pcfg_pull_up_drv_12ma>,

					<6 18 RK_FUNC_1 &pcfg_pull_up_drv_12ma>,

					<6 19 RK_FUNC_1 &pcfg_pull_up_drv_12ma>;

		};



		sdmmc_clk: sdmmc-clk {

			rockchip,pins = <6 20 RK_FUNC_1 &pcfg_pull_none_12ma>;

		};



		sdmmc_cmd: sdmmc-cmd {

			rockchip,pins = <6 21 RK_FUNC_1 &pcfg_pull_up_drv_12ma>;

		};



		sdmmc_pwr: sdmmc-pwr {

			rockchip,pins = <7 11 RK_FUNC_GPIO &pcfg_pull_none>;

		};