[PATCH] ARM: dts: imx7s-warp: Pass 'no-1-8-v' property to the eMMC

[PATCH] ARM: dts: imx7s-warp: Pass 'no-1-8-v' property to the eMMC

[Fabio Estevam]

Currently the following eMMC error is seen:

mmc1: mmc_select_hs200 failed, error -74
mmc1: new MMC card at address 0001
mmcblk1: mmc1:0001 V10008 7.05 GiB
mmcblk1boot0: mmc1:0001 V10008 partition 1 4.00 MiB
mmcblk1boot1: mmc1:0001 V10008 partition 2 4.00 MiB
mmcblk1rpmb: mmc1:0001 V10008 partition 3 4.00 MiB

On imx7s-warp the eMMC VCCQ is fixed at 3.15V, so pass the 'no-1-8-v'
property to properly describe that 1.8V operation is not possible.

With this change HS200 error is gone and another benefit is that the
card can operate in DDR52 mode now:

mmc1: new DDR MMC card at address 0001
mmcblk1: mmc1:0001 V10008 7.05 GiB
mmcblk1boot0: mmc1:0001 V10008 partition 1 4.00 MiB
mmcblk1boot1: mmc1:0001 V10008 partition 2 4.00 MiB
mmcblk1rpmb: mmc1:0001 V10008 partition 3 4.00 MiB

Suggested-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
---
 arch/arm/boot/dts/imx7s-warp.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/imx7s-warp.dts b/arch/arm/boot/dts/imx7s-warp.dts
index d5237fd..8dfed85 100644
--- a/arch/arm/boot/dts/imx7s-warp.dts
+++ b/arch/arm/boot/dts/imx7s-warp.dts
@@ -295,6 +295,7 @@
 	assigned-clocks = <&clks IMX7D_USDHC3_ROOT_CLK>;
 	assigned-clock-rates = <400000000>;
 	bus-width = <8>;
+	no-1-8-v;
 	fsl,tuning-step = <2>;
 	non-removable;
 	status = "okay";
-- 
2.7.4

[PATCH] ARM: dts: imx7s-warp: Pass 'no-1-8-v' property to the eMMC

[Shawn Guo]

On Wed, May 17, 2017 at 03:55:25PM -0300, Fabio Estevam wrote:
> Currently the following eMMC error is seen:
> 
> mmc1: mmc_select_hs200 failed, error -74
> mmc1: new MMC card at address 0001
> mmcblk1: mmc1:0001 V10008 7.05 GiB
> mmcblk1boot0: mmc1:0001 V10008 partition 1 4.00 MiB
> mmcblk1boot1: mmc1:0001 V10008 partition 2 4.00 MiB
> mmcblk1rpmb: mmc1:0001 V10008 partition 3 4.00 MiB
> 
> On imx7s-warp the eMMC VCCQ is fixed at 3.15V, so pass the 'no-1-8-v'
> property to properly describe that 1.8V operation is not possible.
> 
> With this change HS200 error is gone and another benefit is that the
> card can operate in DDR52 mode now:
> 
> mmc1: new DDR MMC card at address 0001
> mmcblk1: mmc1:0001 V10008 7.05 GiB
> mmcblk1boot0: mmc1:0001 V10008 partition 1 4.00 MiB
> mmcblk1boot1: mmc1:0001 V10008 partition 2 4.00 MiB
> mmcblk1rpmb: mmc1:0001 V10008 partition 3 4.00 MiB
> 
> Suggested-by: Stefan Agner <stefan@agner.ch>
> Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>

Applied, thanks.