diff mbox series

[v3] ARM: dts: imx: Set default tuning step for imx7d usdhc

Message ID 20230724154510.2532561-1-xiaolei.wang@windriver.com
State Accepted
Commit be18293e47cbca7c6acee9231fc851601d69563a
Headers show
Series [v3] ARM: dts: imx: Set default tuning step for imx7d usdhc | expand

Commit Message

Xiaolei Wang July 24, 2023, 3:45 p.m. UTC 
If the tuning step is not set, the tuning step is set to 1.
For some sd cards, the following Tuning timeout will occur.

Tuning failed, falling back to fixed sampling clock
mmc0: Tuning failed, falling back to fixed sampling clock

So set the default tuning step. This refers to the NXP vendor's
commit below:

https://github.com/nxp-imx/linux-imx/blob/lf-6.1.y/
arch/arm/boot/dts/imx7s.dtsi#L1216-L1217

Fixes: 1e336aa0c025 ("mmc: sdhci-esdhc-imx: correct the tuning start tap and step setting")
Signed-off-by: Xiaolei Wang <xiaolei.wang@windriver.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
---

v3:
  * Add the timeout message to commit log

v2:
  * Refer to https://github.com/nxp-imx/linux-imx/blob/lf-6.1.y/arch/arm/boot/dts/imx7s.dtsi#L1216-L1217
    and add the following attributes for all usdhc of imx7:
      fsl,tuning-step = <2>;
      fsl,tuning-start-tap = <20>;

 arch/arm/boot/dts/nxp/imx/imx7s.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm/boot/dts/nxp/imx/imx7s.dtsi b/arch/arm/boot/dts/nxp/imx/imx7s.dtsi
index 54026c2c93fa..6ffb428dc939 100644
--- a/arch/arm/boot/dts/nxp/imx/imx7s.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx7s.dtsi
@@ -1184,6 +1184,8 @@  usdhc1: mmc@30b40000 {
 					<&clks IMX7D_USDHC1_ROOT_CLK>;
 				clock-names = "ipg", "ahb", "per";
 				bus-width = <4>;
+				fsl,tuning-step = <2>;
+				fsl,tuning-start-tap = <20>;
 				status = "disabled";
 			};
 
@@ -1196,6 +1198,8 @@  usdhc2: mmc@30b50000 {
 					<&clks IMX7D_USDHC2_ROOT_CLK>;
 				clock-names = "ipg", "ahb", "per";
 				bus-width = <4>;
+				fsl,tuning-step = <2>;
+				fsl,tuning-start-tap = <20>;
 				status = "disabled";
 			};
 
@@ -1208,6 +1212,8 @@  usdhc3: mmc@30b60000 {
 					<&clks IMX7D_USDHC3_ROOT_CLK>;
 				clock-names = "ipg", "ahb", "per";
 				bus-width = <4>;
+				fsl,tuning-step = <2>;
+				fsl,tuning-start-tap = <20>;
 				status = "disabled";
 			};