arm64: dts: qcom: sc7180: Use maximum drive strength values for eMMC
authorShaik Sajida Bhanu <sbhanu@codeaurora.org>
Mon, 16 Aug 2021 16:50:50 +0000 (22:20 +0530)
committerBjorn Andersson <bjorn.andersson@linaro.org>
Thu, 23 Sep 2021 20:26:38 +0000 (15:26 -0500)
The current drive strength values are not sufficient on non discrete
boards and this leads to CRC errors during switching to HS400 enhanced
strobe mode.

Hardware simulation results on non discrete boards shows up that use the
maximum drive strength values for data and command lines could helps
in avoiding these CRC errors.

So, update data and command line drive strength values to maximum.

Signed-off-by: Shaik Sajida Bhanu <sbhanu@codeaurora.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1629132650-26277-1-git-send-email-sbhanu@codeaurora.org
arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi

index 6a216e17b96a42d66c32cebd38d6e6af532ae2be..8685931553b37fc0b74254697fb859eb44a1783f 100644 (file)
@@ -1513,13 +1513,13 @@ ap_spi_fp: &spi10 {
                pinconf-cmd {
                        pins = "sdc1_cmd";
                        bias-pull-up;
-                       drive-strength = <10>;
+                       drive-strength = <16>;
                };
 
                pinconf-data {
                        pins = "sdc1_data";
                        bias-pull-up;
-                       drive-strength = <10>;
+                       drive-strength = <16>;
                };
 
                pinconf-rclk {