recipes-kernel: linux: Disable UHS speed modes on MMCSD1 instance

Instabilities were observed on few SD cards when UHS speed modes were
enabled. Therefore, disable UHS modes by adding the tag no-1-8-v tag,
n sdhci1 device tree node.

Signed-off-by: Devarsh Thakkar <devarsht@ti.com>

3 files changed, 45 insertions, 0 deletions

diff --git a/recipes-kernel/linux/files/0001-arm64-dts-ti-k3-am62-main-Disable-UHS-speed-modes-on.patch b/recipes-kernel/linux/files/0001-arm64-dts-ti-k3-am62-main-Disable-UHS-speed-modes-on.patch
new file mode 100644
index 0000000..aa4873c
--- /dev/null
+++ b/recipes-kernel/linux/files/0001-arm64-dts-ti-k3-am62-main-Disable-UHS-speed-modes-on.patch
@@ -0,0 +1,39 @@
+From 7e55a3e8ec27314ba009fff7240c3604e8fa917a Mon Sep 17 00:00:00 2001
+From: Aswath Govindraju <a-govindraju@ti.com>
+Date: Fri, 20 May 2022 18:49:16 +0530
+Subject: [tiL5.10-CON PATCH v2] arm64: dts: ti: k3-am62-main: Disable UHS
+ speed modes on MMCSD1 instance
+
+Instabilities were observed on a few SD cards when UHS speed modes were
+enabled. Therefore, disable UHS modes by adding the tag no-1-8-v tag, in
+sdhci1 device tree node.
+
+Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
+---
+
+changes since v1:
+- Dropped cover letter
+- Moved the tag to main dtsi, so that the changes gets applied
+  across all dts files
+
+link to v1:
+- https://serenity.dal.design.ti.com/patchwork/project/linux-patch-review/list/?series=2340
+
+ arch/arm64/boot/dts/ti/k3-am62-main.dtsi | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
+index 7bbfcb158842..46bc1adb3fa1 100644
+--- a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
++++ b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
+@@ -425,6 +425,7 @@
+                ti,itap-del-sel-sdr25 = <0x0>;
+                ti,clkbuf-sel = <0x7>;
+                bus-width = <4>;
++               no-1-8-v;
+        };
+ 
+        sdhci2: mmc@fa20000 {
+-- 
+2.17.1
+
diff --git a/recipes-kernel/linux/linux-ti-staging-rt_5.10.bbappend b/recipes-kernel/linux/linux-ti-staging-rt_5.10.bbappend
index ca26186..63df743 100644
--- a/recipes-kernel/linux/linux-ti-staging-rt_5.10.bbappend
+++ b/recipes-kernel/linux/linux-ti-staging-rt_5.10.bbappend
@@ -6,3 +6,6 @@ SRC_URI_append_am64xx-evm = " \
     file://0001-arm64-dts-k3-am642-sk-Enable-WLAN-connected-to-SDHCI.patch \
     file://0001-arm64-dts-k3-am642-sk-Enable-LEDs-connected-to-tpic2.patch \
 "
+SRC_URI_append_am62xx-evm = " \
+    file://0001-arm64-dts-ti-k3-am62-main-Disable-UHS-speed-modes-on.patch \
+"
diff --git a/recipes-kernel/linux/linux-ti-staging_5.10.bbappend b/recipes-kernel/linux/linux-ti-staging_5.10.bbappend
index ca26186..63df743 100644
--- a/recipes-kernel/linux/linux-ti-staging_5.10.bbappend
+++ b/recipes-kernel/linux/linux-ti-staging_5.10.bbappend
@@ -6,3 +6,6 @@ SRC_URI_append_am64xx-evm = " \
     file://0001-arm64-dts-k3-am642-sk-Enable-WLAN-connected-to-SDHCI.patch \
     file://0001-arm64-dts-k3-am642-sk-Enable-LEDs-connected-to-tpic2.patch \
 "
+SRC_URI_append_am62xx-evm = " \
+    file://0001-arm64-dts-ti-k3-am62-main-Disable-UHS-speed-modes-on.patch \
+"