linux-kernel - [PATCH 4/7] arm64: dts: ti: iot2050: Refactor the m.2 and minipcie power pin

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Message-Id: <ccac993e604b912bb8472f08f5fd43c528c7973b.1698413678.git.jan.kiszka@siemens.com>
Date:   Fri, 27 Oct 2023 15:34:35 +0200
From:   Jan Kiszka <jan.kiszka@...mens.com>
To:     Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>,
        Tero Kristo <kristo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Bao Cheng Su <baocheng.su@...mens.com>,
        Benedikt Niedermayr <benedikt.niedermayr@...mens.com>
Subject: [PATCH 4/7] arm64: dts: ti: iot2050: Refactor the m.2 and minipcie power pin

From: Su Bao Cheng <baocheng.su@...mens.com>

Make the m.2 power control pin also available on miniPCIE variants.

This can fix some miniPCIE card hang issue, by forcing a power on reset
during boot.

Signed-off-by: Baocheng Su <baocheng.su@...mens.com>
---
 .../arm64/boot/dts/ti/k3-am65-iot2050-common-pg2.dtsi |  4 +++-
 arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi    | 11 +++++++++++
 .../boot/dts/ti/k3-am6548-iot2050-advanced-m2.dts     |  8 +-------
 3 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am65-iot2050-common-pg2.dtsi b/arch/arm64/boot/dts/ti/k3-am65-iot2050-common-pg2.dtsi
index e9419c4fe605..e9b57b87e42e 100644
--- a/arch/arm64/boot/dts/ti/k3-am65-iot2050-common-pg2.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65-iot2050-common-pg2.dtsi
@@ -20,7 +20,9 @@ AM65X_IOPAD(0x01e0, PIN_OUTPUT, 7)
 
 &main_gpio1 {
 	pinctrl-names = "default";
-	pinctrl-0 = <&cp2102n_reset_pin_default>;
+	pinctrl-0 =
+		<&main_pcie_enable_pins_default>,
+		<&cp2102n_reset_pin_default>;
 	gpio-line-names =
 		"", "", "", "", "", "", "", "", "", "",
 		"", "", "", "", "", "", "", "", "", "",
diff --git a/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi b/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi
index 74c4accff4b7..53bd296ba310 100644
--- a/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi
@@ -852,6 +852,12 @@ AM65X_IOPAD(0x00CC, PIN_INPUT_PULLDOWN, 7)
 		>;
 	};
 
+	main_pcie_enable_pins_default: main-pcie-enable-default-pins {
+		pinctrl-single,pins = <
+			AM65X_IOPAD(0x01c4, PIN_INPUT_PULLUP, 7)  /* (AH13) GPIO1_17 */
+		>;
+	};
+
 	main_uart1_pins_default: main-uart1-default-pins {
 		pinctrl-single,pins = <
 			AM65X_IOPAD(0x0174, PIN_INPUT,  6)  /* (AE23) UART1_RXD */
@@ -981,6 +987,11 @@ &main_gpio0 {
 		"", "IO9";
 };
 
+&main_gpio1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_pcie_enable_pins_default>;
+};
+
 &wkup_gpio0 {
 	pinctrl-names = "default";
 	pinctrl-0 =
diff --git a/arch/arm64/boot/dts/ti/k3-am6548-iot2050-advanced-m2.dts b/arch/arm64/boot/dts/ti/k3-am6548-iot2050-advanced-m2.dts
index 8301c35c31b3..bd6f2e696e94 100644
--- a/arch/arm64/boot/dts/ti/k3-am6548-iot2050-advanced-m2.dts
+++ b/arch/arm64/boot/dts/ti/k3-am6548-iot2050-advanced-m2.dts
@@ -27,12 +27,6 @@ &mcu_r5fss0 {
 };
 
 &main_pmx0 {
-	main_m2_enable_pins_default: main-m2-enable-default-pins {
-		pinctrl-single,pins = <
-			AM65X_IOPAD(0x01c4, PIN_INPUT_PULLUP, 7)  /* (AH13) GPIO1_17 */
-		>;
-	};
-
 	main_bkey_pcie_reset: main-bkey-pcie-reset-default-pins {
 		pinctrl-single,pins = <
 			AM65X_IOPAD(0x01bc, PIN_OUTPUT_PULLUP, 7)  /* (AG13) GPIO1_15 */
@@ -72,7 +66,7 @@ &main_gpio0 {
 &main_gpio1 {
 	pinctrl-names = "default";
 	pinctrl-0 =
-		<&main_m2_enable_pins_default>,
+		<&main_pcie_enable_pins_default>,
 		<&main_pmx0_m2_config_pins_default>,
 		<&main_pmx1_m2_config_pins_default>,
 		<&cp2102n_reset_pin_default>;
-- 
2.35.3