linux-kernel - [PATCH v2 11/14] ARM: dts: imx6dl-colibri: Add usdhc1 sleep pin configuration

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Message-Id: <20220411152234.12678-12-max.oss.09@gmail.com>
Date:   Mon, 11 Apr 2022 17:22:31 +0200
From:   Max Krummenacher <max.oss.09@...il.com>
To:     max.krummenacher@...adex.com
Cc:     Fabio Estevam <festevam@...il.com>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 11/14] ARM: dts: imx6dl-colibri: Add usdhc1 sleep pin configuration

From: Max Krummenacher <max.krummenacher@...adex.com>

The Toradex board Iris V2 has a SD-card slot with switchable
power.
Add a pinctrl sleep used when the card power is off to avoid
backfeeding to the card and add the "sleep" pinctrl to the
usdhc1 controller.

Signed-off-by: Max Krummenacher <max.krummenacher@...adex.com>
---

(no changes since v1)

 arch/arm/boot/dts/imx6qdl-colibri.dtsi | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/imx6qdl-colibri.dtsi b/arch/arm/boot/dts/imx6qdl-colibri.dtsi
index 1c3c34bbfe98..c383e0e4110c 100644
--- a/arch/arm/boot/dts/imx6qdl-colibri.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-colibri.dtsi
@@ -680,10 +680,11 @@
 	bus-width = <4>;
 	no-1-8-v;
 	disable-wp;
-	pinctrl-names = "default", "state_100mhz", "state_200mhz";
+	pinctrl-names = "default", "state_100mhz", "state_200mhz", "sleep";
 	pinctrl-0 = <&pinctrl_usdhc1 &pinctrl_mmc_cd>;
 	pinctrl-1 = <&pinctrl_usdhc1_100mhz &pinctrl_mmc_cd>;
 	pinctrl-2 = <&pinctrl_usdhc1_200mhz &pinctrl_mmc_cd>;
+	pinctrl-3 = <&pinctrl_usdhc1_sleep &pinctrl_mmc_cd_sleep>;
 	vmmc-supply = <&reg_module_3v3>;
 	vqmmc-supply = <&vgen3_reg>;
 	status = "disabled";
@@ -951,6 +952,12 @@
 		>;
 	};
 
+	pinctrl_mmc_cd_sleep: mmccdslpgrp {
+		fsl,pins = <
+			MX6QDL_PAD_NANDF_D5__GPIO2_IO05	0x0
+		>;
+	};
+
 	pinctrl_pwm1: pwm1grp {
 		fsl,pins = <
 			MX6QDL_PAD_GPIO_9__PWM1_OUT	0x1b0b1
@@ -1097,6 +1104,18 @@
 		>;
 	};
 
+	/* avoid backfeeding with removed card power */
+	pinctrl_usdhc1_sleep: usdhc1sleepgrp {
+		fsl,pins = <
+			MX6QDL_PAD_SD1_CMD__SD1_CMD	0x3000
+			MX6QDL_PAD_SD1_CLK__SD1_CLK	0x3000
+			MX6QDL_PAD_SD1_DAT0__SD1_DATA0	0x3000
+			MX6QDL_PAD_SD1_DAT1__SD1_DATA1	0x3000
+			MX6QDL_PAD_SD1_DAT2__SD1_DATA2	0x3000
+			MX6QDL_PAD_SD1_DAT3__SD1_DATA3	0x3000
+		>;
+	};
+
 	pinctrl_usdhc3: usdhc3grp {
 		fsl,pins = <
 			MX6QDL_PAD_SD3_CMD__SD3_CMD	0x17059
-- 
2.20.1