linux-kernel - [PATCH 08/14] ARM: dts: stm32: Enable SDIO controller on stm32f469 disco board

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Date:   Fri, 12 Jan 2018 13:16:02 +0100
From:   <patrice.chotard@...com>
To:     Russell King <linux@...linux.org.uk>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexandre Torgue <alexandre.torgue@...com>
CC:     <linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-clk@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-gpio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        Andrea Merello <andrea.merello@...il.com>,
        Patrice Chotard <patrice.chotard@...com>
Subject: [PATCH 08/14] ARM: dts: stm32: Enable SDIO controller on stm32f469 disco board

From: Andrea Merello <andrea.merello@...il.com>

This patch adds SDIO-related DT nodes required by stm32f469 board

There is a hardware issue on these boards, it misses a pullup on
the GPIO line used as card detect to allow correct SD card
detection. To allow correct card detection "broken-cd" property
is used.

Signed-off-by: Andrea Merello <andrea.merello@...il.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@...com>
Signed-off-by: Patrice Chotard <patrice.chotard@...com>
---
 arch/arm/boot/dts/stm32f469-disco.dts | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/arch/arm/boot/dts/stm32f469-disco.dts b/arch/arm/boot/dts/stm32f469-disco.dts
index 318fb12..ebb97c3 100644
--- a/arch/arm/boot/dts/stm32f469-disco.dts
+++ b/arch/arm/boot/dts/stm32f469-disco.dts
@@ -66,6 +66,13 @@
 		serial0 = &usart3;
 	};
 
+	mmc_vcard: mmc_vcard {
+		compatible = "regulator-fixed";
+		regulator-name = "mmc_vcard";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
+
 	soc {
 		dma-ranges = <0xc0000000 0x0 0x10000000>;
 	};
@@ -120,6 +127,18 @@
 	};
 };
 
+&sdio {
+	status = "okay";
+	vmmc-supply = <&mmc_vcard>;
+	cd-gpios = <&gpiog 2 0>;
+	cd-inverted;
+	broken-cd;
+	pinctrl-names = "default", "opendrain";
+	pinctrl-0 = <&sdio_pins>;
+	pinctrl-1 = <&sdio_pins_od>;
+	bus-width = <4>;
+};
+
 &usart3 {
 	pinctrl-0 = <&usart3_pins_a>;
 	pinctrl-names = "default";
-- 
1.9.1