linux-kernel - [PATCH 2/2] riscv: dts: unmatched: Add gpio card detect to mmc-spi-slot

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Message-Id: <20210616074645.429578-2-bmeng.cn@gmail.com>
Date:   Wed, 16 Jun 2021 15:46:45 +0800
From:   Bin Meng <bmeng.cn@...il.com>
To:     Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        David Abdurachmanov <david.abdurachmanov@...ive.com>,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org
Cc:     Bin Meng <bin.meng@...driver.com>
Subject: [PATCH 2/2] riscv: dts: unmatched: Add gpio card detect to mmc-spi-slot

From: Bin Meng <bin.meng@...driver.com>

Per HiFive Unmatched schematics, the card detect signal of the
micro SD card is connected to gpio pin #15, which should be
reflected in the DT via the <gpios> property, as described in
Documentation/devicetree/bindings/mmc/mmc-spi-slot.txt.

[1] https://sifive.cdn.prismic.io/sifive/6a06d6c0-6e66-49b5-8e9e-e68ce76f4192_hifive-unmatched-schematics-v3.pdf

Signed-off-by: Bin Meng <bin.meng@...driver.com>
---

 arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
index b1c3c596578f..214794363c6a 100644
--- a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
+++ b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
@@ -2,6 +2,7 @@
 /* Copyright (c) 2020 SiFive, Inc */
 
 #include "fu740-c000.dtsi"
+#include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 
 /* Clock frequency (in Hz) of the PCB crystal for rtcclk */
@@ -228,6 +229,7 @@ mmc@0 {
 		spi-max-frequency = <20000000>;
 		voltage-ranges = <3300 3300>;
 		disable-wp;
+		gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
 	};
 };
 
-- 
2.25.1