linux-kernel - [PATCH 2/3] ARM: dts: sun5i: Add port E pinmux settings for mmc2

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Date:   Sat, 15 Apr 2023 18:46:24 +0100
From:   Jonathan McDowell <noodles@...th.li>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] ARM: dts: sun5i: Add port E pinmux settings for mmc2

These alternate pins for mmc2 are brought out to the 40 pin U14 header
on the C.H.I.P and can be used to add an external MMC device with a 4
bit interface. See

https://byteporter.com/ntc-chip-micro-sd-slot/

for further details on how.

Signed-off-by: Jonathan McDowell <noodles@...th.li>
---
 arch/arm/boot/dts/sun5i.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm/boot/dts/sun5i.dtsi b/arch/arm/boot/dts/sun5i.dtsi
index 250d6b87ab4d..e4922506ce22 100644
--- a/arch/arm/boot/dts/sun5i.dtsi
+++ b/arch/arm/boot/dts/sun5i.dtsi
@@ -517,6 +517,14 @@ mmc2_4bit_pc_pins: mmc2-4bit-pc-pins {
 				bias-pull-up;
 			};
 
+			mmc2_4bit_pe_pins: mmc2-4bit-pe-pins {
+				pins = "PE4", "PE5", "PE6", "PE7",
+				       "PE8", "PE9";
+				function = "mmc2";
+				drive-strength = <30>;
+				bias-pull-up;
+			};
+
 			mmc2_8bit_pins: mmc2-8bit-pins {
 				pins = "PC6", "PC7", "PC8", "PC9",
 				       "PC10", "PC11", "PC12", "PC13",
-- 
2.39.2