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Date:   Tue, 16 May 2023 18:48:05 +0100
From:   Jonathan McDowell <noodles@earth.li>
To:     Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Chen-Yu Tsai <wens@csie.org>,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        Samuel Holland <samuel@sholland.org>,
        Linus Walleij <linus.walleij@linaro.org>,
        Bartosz Golaszewski <brgl@bgdev.pl>,
        Conor Dooley <conor+dt@kernel.org>, andy.shevchenko@gmail.com
Cc:     devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org,
        linux-gpio@vger.kernel.org
Subject: [PATCH v3 4/5] ARM: dts: sun5i: Add port E pinmux settings for mmc2
Message-ID: <644b0a6aee41d205eb51d35365265ed63669707b.1684258957.git.noodles@earth.li>
References: <cover.1683719613.git.noodles@earth.li>
 <cover.1684258957.git.noodles@earth.li>
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Precedence: bulk

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@earth.li>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
---
 arch/arm/boot/dts/sun5i.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/boot/dts/sun5i.dtsi b/arch/arm/boot/dts/sun5i.dtsi
index 250d6b87ab4d..ab7f675aeec4 100644
--- a/arch/arm/boot/dts/sun5i.dtsi
+++ b/arch/arm/boot/dts/sun5i.dtsi
@@ -517,6 +517,15 @@ mmc2_4bit_pc_pins: mmc2-4bit-pc-pins {
 				bias-pull-up;
 			};
 
+			/omit-if-no-ref/
+			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