[PATCH v2 0/1] arm64: tegra: enable SDIO on Jetson Nano M.2 Key E

[PATCH v2 0/1] arm64: tegra: enable SDIO on Jetson Nano M.2 Key E

[Tamás Szűcs]

It turns out SDMMC3 on the Jetson Nano module is wired to respective pins of
the carrier's M.2 Key E socket. However, it is not enabled. I see no reason
why. This block is functional and has a fixed 1.8 V I/O supply. Perfect for
SDIO cards nowdays. I think it would make sense to enable this feature. PCIe
could be used for something else.

Kind regards,
Tamas


Tamás Szűcs (1):
  arm64: tegra: Enable SDIO on Jetson Nano M.2 Key E

 arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

-- 
2.20.1

[PATCH v2 1/1] arm64: tegra: Enable SDIO on Jetson Nano M.2 Key E

[Tamás Szűcs]

Enable SDMMC3 and set it up for SDIO devices.

Signed-off-by: Tamás Szűcs <tszucs@protonmail.ch>
---
Changes in v2:
- keep card powered in suspend and enable WoWLAN

 arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts b/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts
index 90381d52ac54..7f7b720a2a1c 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts
+++ b/arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts
@@ -536,6 +536,19 @@
 		vmmc-supply = <&vdd_3v3_sd>;
 	};
 
+	sdhci@700b0400 {
+		status = "okay";
+		bus-width = <4>;
+
+		vqmmc-supply = <&vdd_1v8>;
+		vmmc-supply = <&vdd_3v3_sys>;
+
+		non-removable;
+		cap-sdio-irq;
+		keep-power-in-suspend;
+		wakeup-source;
+	};
+
 	clocks {
 		compatible = "simple-bus";
 		#address-cells = <1>;
-- 
2.20.1