2023-05-10 12:17:58

by Jonathan McDowell

Subject: [PATCH v2 4/5] 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 <[email protected]>
---
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

2023-05-11 15:49:13

by Jernej Škrabec

Subject: Re: [PATCH v2 4/5] ARM: dts: sun5i: Add port E pinmux settings for mmc2

Dne sreda, 10. maj 2023 ob 14:02:02 CEST je Jonathan McDowell napisal(a):
> 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 <[email protected]>

Reviewed-by: Jernej Skrabec <[email protected]>

Best regards,
Jernej