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ARM: dts: renesas: armadillo800eva: Enable SDHI1

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The Armadillo-800EVA board provides an SD card slot and an AWL13 SDIO
interface connected to the SDHI1 controller.  Routing between these two
interfaces is controlled by a mechanical DIP switch and a set of
multiplexers.

To support this, add:
  - A fixed 3.3V regulator for SDHI1 power, controlled by PORT16 (G2),
  - SDHI1 pinmux groups for data, control, and card detection,
  - A gpio-hog for PORT6 (J5) to control the SDHI1/AWLAN multiplexer.

PORT176 (N21) is already configured as output-high in this DTS (via
lcd0-mux-hog), routing the SDSLOT2_ENABLE signal to PORT6.  Since the
hardware includes an external 10k pull-up resistor (R94) on this line,
PORT6 is configured as an input to allow the physical DIP switch to
determine the routing without SoC interference.

Both configurations have been verified:
  - SD card (CON8): detected as mmcblk1, high-speed SDHC,
  - SDIO (CON14): detected as mmc1, high-speed SDIO.

Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260224074532.60046-1-phucduc.bui@gmail.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
This commit is contained in:
bui duc phuc
2026-02-24 14:45:32 +07:00
committed by Geert Uytterhoeven
parent b2eaf45e12
commit 057c0944e0
1 changed files with 31 additions and 0 deletions
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31
arch/arm/boot/dts/renesas/r8a7740-armadillo800eva.dts
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@@ -65,6 +65,17 @@ vccq_sdhi0: regulator-vccq-sdhi0 {
enable-active-high;
};
vcc_sdhi1: regulator-vcc-sdhi1 {
compatible = "regulator-fixed";
regulator-name = "SDHI1 Vcc";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
gpio = <&pfc 16 GPIO_ACTIVE_HIGH>;
enable-active-high;
};
reg_5p0v: regulator-5p0v {
compatible = "regulator-fixed";
regulator-name = "fixed-5.0V";
@@ -285,6 +296,11 @@ sdhi0_pins: sd0 {
function = "sdhi0";
};
sdhi1_pins: sd1 {
groups = "sdhi1_data4", "sdhi1_ctrl", "sdhi1_cd", "sdhi1_wp";
function = "sdhi1";
};
fsia_pins: sounda {
groups = "fsia_sclk_in", "fsia_mclk_out",
"fsia_data_in_1", "fsia_data_out_0";
@@ -302,6 +318,12 @@ lcd0-mux-hog {
gpios = <176 0>;
output-high;
};
sdhi1-select-hog {
gpio-hog;
gpios = <6 0>;
input;
};
};
&tpu {
@@ -336,6 +358,15 @@ &sdhi0 {
status = "okay";
};
&sdhi1 {
pinctrl-0 = <&sdhi1_pins>;
pinctrl-names = "default";
vmmc-supply = <&vcc_sdhi1>;
bus-width = <4>;
status = "okay";
};
&sh_fsi2 {
pinctrl-0 = <&fsia_pins>;
pinctrl-names = "default";