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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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3d6c2bc762
Introduce device tree overlays for supporting the eMMC (RTK0EF0186B02000BJ) and microSD (RTK0EF0186B01000BJ) sub-boards connected via the CN15 connector on the RZ/V2H and RZ/V2N evaluation kits. These overlays enable SDHI0 with appropriate pin control settings, power regulators, and GPIO handling. Both sub-boards are supported using shared overlay files that can be applied to either EVK due to their identical connector layout and interface support. To support this, new DT overlay files are added: - `rzv2-evk-cn15-emmc.dtso` for eMMC - `rzv2-evk-cn15-sd.dtso` for microSD Additionally, the base DTS files for both EVKs are updated to include a fixed 1.8V regulator (`reg_1p8v`) needed by the eMMC sub-board and potential future use cases such as HDMI output. Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/20250627193742.110818-1-prabhakar.mahadev-lad.rj@bp.renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
70 lines
1.4 KiB
Plaintext
70 lines
1.4 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0
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/*
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* Shared DT overlay for the microSD Sub Board (RTK0EF0186B01000BJ), which
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* is connected to the CN15 connector on the RZ/V2H and RZ/V2N EVKs.
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*
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* Copyright (C) 2025 Renesas Electronics Corp.
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*/
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/dts-v1/;
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/plugin/;
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/pinctrl/rzg2l-pinctrl.h>
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&{/} {
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aliases {
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mmc0 = "/soc/mmc@15c00000";
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};
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vqmmc_sdhi0: regulator-vqmmc-sdhi0 {
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compatible = "regulator-gpio";
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regulator-name = "SDHI0 VqmmC";
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gpios = <&pinctrl RZG2L_GPIO(10, 0) GPIO_ACTIVE_HIGH>;
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <3300000>;
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gpios-states = <0>;
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states = <3300000 0>, <1800000 1>;
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};
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};
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&pinctrl {
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sdhi0-pwr-en-hog {
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gpio-hog;
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gpios = <RZG2L_GPIO(10, 1) GPIO_ACTIVE_HIGH>;
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output-high;
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line-name = "sd0_pwr_en";
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};
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sdhi0_pins: sd0 {
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sd0-cd {
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pinmux = <RZG2L_PORT_PINMUX(10, 5, 15)>; /* SD0_CD */
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};
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sd0-clk {
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pins = "SD0CLK";
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renesas,output-impedance = <3>;
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slew-rate = <0>;
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};
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sd0-dat-cmd {
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pins = "SD0DAT0", "SD0DAT1", "SD0DAT2", "SD0DAT3", "SD0CMD";
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input-enable;
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renesas,output-impedance = <3>;
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slew-rate = <0>;
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};
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};
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};
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&sdhi0 {
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pinctrl-0 = <&sdhi0_pins>;
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pinctrl-1 = <&sdhi0_pins>;
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pinctrl-names = "default", "state_uhs";
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vmmc-supply = <®_3p3v>;
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vqmmc-supply = <&vqmmc_sdhi0>;
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bus-width = <4>;
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sd-uhs-sdr50;
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sd-uhs-sdr104;
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status = "okay";
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};
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