[PATCH 4/4] ARM: dts: imx: e70k02: add sy7636

[Alistair]

On Sat, 6 Sep 2025, at 7:09 PM, Andreas Kemnade wrote:
> Add the EPD PMIC for the e70k02 based devices as a step towards full EPD
> support.
> 
> Signed-off-by: Andreas Kemnade <akemnade at kernel.org>

Acked-by: Alistair Francis <alistair at alistair23.me>

Alistair

> ---
> arch/arm/boot/dts/nxp/imx/e70k02.dtsi              | 25 +++++++++++++++++++++-
> .../arm/boot/dts/nxp/imx/imx6sl-tolino-vision5.dts | 24 +++++++++++++++++++++
> .../arm/boot/dts/nxp/imx/imx6sll-kobo-librah2o.dts | 24 +++++++++++++++++++++
> 3 files changed, 72 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/nxp/imx/e70k02.dtsi b/arch/arm/boot/dts/nxp/imx/e70k02.dtsi
> index dcc3c9d488a88..5f6b7545a0c0c 100644
> --- a/arch/arm/boot/dts/nxp/imx/e70k02.dtsi
> +++ b/arch/arm/boot/dts/nxp/imx/e70k02.dtsi
> @@ -69,6 +69,14 @@ memory at 80000000 {
> reg = <0x80000000 0x20000000>;
> };
>  
> + epd_pmic_supply: regulator-epd-pmic-in {
> + compatible = "regulator-fixed";
> + regulator-name = "epd_pmic_supply";
> + gpio = <&gpio2 14 GPIO_ACTIVE_HIGH>;
> + startup-delay-us = <20000>;
> + enable-active-high;
> + };
> +
> reg_wifi: regulator-wifi {
> compatible = "regulator-fixed";
> regulator-name = "SD3_SPWR";
> @@ -133,7 +141,22 @@ touchscreen at 24 {
> vdd-supply = <&ldo5_reg>;
> };
>  
> - /* TODO: SY7636 PMIC for E Ink at 0x62 */
> + sy7636: pmic at 62 {
> + compatible = "silergy,sy7636a";
> + reg = <0x62>;
> + en-gpios = <&gpio2 8 GPIO_ACTIVE_HIGH>;
> + vcom-en-gpios = <&gpio2 3 GPIO_ACTIVE_HIGH>;
> + epd-pwr-good-gpios = <&gpio2 13 GPIO_ACTIVE_HIGH>;
> + vin-supply = <&epd_pmic_supply>;
> +
> + #thermal-sensor-cells = <0>;
> +
> + regulators {
> + reg_epdpmic: vcom {
> + regulator-name = "vcom";
> + };
> + };
> + };
>  
> };
>  
> diff --git a/arch/arm/boot/dts/nxp/imx/imx6sl-tolino-vision5.dts b/arch/arm/boot/dts/nxp/imx/imx6sl-tolino-vision5.dts
> index a2534c422a522..f8709a9524093 100644
> --- a/arch/arm/boot/dts/nxp/imx/imx6sl-tolino-vision5.dts
> +++ b/arch/arm/boot/dts/nxp/imx/imx6sl-tolino-vision5.dts
> @@ -26,6 +26,11 @@ / {
> compatible = "kobo,tolino-vision5", "fsl,imx6sl";
> };
>  
> +&epd_pmic_supply {
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_epd_pmic_supply>;
> +};
> +
> &gpio_keys {
> pinctrl-names = "default";
> pinctrl-0 = <&pinctrl_gpio_keys>;
> @@ -59,6 +64,12 @@ MX6SL_PAD_FEC_RXD1__GPIO4_IO18          0x10059 /* TP_RST */
> >;
> };
>  
> + pinctrl_epd_pmic_supply: epd-pmic-supplygrp {
> + fsl,pins = <
> + MX6SL_PAD_EPDC_PWRWAKEUP__GPIO2_IO14    0x40010059
> + >;
> + };
> +
> pinctrl_gpio_keys: gpio-keysgrp {
> fsl,pins = <
> MX6SL_PAD_FEC_CRS_DV__GPIO4_IO25 0x17059 /* PWR_SW */
> @@ -159,6 +170,14 @@ MX6SL_PAD_KEY_COL2__GPIO3_IO28 0x1b8b1 /* ricoh619 bat_low_int */
> >;
> };
>  
> + pinctrl_sy7636_gpio: sy7636-gpiogrp {
> + fsl,pins = <
> + MX6SL_PAD_EPDC_VCOM0__GPIO2_IO03        0x40010059 /* VCOM_CTRL */
> + MX6SL_PAD_EPDC_PWRCTRL1__GPIO2_IO08     0x40010059 /* EN */
> + MX6SL_PAD_EPDC_PWRSTAT__GPIO2_IO13      0x17059 /* PWR_GOOD */
> + >;
> + };
> +
> pinctrl_uart1: uart1grp {
> fsl,pins = <
> MX6SL_PAD_UART1_TXD__UART1_TX_DATA 0x1b0b1
> @@ -329,6 +348,11 @@ &ricoh619 {
> pinctrl-0 = <&pinctrl_ricoh_gpio>;
> };
>  
> +&sy7636 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_sy7636_gpio>;
> +};
> +
> &uart1 {
> pinctrl-names = "default";
> pinctrl-0 = <&pinctrl_uart1>;
> diff --git a/arch/arm/boot/dts/nxp/imx/imx6sll-kobo-librah2o.dts b/arch/arm/boot/dts/nxp/imx/imx6sll-kobo-librah2o.dts
> index 660620d226f71..19bbe60331b36 100644
> --- a/arch/arm/boot/dts/nxp/imx/imx6sll-kobo-librah2o.dts
> +++ b/arch/arm/boot/dts/nxp/imx/imx6sll-kobo-librah2o.dts
> @@ -36,6 +36,11 @@ &cpu0 {
> soc-supply = <&dcdc1_reg>;
> };
>  
> +&epd_pmic_supply {
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_epd_pmic_supply>;
> +};
> +
> &gpio_keys {
> pinctrl-names = "default";
> pinctrl-0 = <&pinctrl_gpio_keys>;
> @@ -69,6 +74,12 @@ MX6SLL_PAD_GPIO4_IO18__GPIO4_IO18 0x10059 /* TP_RST */
> >;
> };
>  
> + pinctrl_epd_pmic_supply: epd-pmic-supplygrp {
> + fsl,pins = <
> + MX6SLL_PAD_EPDC_PWR_WAKE__GPIO2_IO14    0x40010059
> + >;
> + };
> +
> pinctrl_gpio_keys: gpio-keysgrp {
> fsl,pins = <
> MX6SLL_PAD_GPIO4_IO25__GPIO4_IO25 0x17059 /* PWR_SW */
> @@ -169,6 +180,14 @@ MX6SLL_PAD_KEY_COL2__GPIO3_IO28 0x1b8b1 /* ricoh619 bat_low_int */
> >;
> };
>  
> + pinctrl_sy7636_gpio: sy7636-gpiogrp {
> + fsl,pins = <
> + MX6SLL_PAD_EPDC_VCOM0__GPIO2_IO03       0x40010059 /* VCOM_CTRL */
> + MX6SLL_PAD_EPDC_PWR_CTRL1__GPIO2_IO08   0x40010059 /* EN */
> + MX6SLL_PAD_EPDC_PWR_STAT__GPIO2_IO13    0x17059 /* PWR_GOOD */
> + >;
> + };
> +
> pinctrl_uart1: uart1grp {
> fsl,pins = <
> MX6SLL_PAD_UART1_TXD__UART1_DCE_TX 0x1b0b1
> @@ -319,6 +338,11 @@ &ricoh619 {
> pinctrl-0 = <&pinctrl_ricoh_gpio>;
> };
>  
> +&sy7636 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_sy7636_gpio>;
> +};
> +
> &uart1 {
> pinctrl-names = "default";
> pinctrl-0 = <&pinctrl_uart1>;
> 
> -- 
> 2.39.5
> 
>