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ARM: dts: imx: Add devicetree for Kobo Clara 2E

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Adds a devicetree for the Kobo Clara 2E Ebook reader. It is based
on boards marked with "37NB-E60K2M+4A2" or "37NB-E60K2M+4B0". It is
equipped with an i.MX6SLL SoC.

Expected to work:
  - Buttons
  - Wifi
  - Bluetooth
    (if Wifi is initialized first, driver does not handle regulators
     yet)
  - LED
  - uSD
  - USB
  - RTC
  - Touchscreen

Add human-readable comments for devices without mainlined driver and
binding. Such comments can e.g. be help to find testers if someone
starts to work on the missing drivers.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Andreas Kemnade 2024-11-03 14:52:00 +01:00 committed by Shawn Guo
parent 0ceb274528
commit 4de1651cde
4 changed files with 559 additions and 0 deletions
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2
arch/arm/boot/dts/nxp/imx/Makefile
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@ -292,6 +292,8 @@ dtb-$(CONFIG_SOC_IMX6SL) += \
dtb-$(CONFIG_SOC_IMX6SLL) += \
imx6sll-evk.dtb \
imx6sll-kobo-clarahd.dtb \
imx6sll-kobo-clara2e-a.dtb \
imx6sll-kobo-clara2e-b.dtb \
imx6sll-kobo-librah2o.dtb
dtb-$(CONFIG_SOC_IMX6SX) += \
imx6sx-nitrogen6sx.dtb \

23
arch/arm/boot/dts/nxp/imx/imx6sll-kobo-clara2e-a.dts Normal file
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@ -0,0 +1,23 @@
// SPDX-License-Identifier: (GPL-2.0)
/*
* Device tree for the Kobo Clara 2E rev A ebook reader
*
* Name on mainboard is: 37NB-E60K2M+4A2
* Serials start with: E60K2M (a number also seen in
* vendor kernel sources)
*
* Copyright 2024 Andreas Kemnade
*/
/dts-v1/;
#include "imx6sll-kobo-clara2e-common.dtsi"
/ {
model = "Kobo Clara 2E";
compatible = "kobo,clara2e-b", "kobo,clara2e", "fsl,imx6sll";
};
&i2c2 {
/* EPD PMIC SY7636 at 0x62 */
};

23
arch/arm/boot/dts/nxp/imx/imx6sll-kobo-clara2e-b.dts Normal file
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@ -0,0 +1,23 @@
// SPDX-License-Identifier: (GPL-2.0)
/*
* Device tree for the Kobo Clara 2E rev B ebook reader
*
* Name on mainboard is: 37NB-E60K2M+4B0
* Serials start with: E60K2M (a number also seen in
* vendor kernel sources)
*
* Copyright 2024 Andreas Kemnade
*/
/dts-v1/;
#include "imx6sll-kobo-clara2e-common.dtsi"
/ {
model = "Kobo Clara 2E";
compatible = "kobo,clara2e-b", "kobo,clara2e", "fsl,imx6sll";
};
&i2c2 {
/* EPD PMIC JD9930 at 0x18 */
};

511
arch/arm/boot/dts/nxp/imx/imx6sll-kobo-clara2e-common.dtsi Normal file
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@ -0,0 +1,511 @@
// SPDX-License-Identifier: (GPL-2.0)
/*
* Common part for Kobo Clara 2e device tree
* Copyright 2024 Andreas Kemnade
*/
/dts-v1/;
#include <dt-bindings/input/input.h>
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/leds/common.h>
#include "imx6sll.dtsi"
/ {
aliases {
mmc0 = &usdhc2;
mmc1 = &usdhc3;
};
chosen {
stdout-path = &uart1;
};
gpio-keys {
compatible = "gpio-keys";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_gpio_keys>;
key-cover {
label = "Cover";
gpios = <&gpio4 23 GPIO_ACTIVE_LOW>;
linux,code = <SW_LID>;
linux,input-type = <EV_SW>;
wakeup-source;
};
};
leds {
compatible = "gpio-leds";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_led>;
led {
color = <LED_COLOR_ID_WHITE>;
function = LED_FUNCTION_POWER;
gpios = <&gpio4 17 GPIO_ACTIVE_LOW>;
linux,default-trigger = "timer";
};
};
memory@80000000 {
device_type = "memory";
reg = <0x80000000 0x20000000>;
};
reg_wifi: regulator-wifi {
compatible = "regulator-fixed";
regulator-name = "SD3_SPWR";
regulator-min-microvolt = <3000000>;
regulator-max-microvolt = <3000000>;
gpio = <&gpio4 29 GPIO_ACTIVE_HIGH>;
enable-active-high;
};
};
&clks {
assigned-clocks = <&clks IMX6SLL_CLK_PLL4_AUDIO_DIV>;
assigned-clock-rates = <393216000>;
};
&cpu0 {
arm-supply = <&buck1>;
soc-supply = <&buck2>;
};
&i2c1 {
pinctrl-names = "default","sleep";
pinctrl-0 = <&pinctrl_i2c1>;
pinctrl-1 = <&pinctrl_i2c1_sleep>;
clock-frequency = <100000>;
status = "okay";
/* backlight aw99703 at 0x36 */
};
&i2c2 {
pinctrl-names = "default","sleep";
pinctrl-0 = <&pinctrl_i2c2>;
pinctrl-1 = <&pinctrl_i2c2_sleep>;
clock-frequency = <100000>;
status = "okay";
/* backlight aw99703 at 0x36 */
touchscreen@38 {
compatible = "focaltech,ft5426";
reg = <0x38>;
pinctrl-names = "default", "suspend";
pinctrl-0 = <&pinctrl_touch_gpio>;
pinctrl-1 = <&pinctrl_touch_gpio_sleep>;
interrupt-parent = <&gpio4>;
interrupts = <24 IRQ_TYPE_EDGE_FALLING>;
reset-gpios = <&gpio4 18 GPIO_ACTIVE_LOW>;
touchscreen-size-x = <1072>;
touchscreen-size-y = <1448>;
touchscreen-swapped-x-y;
};
};
&i2c3 {
/* Bus seems to be in bad state after boot, allow full recovery */
pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_i2c3>;
pinctrl-1 = <&pinctrl_i2c3_gpio>;
sda-gpios = <&gpio3 22 GPIO_ACTIVE_HIGH>;
scl-gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>;
clock-frequency = <100000>;
status = "okay";
pmic@4b {
compatible = "rohm,bd71879", "rohm,bd71828";
reg = <0x4b>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_bd71828>;
interrupt-parent = <&gpio4>;
interrupts = <19 IRQ_TYPE_LEVEL_LOW>;
system-power-controller;
clocks = <&clks 0>;
#clock-cells = <0>;
clock-output-names = "bd71828-32k-out";
gpio-controller;
#gpio-cells = <2>;
gpio-reserved-ranges = <0 1>, <2 1>;
/* charge sense resistor is 30 milli-ohm */
regulators {
LDO1 {
name = "LDO1";
regulator-name = "ldo1";
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <3300000>;
};
LDO2 {
name = "LDO2";
regulator-name = "ldo2";
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <3300000>;
};
LDO3 {
name = "LDO3";
regulator-name = "ldo3";
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <3300000>;
};
ldo4: LDO4 {
name = "LDO4";
regulator-name = "ldo4";
regulator-always-on;
regulator-min-microvolt = <1100000>;
regulator-max-microvolt = <1100000>;
};
LDO5 {
name = "LDO5";
regulator-name = "ldo5";
regulator-always-on;
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <3300000>;
};
LDO6 {
name = "LDO6";
regulator-name = "ldo6";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
};
LDO7 {
name = "LDO7";
regulator-name = "ldo7";
regulator-always-on;
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <3300000>;
regulator-boot-on;
};
buck1: BUCK1 {
name = "BUCK1";
regulator-name = "buck1";
regulator-always-on;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1400000>;
regulator-boot-on;
};
buck2: BUCK2 {
name = "BUCK2";
regulator-name = "buck2";
regulator-always-on;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <2000000>;
regulator-boot-on;
};
BUCK3 {
name = "BUCK3";
regulator-name = "buck3";
regulator-always-on;
regulator-min-microvolt = <1200000>;
regulator-max-microvolt = <1800000>;
regulator-boot-on;
};
BUCK4 {
name = "BUCK4";
regulator-name = "buck4";
regulator-always-on;
regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <1200000>;
regulator-boot-on;
};
BUCK5 {
name = "BUCK5";
regulator-name = "buck5";
regulator-always-on;
regulator-min-microvolt = <2500000>;
regulator-max-microvolt = <3300000>;
regulator-boot-on;
};
BUCK6 {
name = "BUCK6";
regulator-name = "buck6";
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <2000000>;
};
BUCK7 {
name = "BUCK7";
regulator-name = "buck7";
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <2000000>;
};
};
};
};
&iomuxc {
pinctrl_bd71828: bd71828-gpiogrp {
fsl,pins = <
MX6SLL_PAD_KEY_COL0__GPIO3_IO24 0x1b8b1
MX6SLL_PAD_GPIO4_IO19__GPIO4_IO19 0x1b8b1
>;
};
pinctrl_gpio_keys: gpio-keysgrp {
fsl,pins = <
MX6SLL_PAD_GPIO4_IO25__GPIO4_IO25 0x17059 /* PWR_SW */
MX6SLL_PAD_GPIO4_IO23__GPIO4_IO23 0x17059 /* HALL_EN */
>;
};
pinctrl_i2c1: i2c1grp {
fsl,pins = <
MX6SLL_PAD_I2C1_SCL__I2C1_SCL 0x4001f8b1
MX6SLL_PAD_I2C1_SDA__I2C1_SDA 0x4001f8b1
>;
};
pinctrl_i2c1_sleep: i2c1-sleepgrp {
fsl,pins = <
MX6SLL_PAD_I2C1_SCL__I2C1_SCL 0x400108b1
MX6SLL_PAD_I2C1_SDA__I2C1_SDA 0x400108b1
>;
};
pinctrl_i2c2: i2c2grp {
fsl,pins = <
MX6SLL_PAD_I2C2_SCL__I2C2_SCL 0x4001f8b1
MX6SLL_PAD_I2C2_SDA__I2C2_SDA 0x4001f8b1
>;
};
pinctrl_i2c2_sleep: i2c2-sleepgrp {
fsl,pins = <
MX6SLL_PAD_I2C2_SCL__I2C2_SCL 0x400108b1
MX6SLL_PAD_I2C2_SDA__I2C2_SDA 0x400108b1
>;
};
pinctrl_i2c3: i2c3grp {
fsl,pins = <
MX6SLL_PAD_REF_CLK_24M__I2C3_SCL 0x4001f8b1
MX6SLL_PAD_REF_CLK_32K__I2C3_SDA 0x4001f8b1
>;
};
pinctrl_i2c3_gpio: i2c3-gpiogrp {
fsl,pins = <
MX6SLL_PAD_REF_CLK_24M__GPIO3_IO21 0x4001f8b1
MX6SLL_PAD_REF_CLK_32K__GPIO3_IO22 0x4001f8b1
>;
};
pinctrl_led: ledgrp {
fsl,pins = <
MX6SLL_PAD_GPIO4_IO17__GPIO4_IO17 0x10059
>;
};
pinctrl_touch_gpio: touch-gpiogrp {
fsl,pins = <
MX6SLL_PAD_GPIO4_IO24__GPIO4_IO24 0x17059 /* TP_INT */
MX6SLL_PAD_GPIO4_IO18__GPIO4_IO18 0x10059 /* TP_RST */
>;
};
pinctrl_touch_gpio_sleep: touch-gpio-sleepgrp {
fsl,pins = <
MX6SLL_PAD_GPIO4_IO24__GPIO4_IO24 0x10059 /* TP_INT */
MX6SLL_PAD_GPIO4_IO18__GPIO4_IO18 0x10059 /* TP_RST */
>;
};
pinctrl_uart1: uart1grp {
fsl,pins = <
MX6SLL_PAD_UART1_TXD__UART1_DCE_TX 0x1b0b1
MX6SLL_PAD_UART1_RXD__UART1_DCE_RX 0x1b0b1
>;
};
pinctrl_uart2: uart2grp {
fsl,pins = <
MX6SLL_PAD_LCD_ENABLE__UART2_DCE_RX 0x41b0b1
MX6SLL_PAD_LCD_HSYNC__UART2_DCE_TX 0x41b0b1
MX6SLL_PAD_LCD_VSYNC__UART2_DCE_RTS 0x41b0b1
MX6SLL_PAD_LCD_RESET__UART2_DCE_CTS 0x41b0b1
>;
};
pinctrl_uart2_sleep: uart2-sleepgrp {
fsl,pins = <
MX6SLL_PAD_LCD_ENABLE__GPIO2_IO16 0x10059
MX6SLL_PAD_LCD_HSYNC__GPIO2_IO17 0x10059
MX6SLL_PAD_LCD_VSYNC__GPIO2_IO18 0x10059
MX6SLL_PAD_LCD_RESET__GPIO2_IO19 0x10059
>;
};
pinctrl_usbotg1: usbotg1grp {
fsl,pins = <
MX6SLL_PAD_EPDC_PWR_COM__USB_OTG1_ID 0x17059
>;
};
pinctrl_usdhc2: usdhc2grp {
fsl,pins = <
MX6SLL_PAD_SD2_CMD__SD2_CMD 0x17059
MX6SLL_PAD_SD2_CLK__SD2_CLK 0x13059
MX6SLL_PAD_SD2_DATA0__SD2_DATA0 0x17059
MX6SLL_PAD_SD2_DATA1__SD2_DATA1 0x17059
MX6SLL_PAD_SD2_DATA2__SD2_DATA2 0x17059
MX6SLL_PAD_SD2_DATA3__SD2_DATA3 0x17059
>;
};
pinctrl_usdhc2_100mhz: usdhc2-100mhzgrp {
fsl,pins = <
MX6SLL_PAD_SD2_CMD__SD2_CMD 0x170b9
MX6SLL_PAD_SD2_CLK__SD2_CLK 0x130b9
MX6SLL_PAD_SD2_DATA0__SD2_DATA0 0x170b9
MX6SLL_PAD_SD2_DATA1__SD2_DATA1 0x170b9
MX6SLL_PAD_SD2_DATA2__SD2_DATA2 0x170b9
MX6SLL_PAD_SD2_DATA3__SD2_DATA3 0x170b9
>;
};
pinctrl_usdhc2_200mhz: usdhc2-200mhzgrp {
fsl,pins = <
MX6SLL_PAD_SD2_CMD__SD2_CMD 0x170f9
MX6SLL_PAD_SD2_CLK__SD2_CLK 0x130f9
MX6SLL_PAD_SD2_DATA0__SD2_DATA0 0x170f9
MX6SLL_PAD_SD2_DATA1__SD2_DATA1 0x170f9
MX6SLL_PAD_SD2_DATA2__SD2_DATA2 0x170f9
MX6SLL_PAD_SD2_DATA3__SD2_DATA3 0x170f9
>;
};
pinctrl_usdhc2_sleep: usdhc2-sleepgrp {
fsl,pins = <
MX6SLL_PAD_SD2_CMD__GPIO5_IO04 0x100f9
MX6SLL_PAD_SD2_CLK__GPIO5_IO05 0x100f9
MX6SLL_PAD_SD2_DATA0__GPIO5_IO01 0x100f9
MX6SLL_PAD_SD2_DATA1__GPIO4_IO30 0x100f9
MX6SLL_PAD_SD2_DATA2__GPIO5_IO03 0x100f9
MX6SLL_PAD_SD2_DATA3__GPIO4_IO28 0x100f9
>;
};
pinctrl_usdhc3: usdhc3grp {
fsl,pins = <
MX6SLL_PAD_SD3_CMD__SD3_CMD 0x11059
MX6SLL_PAD_SD3_CLK__SD3_CLK 0x11059
MX6SLL_PAD_SD3_DATA0__SD3_DATA0 0x11059
MX6SLL_PAD_SD3_DATA1__SD3_DATA1 0x11059
MX6SLL_PAD_SD3_DATA2__SD3_DATA2 0x11059
MX6SLL_PAD_SD3_DATA3__SD3_DATA3 0x11059
>;
};
pinctrl_usdhc3_100mhz: usdhc3-100mhzgrp {
fsl,pins = <
MX6SLL_PAD_SD3_CMD__SD3_CMD 0x170b9
MX6SLL_PAD_SD3_CLK__SD3_CLK 0x170b9
MX6SLL_PAD_SD3_DATA0__SD3_DATA0 0x170b9
MX6SLL_PAD_SD3_DATA1__SD3_DATA1 0x170b9
MX6SLL_PAD_SD3_DATA2__SD3_DATA2 0x170b9
MX6SLL_PAD_SD3_DATA3__SD3_DATA3 0x170b9
>;
};
pinctrl_usdhc3_200mhz: usdhc3-200mhzgrp {
fsl,pins = <
MX6SLL_PAD_SD3_CMD__SD3_CMD 0x170f9
MX6SLL_PAD_SD3_CLK__SD3_CLK 0x170f9
MX6SLL_PAD_SD3_DATA0__SD3_DATA0 0x170f9
MX6SLL_PAD_SD3_DATA1__SD3_DATA1 0x170f9
MX6SLL_PAD_SD3_DATA2__SD3_DATA2 0x170f9
MX6SLL_PAD_SD3_DATA3__SD3_DATA3 0x170f9
>;
};
pinctrl_usdhc3_sleep: usdhc3-sleepgrp {
fsl,pins = <
MX6SLL_PAD_SD3_CMD__GPIO5_IO21 0x100c1
MX6SLL_PAD_SD3_CLK__GPIO5_IO18 0x100c1
MX6SLL_PAD_SD3_DATA0__GPIO5_IO19 0x100c1
MX6SLL_PAD_SD3_DATA1__GPIO5_IO20 0x100c1
MX6SLL_PAD_SD3_DATA2__GPIO5_IO16 0x100c1
MX6SLL_PAD_SD3_DATA3__GPIO5_IO17 0x100c1
>;
};
pinctrl_wifi_power: wifi-powergrp {
fsl,pins = <
MX6SLL_PAD_SD2_DATA6__GPIO4_IO29 0x10059
>;
};
};
&snvs_rtc {
/* we are using the rtc in the pmic, not disabled in imx6sll.dtsi */
status = "disabled";
};
&uart1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart1>;
status = "okay";
};
&uart2 {
pinctrl-names = "default", "sleep";
pinctrl-0 = <&pinctrl_uart2>;
pinctrl-1 = <&pinctrl_uart2_sleep>;
status = "okay";
/* requires LDO4 + power enable gpio */
bluetooth {
compatible = "nxp,88w8987-bt";
fw-init-baudrate = <1500000>;
};
};
&usbotg1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usbotg1>;
disable-over-current;
srp-disable;
hnp-disable;
adp-disable;
status = "okay";
};
&usdhc2 {
pinctrl-names = "default", "state_100mhz", "state_200mhz","sleep";
pinctrl-0 = <&pinctrl_usdhc2>;
pinctrl-1 = <&pinctrl_usdhc2_100mhz>;
pinctrl-2 = <&pinctrl_usdhc2_200mhz>;
pinctrl-3 = <&pinctrl_usdhc2_sleep>;
non-removable;
status = "okay";
};
&usdhc3 {
pinctrl-names = "default", "state_100mhz", "state_200mhz","sleep";
pinctrl-0 = <&pinctrl_usdhc3>;
pinctrl-1 = <&pinctrl_usdhc3_100mhz>;
pinctrl-2 = <&pinctrl_usdhc3_200mhz>;
pinctrl-3 = <&pinctrl_usdhc3_sleep>;
/* card requires also ldo4 */
vmmc-supply = <&reg_wifi>;
cap-power-off-card;
non-removable;
status = "okay";
};