[PATCH 1/2] imx7d-remarkable2.dts: Initial device tree for reMarkable2

* [PATCH 1/2] imx7d-remarkable2.dts: Initial device tree for reMarkable2
@ 2021-01-17  3:51 Alistair Francis
  2021-01-17  3:51 ` [PATCH 2/2] remarkable2_defconfig: Add initial support for the reMarkable2 Alistair Francis
  0 siblings, 1 reply; 6+ messages in thread
From: Alistair Francis @ 2021-01-17  3:51 UTC (permalink / raw)
  To: arnd, olof, robh+dt, shawnguo, s.hauer, kernel, festevam, linux-imx
  Cc: linux-arm-kernel, devicetree, linux-kernel, alistair23, Alistair Francis

The reMarkable2 (https://remarkable.com) is an e-ink tablet based on
the imx7d SoC.

This commit is based on the DTS provide by reMarkable but ported to the
latest kernel (instead of 4.14). I have removed references to
non-upstream devices and have changed the UART so that the console can
be accessed without having to open up the device via the OTG pogo pins.

Currently the kernel boots, but there is no support for the dispaly,
WiFi or the power controller chips.

Signed-off-by: Alistair Francis <alistair@alistair23.me>
---
 arch/arm/boot/dts/Makefile              |   1 +
 arch/arm/boot/dts/imx7d-remarkable2.dts | 375 ++++++++++++++++++++++++
 2 files changed, 376 insertions(+)
 create mode 100644 arch/arm/boot/dts/imx7d-remarkable2.dts

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 3d1ea0b25168..5fca2612ef58 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -664,6 +664,7 @@ dtb-$(CONFIG_SOC_IMX7D) += \
 	imx7d-sdb-sht11.dtb \
 	imx7d-zii-rmu2.dtb \
 	imx7d-zii-rpu2.dtb \
+	imx7d-remarkable2.dtb \
 	imx7s-colibri-aster.dtb \
 	imx7s-colibri-eval-v3.dtb \
 	imx7s-mba7.dtb \
diff --git a/arch/arm/boot/dts/imx7d-remarkable2.dts b/arch/arm/boot/dts/imx7d-remarkable2.dts
new file mode 100644
index 000000000000..fba55a0e028a
--- /dev/null
+++ b/arch/arm/boot/dts/imx7d-remarkable2.dts
@@ -0,0 +1,375 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2015 Freescale Semiconductor, Inc.
+ * Copyright (C) 2019 reMarkable AS - http://www.remarkable.com/
+ *
+ * This file is dual-licensed: you can use it either under the terms
+ * of the GPL or the X11 license, at your option. Note that this dual
+ * licensing only applies to this file, and not this project as a
+ * whole.
+ *
+ *  a) This file is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU General Public License as
+ *     published by the Free Software Foundation; either version 2 of the
+ *     License, or (at your option) any later version.
+ *
+ *     This file is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ * Or, alternatively,
+ *
+ *  b) Permission is hereby granted, free of charge, to any person
+ *     obtaining a copy of this software and associated documentation
+ *     files (the "Software"), to deal in the Software without
+ *     restriction, including without limitation the rights to use,
+ *     copy, modify, merge, publish, distribute, sublicense, and/or
+ *     sell copies of the Software, and to permit persons to whom the
+ *     Software is furnished to do so, subject to the following
+ *     conditions:
+ *
+ *     The above copyright notice and this permission notice shall be
+ *     included in all copies or substantial portions of the Software.
+ *
+ *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *     OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/dts-v1/;
+
+#include "imx7d.dtsi"
+
+/ {
+	model = "reMarkable 2.0";
+	compatible = "fsl,imx7d-sdb", "fsl,imx7d";
+
+	chosen {
+		stdout-path = &uart6;
+	};
+
+	memory {
+		reg = <0x80000000 0x40000000>;
+	};
+
+	reg_vref_1v8: regulator-vref-1v8 {
+		compatible = "regulator-fixed";
+		regulator-name = "vref-1v8";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+	};
+
+	reg_brcm: regulator-brcm {
+		compatible = "regulator-fixed";
+		regulator-name = "brcm_reg";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		pinctrl-names = "default", "sleep";
+		pinctrl-0 = <&pinctrl_brcm_reg>;
+		pinctrl-1 = <&pinctrl_brcm_reg>;
+		gpio = <&gpio6 13 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		startup-delay-us = <150>;
+	};
+
+	reg_digitizer: regulator-digitizer {
+		compatible = "regulator-fixed";
+		regulator-name = "VDD_3V3_DIGITIZER";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		pinctrl-names = "default", "sleep";
+		pinctrl-0 = <&pinctrl_digitizer_reg>;
+		pinctrl-1 = <&pinctrl_digitizer_reg>;
+		gpio = <&gpio1 6 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		startup-delay-us = <100000>; /* 100 ms */
+	};
+
+	reg_touch: regulator-touch {
+		compatible = "regulator-fixed";
+		regulator-name = "VDD_3V3_TOUCH";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		pinctrl-names = "default", "sleep";
+		pinctrl-0 = <&pinctrl_touch_reg>;
+		pinctrl-1 = <&pinctrl_touch_reg>;
+		gpio = <&gpio1 11 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
+	reg_sdoe: regulator-sdoe {
+		compatible = "regulator-fixed";
+		regulator-name = "SDOE";
+		pinctrl-names = "default", "sleep";
+		pinctrl-0 = <&pinctrl_sdoe_reg>;
+		pinctrl-1 = <&pinctrl_sdoe_reg>;
+		gpio = <&gpio3 27 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
+	reg_gdoe: regulator-gdoe {
+		compatible = "regulator-fixed";
+		regulator-name = "GDOE";
+		pinctrl-names = "default", "sleep";
+		pinctrl-0 = <&pinctrl_gdoe_reg>;
+		pinctrl-1 = <&pinctrl_gdoe_reg>;
+		gpio = <&gpio3 21 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		regulator-always-on;
+	};
+
+	wifi_pwrseq: wifi_pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		pinctrl-names = "default", "sleep";
+		pinctrl-0 = <&pinctrl_wifi>;
+		pinctrl-1 = <&pinctrl_wifi>;
+		reset-gpios = <&gpio5 9 GPIO_ACTIVE_LOW>;
+		clocks = <&clks IMX7D_CLKO2_ROOT_DIV>;
+		clock-names = "ext_clock";
+	};
+};
+
+&clks {
+	assigned-clocks = <&clks IMX7D_CLKO2_ROOT_SRC>,
+			  <&clks IMX7D_CLKO2_ROOT_DIV>;
+	assigned-clock-parents = <&clks IMX7D_CKIL>;
+	assigned-clock-rates = <0>, <32768>;
+};
+
+&crypto {
+	status = "disabled";
+};
+
+&dma_apbh {
+	status = "disabled";
+};
+
+&sdma {
+	status = "okay";
+};
+
+&uart1 {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&pinctrl_uart1>;
+	pinctrl-1 = <&pinctrl_uart1>;
+	assigned-clocks = <&clks IMX7D_UART1_ROOT_SRC>;
+	assigned-clock-parents = <&clks IMX7D_OSC_24M_CLK>;
+	status = "okay";
+};
+
+&uart6 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_uart6>;
+	assigned-clocks = <&clks IMX7D_UART6_ROOT_SRC>;
+	assigned-clock-parents = <&clks IMX7D_OSC_24M_CLK>;
+	status = "okay";
+};
+
+&usbotg2 {
+	srp-disable;
+	hnp-disable;
+	asp-disable;
+	phy-charger-detection;
+	status = "okay";
+};
+
+&usdhc2 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	pinctrl-names = "default", "state_100mhz", "sleep";
+	pinctrl-0 = <&pinctrl_usdhc2>;
+	pinctrl-1 = <&pinctrl_usdhc2_100mhz>;
+	pinctrl-2 = <&pinctrl_usdhc2>;
+	mmc-pwrseq = <&wifi_pwrseq>;
+	vmmc-supply = <&reg_brcm>;
+	bus-width = <4>;
+	non-removable;
+	keep-power-in-suspend;
+	cap-power-off-card;
+	status = "okay";
+
+	brcmf: bcrmf@1 {
+		reg = <1>;
+		compatible = "brcm,bcm4329-fmac";
+	};
+};
+
+&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>;
+	assigned-clocks = <&clks IMX7D_USDHC3_ROOT_CLK>;
+	assigned-clock-rates = <400000000>;
+	bus-width = <8>;
+	non-removable;
+	status = "okay";
+};
+
+&wdog1 {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&pinctrl_wdog>;
+	pinctrl-1 = <&pinctrl_wdog>;
+	fsl,ext-reset-output;
+};
+
+&iomuxc_lpsr {
+	pinctrl_digitizer_reg: digitizerreggrp {
+		fsl,pins = <
+			/* DIGITIZER_PWR_EN */
+			MX7D_PAD_LPSR_GPIO1_IO06__GPIO1_IO6	0x14
+		>;
+	};
+};
+
+&iomuxc {
+	pinctrl_bd71815: bd71815grp {
+		fsl,pins = <
+			MX7D_PAD_SAI1_RX_SYNC__GPIO6_IO16	0x59
+		>;
+	};
+
+	pinctrl_uart1: uart1grp {
+		fsl,pins = <
+			MX7D_PAD_UART1_TX_DATA__UART1_DCE_TX	0x79
+			MX7D_PAD_UART1_RX_DATA__UART1_DCE_RX	0x79
+		>;
+	};
+
+	pinctrl_uart6: uart6grp {
+		fsl,pins = <
+			MX7D_PAD_EPDC_DATA09__UART6_DCE_TX		0x79
+			MX7D_PAD_EPDC_DATA08__UART6_DCE_RX		0x79
+		>;
+	};
+
+	pinctrl_usdhc2: usdhc2grp {
+		fsl,pins = <
+			MX7D_PAD_SD2_CMD__SD2_CMD		0x59
+			MX7D_PAD_SD2_CLK__SD2_CLK		0x19
+			MX7D_PAD_SD2_DATA0__SD2_DATA0		0x59
+			MX7D_PAD_SD2_DATA1__SD2_DATA1		0x59
+			MX7D_PAD_SD2_DATA2__SD2_DATA2		0x59
+			MX7D_PAD_SD2_DATA3__SD2_DATA3		0x59
+		>;
+	};
+
+	pinctrl_usdhc2_100mhz: usdhc2grp_100mhz {
+		fsl,pins = <
+			MX7D_PAD_SD2_CMD__SD2_CMD		0x5a
+			MX7D_PAD_SD2_CLK__SD2_CLK		0x1a
+			MX7D_PAD_SD2_DATA0__SD2_DATA0		0x5a
+			MX7D_PAD_SD2_DATA1__SD2_DATA1		0x5a
+			MX7D_PAD_SD2_DATA2__SD2_DATA2		0x5a
+			MX7D_PAD_SD2_DATA3__SD2_DATA3		0x5a
+		>;
+	};
+
+	pinctrl_usdhc2_200mhz: usdhc2grp_200mhz {
+		fsl,pins = <
+			MX7D_PAD_SD2_CMD__SD2_CMD		0x5b
+			MX7D_PAD_SD2_CLK__SD2_CLK		0x1b
+			MX7D_PAD_SD2_DATA0__SD2_DATA0		0x5b
+			MX7D_PAD_SD2_DATA1__SD2_DATA1		0x5b
+			MX7D_PAD_SD2_DATA2__SD2_DATA2		0x5b
+			MX7D_PAD_SD2_DATA3__SD2_DATA3		0x5b
+		>;
+	};
+
+
+	pinctrl_usdhc3: usdhc3grp {
+		fsl,pins = <
+			MX7D_PAD_SD3_CMD__SD3_CMD		0x59
+			MX7D_PAD_SD3_CLK__SD3_CLK		0x19
+			MX7D_PAD_SD3_DATA0__SD3_DATA0		0x59
+			MX7D_PAD_SD3_DATA1__SD3_DATA1		0x59
+			MX7D_PAD_SD3_DATA2__SD3_DATA2		0x59
+			MX7D_PAD_SD3_DATA3__SD3_DATA3		0x59
+			MX7D_PAD_SD3_DATA4__SD3_DATA4		0x59
+			MX7D_PAD_SD3_DATA5__SD3_DATA5		0x59
+			MX7D_PAD_SD3_DATA6__SD3_DATA6		0x59
+			MX7D_PAD_SD3_DATA7__SD3_DATA7		0x59
+			MX7D_PAD_SD3_STROBE__SD3_STROBE		0x19
+		>;
+	};
+
+	pinctrl_usdhc3_100mhz: usdhc3grp_100mhz {
+		fsl,pins = <
+			MX7D_PAD_SD3_CMD__SD3_CMD		0x5a
+			MX7D_PAD_SD3_CLK__SD3_CLK		0x1a
+			MX7D_PAD_SD3_DATA0__SD3_DATA0		0x5a
+			MX7D_PAD_SD3_DATA1__SD3_DATA1		0x5a
+			MX7D_PAD_SD3_DATA2__SD3_DATA2		0x5a
+			MX7D_PAD_SD3_DATA3__SD3_DATA3		0x5a
+			MX7D_PAD_SD3_DATA4__SD3_DATA4		0x5a
+			MX7D_PAD_SD3_DATA5__SD3_DATA5		0x5a
+			MX7D_PAD_SD3_DATA6__SD3_DATA6		0x5a
+			MX7D_PAD_SD3_DATA7__SD3_DATA7		0x5a
+			MX7D_PAD_SD3_STROBE__SD3_STROBE		0x1a
+		>;
+	};
+
+	pinctrl_usdhc3_200mhz: usdhc3grp_200mhz {
+		fsl,pins = <
+			MX7D_PAD_SD3_CMD__SD3_CMD		0x5b
+			MX7D_PAD_SD3_CLK__SD3_CLK		0x1b
+			MX7D_PAD_SD3_DATA0__SD3_DATA0		0x5b
+			MX7D_PAD_SD3_DATA1__SD3_DATA1		0x5b
+			MX7D_PAD_SD3_DATA2__SD3_DATA2		0x5b
+			MX7D_PAD_SD3_DATA3__SD3_DATA3		0x5b
+			MX7D_PAD_SD3_DATA4__SD3_DATA4		0x5b
+			MX7D_PAD_SD3_DATA5__SD3_DATA5		0x5b
+			MX7D_PAD_SD3_DATA6__SD3_DATA6		0x5b
+			MX7D_PAD_SD3_DATA7__SD3_DATA7		0x5b
+			MX7D_PAD_SD3_STROBE__SD3_STROBE		0x1b
+		>;
+	};
+
+	pinctrl_brcm_reg: brcmreggrp {
+		fsl,pins = <
+			/* WIFI_PWR_EN */
+			MX7D_PAD_SAI1_TX_BCLK__GPIO6_IO13	0x14
+		>;
+	};
+
+	pinctrl_wifi: wifigrp {
+		fsl,pins = <
+			/* WiFi Reg On */
+			MX7D_PAD_SD2_CD_B__GPIO5_IO9		0x00000014
+			/* WiFi Sleep 32k */
+			MX7D_PAD_SD1_WP__CCM_CLKO2		0x00000014
+		>;
+	};
+
+	pinctrl_wdog: wdoggrp {
+		fsl,pins = <
+			MX7D_PAD_ENET1_COL__WDOG1_WDOG_ANY	0x74
+		>;
+	};
+
+	pinctrl_touch_reg: touchreggrp {
+		fsl,pins = <
+			/* TOUCH_PWR_EN */
+			MX7D_PAD_GPIO1_IO11__GPIO1_IO11		0x14
+		>;
+	};
+
+	pinctrl_sdoe_reg: sdoereggrp {
+		fsl,pins = <
+			MX7D_PAD_LCD_DATA22__GPIO3_IO27		0x74
+		>;
+	};
+
+	pinctrl_gdoe_reg: gdoereggrp {
+		fsl,pins = <
+			MX7D_PAD_LCD_DATA16__GPIO3_IO21		0x74
+		>;
+	};
+};
-- 
2.29.2


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