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Message-Id: <20210322130928.132-3-alistair@alistair23.me>
Date: Mon, 22 Mar 2021 09:09:27 -0400
From: Alistair Francis <alistair@...stair23.me>
To: arnd@...db.de, olof@...om.net, robh+dt@...nel.org,
shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
festevam@...il.com, linux-imx@....com
Cc: linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, alistair23@...il.com,
Alistair Francis <alistair@...stair23.me>
Subject: [PATCH v6 3/3] ARM: imx7d-remarkable2.dts: Initial device tree for reMarkable2
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 display.
WiFi is untested (no display or UART RX makes it hard to test), but
should work with the current upstream driver. As it's untested it's not
included in this commit.
Signed-off-by: Alistair Francis <alistair@...stair23.me>
---
v6:
- Remove unneeded disables (crypt and dma_apbh)
- Remove uneeded enables (sdma)
- Fixup memory entry
- Remove unused reference
arch/arm/boot/dts/Makefile | 1 +
arch/arm/boot/dts/imx7d-remarkable2.dts | 146 ++++++++++++++++++++++++
2 files changed, 147 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 8e5d4ab4e75e..dc8e378689af 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -660,6 +660,7 @@ dtb-$(CONFIG_SOC_IMX7D) += \
imx7d-pico-hobbit.dtb \
imx7d-pico-nymph.dtb \
imx7d-pico-pi.dtb \
+ imx7d-remarkable2.dtb \
imx7d-sbc-imx7.dtb \
imx7d-sdb.dtb \
imx7d-sdb-reva.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..8cbae656395c
--- /dev/null
+++ b/arch/arm/boot/dts/imx7d-remarkable2.dts
@@ -0,0 +1,146 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2015 Freescale Semiconductor, Inc.
+ * Copyright (C) 2019 reMarkable AS - http://www.remarkable.com/
+ *
+ */
+
+/dts-v1/;
+
+#include "imx7d.dtsi"
+
+/ {
+ model = "reMarkable 2.0";
+ compatible = "remarkable,imx7d-remarkable2", "fsl,imx7d";
+
+ chosen {
+ stdout-path = &uart6;
+ };
+
+ memory@...00000 {
+ device_type = "memory";
+ reg = <0x80000000 0x40000000>;
+ };
+};
+
+&clks {
+ assigned-clocks = <&clks IMX7D_CLKO2_ROOT_SRC>,
+ <&clks IMX7D_CLKO2_ROOT_DIV>;
+ assigned-clock-parents = <&clks IMX7D_CKIL>;
+ assigned-clock-rates = <0>, <32768>;
+};
+
+&snvs_pwrkey {
+ status = "okay";
+};
+
+&uart1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&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;
+ 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>;
+ assigned-clocks = <&clks IMX7D_USDHC3_ROOT_CLK>;
+ assigned-clock-rates = <400000000>;
+ bus-width = <8>;
+ non-removable;
+ status = "okay";
+};
+
+&wdog1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_wdog>;
+ fsl,ext-reset-output;
+};
+
+&iomuxc {
+ 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_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_wdog: wdoggrp {
+ fsl,pins = <
+ MX7D_PAD_ENET1_COL__WDOG1_WDOG_ANY 0x74
+ >;
+ };
+};
--
2.30.1
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