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linux-next/arch/arm/boot/dts/imx6ul-kontron-n6x1x-s.dtsi
Fabio Estevam 2bfdd113d0 ARM: dts: imx: Fix the SPI chipselect polarity 
The conversion of the spi-imx driver to use GPIO descriptors
in commit 8cdcd8aeee ("spi: imx/fsl-lpspi: Convert to GPIO descriptors")
helped to detect the following SPI chipselect polarity mismatch on an
imx6q-sabresd:

[    4.854337] m25p80@0 enforce active low on chipselect handle

Prior to the above commit, the chipselect polarity passed via cs-gpios
property was ignored and considered active-low.

The reason for such mismatch is clearly explained in the comments inside
drivers/gpio/gpiolib-of.c:

 * SPI children have active low chip selects
 * by default. This can be specified negatively
 * by just omitting "spi-cs-high" in the
 * device node, or actively by tagging on
 * GPIO_ACTIVE_LOW as flag in the device
 * tree. If the line is simultaneously
 * tagged as active low in the device tree
 * and has the "spi-cs-high" set, we get a
 * conflict and the "spi-cs-high" flag will
 * take precedence.

To properly represent the SPI chipselect polarity, change it to active-low
when the "spi-cs-high" property is absent.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2020-08-30 09:37:20 +08:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2017 exceet electronics GmbH
* Copyright (C) 2018 Kontron Electronics GmbH
* Copyright (c) 2019 Krzysztof Kozlowski <krzk@kernel.org>
*/
#include <dt-bindings/gpio/gpio.h>
/ {
gpio-leds {
compatible = "gpio-leds";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_gpio_leds>;
led1 {
label = "debug-led1";
gpios = <&gpio1 30 GPIO_ACTIVE_LOW>;
default-state = "off";
linux,default-trigger = "heartbeat";
};
led2 {
label = "debug-led2";
gpios = <&gpio5 3 GPIO_ACTIVE_LOW>;
default-state = "off";
};
led3 {
label = "debug-led3";
gpios = <&gpio5 2 GPIO_ACTIVE_LOW>;
default-state = "off";
};
};
pwm-beeper {
compatible = "pwm-beeper";
pwms = <&pwm8 0 5000>;
};
reg_3v3: regulator-3v3 {
compatible = "regulator-fixed";
regulator-name = "3v3";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
};
reg_5v: regulator-5v {
compatible = "regulator-fixed";
regulator-name = "5v";
regulator-min-microvolt = <5000000>;
regulator-max-microvolt = <5000000>;
};
reg_usb_otg1_vbus: regulator-usb-otg1-vbus {
compatible = "regulator-fixed";
regulator-name = "usb_otg1_vbus";
regulator-min-microvolt = <5000000>;
regulator-max-microvolt = <5000000>;
gpio = <&gpio1 4 GPIO_ACTIVE_HIGH>;
enable-active-high;
};
reg_vref_adc: regulator-vref-adc {
compatible = "regulator-fixed";
regulator-name = "vref-adc";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
};
};
&adc1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_adc1>;
num-channels = <3>;
vref-supply = <&reg_vref_adc>;
status = "okay";
};
&can2 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_flexcan2>;
status = "okay";
};
&ecspi1 {
cs-gpios = <&gpio4 26 GPIO_ACTIVE_LOW>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ecspi1>;
status = "okay";
eeprom@0 {
compatible = "anvo,anv32e61w", "atmel,at25";
reg = <0>;
spi-max-frequency = <20000000>;
spi-cpha;
spi-cpol;
pagesize = <1>;
size = <8192>;
address-width = <16>;
};
};
&fec1 {
pinctrl-0 = <&pinctrl_enet1>;
/delete-node/ mdio;
};
&fec2 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_enet2 &pinctrl_enet2_mdio>;
phy-mode = "rmii";
phy-handle = <&ethphy2>;
status = "okay";
mdio {
#address-cells = <1>;
#size-cells = <0>;
ethphy1: ethernet-phy@1 {
reg = <1>;
micrel,led-mode = <0>;
clocks = <&clks IMX6UL_CLK_ENET_REF>;
clock-names = "rmii-ref";
};
ethphy2: ethernet-phy@2 {
reg = <2>;
micrel,led-mode = <0>;
clocks = <&clks IMX6UL_CLK_ENET2_REF>;
clock-names = "rmii-ref";
};
};
};
&i2c1 {
clock-frequency = <100000>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_i2c1>;
status = "okay";
};
&i2c4 {
clock-frequency = <100000>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_i2c4>;
status = "okay";
rtc@32 {
compatible = "epson,rx8900";
reg = <0x32>;
};
};
&pwm8 {
#pwm-cells = <2>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_pwm8>;
status = "okay";
};
&uart1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart1>;
status = "okay";
};
&uart2 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart2>;
linux,rs485-enabled-at-boot-time;
rs485-rx-during-tx;
rs485-rts-active-low;
uart-has-rtscts;
status = "okay";
};
&uart3 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart3>;
fsl,uart-has-rtscts;
status = "okay";
};
&uart4 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart4>;
status = "okay";
};
&usbotg1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usbotg1>;
dr_mode = "otg";
srp-disable;
hnp-disable;
adp-disable;
over-current-active-low;
vbus-supply = <&reg_usb_otg1_vbus>;
status = "okay";
};
&usbotg2 {
dr_mode = "host";
disable-over-current;
vbus-supply = <&reg_5v>;
status = "okay";
};
&usdhc1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usdhc1>;
cd-gpios = <&gpio1 19 GPIO_ACTIVE_LOW>;
keep-power-in-suspend;
wakeup-source;
vmmc-supply = <&reg_3v3>;
voltage-ranges = <3300 3300>;
no-1-8-v;
status = "okay";
};
&usdhc2 {
pinctrl-names = "default", "state_100mhz", "state_200mhz";
pinctrl-0 = <&pinctrl_usdhc2>;
pinctrl-1 = <&pinctrl_usdhc2_100mhz>;
pinctrl-2 = <&pinctrl_usdhc2_200mhz>;
non-removable;
keep-power-in-suspend;
wakeup-source;
vmmc-supply = <&reg_3v3>;
voltage-ranges = <3300 3300>;
no-1-8-v;
status = "okay";
};
&iomuxc {
pinctrl-0 = <&pinctrl_reset_out &pinctrl_gpio>;
pinctrl_adc1: adc1grp {
fsl,pins = <
MX6UL_PAD_GPIO1_IO02__GPIO1_IO02 0xb0
MX6UL_PAD_GPIO1_IO03__GPIO1_IO03 0xb0
MX6UL_PAD_GPIO1_IO08__GPIO1_IO08 0xb0
>;
};
pinctrl_ecspi1: ecspi1grp {
fsl,pins = <
MX6UL_PAD_CSI_DATA07__ECSPI1_MISO 0x100b1
MX6UL_PAD_CSI_DATA06__ECSPI1_MOSI 0x100b1
MX6UL_PAD_CSI_DATA04__ECSPI1_SCLK 0x100b1
MX6UL_PAD_CSI_DATA05__GPIO4_IO26 0x100b1 /* ECSPI1-CS1 */
>;
};
pinctrl_enet2: enet2grp {
fsl,pins = <
MX6UL_PAD_ENET2_RX_EN__ENET2_RX_EN 0x1b0b0
MX6UL_PAD_ENET2_RX_ER__ENET2_RX_ER 0x1b0b0
MX6UL_PAD_ENET2_RX_DATA0__ENET2_RDATA00 0x1b0b0
MX6UL_PAD_ENET2_RX_DATA1__ENET2_RDATA01 0x1b0b0
MX6UL_PAD_ENET2_TX_EN__ENET2_TX_EN 0x1b0b0
MX6UL_PAD_ENET2_TX_DATA0__ENET2_TDATA00 0x1b0b0
MX6UL_PAD_ENET2_TX_DATA1__ENET2_TDATA01 0x1b0b0
MX6UL_PAD_ENET2_TX_CLK__ENET2_REF_CLK2 0x4001b009
>;
};
pinctrl_enet2_mdio: enet2mdiogrp {
fsl,pins = <
MX6UL_PAD_GPIO1_IO07__ENET2_MDC 0x1b0b0
MX6UL_PAD_GPIO1_IO06__ENET2_MDIO 0x1b0b0
>;
};
pinctrl_flexcan2: flexcan2grp{
fsl,pins = <
MX6UL_PAD_UART2_RTS_B__FLEXCAN2_RX 0x1b020
MX6UL_PAD_UART2_CTS_B__FLEXCAN2_TX 0x1b020
>;
};
pinctrl_gpio: gpiogrp {
fsl,pins = <
MX6UL_PAD_SNVS_TAMPER5__GPIO5_IO05 0x1b0b0 /* DOUT1 */
MX6UL_PAD_SNVS_TAMPER4__GPIO5_IO04 0x1b0b0 /* DIN1 */
MX6UL_PAD_SNVS_TAMPER1__GPIO5_IO01 0x1b0b0 /* DOUT2 */
MX6UL_PAD_SNVS_TAMPER0__GPIO5_IO00 0x1b0b0 /* DIN2 */
>;
};
pinctrl_gpio_leds: gpioledsgrp {
fsl,pins = <
MX6UL_PAD_UART5_TX_DATA__GPIO1_IO30 0x1b0b0 /* LED H14 */
MX6UL_PAD_SNVS_TAMPER3__GPIO5_IO03 0x1b0b0 /* LED H15 */
MX6UL_PAD_SNVS_TAMPER2__GPIO5_IO02 0x1b0b0 /* LED H16 */
>;
};
pinctrl_i2c1: i2c1grp {
fsl,pins = <
MX6UL_PAD_CSI_PIXCLK__I2C1_SCL 0x4001b8b0
MX6UL_PAD_CSI_MCLK__I2C1_SDA 0x4001b8b0
>;
};
pinctrl_i2c4: i2c4grp {
fsl,pins = <
MX6UL_PAD_UART2_TX_DATA__I2C4_SCL 0x4001f8b0
MX6UL_PAD_UART2_RX_DATA__I2C4_SDA 0x4001f8b0
>;
};
pinctrl_pwm8: pwm8grp {
fsl,pins = <
MX6UL_PAD_CSI_HSYNC__PWM8_OUT 0x110b0
>;
};
pinctrl_uart1: uart1grp {
fsl,pins = <
MX6UL_PAD_UART1_TX_DATA__UART1_DCE_TX 0x1b0b1
MX6UL_PAD_UART1_RX_DATA__UART1_DCE_RX 0x1b0b1
>;
};
pinctrl_uart2: uart2grp {
fsl,pins = <
MX6UL_PAD_NAND_DATA04__UART2_DCE_TX 0x1b0b1
MX6UL_PAD_NAND_DATA05__UART2_DCE_RX 0x1b0b1
MX6UL_PAD_NAND_DATA06__UART2_DCE_CTS 0x1b0b1
/*
* mux unused RTS to make sure it doesn't cause
* any interrupts when it is undefined
*/
MX6UL_PAD_NAND_DATA07__UART2_DCE_RTS 0x1b0b1
>;
};
pinctrl_uart3: uart3grp {
fsl,pins = <
MX6UL_PAD_UART3_TX_DATA__UART3_DCE_TX 0x1b0b1
MX6UL_PAD_UART3_RX_DATA__UART3_DCE_RX 0x1b0b1
MX6UL_PAD_UART3_CTS_B__UART3_DCE_CTS 0x1b0b1
MX6UL_PAD_UART3_RTS_B__UART3_DCE_RTS 0x1b0b1
>;
};
pinctrl_uart4: uart4grp {
fsl,pins = <
MX6UL_PAD_UART4_TX_DATA__UART4_DCE_TX 0x1b0b1
MX6UL_PAD_UART4_RX_DATA__UART4_DCE_RX 0x1b0b1
>;
};
pinctrl_usbotg1: usbotg1 {
fsl,pins = <
MX6UL_PAD_GPIO1_IO04__GPIO1_IO04 0x1b0b0
>;
};
pinctrl_usdhc1: usdhc1grp {
fsl,pins = <
MX6UL_PAD_SD1_CMD__USDHC1_CMD 0x17059
MX6UL_PAD_SD1_CLK__USDHC1_CLK 0x10059
MX6UL_PAD_SD1_DATA0__USDHC1_DATA0 0x17059
MX6UL_PAD_SD1_DATA1__USDHC1_DATA1 0x17059
MX6UL_PAD_SD1_DATA2__USDHC1_DATA2 0x17059
MX6UL_PAD_SD1_DATA3__USDHC1_DATA3 0x17059
MX6UL_PAD_UART1_RTS_B__GPIO1_IO19 0x100b1 /* SD1_CD */
>;
};
pinctrl_usdhc2: usdhc2grp {
fsl,pins = <
MX6UL_PAD_NAND_RE_B__USDHC2_CLK 0x10059
MX6UL_PAD_NAND_WE_B__USDHC2_CMD 0x17059
MX6UL_PAD_NAND_DATA00__USDHC2_DATA0 0x17059
MX6UL_PAD_NAND_DATA01__USDHC2_DATA1 0x17059
MX6UL_PAD_NAND_DATA02__USDHC2_DATA2 0x17059
MX6UL_PAD_NAND_DATA03__USDHC2_DATA3 0x17059
>;
};
pinctrl_usdhc2_100mhz: usdhc2-100mhzgrp {
fsl,pins = <
MX6UL_PAD_NAND_RE_B__USDHC2_CLK 0x100b9
MX6UL_PAD_NAND_WE_B__USDHC2_CMD 0x170b9
MX6UL_PAD_NAND_DATA00__USDHC2_DATA0 0x170b9
MX6UL_PAD_NAND_DATA01__USDHC2_DATA1 0x170b9
MX6UL_PAD_NAND_DATA02__USDHC2_DATA2 0x170b9
MX6UL_PAD_NAND_DATA03__USDHC2_DATA3 0x170b9
>;
};
pinctrl_usdhc2_200mhz: usdhc2-200mhzgrp {
fsl,pins = <
MX6UL_PAD_NAND_RE_B__USDHC2_CLK 0x100f9
MX6UL_PAD_NAND_WE_B__USDHC2_CMD 0x170f9
MX6UL_PAD_NAND_DATA00__USDHC2_DATA0 0x170f9
MX6UL_PAD_NAND_DATA01__USDHC2_DATA1 0x170f9
MX6UL_PAD_NAND_DATA02__USDHC2_DATA2 0x170f9
MX6UL_PAD_NAND_DATA03__USDHC2_DATA3 0x170f9
>;
};
};
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