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2bfdd113d0
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>
139 lines
2.8 KiB
Text
139 lines
2.8 KiB
Text
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
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/dts-v1/;
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#include <dt-bindings/gpio/gpio.h>
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#include "imx6q-ba16.dtsi"
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/ {
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model = "Advantech DMS-BA16";
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compatible = "advantech,imx6q-dms-ba16", "advantech,imx6q-ba16", "fsl,imx6q";
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reg_usb_otg_vbus: regulator-usbotgvbus {
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compatible = "regulator-fixed";
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regulator-name = "usb_otg_vbus";
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regulator-min-microvolt = <5000000>;
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regulator-max-microvolt = <5000000>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_usbotgvbus>;
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gpio = <&gpio4 15 GPIO_ACTIVE_HIGH>;
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enable-active-high;
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};
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sys_mclk: clock-sys-mclk {
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compatible = "fixed-clock";
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#clock-cells = <0>;
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clock-frequency = <22000000>;
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};
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sound {
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compatible = "fsl,imx6q-ba16-sgtl5000",
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"fsl,imx-audio-sgtl5000";
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model = "imx6q-ba16-sgtl5000";
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ssi-controller = <&ssi1>;
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audio-codec = <&sgtl5000>;
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audio-routing =
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"MIC_IN", "Mic Jack",
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"Mic Jack", "Mic Bias",
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"Headphone Jack", "HP_OUT";
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mux-int-port = <1>;
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mux-ext-port = <4>;
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};
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};
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&ecspi5 {
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cs-gpios = <&gpio1 17 GPIO_ACTIVE_LOW>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_ecspi5>;
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status = "okay";
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m25_eeprom: m25p80@0 {
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compatible = "atmel,at25256B", "atmel,at25";
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spi-max-frequency = <20000000>;
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size = <0x8000>;
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pagesize = <64>;
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reg = <0>;
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address-width = <16>;
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};
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};
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&iomuxc {
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pinctrl_i2c1_gpio: i2c1gpiogrp {
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fsl,pins = <
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MX6QDL_PAD_CSI0_DAT8__GPIO5_IO26 0x1b0b0
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MX6QDL_PAD_CSI0_DAT9__GPIO5_IO27 0x1b0b0
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>;
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};
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pinctrl_i2c2_gpio: i2c2gpiogrp {
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fsl,pins = <
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MX6QDL_PAD_KEY_COL3__GPIO4_IO12 0x1b0b0
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MX6QDL_PAD_KEY_ROW3__GPIO4_IO13 0x1b0b0
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>;
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};
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pinctrl_i2c3_gpio: i2c3gpiogrp {
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fsl,pins = <
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MX6QDL_PAD_GPIO_3__GPIO1_IO03 0x1b0b0
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MX6QDL_PAD_GPIO_6__GPIO1_IO06 0x1b0b0
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>;
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};
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pinctrl_usbotgvbus: usbotgvbusgrp {
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fsl,pins = <
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MX6QDL_PAD_ENET_RX_ER__USB_OTG_ID 0x17059
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MX6QDL_PAD_KEY_ROW4__GPIO4_IO15 0x000b0
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>;
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};
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};
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&i2c1 {
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clock-frequency = <100000>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_i2c1>;
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status = "okay";
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sgtl5000: codec@a {
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compatible = "fsl,sgtl5000";
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reg = <0x0a>;
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clocks = <&sys_mclk>;
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lrclk-strength = <0x3>;
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VDDA-supply = <®_1p8v>;
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VDDIO-supply = <®_3p3v>;
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};
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};
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&pwm2 {
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_pwm2>;
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status = "okay";
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};
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&sata {
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fsl,no-spread-spectrum;
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fsl,transmit-atten-16ths = <12>;
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fsl,transmit-boost-mdB = <3330>;
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fsl,transmit-level-mV = <1133>;
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fsl,receive-dpll-mode = <1>;
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status = "okay";
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};
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&usbotg {
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vbus-supply = <®_usb_otg_vbus>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_usbotg>;
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dr_mode = "otg";
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disable-over-current;
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status = "okay";
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};
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&usdhc4 {
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_usdhc4>;
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bus-width = <8>;
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cd-gpios = <&gpio6 11 GPIO_ACTIVE_LOW>;
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no-1-8-v;
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keep-power-in-suspend;
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wakeup-source;
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status = "okay";
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};
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