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e40d0706bf
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 for example:
[ 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>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
202 lines
4.2 KiB
Plaintext
202 lines
4.2 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright 2013 Sascha Hauer, Pengutronix
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* Copyright 2013-2017 Markus Niebel <Markus.Niebel@tq-group.com>
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*/
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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/ {
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reg_3p3v: regulator-3p3v {
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compatible = "regulator-fixed";
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regulator-name = "supply-3p3v";
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regulator-min-microvolt = <3300000>;
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regulator-max-microvolt = <3300000>;
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regulator-always-on;
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};
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};
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&ecspi1 {
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_ecspi1>;
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cs-gpios = <&gpio3 19 GPIO_ACTIVE_LOW>;
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status = "okay";
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m25p80: flash@0 {
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compatible = "jedec,spi-nor";
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spi-max-frequency = <50000000>;
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reg = <0>;
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#address-cells = <1>;
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#size-cells = <1>;
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m25p,fast-read;
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};
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};
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&iomuxc {
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pinctrl_ecspi1: ecspi1grp {
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fsl,pins = <
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/* HYS, SPEED = MED, 100k up, DSE = 011, SRE_FAST */
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MX6QDL_PAD_EIM_D17__ECSPI1_MISO 0x1b099
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MX6QDL_PAD_EIM_D18__ECSPI1_MOSI 0xb099
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MX6QDL_PAD_EIM_D16__ECSPI1_SCLK 0xb099
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/* eCSPI1 SS1 */
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MX6QDL_PAD_EIM_D19__GPIO3_IO19 0xb099
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>;
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};
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pinctrl_i2c1: i2c1grp {
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fsl,pins = <
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MX6QDL_PAD_CSI0_DAT8__I2C1_SDA 0x4001b899
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MX6QDL_PAD_CSI0_DAT9__I2C1_SCL 0x4001b899
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>;
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};
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pinctrl_i2c3: i2c3grp {
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fsl,pins = <
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MX6QDL_PAD_GPIO_5__I2C3_SCL 0x4001b899
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MX6QDL_PAD_GPIO_6__I2C3_SDA 0x4001b899
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>;
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};
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pinctrl_pmic: pmicgrp {
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fsl,pins = <
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MX6QDL_PAD_NANDF_RB0__GPIO6_IO10 0x1b099 /* PMIC irq */
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>;
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};
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pinctrl_usdhc3: usdhc3grp {
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fsl,pins = <
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MX6QDL_PAD_SD3_CMD__SD3_CMD 0x17059
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MX6QDL_PAD_SD3_CLK__SD3_CLK 0x10059
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MX6QDL_PAD_SD3_DAT0__SD3_DATA0 0x17059
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MX6QDL_PAD_SD3_DAT1__SD3_DATA1 0x17059
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MX6QDL_PAD_SD3_DAT2__SD3_DATA2 0x17059
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MX6QDL_PAD_SD3_DAT3__SD3_DATA3 0x17059
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MX6QDL_PAD_SD3_DAT4__SD3_DATA4 0x17059
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MX6QDL_PAD_SD3_DAT5__SD3_DATA5 0x17059
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MX6QDL_PAD_SD3_DAT6__SD3_DATA6 0x17059
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MX6QDL_PAD_SD3_DAT7__SD3_DATA7 0x17059
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>;
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};
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};
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&pmic {
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_pmic>;
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interrupt-parent = <&gpio6>;
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interrupts = <10 IRQ_TYPE_LEVEL_LOW>;
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regulators {
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reg_vddcore: sw1ab {
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regulator-min-microvolt = <300000>;
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regulator-max-microvolt = <1875000>;
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regulator-always-on;
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};
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reg_vddsoc: sw1c {
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regulator-min-microvolt = <300000>;
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regulator-max-microvolt = <1875000>;
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regulator-always-on;
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};
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reg_gen_3v3: sw2 {
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regulator-min-microvolt = <800000>;
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regulator-max-microvolt = <3300000>;
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regulator-always-on;
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};
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reg_ddr_1v5a: sw3a {
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regulator-min-microvolt = <400000>;
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regulator-max-microvolt = <1975000>;
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regulator-always-on;
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};
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reg_ddr_1v5b: sw3b {
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regulator-min-microvolt = <400000>;
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regulator-max-microvolt = <1975000>;
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regulator-always-on;
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};
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sw4_reg: sw4 {
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regulator-min-microvolt = <800000>;
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regulator-max-microvolt = <3300000>;
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regulator-always-on;
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};
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reg_5v_600mA: swbst {
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regulator-min-microvolt = <5000000>;
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regulator-max-microvolt = <5150000>;
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regulator-always-on;
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};
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reg_snvs_3v: vsnvs {
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regulator-min-microvolt = <1500000>;
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regulator-max-microvolt = <3000000>;
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regulator-always-on;
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};
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reg_vrefddr: vrefddr {
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regulator-boot-on;
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regulator-always-on;
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};
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reg_vgen1_1v5: vgen1 {
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regulator-min-microvolt = <800000>;
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regulator-max-microvolt = <1550000>;
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/* not used */
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};
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reg_vgen2_1v2_eth: vgen2 {
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regulator-min-microvolt = <800000>;
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regulator-max-microvolt = <1550000>;
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regulator-always-on;
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};
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reg_vgen3_2v8: vgen3 {
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <3300000>;
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regulator-always-on;
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};
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reg_vgen4_1v8: vgen4 {
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <3300000>;
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regulator-always-on;
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};
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reg_vgen5_1v8_eth: vgen5 {
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <3300000>;
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regulator-always-on;
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};
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reg_vgen6_3v3: vgen6 {
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <3300000>;
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regulator-always-on;
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};
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};
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};
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/* eMMC */
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&usdhc3 {
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_usdhc3>;
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vmmc-supply = <®_3p3v>;
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non-removable;
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disable-wp;
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no-sd;
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no-sdio;
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bus-width = <8>;
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#address-cells = <1>;
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#size-cells = <0>;
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status = "okay";
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mmccard: mmccard@0 {
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reg = <0>;
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compatible = "mmc-card";
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broken-hpi;
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};
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};
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