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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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3181788c3a
The GPIO pin connected to card detect was inverted twice: once by
the argument to the GPIO line itself where it was magically marked
as active low by the flag GPIO_ACTIVE_LOW (0x01) in the third cell,
and also marked active low AGAIN by explicitly stating
"cd-inverted" (a deprecated method).
After commit 78f87df2b4
"mmc: mmci: Use the common mmc DT parser" this results in the
line being inverted twice so it was effectively uninverted, while
the old code would not have this effect, instead disregarding the
flag on the GPIO line altogether, which is a bug. I admit the
semantics may be unclear but inverting twice is as good a
definition as any on how this should work.
So fix up the buggy device tree. Use proper #includes so the DTS
is clear and readable.
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
102 lines
2.0 KiB
Plaintext
102 lines
2.0 KiB
Plaintext
/*
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* Device Tree for the ST-Ericsson Nomadik S8815 board
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* Produced by Calao Systems
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*/
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/dts-v1/;
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#include "ste-nomadik-stn8815.dtsi"
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/ {
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model = "Calao Systems USB-S8815";
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compatible = "calaosystems,usb-s8815";
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chosen {
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bootargs = "root=/dev/ram0 console=ttyAMA1,115200n8 earlyprintk";
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};
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/* This is where the interrupt is routed on the S8815 board */
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external-bus@34000000 {
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ethernet@300 {
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interrupt-parent = <&gpio3>;
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interrupts = <8 0x1>;
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};
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};
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src@101e0000 {
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/* These chrystal drivers are not used on this board */
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disable-sxtalo;
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disable-mxtalo;
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};
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pinctrl {
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/* Hog CD pins */
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pinctrl-names = "default";
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pinctrl-0 = <&cd_default_mode>;
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mmcsd-cd {
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cd_default_mode: cd_default {
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cd_default_cfg1 {
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/* CD input GPIO */
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ste,pins = "GPIO111_H21";
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ste,input = <0>;
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};
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cd_default_cfg2 {
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/* CD GPIO biasing */
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ste,pins = "GPIO112_J21";
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ste,output = <0>;
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};
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};
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};
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user-led {
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user_led_default_mode: user_led_default {
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user_led_default_cfg {
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ste,pins = "GPIO2_C5";
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ste,output = <1>;
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};
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};
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};
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user-button {
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user_button_default_mode: user_button_default {
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user_button_default_cfg {
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ste,pins = "GPIO3_A4";
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ste,input = <0>;
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};
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};
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};
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};
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/* Custom board node with GPIO pins to active etc */
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usb-s8815 {
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/* This will bias the MMC/SD card detect line */
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mmcsd-gpio {
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gpios = <&gpio3 16 0x1>;
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};
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};
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/* The user LED on the board is set up to be used for heartbeat */
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leds {
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compatible = "gpio-leds";
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user-led {
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label = "user_led";
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gpios = <&gpio0 2 0x1>;
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default-state = "off";
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linux,default-trigger = "heartbeat";
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pinctrl-names = "default";
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pinctrl-0 = <&user_led_default_mode>;
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};
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};
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/* User key mapped in as "escape" */
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gpio-keys {
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compatible = "gpio-keys";
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user-button {
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label = "user_button";
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gpios = <&gpio0 3 0x1>;
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linux,code = <1>; /* KEY_ESC */
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gpio-key,wakeup;
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pinctrl-names = "default";
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pinctrl-0 = <&user_button_default_mode>;
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};
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};
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};
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