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db820c: stop autoboot when vol- pressed

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Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
This commit is contained in:
Jorge Ramirez-Ortiz 2018-01-10 11:33:52 +01:00 committed by Tom Rini
parent e0cc0b6c6d
commit 100fb0bd99
3 changed files with 58 additions and 1 deletions
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19
arch/arm/dts/dragonboard820c-uboot.dtsi Normal file
View file

@ -0,0 +1,19 @@
/*
* U-Boot addition to handle Dragonboard 820c pins
*
* (C) Copyright 2017 Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
&pm8994_pon {
key_vol_down {
gpios = <&pm8994_pon 1 0>;
label = "key_vol_down";
};
key_power {
gpios = <&pm8994_pon 0 0>;
label = "key_power";
};
};

38
board/qualcomm/dragonboard820c/dragonboard820c.c
View file

@ -1,7 +1,7 @@
/*
* Board init file for Dragonboard 820C
*
* (C) Copyright 2017 Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@gmail.com>
* (C) Copyright 2017 Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
@ -14,6 +14,7 @@
#include <asm/io.h>
#include <linux/bitops.h>
#include <asm/psci.h>
#include <asm/gpio.h>
DECLARE_GLOBAL_DATA_PTR;
@ -125,3 +126,38 @@ int board_init(void)
void reset_cpu(ulong addr)
{
psci_system_reset();
}
/* Check for vol- button - if pressed - stop autoboot */
int misc_init_r(void)
{
struct udevice *pon;
struct gpio_desc resin;
int node, ret;
ret = uclass_get_device_by_name(UCLASS_GPIO, "pm8994_pon@800", &pon);
if (ret < 0) {
printf("Failed to find PMIC pon node. Check device tree\n");
return 0;
}
node = fdt_subnode_offset(gd->fdt_blob, dev_of_offset(pon),
"key_vol_down");
if (node < 0) {
printf("Failed to find key_vol_down node. Check device tree\n");
return 0;
}
if (gpio_request_by_name_nodev(offset_to_ofnode(node), "gpios", 0,
&resin, 0)) {
printf("Failed to request key_vol_down button.\n");
return 0;
}
if (dm_gpio_get_value(&resin)) {
env_set("bootdelay", "-1");
printf("Power button pressed - dropping to console.\n");
}
return 0;
}

2
include/configs/dragonboard820c.h
View file

@ -12,6 +12,8 @@
#include <linux/sizes.h>
#include <asm/arch/sysmap-apq8096.h>
#define CONFIG_MISC_INIT_R /* To stop autoboot */
/* Physical Memory Map */
#define CONFIG_NR_DRAM_BANKS 2