From: Jorge Ramirez-Ortiz jorge.ramirez-ortiz@linaro.org
Signed-off-by: Jorge Ramirez-Ortiz jorge.ramirez-ortiz@linaro.org --- arch/arm/dts/dragonboard820c-uboot.dtsi | 19 ++++++++++++ board/qualcomm/dragonboard820c/dragonboard820c.c | 37 +++++++++++++++++++++++- include/configs/dragonboard820c.h | 2 ++ 3 files changed, 57 insertions(+), 1 deletion(-) create mode 100644 arch/arm/dts/dragonboard820c-uboot.dtsi
diff --git a/arch/arm/dts/dragonboard820c-uboot.dtsi b/arch/arm/dts/dragonboard820c-uboot.dtsi new file mode 100644 index 0000000..167e72c --- /dev/null +++ b/arch/arm/dts/dragonboard820c-uboot.dtsi @@ -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"; + }; +}; diff --git a/board/qualcomm/dragonboard820c/dragonboard820c.c b/board/qualcomm/dragonboard820c/dragonboard820c.c index 8f40ba4..d4a20d2 100644 --- a/board/qualcomm/dragonboard820c/dragonboard820c.c +++ b/board/qualcomm/dragonboard820c/dragonboard820c.c @@ -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;
@@ -126,3 +127,37 @@ 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; +} diff --git a/include/configs/dragonboard820c.h b/include/configs/dragonboard820c.h index 76bcaf8..e0c3c0c 100644 --- a/include/configs/dragonboard820c.h +++ b/include/configs/dragonboard820c.h @@ -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