For USB3 host controller to detect devices on the bus it is required to enable a PMIC GPIO: usb_vbus_boost_pin. So enable that during board specific initialization.
And since this PMIC GPIO parsing is quite u-boot specific, so add a DT override to qcs404-evb-uboot.dtsi to represent usb_vbus_boost_pin.
Signed-off-by: Sumit Garg sumit.garg@linaro.org --- arch/arm/dts/qcs404-evb-uboot.dtsi | 6 ++++++ board/qualcomm/qcs404-evb/qcs404-evb.c | 29 ++++++++++++++++++++++++++ 2 files changed, 35 insertions(+)
diff --git a/arch/arm/dts/qcs404-evb-uboot.dtsi b/arch/arm/dts/qcs404-evb-uboot.dtsi index c18080a483..c73d71e8c7 100644 --- a/arch/arm/dts/qcs404-evb-uboot.dtsi +++ b/arch/arm/dts/qcs404-evb-uboot.dtsi @@ -22,3 +22,9 @@ }; }; }; + +&pms405_gpios { + usb_vbus_boost_pin { + gpios = <&pms405_gpios 2 0>; + }; +}; diff --git a/board/qualcomm/qcs404-evb/qcs404-evb.c b/board/qualcomm/qcs404-evb/qcs404-evb.c index f1e6e7f7eb..249dca7e72 100644 --- a/board/qualcomm/qcs404-evb/qcs404-evb.c +++ b/board/qualcomm/qcs404-evb/qcs404-evb.c @@ -11,6 +11,7 @@ #include <env.h> #include <init.h> #include <asm/cache.h> +#include <asm/gpio.h> #include <asm/global_data.h> #include <fdt_support.h> #include <asm/arch/dram.h> @@ -24,6 +25,34 @@ int dram_init(void)
int board_init(void) { + struct udevice *pmic_gpio; + struct gpio_desc usb_vbus_boost_pin; + int ret, node; + + ret = uclass_get_device_by_name(UCLASS_GPIO, + "pms405_gpios@c000", + &pmic_gpio); + if (ret < 0) { + printf("Failed to find pms405_gpios@c000 node.\n"); + return ret; + } + + node = fdt_subnode_offset(gd->fdt_blob, dev_of_offset(pmic_gpio), + "usb_vbus_boost_pin"); + if (node < 0) { + printf("Failed to find usb_hub_reset_pm dt node.\n"); + return node; + } + ret = gpio_request_by_name_nodev(offset_to_ofnode(node), "gpios", 0, + &usb_vbus_boost_pin, 0); + if (ret < 0) { + printf("Failed to request usb_hub_reset_pm gpio.\n"); + return ret; + } + + dm_gpio_set_dir_flags(&usb_vbus_boost_pin, + GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE); + return 0; }