From e42add561b6cfe1fa8a03a3ff64c72b5ea4a725f Mon Sep 17 00:00:00 2001 From: Chen-Yu Tsai Date: Mon, 9 Mar 2015 15:44:16 +0800 Subject: [PATCH] sunxi: musb: Support checking VBUS using AXP221 PMIC This enables the musb glue layer to use the AXP221's VBUS detection function to check for VBUS. This fixes otg support on the A23 q8h tablets. Note that u-boot never calls musb_shutdown(), so once VBUS is enabled, it is never disabled until the system is powered off, or the OS does so. This can be used to our advantage to keep VBUS powered into the OS, where support for AXP221 is not available yet. Fixes: 52defe8f6570 ("sunxi: musb: Check Vbus-det before enabling otg port power") Signed-off-by: Chen-Yu Tsai Acked-by: Hans de Goede Signed-off-by: Hans de Goede --- drivers/usb/musb-new/sunxi.c | 52 ++++++++++++++++++++++++++---------- 1 file changed, 38 insertions(+), 14 deletions(-) diff --git a/drivers/usb/musb-new/sunxi.c b/drivers/usb/musb-new/sunxi.c index fe45db1e06..4d8c15a5e0 100644 --- a/drivers/usb/musb-new/sunxi.c +++ b/drivers/usb/musb-new/sunxi.c @@ -27,6 +27,15 @@ #include #include "linux-compat.h" #include "musb_core.h" +#ifdef CONFIG_AXP152_POWER +#include +#endif +#ifdef CONFIG_AXP209_POWER +#include +#endif +#ifdef CONFIG_AXP221_POWER +#include +#endif /****************************************************************************** ****************************************************************************** @@ -228,29 +237,44 @@ static int sunxi_musb_init(struct musb *musb) if (is_host_enabled(musb)) { int vbus_det = sunxi_name_to_gpio(CONFIG_USB0_VBUS_DET); - if (vbus_det == -1) { - eprintf("Error invalid Vusb-det pin\n"); - return -EINVAL; - } - err = gpio_request(vbus_det, "vbus0_det"); - if (err) - return err; +#ifdef AXP_VBUS_DETECT + if (!strcmp(CONFIG_USB0_VBUS_DET, "axp_vbus_detect")) { + err = axp_get_vbus(); + if (err < 0) + return err; + } else { +#endif + if (vbus_det == -1) { + eprintf("Error invalid Vusb-det pin\n"); + return -EINVAL; + } + + err = gpio_request(vbus_det, "vbus0_det"); + if (err) + return err; + + err = gpio_direction_input(vbus_det); + if (err) { + gpio_free(vbus_det); + return err; + } + + err = gpio_get_value(vbus_det); + if (err) { + gpio_free(vbus_det); + return -EIO; + } - err = gpio_direction_input(vbus_det); - if (err) { gpio_free(vbus_det); - return err; +#ifdef AXP_VBUS_DETECT } +#endif - err = gpio_get_value(vbus_det); if (err) { eprintf("Error: A charger is plugged into the OTG\n"); - gpio_free(vbus_det); return -EIO; } - - gpio_free(vbus_det); } err = sunxi_usbc_request_resources(0); -- 2.25.1