From f3cf44a313b3687efd55ba091558e20a4d218c31 Mon Sep 17 00:00:00 2001 From: Hauke Mehrtens Date: Thu, 11 Jun 2015 22:57:40 +0200 Subject: [PATCH] USB: bcma: add support for controlling bus power through GPIO On some boards a GPIO is needed to activate USB controller. Make it possible to specify such a GPIO in device tree. Signed-off-by: Felix Fietkau Signed-off-by: Hauke Mehrtens --- drivers/usb/host/bcma-hcd.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/usb/host/bcma-hcd.c b/drivers/usb/host/bcma-hcd.c index 983bc67..a01c6ce 100644 --- a/drivers/usb/host/bcma-hcd.c +++ b/drivers/usb/host/bcma-hcd.c @@ -24,6 +24,8 @@ #include #include #include +#include +#include #include #include @@ -224,6 +226,23 @@ static void bcma_hcd_init_chip_arm(struct bcma_device *dev) } } +static void bcma_hci_platform_power_gpio(struct bcma_device *dev, bool val) +{ + int gpio; + + gpio = of_get_named_gpio(dev->dev.of_node, "vcc-gpio", 0); + if (!gpio_is_valid(gpio)) + return; + + if (val) { + gpio_request(gpio, "bcma-hcd-gpio"); + gpio_set_value(gpio, 1); + } else { + gpio_set_value(gpio, 0); + gpio_free(gpio); + } +} + static const struct usb_ehci_pdata ehci_pdata = { }; @@ -295,6 +314,8 @@ static int bcma_hcd_probe(struct bcma_device *dev) if (!usb_dev) return -ENOMEM; + bcma_hci_platform_power_gpio(dev, true); + switch (dev->id.id) { case BCMA_CORE_NS_USB20: bcma_hcd_init_chip_arm(dev); @@ -347,6 +368,7 @@ static void bcma_hcd_remove(struct bcma_device *dev) static void bcma_hcd_shutdown(struct bcma_device *dev) { + bcma_hci_platform_power_gpio(dev, false); bcma_core_disable(dev, 0); } @@ -354,6 +376,7 @@ static void bcma_hcd_shutdown(struct bcma_device *dev) static int bcma_hcd_suspend(struct bcma_device *dev) { + bcma_hci_platform_power_gpio(dev, false); bcma_core_disable(dev, 0); return 0; @@ -361,6 +384,7 @@ static int bcma_hcd_suspend(struct bcma_device *dev) static int bcma_hcd_resume(struct bcma_device *dev) { + bcma_hci_platform_power_gpio(dev, true); bcma_core_enable(dev, 0); return 0; -- 1.8.4.5