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 <nbd@xxxxxxxxxxx>
Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
---
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 96f1725..5398e3d 100644
--- a/drivers/usb/host/bcma-hcd.c
+++ b/drivers/usb/host/bcma-hcd.c
@@ -24,6 +24,8 @@
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
#include <linux/usb/ehci_pdriver.h>
#include <linux/usb/ohci_pdriver.h>
@@ -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;
--
2.1.4
--
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