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Subject: [PATCH] bcma-hcd: add support for controlling bus power through GPIO
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
---
--- a/drivers/usb/host/bcma-hcd.c
+++ b/drivers/usb/host/bcma-hcd.c
@@ -23,6 +23,8 @@
#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>
@@ -205,7 +207,38 @@ static void bcma_hcd_init_chip_arm(struc
iounmap(dmu);
}
+static void bcma_hci_platform_power_gpio(struct platform_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 int bcma_hci_platform_power_on(struct platform_device *dev)
+{
+ bcma_hci_platform_power_gpio(dev, true);
+ return 0;
+}
+
+static void bcma_hci_platform_power_off(struct platform_device *dev)
+{
+ bcma_hci_platform_power_gpio(dev, false);
+}
+
static const struct usb_ehci_pdata ehci_pdata = {
+ .power_on = bcma_hci_platform_power_on,
+ .power_suspend = bcma_hci_platform_power_off,
+ .power_off = bcma_hci_platform_power_off,
};
static const struct usb_ohci_pdata ohci_pdata = {
@@ -233,6 +266,7 @@ static struct platform_device *bcma_hcd_
hci_dev->dev.parent = &dev->dev;
hci_dev->dev.dma_mask = &hci_dev->dev.coherent_dma_mask;
+ hci_dev->dev.of_node = dev->dev.of_node;
ret = platform_device_add_resources(hci_dev, hci_res,
ARRAY_SIZE(hci_res));
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