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63 lines
1.6 KiB
Diff
63 lines
1.6 KiB
Diff
Subject: [PATCH] bcma-hcd: add support for controlling bus power through GPIO
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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---
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--- a/drivers/usb/host/bcma-hcd.c
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+++ b/drivers/usb/host/bcma-hcd.c
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@@ -23,6 +23,8 @@
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#include <linux/platform_device.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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+#include <linux/of.h>
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+#include <linux/of_gpio.h>
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#include <linux/usb/ehci_pdriver.h>
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#include <linux/usb/ohci_pdriver.h>
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@@ -205,7 +207,38 @@ static void bcma_hcd_init_chip_arm(struc
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iounmap(dmu);
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}
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+static void bcma_hci_platform_power_gpio(struct platform_device *dev, bool val)
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+{
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+ int gpio;
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+
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+ gpio = of_get_named_gpio(dev->dev.of_node, "vcc-gpio", 0);
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+ if (!gpio_is_valid(gpio))
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+ return;
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+
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+ if (val) {
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+ gpio_request(gpio, "bcma-hcd-gpio");
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+ gpio_set_value(gpio, 1);
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+ } else {
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+ gpio_set_value(gpio, 0);
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+ gpio_free(gpio);
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+ }
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+}
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+
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+static int bcma_hci_platform_power_on(struct platform_device *dev)
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+{
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+ bcma_hci_platform_power_gpio(dev, true);
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+ return 0;
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+}
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+
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+static void bcma_hci_platform_power_off(struct platform_device *dev)
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+{
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+ bcma_hci_platform_power_gpio(dev, false);
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+}
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+
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static const struct usb_ehci_pdata ehci_pdata = {
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+ .power_on = bcma_hci_platform_power_on,
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+ .power_suspend = bcma_hci_platform_power_off,
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+ .power_off = bcma_hci_platform_power_off,
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};
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static const struct usb_ohci_pdata ohci_pdata = {
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@@ -233,6 +266,7 @@ static struct platform_device *bcma_hcd_
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hci_dev->dev.parent = &dev->dev;
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hci_dev->dev.dma_mask = &hci_dev->dev.coherent_dma_mask;
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+ hci_dev->dev.of_node = dev->dev.of_node;
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ret = platform_device_add_resources(hci_dev, hci_res,
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ARRAY_SIZE(hci_res));
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