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Commit eb4861c3 authored by Hauke Mehrtens's avatar Hauke Mehrtens Committed by Greg Kroah-Hartman
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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: default avatarFelix Fietkau <nbd@openwrt.org>
Signed-off-by: default avatarHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 10bc04b7

drivers/usb/host/bcma-hcd.c

+24 −0
Original line number Diff line number Diff line
@@ -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;