83 lines
2.1 KiB
Diff
83 lines
2.1 KiB
Diff
|
From f3cf44a313b3687efd55ba091558e20a4d218c31 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Hauke Mehrtens <hauke@hauke-m.de>
|
||
|
|
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 <nbd@openwrt.org>
|
||
|
|
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
|
||
|
|
---
|
||
|
|
drivers/usb/host/bcma-hcd.c | 24 ++++++++++++++++++++++++
|
||
|
|
1 file changed, 24 insertions(+)
|
||
|
|
|
||
|
|
--- 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(struc
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
+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_de
|
||
|
|
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_
|
||
|
|
|
||
|
|
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 bcm
|
||
|
|
|
||
|
|
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_
|
||
|
|
|
||
|
|
static int bcma_hcd_resume(struct bcma_device *dev)
|
||
|
|
{
|
||
|
|
+ bcma_hci_platform_power_gpio(dev, true);
|
||
|
|
bcma_core_enable(dev, 0);
|
||
|
|
|
||
|
|
return 0;
|