From: lyz <lyz@rock-chips.com>
Date: Wed, 29 Oct 2014 09:24:29 +0000 (+0800)
Subject: usb: implement power control by 'buspower' attribute
X-Git-Tag: firefly_0821_release~4473
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=18b8b4564e0b84e50e7809879e1a029fa149a51f;p=firefly-linux-kernel-4.4.55.git

usb: implement power control by 'buspower' attribute

This node is used for usb controller test application to enum usb
devices plugin and disconnect.
---

diff --git a/drivers/usb/dwc_otg_310/dwc_otg_attr.c b/drivers/usb/dwc_otg_310/dwc_otg_attr.c
index 989b655d150c..f071bf401473 100755
--- a/drivers/usb/dwc_otg_310/dwc_otg_attr.c
+++ b/drivers/usb/dwc_otg_310/dwc_otg_attr.c
@@ -580,10 +580,15 @@ static ssize_t buspower_store(struct device *_dev,
 			      struct device_attribute *attr,
 			      const char *buf, size_t count)
 {
-
 	dwc_otg_device_t *otg_dev = _dev->platform_data;
+	struct dwc_otg_platform_data *pldata = otg_dev->pldata;
 	uint32_t on = simple_strtoul(buf, NULL, 16);
+
+	if (on != 0 && on != 1)
+		return -EINVAL;
+
 	dwc_otg_set_prtpower(otg_dev->core_if, on);
+	pldata->power_enable(on);
 	return count;
 }
 
diff --git a/drivers/usb/dwc_otg_310/usbdev_rk32.c b/drivers/usb/dwc_otg_310/usbdev_rk32.c
index e0394614614a..84894be0ed0a 100755
--- a/drivers/usb/dwc_otg_310/usbdev_rk32.c
+++ b/drivers/usb/dwc_otg_310/usbdev_rk32.c
@@ -337,7 +337,8 @@ static void usb20host_power_enable(int enable)
 {
 	if (0 == enable) {
 		/* disable host_drv power */
-		/* do not disable power in default */
+		if (gpio_is_valid(control_usb->host_gpios->gpio))
+			gpio_set_value(control_usb->host_gpios->gpio, 0);
 	} else if (1 == enable) {
 		/* enable host_drv power */
 		if (gpio_is_valid(control_usb->host_gpios->gpio))