openwrt/target/linux/bcm53xx/patches-4.3/198-USB-bcma-fix-setting-VCC-GPIO-value.patch

From 7572673e06393b117f87b20b82be0518634d7042 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
Date: Sun, 21 Jun 2015 12:09:57 +0200
Subject: [PATCH v3 6/6] usb: bcma: fix setting VCC GPIO value
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It wasn't working (on most of devices?) without setting GPIO direction
and wasn't respecting ACTIVE_LOW flag.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
 drivers/usb/host/bcma-hcd.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

--- a/drivers/usb/host/bcma-hcd.c
+++ b/drivers/usb/host/bcma-hcd.c
@@ -26,6 +26,7 @@
 #include <linux/slab.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/usb/ehci_pdriver.h>
 #include <linux/usb/ohci_pdriver.h>
 #include <linux/usb/xhci_pdriver.h>
@@ -231,17 +232,22 @@ static void bcma_hcd_init_chip_arm(struc
 
 static void bcma_hci_platform_power_gpio(struct bcma_device *dev, bool val)
 {
+	enum of_gpio_flags of_flags;
 	int gpio;
 
-	gpio = of_get_named_gpio(dev->dev.of_node, "vcc-gpio", 0);
+	gpio = of_get_named_gpio_flags(dev->dev.of_node, "vcc-gpio", 0, &of_flags);
 	if (!gpio_is_valid(gpio))
 		return;
 
 	if (val) {
-		gpio_request(gpio, "bcma-hcd-gpio");
-		gpio_set_value(gpio, 1);
+		unsigned long flags = 0;
+		bool active_low = !!(of_flags & OF_GPIO_ACTIVE_LOW);
+
+		flags |= active_low ? GPIOF_ACTIVE_LOW : 0;
+		flags |= active_low ? GPIOF_INIT_LOW : GPIOF_INIT_HIGH;
+		gpio_request_one(gpio, flags, "bcma-hcd-gpio");
 	} else {
-		gpio_set_value(gpio, 0);
+		gpiod_set_value(gpio_to_desc(gpio), 0);
 		gpio_free(gpio);
 	}
 }