omap3: cm-t35: move the USB hub reset code

Extract the USB hub reset code to a common location where it can be
reused by other compulab boards.

Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Reviewed-by: Tom Rini <trini@ti.com>

board/compulab/cm_t35/cm_t35.c

@@ -573,16 +573,7 @@ int ehci_hcd_init(int index, enum usb_init_type init,
 	u8 val;
 	int offset;
 
-	if (gpio_request(SB_T35_USB_HUB_RESET_GPIO, "SB-T35 usb hub reset")) {
-		printf("Error: can't obtain GPIO %d for SB-T35 usb hub reset",
-				SB_T35_USB_HUB_RESET_GPIO);
-		return -1;
-	}
-
-	gpio_direction_output(SB_T35_USB_HUB_RESET_GPIO, 0);
-	udelay(10);
-	gpio_set_value(SB_T35_USB_HUB_RESET_GPIO, 1);
-	udelay(1000);
+	cl_usb_hub_init(SB_T35_USB_HUB_RESET_GPIO, "sb-t35 hub rst");
 
 	offset = TWL4030_BASEADD_GPIO + TWL4030_GPIO_GPIODATADIR1;
 	twl4030_i2c_read_u8(TWL4030_CHIP_GPIO, offset, &val);
@@ -599,6 +590,7 @@ int ehci_hcd_init(int index, enum usb_init_type init,
 
 int ehci_hcd_stop(void)
 {
+	cl_usb_hub_deinit(SB_T35_USB_HUB_RESET_GPIO);
 	return omap_ehci_hcd_stop();
 }
 #endif /* CONFIG_USB_EHCI_OMAP */

board/compulab/common/common.c

@@ -8,6 +8,7 @@
 
 #include <common.h>
 #include <asm/bootm.h>
+#include <asm/gpio.h>
 
 #include "common.h"
 #include "eeprom.h"
@@ -23,3 +24,24 @@ void cl_print_pcb_info(void)
 
 	printf("PCB:   %u.%u\n", rev_major, rev_minor);
 }
+
+#ifdef CONFIG_CMD_USB
+int cl_usb_hub_init(int gpio, const char *label)
+{
+	if (gpio_request(gpio, label)) {
+		printf("Error: can't obtain GPIO%d for %s", gpio, label);
+		return -1;
+	}
+
+	gpio_direction_output(gpio, 0);
+	udelay(10);
+	gpio_set_value(gpio, 1);
+	udelay(1000);
+	return 0;
+}
+
+void cl_usb_hub_deinit(int gpio)
+{
+	gpio_free(gpio);
+}
+#endif

board/compulab/common/common.h

@@ -9,6 +9,19 @@
 #ifndef _CL_COMMON_
 #define _CL_COMMON_
 
+#include <asm/errno.h>
+
 void cl_print_pcb_info(void);
 
+#ifdef CONFIG_CMD_USB
+int cl_usb_hub_init(int gpio, const char *label);
+void cl_usb_hub_deinit(int gpio);
+#else /* !CONFIG_CMD_USB */
+static inline int cl_usb_hub_init(int gpio, const char *label)
+{
+	return -ENOSYS;
+}
+static inline void cl_usb_hub_deinit(int gpio) {}
+#endif /* CONFIG_CMD_USB */
+
 #endif /* _CL_COMMON_ */