n810: Partially fix tahvo USB.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25908 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/omap24xx/patches-2.6.38/590-cbus-tahvo-usb-fixes.patch

@@ -0,0 +1,122 @@
+Index: linux-2.6.38-rc7/drivers/cbus/tahvo-usb.c
+===================================================================
+--- linux-2.6.38-rc7.orig/drivers/cbus/tahvo-usb.c	2011-03-06 23:00:14.411191087 +0100
++++ linux-2.6.38-rc7/drivers/cbus/tahvo-usb.c	2011-03-06 23:00:16.571473834 +0100
+@@ -98,6 +98,7 @@ struct tahvo_usb {
+ #ifdef CONFIG_USB_OTG
+ 	int tahvo_mode;
+ #endif
++	struct clk *ick;
+ };
+ static struct platform_device tahvo_usb_device;
+ 
+@@ -673,6 +674,14 @@ static int __init tahvo_usb_probe(struct
+ 	INIT_WORK(&tu->irq_work, tahvo_usb_irq_work);
+ 	mutex_init(&tu->serialize);
+ 
++	tu->ick = clk_get(NULL, "usb_l4_ick");
++	if (IS_ERR(tu->ick)) {
++		printk(KERN_ERR "Failed to get usb_l4_ick\n");
++		ret = PTR_ERR(tu->ick);
++		goto err_free_tu;
++	}
++	clk_enable(tu->ick);
++
+ 	/* Set initial state, so that we generate kevents only on
+ 	 * state changes */
+ 	tu->vbus_state = tahvo_read_reg(TAHVO_REG_IDSR) & 0x01;
+@@ -680,10 +689,9 @@ static int __init tahvo_usb_probe(struct
+ 	/* We cannot enable interrupt until omap_udc is initialized */
+ 	ret = tahvo_request_irq(TAHVO_INT_VBUSON, tahvo_usb_vbus_interrupt,
+ 				(unsigned long) tu, "vbus_interrupt");
+-	if (ret != 0) {
+-		kfree(tu);
++	if (ret) {
+ 		printk(KERN_ERR "Could not register Tahvo interrupt for VBUS\n");
+-		return ret;
++		goto err_release_clk;
+ 	}
+ 
+ 	/* Attributes */
+@@ -708,9 +716,7 @@ static int __init tahvo_usb_probe(struct
+ 	ret = otg_set_transceiver(&tu->otg);
+ 	if (ret < 0) {
+ 		printk(KERN_ERR "Cannot register USB transceiver\n");
+-		kfree(tu);
+-		tahvo_free_irq(TAHVO_INT_VBUSON);
+-		return ret;
++		goto err_free_irq;
+ 	}
+ 
+ 	dev_set_drvdata(dev, tu);
+@@ -719,10 +725,22 @@ static int __init tahvo_usb_probe(struct
+ 	 * may not be generated in addition to this. */
+ 	schedule_work(&tu->irq_work);
+ 	return 0;
++
++err_free_irq:
++	tahvo_free_irq(TAHVO_INT_VBUSON);
++err_release_clk:
++	clk_disable(tu->ick);
++	clk_put(tu->ick);
++err_free_tu:
++	kfree(tu);
++
++	return ret;
+ }
+ 
+ static int __exit tahvo_usb_remove(struct platform_device *pdev)
+ {
++	struct tahvo_usb *tu = platform_get_drvdata(pdev);
++
+ 	dev_dbg(&pdev->dev, "remove\n");
+ 
+ 	tahvo_free_irq(TAHVO_INT_VBUSON);
+@@ -732,6 +750,11 @@ static int __exit tahvo_usb_remove(struc
+ #ifdef CONFIG_USB_OTG
+ 	device_remove_file(&pdev->dev, &dev_attr_otg_mode);
+ #endif
++	clk_disable(tu->ick);
++	clk_put(tu->ick);
++
++	kfree(tu);
++
+ 	return 0;
+ }
+ 
+Index: linux-2.6.38-rc7/arch/arm/mach-omap2/board-n8x0.c
+===================================================================
+--- linux-2.6.38-rc7.orig/arch/arm/mach-omap2/board-n8x0.c	2011-03-06 23:00:14.388188076 +0100
++++ linux-2.6.38-rc7/arch/arm/mach-omap2/board-n8x0.c	2011-03-06 23:06:50.508033149 +0100
+@@ -40,6 +40,7 @@
+ #include <plat/serial.h>
+ #include <plat/cbus.h>
+ #include <plat/gpio-switch.h>
++#include <plat/usb.h>
+ 
+ #include "mux.h"
+ 
+@@ -395,6 +396,14 @@ static struct musb_hdrc_platform_data tu
+ 	.config		= &musb_config,
+ };
+ 
++static struct omap_usb_config n8x0_omap_usb_config __initdata = {
++	.otg		= 1,
++	.register_host	= 1,
++	.register_dev	= 1,
++	.hmc_mode	= 16,
++	.pins[0]	= 6,
++};
++
+ static void __init n8x0_usb_init(void)
+ {
+ 	int ret = 0;
+@@ -417,6 +426,8 @@ static void __init n8x0_usb_init(void)
+ 	if (ret != 0)
+ 		goto err;
+ 
++	omap2_usbfs_init(&n8x0_omap_usb_config);
++
+ 	printk(announce);
+ 
+ 	return;