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Commit 603ab524 authored by Hema HK's avatar Hema HK Committed by Felipe Balbi
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usb: otg: TWL6030: OMAP4430: Adding SRP VBUS pulsing API 



Implement the start_srp API to generate the VBUS pulsing and assign it to
otg_transciever function pointer. This will be used by the link driver when
there is SRP initiation from user.

Signed-off-by: default avatarHema HK <hemahk@ti.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent c51e36dc

drivers/usb/otg/twl6030-usb.c

+15 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 
#include <linux/err.h>

#include <linux/notifier.h>

#include <linux/slab.h>

#include <linux/delay.h>



/* usb register definitions */

#define USB_VENDOR_ID_LSB		0x00
@@ -188,6 +189,19 @@ static int twl6030_phy_suspend(struct otg_transceiver *x, int suspend) 
	return 0;

}



static int twl6030_start_srp(struct otg_transceiver *x)

{

	struct twl6030_usb *twl = xceiv_to_twl(x);



	twl6030_writeb(twl, TWL_MODULE_USB, 0x24, USB_VBUS_CTRL_SET);

	twl6030_writeb(twl, TWL_MODULE_USB, 0x84, USB_VBUS_CTRL_SET);



	mdelay(100);

	twl6030_writeb(twl, TWL_MODULE_USB, 0xa0, USB_VBUS_CTRL_CLR);



	return 0;

}



static int twl6030_usb_ldo_init(struct twl6030_usb *twl)

{
@@ -403,6 +417,7 @@ static int __devinit twl6030_usb_probe(struct platform_device *pdev) 
	twl->otg.init		= twl6030_phy_init;

	twl->otg.shutdown	= twl6030_phy_shutdown;

	twl->otg.set_suspend	= twl6030_phy_suspend;

	twl->otg.start_srp	= twl6030_start_srp;



	/* init spinlock for workqueue */

	spin_lock_init(&twl->lock);