[PATCH] USB: isp116x-hcd: remove clock() and reset()

This patch removes support for user-provided platform-specific hardware reset
and clock starting/stopping functions. Hardware reset was needed earlier as
getting the software reset working was tricky due to the lack of documentation.
Recently, a number of people using isp116x have said the software reset is
working for them.

I haven't heard of anybody using the clock starting/stopping.
Signed-off-by: Olav Kongas <ok@artecdesign.ee>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/host/isp116x-hcd.c

@@ -1463,10 +1463,6 @@ static int isp116x_sw_reset(struct isp116x *isp116x)
 	return ret;
 }
 
-/*
-  Reset. Tries to perform platform-specific hardware
-  reset first; falls back to software reset.
-*/
 static int isp116x_reset(struct usb_hcd *hcd)
 {
 	struct isp116x *isp116x = hcd_to_isp116x(hcd);
@@ -1474,17 +1470,7 @@ static int isp116x_reset(struct usb_hcd *hcd)
 	u16 clkrdy = 0;
 	int ret = 0, timeout = 15 /* ms */ ;
 
-	if (isp116x->board && isp116x->board->reset) {
-		/* Hardware reset */
-		isp116x->board->reset(hcd->self.controller, 1);
-		msleep(10);
-		if (isp116x->board->clock)
-			isp116x->board->clock(hcd->self.controller, 1);
-		msleep(1);
-		isp116x->board->reset(hcd->self.controller, 0);
-	} else
-		ret = isp116x_sw_reset(isp116x);
-
+	ret = isp116x_sw_reset(isp116x);
 	if (ret)
 		return ret;
 
@@ -1501,10 +1487,7 @@ static int isp116x_reset(struct usb_hcd *hcd)
 		ERR("Clock not ready after 20ms\n");
 		/* After sw_reset the clock won't report to be ready, if
 		   H_WAKEUP pin is high. */
-		if (!isp116x->board || !isp116x->board->reset)
-			ERR("The driver does not support hardware wakeup.\n");
-			ERR("Please make sure that the H_WAKEUP pin "
-				"is pulled low!\n");
+		ERR("Please make sure that the H_WAKEUP pin is pulled low!\n");
 		ret = -ENODEV;
 	}
 	return ret;
@@ -1527,15 +1510,7 @@ static void isp116x_stop(struct usb_hcd *hcd)
 	isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_LPS);
 	spin_unlock_irqrestore(&isp116x->lock, flags);
 
-	/* Put the chip into reset state */
-	if (isp116x->board && isp116x->board->reset)
-		isp116x->board->reset(hcd->self.controller, 0);
-	else
-		isp116x_sw_reset(isp116x);
-
-	/* Stop the clock */
-	if (isp116x->board && isp116x->board->clock)
-		isp116x->board->clock(hcd->self.controller, 0);
+	isp116x_sw_reset(isp116x);
 }
 
 /*

include/linux/usb_isp116x.h

@@ -19,15 +19,6 @@ struct isp116x_platform_data {
 	   prevents stopping internal clock, increasing
 	   thereby power consumption in suspended state. */
 	unsigned remote_wakeup_enable:1;
-	/* Hardware reset set/clear. If implemented, this function must:
-	   if set == 0,   deassert chip's HW reset pin
-	   otherwise,     assert chip's HW reset pin       */
-	void (*reset) (struct device * dev, int set);
-	/* Hardware clock start/stop. If implemented, this function must:
-	   if start == 0,    stop the external clock
-	   otherwise,        start the external clock
-	 */
-	void (*clock) (struct device * dev, int start);
 	/* Inter-io delay (ns). The chip is picky about access timings; it
 	   expects at least:
 	   150ns delay between consecutive accesses to DATA_REG,