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usb: xhci: convert to readx_poll_sleep_timeout()

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Use readx_poll_sleep_timeout() to poll the register status

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Chunfeng Yun 2020-09-08 19:00:03 +02:00 committed by Marek Vasut
parent 23a54ccfb6
commit a6837a0370
1 changed files with 10 additions and 13 deletions
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23
drivers/usb/host/xhci.c
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@ -33,6 +33,7 @@
#include <linux/bug.h> #include <linux/bug.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/errno.h> #include <linux/errno.h>
#include <linux/iopoll.h>
#include <usb/xhci.h> #include <usb/xhci.h>
#ifndef CONFIG_USB_MAX_CONTROLLER_COUNT #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
@ -143,23 +144,19 @@ struct xhci_ctrl *xhci_get_ctrl(struct usb_device *udev)
* @param usec time to wait till * @param usec time to wait till
* @return 0 if handshake is success else < 0 on failure * @return 0 if handshake is success else < 0 on failure
*/ */
static int handshake(uint32_t volatile *ptr, uint32_t mask, static int
uint32_t done, int usec) handshake(uint32_t volatile *ptr, uint32_t mask, uint32_t done, int usec)
{ {
uint32_t result; uint32_t result;
int ret;
do { ret = readx_poll_sleep_timeout(xhci_readl, ptr, result,
result = xhci_readl(ptr); (result & mask) == done || result == U32_MAX,
if (result == ~(uint32_t)0) 1, usec);
return -ENODEV; if (result == U32_MAX) /* card removed */
result &= mask; return -ENODEV;
if (result == done)
return 0;
usec--;
udelay(1);
} while (usec > 0);
return -ETIMEDOUT; return ret;
} }
/** /**