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usb: gadget: bdc: use readl_poll_timeout() to simplify code

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Use readl_poll_timeout() to poll register status

Cc: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
This commit is contained in:
Chunfeng Yun 2020-07-13 14:48:01 +08:00 committed by Felipe Balbi
parent 33a06f1300
commit 75ae051efc
1 changed files with 11 additions and 15 deletions
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26
drivers/usb/gadget/udc/bdc/bdc_core.c
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@ -12,6 +12,7 @@
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/iopoll.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <linux/list.h>
@ -29,24 +30,19 @@
#include "bdc_dbg.h"
/* Poll till controller status is not OIP */
static int poll_oip(struct bdc *bdc, int usec)
static int poll_oip(struct bdc *bdc, u32 usec)
{
u32 status;
/* Poll till STS!= OIP */
while (usec) {
status = bdc_readl(bdc->regs, BDC_BDCSC);
if (BDC_CSTS(status) != BDC_OIP) {
dev_dbg(bdc->dev,
"poll_oip complete status=%d",
BDC_CSTS(status));
return 0;
}
udelay(10);
usec -= 10;
}
dev_err(bdc->dev, "Err: operation timedout BDCSC: 0x%08x\n", status);
int ret;
return -ETIMEDOUT;
ret = readl_poll_timeout(bdc->regs + BDC_BDCSC, status,
(BDC_CSTS(status) != BDC_OIP), 10, usec);
if (ret)
dev_err(bdc->dev, "operation timedout BDCSC: 0x%08x\n", status);
else
dev_dbg(bdc->dev, "%s complete status=%d", __func__, BDC_CSTS(status));
return ret;
}
/* Stop the BDC controller */