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Staging: mt29f_spinand: Replace udelay function with usleep_range 

Use 'usleep_range' instead of 'udelay' to elapse time. For
spinand_reset, define the upper limit by a factor of 2 to keep the wait
short while still allowing a "good enough" range for wakeup. Define the
range 250us - 1ms for spinand_cmdfunc to provide enough leeway before
issuing spinand_reset. Checkpatch found this issue.

CHECK: usleep_range is preferred over udelay; see
Documentation/timers/timers-howto.txt

Signed-off-by: Eva Rachel Retuya <eraretuya@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Eva Rachel Retuya 2015-10-25 01:24:51 +08:00 committed by Greg Kroah-Hartman
parent d6a0692bef
commit c75e057744
1 changed files with 2 additions and 2 deletions
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4
drivers/staging/mt29f_spinand/mt29f_spinand.c
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@ -736,7 +736,7 @@ static void spinand_reset(struct spi_device *spi_nand)
pr_info("spinand reset failed!\n");
/* elapse 1ms before issuing any other command */
udelay(1000);
usleep_range(1000, 2000);
if (wait_till_ready(spi_nand))
dev_err(&spi_nand->dev, "wait timedout!\n");
@ -802,7 +802,7 @@ static void spinand_cmdfunc(struct mtd_info *mtd, unsigned int command,
if (wait_till_ready(info->spi))
dev_err(&info->spi->dev, "WAIT timedout!!!\n");
/* a minimum of 250us must elapse before issuing RESET cmd*/
udelay(250);
usleep_range(250, 1000);
spinand_reset(info->spi);
break;
default: