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authorGeert Uytterhoeven <geert+renesas@glider.be>2019-04-02 16:40:22 +0200
committerMark Brown <broonie@kernel.org>2019-04-03 06:32:26 +0200
commit9115b4d89b213dc73fd35844e0199b1763f751d6 (patch)
treec32b3e9408185a955106cb9b67a00c7d45bbf078 /drivers/spi/spi-sh-msiof.c
parentspi: lpspi: add missing complete in abort func at dma mode (diff)
downloadlinux-9115b4d89b213dc73fd35844e0199b1763f751d6.tar.xz
linux-9115b4d89b213dc73fd35844e0199b1763f751d6.zip
spi: sh-msiof: Use readl_poll_timeout_atomic() instead of open-coding
Replace the open-coded loop in sh_msiof_modify_ctr_wait() by a call to the readl_poll_timeout_atomic() helper macro. Suggested-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-sh-msiof.c')
-rw-r--r--drivers/spi/spi-sh-msiof.c12
1 files changed, 3 insertions, 9 deletions
diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index 6edc76636e81..3243ff258896 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
@@ -18,6 +18,7 @@
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/io.h>
+#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
@@ -219,21 +220,14 @@ static int sh_msiof_modify_ctr_wait(struct sh_msiof_spi_priv *p,
{
u32 mask = clr | set;
u32 data;
- int k;
data = sh_msiof_read(p, CTR);
data &= ~clr;
data |= set;
sh_msiof_write(p, CTR, data);
- for (k = 100; k > 0; k--) {
- if ((sh_msiof_read(p, CTR) & mask) == set)
- break;
-
- udelay(10);
- }
-
- return k > 0 ? 0 : -ETIMEDOUT;
+ return readl_poll_timeout_atomic(p->mapbase + CTR, data,
+ (data & mask) == set, 10, 1000);
}
static irqreturn_t sh_msiof_spi_irq(int irq, void *data)