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authorOleksandr Suvorov <oleksandr.suvorov@toradex.com>2020-02-20 14:11:48 +0000
committerMark Brown <broonie@kernel.org>2020-03-03 14:47:18 +0000
commit2fa98705a9289c758b6154a22174aa8d4041a285 (patch)
tree33ab3232b06c7a4c5981151a67c9911d828fcd6a /drivers/spi/spi-fsl-lpspi.c
parent788bfc6eb6912df40a31245566b3e5c99ea7a66a (diff)
downloadlinux-2fa98705a9289c758b6154a22174aa8d4041a285.tar.bz2
spi: fsl-lpspi: remove unneeded array
- replace the array with the shift operation - remove the extra comparing operation. Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com> Link: https://lore.kernel.org/r/20200220141143.3902922-2-oleksandr.suvorov@toradex.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-fsl-lpspi.c')
-rw-r--r--drivers/spi/spi-fsl-lpspi.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c
index d0b8cc741a24..298329b781d2 100644
--- a/drivers/spi/spi-fsl-lpspi.c
+++ b/drivers/spi/spi-fsl-lpspi.c
@@ -86,8 +86,6 @@
#define TCR_RXMSK BIT(19)
#define TCR_TXMSK BIT(18)
-static int clkdivs[] = {1, 2, 4, 8, 16, 32, 64, 128};
-
struct lpspi_config {
u8 bpw;
u8 chip_select;
@@ -331,15 +329,14 @@ static int fsl_lpspi_set_bitrate(struct fsl_lpspi_data *fsl_lpspi)
}
for (prescale = 0; prescale < 8; prescale++) {
- scldiv = perclk_rate /
- (clkdivs[prescale] * config.speed_hz) - 2;
+ scldiv = perclk_rate / config.speed_hz / (1 << prescale) - 2;
if (scldiv < 256) {
fsl_lpspi->config.prescale = prescale;
break;
}
}
- if (prescale == 8 && scldiv >= 256)
+ if (scldiv >= 256)
return -EINVAL;
writel(scldiv | (scldiv << 8) | ((scldiv >> 1) << 16),