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| author | Oleksandr Suvorov <oleksandr.suvorov@toradex.com> | 2020-02-20 14:11:48 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-08-19 05:33:50 +0200 |
| commit | 3a5e84e6e492afa634f364964bff903ed7b80fde (patch) | |
| tree | 703424a6eef61f8b31897547e0a73b13dead6005 | |
| parent | abc71a9915911127e7e6a8478737f99161b64e87 (diff) | |
| download | linux-3a5e84e6e492afa634f364964bff903ed7b80fde.tar.gz linux-3a5e84e6e492afa634f364964bff903ed7b80fde.tar.bz2 linux-3a5e84e6e492afa634f364964bff903ed7b80fde.zip | |
spi: fsl-lpspi: remove unneeded array
[ Upstream commit 2fa98705a9289c758b6154a22174aa8d4041a285 ]
- 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>
Stable-dep-of: 730bbfaf7d48 ("spi: spi-fsl-lpspi: Fix scldiv calculation")
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/spi/spi-fsl-lpspi.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c index 58b2da91be1c..5351185fd9af 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), |