diff options
author | Oleksandr Suvorov <oleksandr.suvorov@toradex.com> | 2020-02-19 16:56:56 +0200 |
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committer | Oleksandr Suvorov <oleksandr.suvorov@toradex.com> | 2020-02-19 16:56:56 +0200 |
commit | 65d8cb523f1b59b91ce784d2616448fa5ef3030e (patch) | |
tree | a3a979896159ac6954db4264619e93524e3d0704 | |
parent | c256c0f81b8c030a833adb30f70dd3a2ea64601c (diff) |
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>
-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 97762e0bbc9d..7e7ec1c160e6 100644 --- a/drivers/spi/spi-fsl-lpspi.c +++ b/drivers/spi/spi-fsl-lpspi.c @@ -96,8 +96,6 @@ #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; @@ -335,15 +333,14 @@ 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), |