diff options
| author | Oleksandr Suvorov <oleksandr.suvorov@toradex.com> | 2020-02-19 16:56:56 +0200 |
|---|---|---|
| committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2020-03-09 13:44:31 +0100 |
| commit | 2a7e678d4750a7bd6f7665647e16642575c11b7c (patch) | |
| tree | 6953f12a142aac5b1dfc78afb7a07c709bb1a49d /drivers | |
| parent | fd2bf9eda2a5931b8eb182e4dc2f9c765dfc3b97 (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>
Diffstat (limited to 'drivers')
| -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 bf254287e138..8d2ebdda4fe0 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), |