From 65d8cb523f1b59b91ce784d2616448fa5ef3030e Mon Sep 17 00:00:00 2001 From: Oleksandr Suvorov Date: Wed, 19 Feb 2020 16:56:56 +0200 Subject: spi: fsl-lpspi: remove unneeded array - replace the array with the shift operation - remove the extra comparing operation. Signed-off-by: Oleksandr Suvorov --- drivers/spi/spi-fsl-lpspi.c | 7 ++----- 1 file 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), -- cgit v1.2.3