spi: dw: refactor code that handles clk_div
This patch does the following changes:
a) the calculation of clk_div is simplified to oneliner;
b) chip->clk_div is updated if clk_div is not zero, therefore the condition is
simplified by using chip->clk_div in both cases;
c) while here, the redundant parentheses are removed.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c
index 0febb97..0e0c48b 100644
--- a/drivers/spi/spi-dw.c
+++ b/drivers/spi/spi-dw.c
@@ -416,12 +416,11 @@
if (transfer->speed_hz) {
speed = chip->speed_hz;
- if ((transfer->speed_hz != speed) || (!chip->clk_div)) {
+ if ((transfer->speed_hz != speed) || !chip->clk_div) {
speed = transfer->speed_hz;
/* clk_div doesn't support odd number */
- clk_div = dws->max_freq / speed;
- clk_div = (clk_div + 1) & 0xfffe;
+ clk_div = (dws->max_freq / speed + 1) & 0xfffe;
chip->speed_hz = speed;
chip->clk_div = clk_div;
@@ -480,7 +479,7 @@
if (dw_readw(dws, DW_SPI_CTRL0) != cr0)
dw_writew(dws, DW_SPI_CTRL0, cr0);
- spi_set_clk(dws, clk_div ? clk_div : chip->clk_div);
+ spi_set_clk(dws, chip->clk_div);
spi_chip_sel(dws, spi, 1);
/* Set the interrupt mask, for poll mode just disable all int */
