Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-28 07:01:32 +00:00
Code Issues Packages Projects Releases Wiki Activity

spi: spi-s3c64xx: Ensure cur_speed holds actual clock value

Browse Source 
Make sure the cur_speed value used in s3c64xx_enable_datapath()
to configure DMA channel and in s3c64xx_wait_for_*() to calculate the
transfer timeout is set to the actual value of (half) the clock speed.

Don't change non-CMU case, because no frequency calculation errors have
been reported.

Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Suggested-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
Link: https://lore.kernel.org/r/20201002122243.26849-8-l.stelmach@samsung.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Łukasz Stelmach 2020-10-02 14:22:41 +02:00 committed by Mark Brown
parent 58d5478143
commit 20b4016a3b
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/spi/spi-s3c64xx.c
View File

@ -626,6 +626,7 @@ static int s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
ret = clk_set_rate(sdd->src_clk, sdd->cur_speed * 2);
if (ret)
return ret;
sdd->cur_speed = clk_get_rate(sdd->src_clk) / 2;
} else {
/* Configure Clock */
val = readl(regs + S3C64XX_SPI_CLK_CFG);