hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

spi: s3c64xx: do not configure the device twice 

At the start of the transfer, the spi_config function is called
twice, the first time when the 3c64xx_spi_prepare_message is
called and the second time with the s3c64xx_spi_transfer_one,
both called from the spi framework.

Remove the first call at the prepare message because in that
point we don't have the imformation about "bit per word" and
frequency.

Signed-off-by: Andi Shyti <andi.shyti@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Andi Shyti 2016-06-28 11:41:13 +09:00 committed by Mark Brown
parent a92e7c3d82
commit 11f66f0927
1 changed files with 1 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/spi/spi-s3c64xx.c
View File

@ -676,16 +676,6 @@ static int s3c64xx_spi_prepare_message(struct spi_master *master,
struct spi_device *spi = msg->spi;
struct s3c64xx_spi_csinfo *cs = spi->controller_data;
/* If Master's(controller) state differs from that needed by Slave */
if (sdd->cur_speed != spi->max_speed_hz
|| sdd->cur_mode != spi->mode
|| sdd->cur_bpw != spi->bits_per_word) {
sdd->cur_bpw = spi->bits_per_word;
sdd->cur_speed = spi->max_speed_hz;
sdd->cur_mode = spi->mode;
s3c64xx_spi_config(sdd);
}
/* Configure feedback delay */
writel(cs->fb_delay & 0x3, sdd->regs + S3C64XX_SPI_FB_CLK);
@ -712,6 +702,7 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master,
if (bpw != sdd->cur_bpw || speed != sdd->cur_speed) {
sdd->cur_bpw = bpw;
sdd->cur_speed = speed;
sdd->cur_mode = spi->mode;
s3c64xx_spi_config(sdd);
}