mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

spi: s3c64xx: Extract FIFO depth calculation to a dedicated macro 

Simplify the code by extracting all cases of FIFO depth calculation into
a dedicated macro. No functional change.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Link: https://msgid.link/r/20240120170001.3356-1-semen.protsenko@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Sam Protsenko 2024-01-20 11:00:01 -06:00 committed by Mark Brown
parent 50c4f8172d
commit 460efee706
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 6 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/spi/spi-s3c64xx.c
View File

@ -109,6 +109,7 @@
#define TX_FIFO_LVL(v, i) (((v) >> 6) & FIFO_LVL_MASK(i))
#define RX_FIFO_LVL(v, i) (((v) >> (i)->port_conf->rx_lvl_offset) & \
FIFO_LVL_MASK(i))
#define FIFO_DEPTH(i) ((FIFO_LVL_MASK(i) >> 1) + 1)
#define S3C64XX_SPI_MAX_TRAILCNT 0x3ff
#define S3C64XX_SPI_TRAILCNT_OFF 19
@ -406,7 +407,7 @@ static bool s3c64xx_spi_can_dma(struct spi_controller *host,
struct s3c64xx_spi_driver_data *sdd = spi_controller_get_devdata(host);
if (sdd->rx_dma.ch && sdd->tx_dma.ch) {
return xfer->len > (FIFO_LVL_MASK(sdd) >> 1) + 1;
return xfer->len > FIFO_DEPTH(sdd);
} else {
return false;
}
@ -495,9 +496,7 @@ static u32 s3c64xx_spi_wait_for_timeout(struct s3c64xx_spi_driver_data *sdd,
void __iomem *regs = sdd->regs;
unsigned long val = 1;
u32 status;
/* max fifo depth available */
u32 max_fifo = (FIFO_LVL_MASK(sdd) >> 1) + 1;
u32 max_fifo = FIFO_DEPTH(sdd);
if (timeout_ms)
val = msecs_to_loops(timeout_ms);
@ -604,7 +603,7 @@ static int s3c64xx_wait_for_pio(struct s3c64xx_spi_driver_data *sdd,
* For any size less than the fifo size the below code is
* executed atleast once.
*/
loops = xfer->len / ((FIFO_LVL_MASK(sdd) >> 1) + 1);
loops = xfer->len / FIFO_DEPTH(sdd);
buf = xfer->rx_buf;
do {
/* wait for data to be received in the fifo */
@ -741,7 +740,7 @@ static int s3c64xx_spi_transfer_one(struct spi_controller *host,
struct spi_transfer *xfer)
{
struct s3c64xx_spi_driver_data *sdd = spi_controller_get_devdata(host);
const unsigned int fifo_len = (FIFO_LVL_MASK(sdd) >> 1) + 1;
const unsigned int fifo_len = FIFO_DEPTH(sdd);
const void *tx_buf = NULL;
void *rx_buf = NULL;
int target_len = 0, origin_len = 0;
@ -1280,7 +1279,7 @@ static int s3c64xx_spi_probe(struct platform_device *pdev)
dev_dbg(&pdev->dev, "Samsung SoC SPI Driver loaded for Bus SPI-%d with %d Targets attached\n",
sdd->port_id, host->num_chipselect);
dev_dbg(&pdev->dev, "\tIOmem=[%pR]\tFIFO %dbytes\n",
mem_res, (FIFO_LVL_MASK(sdd) >> 1) + 1);
mem_res, FIFO_DEPTH(sdd));
pm_runtime_mark_last_busy(&pdev->dev);
pm_runtime_put_autosuspend(&pdev->dev);