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

spi: imx: introduce fifo_size and has_dmamode in spi_imx_devtype_data 

Different ECSPI controller has different fifosize and DMA capability,
instead of calling functions to identify these information by check
devtype. add fifo_size and has_dmamode to spi_imx_devtype_data.
so that these information can be directly accessed.

Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
jiada wang 2017-06-08 14:16:00 +09:00 committed by Mark Brown
parent 5771a8c088
commit fd8d4e2d1f
1 changed files with 18 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/spi/spi-imx.c
View File

@ -74,6 +74,8 @@ struct spi_imx_devtype_data {
void (*trigger)(struct spi_imx_data *);
int (*rx_available)(struct spi_imx_data *);
void (*reset)(struct spi_imx_data *);
bool has_dmamode;
unsigned int fifo_size;
enum spi_imx_devtype devtype;
};
@ -125,11 +127,6 @@ static inline int is_imx51_ecspi(struct spi_imx_data *d)
return d->devtype_data->devtype == IMX51_ECSPI;
}
static inline unsigned spi_imx_get_fifosize(struct spi_imx_data *d)
{
return is_imx51_ecspi(d) ? 64 : 8;
}
#define MXC_SPI_BUF_RX(type) \
static void spi_imx_buf_rx_##type(struct spi_imx_data *spi_imx) \
{ \
@ -219,7 +216,7 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
if (bytes_per_word != 1 && bytes_per_word != 2 && bytes_per_word != 4)
return false;
for (i = spi_imx_get_fifosize(spi_imx) / 2; i > 0; i--) {
for (i = spi_imx->devtype_data->fifo_size / 2; i > 0; i--) {
if (!(transfer->len % (i * bytes_per_word)))
break;
}
@ -693,6 +690,8 @@ static struct spi_imx_devtype_data imx1_cspi_devtype_data = {
.trigger = mx1_trigger,
.rx_available = mx1_rx_available,
.reset = mx1_reset,
.fifo_size = 8,
.has_dmamode = false,
.devtype = IMX1_CSPI,
};
@ -702,6 +701,8 @@ static struct spi_imx_devtype_data imx21_cspi_devtype_data = {
.trigger = mx21_trigger,
.rx_available = mx21_rx_available,
.reset = mx21_reset,
.fifo_size = 8,
.has_dmamode = false,
.devtype = IMX21_CSPI,
};
@ -712,6 +713,8 @@ static struct spi_imx_devtype_data imx27_cspi_devtype_data = {
.trigger = mx21_trigger,
.rx_available = mx21_rx_available,
.reset = mx21_reset,
.fifo_size = 8,
.has_dmamode = false,
.devtype = IMX27_CSPI,
};
@ -721,6 +724,8 @@ static struct spi_imx_devtype_data imx31_cspi_devtype_data = {
.trigger = mx31_trigger,
.rx_available = mx31_rx_available,
.reset = mx31_reset,
.fifo_size = 8,
.has_dmamode = false,
.devtype = IMX31_CSPI,
};
@ -731,6 +736,8 @@ static struct spi_imx_devtype_data imx35_cspi_devtype_data = {
.trigger = mx31_trigger,
.rx_available = mx31_rx_available,
.reset = mx31_reset,
.fifo_size = 8,
.has_dmamode = true,
.devtype = IMX35_CSPI,
};
@ -740,6 +747,8 @@ static struct spi_imx_devtype_data imx51_ecspi_devtype_data = {
.trigger = mx51_ecspi_trigger,
.rx_available = mx51_ecspi_rx_available,
.reset = mx51_ecspi_reset,
.fifo_size = 64,
.has_dmamode = true,
.devtype = IMX51_ECSPI,
};
@ -791,7 +800,7 @@ static void spi_imx_chipselect(struct spi_device *spi, int is_active)
static void spi_imx_push(struct spi_imx_data *spi_imx)
{
while (spi_imx->txfifo < spi_imx_get_fifosize(spi_imx)) {
while (spi_imx->txfifo < spi_imx->devtype_data->fifo_size) {
if (!spi_imx->count)
break;
spi_imx->tx(spi_imx);
@ -938,7 +947,7 @@ static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data *spi_imx,
if (of_machine_is_compatible("fsl,imx6dl"))
return 0;
spi_imx->wml = spi_imx_get_fifosize(spi_imx) / 2;
spi_imx->wml = spi_imx->devtype_data->fifo_size / 2;
/* Prepare for TX DMA: */
master->dma_tx = dma_request_slave_channel_reason(dev, "tx");
@ -1262,7 +1271,7 @@ static int spi_imx_probe(struct platform_device *pdev)
* Only validated on i.mx35 and i.mx6 now, can remove the constraint
* if validated on other chips.
*/
if (is_imx35_cspi(spi_imx) || is_imx51_ecspi(spi_imx)) {
if (spi_imx->devtype_data->has_dmamode) {
ret = spi_imx_sdma_init(&pdev->dev, spi_imx, master);
if (ret == -EPROBE_DEFER)
goto out_clk_put;