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MLK-20113 spi: ecspi: add pio spi slave mode for imx6ul 

Add pio spi slave mode support for imx6ul which is based on the patch
cherry-pick from community(71abd29057).

Because the original imx6ul is bound to mx51 in the dts file.
However, in the slave mode, the patch in the community only adds two
functions mx53_ecspi_rx_slave/mx53_ecspi_tx_slave. Therefore, configure
mx51/6ul to use these two functions for data transmission and reception
in slave mode.

Acked-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
pull/10/head
Clark Wang 2018-11-02 10:56:34 +08:00
parent 4773435e95
commit 55404c622a
1 changed files with 5 additions and 3 deletions
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8
drivers/spi/spi-imx.c
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@ -533,7 +533,7 @@ static int mx51_ecspi_config(struct spi_device *spi)
/* set chip select to use */
ctrl |= MX51_ECSPI_CTRL_CS(spi->chip_select);
if (spi_imx->slave_mode && is_imx53_ecspi(spi_imx))
if (spi_imx->slave_mode)
ctrl |= (spi_imx->slave_burst * 8 - 1)
<< MX51_ECSPI_CTRL_BL_OFFSET;
else
@ -987,6 +987,8 @@ static struct spi_imx_devtype_data imx6ul_ecspi_devtype_data = {
.fifo_size = 64,
.has_dmamode = true,
.dynamic_burst = true,
.has_slavemode = true,
.disable = mx51_ecspi_disable,
.devtype = IMX6UL_ECSPI,
};
@ -1186,7 +1188,7 @@ static int spi_imx_setupxfer(struct spi_device *spi,
else
spi_imx->usedma = 0;
if (is_imx53_ecspi(spi_imx) && spi_imx->slave_mode) {
if (spi_imx->slave_mode) {
spi_imx->rx = mx53_ecspi_rx_slave;
spi_imx->tx = mx53_ecspi_tx_slave;
spi_imx->slave_burst = t->len;
@ -1405,7 +1407,7 @@ static int spi_imx_pio_transfer_slave(struct spi_device *spi,
struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
int ret = transfer->len;
if (is_imx53_ecspi(spi_imx) &&
if ((is_imx51_ecspi(spi_imx) || is_imx53_ecspi(spi_imx)) &&
transfer->len > MX53_MAX_TRANSFER_BYTES) {
dev_err(&spi->dev, "Transaction too big, max size is %d bytes\n",
MX53_MAX_TRANSFER_BYTES);