[PACTH v2] spi: imx: add 16/32 bits per word support for target mode

carlos.song
2025-10-24T11:31:47Z

From: Carlos Song <carlos.song@nxp.com>

Now for ECSPI only support 8 bits per word in target mode.
Enable 16/32 bits per word support for spi-imx target mode.

Signed-off-by: Carlos Song <carlos.song@nxp.com>
Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
---
drivers/spi/spi-imx.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 155ddeb8fcd4..017f83f5dfdf 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -424,8 +424,12 @@ static void spi_imx_buf_tx_swap(struct spi_imx_data *spi_imx)

static void mx53_ecspi_rx_target(struct spi_imx_data *spi_imx)
{
- u32 val = ioread32be(spi_imx->base + MXC_CSPIRXDATA);
+ u32 val = readl(spi_imx->base + MXC_CSPIRXDATA);

+ if (spi_imx->bits_per_word <= 8)
+ swab32s(&val);
+ else if (spi_imx->bits_per_word <= 16)
+ swahw32s(&val);
if (spi_imx->rx_buf) {
int n_bytes = spi_imx->target_burst % sizeof(val);

@@ -453,12 +457,16 @@ static void mx53_ecspi_tx_target(struct spi_imx_data *spi_imx)
if (spi_imx->tx_buf) {
memcpy(((u8 *)&val) + sizeof(val) - n_bytes,
spi_imx->tx_buf, n_bytes);
+ if (spi_imx->bits_per_word <= 8)
+ swab32s(&val);
+ else if (spi_imx->bits_per_word <= 16)
+ swahw32s(&val);
spi_imx->tx_buf += n_bytes;
}

spi_imx->count -= n_bytes;

- iowrite32be(val, spi_imx->base + MXC_CSPITXDATA);
+ writel(val, spi_imx->base + MXC_CSPITXDATA);
}

/* MX51 eCSPI */
--
2.34.1