diff options
| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2023-04-25 16:45:26 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-05-23 21:05:15 +0300 |
| commit | 8ce1bb9a5935385e9ef65bda1e8ca923c7fbb887 (patch) | |
| tree | 6276cf2818070b50f914aace853b956490ef280f /drivers/spi/spi-imx.c | |
| parent | d9032b304541e1f560349e461611f25d67f44a49 (diff) | |
| download | linux-8ce1bb9a5935385e9ef65bda1e8ca923c7fbb887.tar.xz | |
spi: spi-imx: set max_native_cs for imx51/imx53/imx6 variants
The ecspi IP block on imx51/imx53/imx6 have four native chip
selects. Tell that to the spi core so that any non-gpio chip selects
get validated against that upper bound.
Also set the SPI_MASTER_GPIO_SS so that the core verifies that, in the
case where both native and gpio chip selects are in use, there is at
least one leftover native chip select (or "channel", in the ecspi
language) for use by the slaves sitting on gpio chip selects.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Link: https://lore.kernel.org/r/20230425134527.483607-3-linux@rasmusvillemoes.dk
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-imx.c')
| -rw-r--r-- | drivers/spi/spi-imx.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index bed24f1cbd7b..bd6ddb142b13 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -1761,6 +1761,11 @@ static int spi_imx_probe(struct platform_device *pdev) */ controller->mode_bits |= SPI_CS_WORD; + if (is_imx51_ecspi(spi_imx) || is_imx53_ecspi(spi_imx)) { + controller->max_native_cs = 4; + controller->flags |= SPI_MASTER_GPIO_SS; + } + spi_imx->spi_drctl = spi_drctl; init_completion(&spi_imx->xfer_done); |