| Message ID | 20230425134527.483607-3-linux@rasmusvillemoes.dk |
|---|---|
| State | Accepted |
| Commit | 8ce1bb9a5935385e9ef65bda1e8ca923c7fbb887 |
| Headers | show |
| Series | spi: spi-imx: fix use of more than four chip selects | expand |
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 6fa53a82674a..e8f7afbd9847 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -1749,6 +1749,11 @@ 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);
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> --- drivers/spi/spi-imx.c | 5 +++++ 1 file changed, 5 insertions(+)