From 8ce1bb9a5935385e9ef65bda1e8ca923c7fbb887 Mon Sep 17 00:00:00 2001 From: Rasmus Villemoes Date: Tue, 25 Apr 2023 15:45:26 +0200 Subject: 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 Link: https://lore.kernel.org/r/20230425134527.483607-3-linux@rasmusvillemoes.dk Signed-off-by: Mark Brown --- drivers/spi/spi-imx.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/spi/spi-imx.c') 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); -- cgit v1.2.3