From: Rasmus Villemoes Date: Tue, 25 Apr 2023 13:45:26 +0000 (+0200) Subject: spi: spi-imx: set max_native_cs for imx51/imx53/imx6 variants X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=8ce1bb9a5935385e9ef65bda1e8ca923c7fbb887;p=linux.git 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 --- diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index bed24f1cbd7b5..bd6ddb142b133 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);