[PATCH] spi-rockchip: Fix register out of bounds access
Luis de Arquer
ldearquer at gmail.com
Fri Mar 21 05:57:53 PDT 2025
From: Luis de Arquer <luis.dearquer at inertim.com>
Do not write native chip select stuff for GPIO chip selects.
GPIOs can be numbered much higher than native CS.
Also, it makes no sense.
Signed-off-by: Luis de Arquer <luis.dearquer at inertim.com>
---
drivers/spi/spi-rockchip.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c
index 1bc012fce..1a6381de6 100644
--- a/drivers/spi/spi-rockchip.c
+++ b/drivers/spi/spi-rockchip.c
@@ -547,7 +547,7 @@ static int rockchip_spi_config(struct rockchip_spi *rs,
cr0 |= (spi->mode & 0x3U) << CR0_SCPH_OFFSET;
if (spi->mode & SPI_LSB_FIRST)
cr0 |= CR0_FBM_LSB << CR0_FBM_OFFSET;
- if (spi->mode & SPI_CS_HIGH)
+ if ((spi->mode & SPI_CS_HIGH) && !(spi_get_csgpiod(spi, 0)))
cr0 |= BIT(spi_get_chipselect(spi, 0)) << CR0_SOI_OFFSET;
if (xfer->rx_buf && xfer->tx_buf)
--
2.43.0
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