spi: bcm2835: Raise maximum number of slaves to 4

The "RevPi Connect Flat" PLC offered by KUNBUS has 4 slaves attached
to the BCM2835 SPI master.  Raise the maximum number of slaves in the
driver accordingly.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Link: https://lore.kernel.org/r/01453fd062de2d49bd74a847e13a0781cbf8143d.1578572268.git.lukas@wunner.de
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c
index b784c9f..11c2358 100644 (file)
--- a/drivers/spi/spi-bcm2835.c
+++ b/drivers/spi/spi-bcm2835.c
@@ -68,7 +68,7 @@
 #define BCM2835_SPI_FIFO_SIZE          64
 #define BCM2835_SPI_FIFO_SIZE_3_4      48
 #define BCM2835_SPI_DMA_MIN_LENGTH     96
-#define BCM2835_SPI_NUM_CS             3   /* raise as necessary */
+#define BCM2835_SPI_NUM_CS             4   /* raise as necessary */
 #define BCM2835_SPI_MODE_BITS  (SPI_CPOL | SPI_CPHA | SPI_CS_HIGH \
                                | SPI_NO_CS | SPI_3WIRE)