From c0aaf0d4213bfc9df85c397cd974f7a6f15255f2 Mon Sep 17 00:00:00 2001 From: Phil Elwell <phil@raspberrypi.org> Date: Fri, 1 Jul 2016 22:09:24 +0100 Subject: [PATCH] spi-bcm2835: Disable forced software CS Select software CS in bcm2708_common.dtsi, and disable the automatic conversion in the driver to allow hardware CS to be re-enabled with an overlay. See: https://github.com/raspberrypi/linux/issues/1547 Signed-off-by: Phil Elwell <phil@raspberrypi.org> --- drivers/spi/spi-bcm2835.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/spi/spi-bcm2835.c +++ b/drivers/spi/spi-bcm2835.c @@ -707,6 +707,7 @@ static int bcm2835_spi_setup(struct spi_ return -EINVAL; } +#if 0 /* now translate native cs to GPIO */ /* first look for chip select pins in the devices pin groups */ for (pingroup_index = 0; @@ -756,6 +757,7 @@ static int bcm2835_spi_setup(struct spi_ spi->chip_select, spi->cs_gpio, err); return err; } +#endif return 0; }