From: Phil Elwell <phil@raspberrypi.org>
Date: Fri, 1 Jul 2016 21:09:24 +0000 (+0100)
Subject: spi-bcm2835: Disable forced software CS
X-Git-Tag: archive/raspbian/4.9.82-1+deb9u3+rpi1_jessie~5^2~470
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=88a246c7a00a25567c4b9ea445ee34e8bf97ba24;p=linux-4.9.git

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>
---

diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c
index 5dfe20ffc286..8493474d286f 100644
--- a/drivers/spi/spi-bcm2835.c
+++ b/drivers/spi/spi-bcm2835.c
@@ -707,6 +707,7 @@ static int bcm2835_spi_setup(struct spi_device *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_device *spi)
 			spi->chip_select, spi->cs_gpio, err);
 		return err;
 	}
+#endif
 
 	return 0;
 }