openwrt/target/linux/brcm2708/patches-4.9/950-0016-spi-bcm2835-Disable-forced-software-CS.patch

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
@@ -706,6 +706,7 @@ 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;
@@ -755,6 +756,7 @@ static int bcm2835_spi_setup(struct spi_
 			spi->chip_select, spi->cs_gpio, err);
 		return err;
 	}
+#endif
 
 	return 0;
 }