kernel: bump 4.9 to 4.9.150
[openwrt/openwrt.git] / target / linux / brcm2708 / patches-4.9 / 950-0016-spi-bcm2835-Disable-forced-software-CS.patch
1 From c0aaf0d4213bfc9df85c397cd974f7a6f15255f2 Mon Sep 17 00:00:00 2001
2 From: Phil Elwell <phil@raspberrypi.org>
3 Date: Fri, 1 Jul 2016 22:09:24 +0100
4 Subject: [PATCH] spi-bcm2835: Disable forced software CS
5
6 Select software CS in bcm2708_common.dtsi, and disable the automatic
7 conversion in the driver to allow hardware CS to be re-enabled with an
8 overlay.
9
10 See: https://github.com/raspberrypi/linux/issues/1547
11
12 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
13 ---
14 drivers/spi/spi-bcm2835.c | 2 ++
15 1 file changed, 2 insertions(+)
16
17 --- a/drivers/spi/spi-bcm2835.c
18 +++ b/drivers/spi/spi-bcm2835.c
19 @@ -705,6 +705,7 @@ static int bcm2835_spi_setup(struct spi_
20 return -EINVAL;
21 }
22
23 +#if 0
24 /* now translate native cs to GPIO */
25 /* first look for chip select pins in the devices pin groups */
26 for (pingroup_index = 0;
27 @@ -754,6 +755,7 @@ static int bcm2835_spi_setup(struct spi_
28 spi->chip_select, spi->cs_gpio, err);
29 return err;
30 }
31 +#endif
32
33 return 0;
34 }