brcm2708: update linux 4.4 patches to latest version

As usual these patches were extracted and rebased from the raspberry pi repo:
https://github.com/raspberrypi/linux/tree/rpi-4.4.y

Also adds support for Raspberry Pi Compute Module 3 (untested).

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 46 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.4/0420-spi-bcm2835-Disable-forced-software-CS.patch b/target/linux/brcm2708/patches-4.4/0420-spi-bcm2835-Disable-forced-software-CS.patch
new file mode 100644
index 0000000000..ad922ae6f8
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0420-spi-bcm2835-Disable-forced-software-CS.patch
@@ -0,0 +1,46 @@
+From f3ca1e96b47181a009fd99fbb8e22f9afa5b1972 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>
+---
+ arch/arm/boot/dts/bcm2708_common.dtsi | 2 +-
+ drivers/spi/spi-bcm2835.c             | 2 ++
+ 2 files changed, 3 insertions(+), 1 deletion(-)
+
+--- a/arch/arm/boot/dts/bcm2708_common.dtsi
++++ b/arch/arm/boot/dts/bcm2708_common.dtsi
+@@ -183,7 +183,7 @@
+ 			 * add more gpios if necessary as <&gpio 6 1>
+ 			 * (but do not forget to make them output!)
+ 			 */
+-			cs-gpios = <0>, <0>;
++			cs-gpios = <&gpio 8 1>, <&gpio 7 1>;
+ 		};
+ 
+ 		i2c0: i2c@7e205000 {
+--- 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;
+@@ -761,6 +762,7 @@ static int bcm2835_spi_setup(struct spi_
+ 	 * so we are setting it here explicitly
+ 	 */
+ 	gpio_set_value(spi->cs_gpio, (spi->mode & SPI_CS_HIGH) ? 0 : 1);
++#endif
+ 
+ 	return 0;
+ }