brcm2708: add linux 4.9 support

Patches from Raspberry Pi repo:
https://github.com/raspberrypi/linux/commits/rpi-4.9.y

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

1 files changed, 32 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.9/0109-i2c-bcm2835-Use-dev_dbg-logging-on-transfer-errors.patch b/target/linux/brcm2708/patches-4.9/0109-i2c-bcm2835-Use-dev_dbg-logging-on-transfer-errors.patch
new file mode 100644
index 0000000000..b8cbe10452
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.9/0109-i2c-bcm2835-Use-dev_dbg-logging-on-transfer-errors.patch
@@ -0,0 +1,32 @@
+From 3e9e15ec9e56874764fdaa43b2af8008469b87b2 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
+Date: Mon, 19 Sep 2016 17:19:41 +0200
+Subject: [PATCH] i2c: bcm2835: Use dev_dbg logging on transfer errors
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Writing to an AT24C32 generates on average 2x i2c transfer errors per
+32-byte page write. Which amounts to a lot for a 4k write. This is due
+to the fact that the chip doesn't respond during it's internal write
+cycle when the at24 driver tries and retries the next write.
+Only a handful drivers use dev_err() on transfer error, so switch to
+dev_dbg() instead.
+
+Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
+Reviewed-by: Eric Anholt <eric@anholt.net>
+---
+ drivers/i2c/busses/i2c-bcm2835.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/i2c/busses/i2c-bcm2835.c
++++ b/drivers/i2c/busses/i2c-bcm2835.c
+@@ -216,7 +216,7 @@ static int bcm2835_i2c_xfer_msg(struct b
+ 	    (msg->flags & I2C_M_IGNORE_NAK))
+ 		return 0;
+ 
+-	dev_err(i2c_dev->dev, "i2c transfer failed: %x\n", i2c_dev->msg_err);
++	dev_dbg(i2c_dev->dev, "i2c transfer failed: %x\n", i2c_dev->msg_err);
+ 
+ 	if (i2c_dev->msg_err & BCM2835_I2C_S_ERR)
+ 		return -EREMOTEIO;