brcm2708: update against latest rpi-3.10.y branch

Update our copies of the brcm2708 patches to the latest rpi-3.10-y
rebased against linux-3.10.y stable (3.10.32). This should hopefully
make it easier for us in the future to leverage the raspberry/rpi-*
branches.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39770 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 67 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-3.10/0056-spi-bcm2708-add-9-bit-support-using-LoSSI-mode.patch b/target/linux/brcm2708/patches-3.10/0056-spi-bcm2708-add-9-bit-support-using-LoSSI-mode.patch
new file mode 100644
index 0000000000..d7ad5a293c
--- /dev/null
+++ b/target/linux/brcm2708/patches-3.10/0056-spi-bcm2708-add-9-bit-support-using-LoSSI-mode.patch
@@ -0,0 +1,67 @@
+From 75c9b03f90ca974cb072d96f423884b773ca5425 Mon Sep 17 00:00:00 2001
+From: notro <notro@tronnes.org>
+Date: Sat, 26 Jan 2013 20:38:03 +0100
+Subject: [PATCH 056/174] spi-bcm2708: add 9-bit support using LoSSI mode
+
+---
+ drivers/spi/spi-bcm2708.c | 30 ++++++++++++++++++++++++++++--
+ 1 file changed, 28 insertions(+), 2 deletions(-)
+
+--- a/drivers/spi/spi-bcm2708.c
++++ b/drivers/spi/spi-bcm2708.c
+@@ -146,10 +146,31 @@ static inline void bcm2708_rd_fifo(struc
+ static inline void bcm2708_wr_fifo(struct bcm2708_spi *bs, int len)
+ {
+ 	u8 byte;
++	u16 val;
+ 
+ 	if (len > bs->len)
+ 		len = bs->len;
+ 
++	if (unlikely(bcm2708_rd(bs, SPI_CS) & SPI_CS_LEN)) {
++		/* LoSSI mode */
++		if (unlikely(len % 2)) {
++			printk(KERN_ERR"bcm2708_wr_fifo: length must be even, skipping.\n");
++			bs->len = 0;
++			return;
++		}
++		while (len) {
++			if (bs->tx_buf) {
++				val = *(const u16 *)bs->tx_buf;
++				bs->tx_buf += 2;
++			} else
++				val = 0;
++			bcm2708_wr(bs, SPI_FIFO, val);
++			bs->len -= 2;
++			len -= 2;
++		}
++		return;
++	}
++
+ 	while (len--) {
+ 		byte = bs->tx_buf ? *bs->tx_buf++ : 0;
+ 		bcm2708_wr(bs, SPI_FIFO, byte);
+@@ -234,8 +255,12 @@ static int bcm2708_setup_state(struct sp
+ 	switch (bpw) {
+ 	case 8:
+ 		break;
++	case 9:
++		/* Reading in LoSSI mode is a special case. See 'BCM2835 ARM Peripherals' datasheet */
++		cs |= SPI_CS_LEN;
++		break;
+ 	default:
+-		dev_dbg(dev, "setup: invalid bits_per_word %u (must be 8)\n",
++		dev_dbg(dev, "setup: invalid bits_per_word %u (must be 8 or 9)\n",
+ 			bpw);
+ 		return -EINVAL;
+ 	}
+@@ -283,7 +308,8 @@ static int bcm2708_process_transfer(stru
+ 		ret = bcm2708_setup_state(spi->master, &spi->dev, &state,
+ 			xfer->speed_hz ? xfer->speed_hz : spi->max_speed_hz,
+ 			spi->chip_select, spi->mode,
+-			spi->bits_per_word);
++			xfer->bits_per_word ? xfer->bits_per_word :
++				spi->bits_per_word);
+ 		if (ret)
+ 			return ret;
+