brcm63xx: add preliminary support for 3.13

[openwrt/svn-archive/archive.git] / target / linux / brcm63xx / patches-3.13 / 006-spi-bcm63xx-don-t-reject-reads-256-bytes.patch

diff --git a/target/linux/brcm63xx/patches-3.13/006-spi-bcm63xx-don-t-reject-reads-256-bytes.patch b/target/linux/brcm63xx/patches-3.13/006-spi-bcm63xx-don-t-reject-reads-256-bytes.patch
new file mode 100644 (file)
index 0000000..60abbda
--- /dev/null
+++ b/target/linux/brcm63xx/patches-3.13/006-spi-bcm63xx-don-t-reject-reads-256-bytes.patch
@@ -0,0 +1,31 @@
+From 4d8fa9d3d1fe1d70fe7d59537acf49797f6010a1 Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jogo@openwrt.org>
+Date: Sun, 1 Dec 2013 16:19:46 +0100
+Subject: [PATCH 2/2] spi/bcm63xx: don't reject reads >= 256 bytes
+
+The rx_tail register is only 8 bit wide, so it will wrap around
+after 256 read bytes. This makes it rather meaningless, so drop any
+usage of it to not treat reads over 256 as failed.
+
+Signed-off-by: Jonas Gorski <jogo@openwrt.org>
+---
+ drivers/spi/spi-bcm63xx.c | 8 +-------
+ 1 file changed, 1 insertion(+), 7 deletions(-)
+
+--- a/drivers/spi/spi-bcm63xx.c
++++ b/drivers/spi/spi-bcm63xx.c
+@@ -205,13 +205,7 @@ static int bcm63xx_txrx_bufs(struct spi_
+       if (!timeout)
+               return -ETIMEDOUT;
+ 
+-      /* read out all data */
+-      rx_tail = bcm_spi_readb(bs, SPI_RX_TAIL);
+-
+-      if (do_rx && rx_tail != len)
+-              return -EIO;
+-
+-      if (!rx_tail)
++      if (!do_rx)
+               return 0;
+ 
+       len = 0;