diff options
| author | Jonas Gorski <jogo@openwrt.org> | 2014-01-13 12:11:58 +0000 |
|---|---|---|
| committer | Jonas Gorski <jogo@openwrt.org> | 2014-01-13 12:11:58 +0000 |
| commit | af7e570c3b63d414533aaf179ef0cbc5b620ec6f (patch) | |
| tree | eb2b95743987920923e5c673a875476ab1b79937 /target/linux/brcm63xx/patches-3.10/055-spi-bcm63xx-don-t-reject-reads-256-bytes.patch | |
| parent | f08f0cafc24619242853e3fe11e2e5876c498551 (diff) | |
| download | upstream-af7e570c3b63d414533aaf179ef0cbc5b620ec6f.tar.gz upstream-af7e570c3b63d414533aaf179ef0cbc5b620ec6f.tar.bz2 upstream-af7e570c3b63d414533aaf179ef0cbc5b620ec6f.zip | |
brcm63xx: fix legacy spi tranfers >= 256 bytes
Fixes e.g. SPI flash access on BCM6358/BCM6368. Transfers < 256 bytes
are not affected.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
SVN-Revision: 39265
Diffstat (limited to 'target/linux/brcm63xx/patches-3.10/055-spi-bcm63xx-don-t-reject-reads-256-bytes.patch')
| -rw-r--r-- | target/linux/brcm63xx/patches-3.10/055-spi-bcm63xx-don-t-reject-reads-256-bytes.patch | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/patches-3.10/055-spi-bcm63xx-don-t-reject-reads-256-bytes.patch b/target/linux/brcm63xx/patches-3.10/055-spi-bcm63xx-don-t-reject-reads-256-bytes.patch new file mode 100644 index 0000000000..cf83c7b7b7 --- /dev/null +++ b/target/linux/brcm63xx/patches-3.10/055-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 +@@ -214,13 +214,7 @@ 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; |