From: Philip Balister <philip@balister.org>
Date: Tue, 2 Jan 2007 22:01:21 +0000 (+0000)
Subject: linux-omap1-2.6.19-omap1 : Add patch to fix kernel oops starting ALSA.
X-Git-Tag: Release-2010-05/1~9453^2~32^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0f8fb7dd8a24cf4d058408f02a645fc38c7cb229;p=openembedded.git

linux-omap1-2.6.19-omap1 : Add patch to fix kernel oops starting ALSA.
---

diff --git a/packages/linux/linux-omap1-2.6.19-omap1/i2c-fix.patch b/packages/linux/linux-omap1-2.6.19-omap1/i2c-fix.patch
new file mode 100644
index 0000000000..3b35ce23a2
--- /dev/null
+++ b/packages/linux/linux-omap1-2.6.19-omap1/i2c-fix.patch
@@ -0,0 +1,56 @@
+Hack to add I2C zero length transfers and SMBus quick mode
+necessary for AIC23 sound again.
+
+Signed-off-by: Dirk Behme <dirk.behme_at_gmail.com>
+
+
+-------------- next part --------------
+Index: linux-osk/drivers/i2c/busses/i2c-omap.c
+===================================================================
+--- linux-osk.orig/drivers/i2c/busses/i2c-omap.c
++++ linux-osk/drivers/i2c/busses/i2c-omap.c
+@@ -285,20 +285,29 @@ static int omap_i2c_xfer_msg(struct i2c_
+ 			     struct i2c_msg *msg, int stop)
+ {
+ 	struct omap_i2c_dev *dev = i2c_get_adapdata(adap);
++	u8 zero_byte = 0;
+ 	int r;
+ 	u16 w;
+ 
+ 	dev_dbg(dev->dev, "addr: 0x%04x, len: %d, flags: 0x%x, stop: %d\n",
+ 		msg->addr, msg->len, msg->flags, stop);
+ 
+-	if (msg->len == 0)
+-		return -EINVAL;
+-
+ 	omap_i2c_write_reg(dev, OMAP_I2C_SA_REG, msg->addr);
+ 
+-	/* REVISIT: Could the STB bit of I2C_CON be used with probing? */
+-	dev->buf = msg->buf;
+-	dev->buf_len = msg->len;
++	/* Sigh, seems we can't do zero length transactions. Thus, we
++	 * can't probe for devices w/o actually sending/receiving at least
++	 * a single byte. So we'll set count to 1 for the zero length
++	 * transaction case and hope we don't cause grief for some
++	 * arbitrary device due to random byte write/read during
++	 * probes.
++	 */
++	if (msg->len == 0) {
++		dev->buf = &zero_byte;
++		dev->buf_len = 1;
++	} else {
++		dev->buf = msg->buf;
++		dev->buf_len = msg->len;
++	}
+ 
+ 	omap_i2c_write_reg(dev, OMAP_I2C_CNT_REG, dev->buf_len);
+ 
+@@ -383,7 +392,7 @@ out:
+ static u32
+ omap_i2c_func(struct i2c_adapter *adap)
+ {
+-	return I2C_FUNC_I2C | (I2C_FUNC_SMBUS_EMUL & ~I2C_FUNC_SMBUS_QUICK);
++	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+ }
+ 
+ static inline void
diff --git a/packages/linux/linux-omap1_2.6.19-omap1.bb b/packages/linux/linux-omap1_2.6.19-omap1.bb
index ca43d567c0..cfe0723770 100644
--- a/packages/linux/linux-omap1_2.6.19-omap1.bb
+++ b/packages/linux/linux-omap1_2.6.19-omap1.bb
@@ -1,10 +1,9 @@
 require linux-omap1.inc
 
-DEFAULT_PREFERENCE = "-1"
-
 SRC_URI = "${KERNELORG_MIRROR}/pub/linux/kernel/v2.6/linux-2.6.19.tar.bz2 \
            http://www.muru.com/linux/omap/patches/patch-2.6.19-omap1.bz2;patch=1 \
            file://another-ide-cs-ids.patch;patch=1 \
+           file://i2c-fix.patch;patch=1 \
 	   file://defconfig \
 	   file://defconfig.eabi"