imx6: add pfuze100 regulator support

- backport driver
- apply patch to allow misprogrammed parts
- enable driver in kernel

Signed-off-by: Tim Harvey <tharvey@gateworks.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38422 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 20 insertions, 0 deletions

diff --git a/target/linux/imx6/patches-3.10/0021-pfuze100-allow-misprogrammed-id.patch b/target/linux/imx6/patches-3.10/0021-pfuze100-allow-misprogrammed-id.patch
new file mode 100644
index 0000000000..a9399a9297
--- /dev/null
+++ b/target/linux/imx6/patches-3.10/0021-pfuze100-allow-misprogrammed-id.patch
@@ -0,0 +1,20 @@
+--- a/drivers/regulator/pfuze100-regulator.c
++++ b/drivers/regulator/pfuze100-regulator.c
+@@ -308,9 +308,14 @@ static int pfuze_identify(struct pfuze_c
+ 	if (ret)
+ 		return ret;
+ 
+-	if (value & 0x0f) {
+-		dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
+-		return -ENODEV;
++	switch (value & 0xf) {
++		case 0x0:
++		/* Freescale misprogrammed 1-3% of parts prior to week 8 of 2013 as ID=8 */
++		case 0x8:
++			break;
++		default:
++			dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
++			return -ENODEV;
+ 	}
+ 
+ 	ret = regmap_read(pfuze_chip->regmap, PFUZE100_REVID, &value);