regulator: pfuze100: allow misprogrammed ID

prior to week 08 of 2013 Freescale misprogrammed between 1 and 3% of
PFUZE1000 parts with a ID=0x8 instead of the expected ID=0x0

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Cc: stable@vger.kernel.org

diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c
index 565a631fff70cafa2498f5185f10c9cfba98edb8..8b5e4c712a0190b0643c6ee40a8918582829d4fd 100644 (file)
--- a/drivers/regulator/pfuze100-regulator.c
+++ b/drivers/regulator/pfuze100-regulator.c
@@ -308,9 +308,15 @@ static int pfuze_identify(struct pfuze_chip *pfuze_chip)
        if (ret)
                return ret;
 
-       if (value & 0x0f) {
-               dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
-               return -ENODEV;
+       switch (value & 0x0f) {
+               /* Freescale misprogrammed 1-3% of parts prior to week 8 of 2013 as ID=8 */
+               case 0x8:
+                       dev_info(pfuze_chip->dev, "Assuming misprogrammed ID=0x8");
+               case 0x0:
+                       break;
+               default:
+                       dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
+                       return -ENODEV;
        }
 
        ret = regmap_read(pfuze_chip->regmap, PFUZE100_REVID, &value);