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

1 files changed, 9 insertions, 3 deletions

diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c
index ba67b2c4e2e7..032df3799efb 100644
--- 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);