linux-kernel - [PATCH 1/2] regulator: pfuze100: allow misprogrammed ID

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Message-Id: <1383715045-15341-1-git-send-email-tharvey@gateworks.com>
Date:	Tue,  5 Nov 2013 21:17:25 -0800
From:	Tim Harvey <tharvey@...eworks.com>
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>
Subject: [PATCH 1/2] 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@...eworks.com>
---
 drivers/regulator/pfuze100-regulator.c |   12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c
index ba67b2c..032df37 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);
-- 
1.7.9.5

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