From: Jonas Aaberg <jonas.ab...@stericsson.com>
Reread the gpadc once upon failure.
Signed-off-by: Jonas Aaberg <jonas.ab...@stericsson.com>
Signed-off-by: Lee Jones <lee.jo...@linaro.org>
Reviewed-by: Mattias WALLIN <mattias.wal...@stericsson.com>
---
drivers/mfd/ab8500-gpadc.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/mfd/ab8500-gpadc.c b/drivers/mfd/ab8500-gpadc.c
index 34c1d04..1b48ac1 100644
--- a/drivers/mfd/ab8500-gpadc.c
+++ b/drivers/mfd/ab8500-gpadc.c
@@ -259,6 +259,11 @@ int ab8500_gpadc_convert(struct ab8500_gpadc *gpadc, u8
channel)
int voltage;
ad_value = ab8500_gpadc_read_raw(gpadc, channel);
+
+ /* On failure retry a second time */
+ if (ad_value < 0)
+ ad_value = ab8500_gpadc_read_raw(gpadc, channel);
+
if (ad_value < 0) {
dev_err(gpadc->dev, "GPADC raw value failed ch: %d\n", channel);
return ad_value;
--
1.7.10.4
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