mfd: ab8500-gpadc: Reread on failure
Reread the gpadc once upon failure.
Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Mattias WALLIN <mattias.wallin@stericsson.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/ab8500-gpadc.c b/drivers/mfd/ab8500-gpadc.c
index 9ed3afc..7f39479 100644
--- a/drivers/mfd/ab8500-gpadc.c
+++ b/drivers/mfd/ab8500-gpadc.c
@@ -256,6 +256,11 @@
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;
