4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Charles Keepax <ckee...@opensource.wolfsonmicro.com>
commit 85b037442e3f0e84296ab1010fd6b057eee18496 upstream.
The handling of bypass_val_on that was added in
regulator_get_bypass_regmap is done unconditionally however
several drivers don't define a value for bypass_val_on. This
results in those drivers reporting bypass being enabled when
it is not. In regulator_set_bypass_regmap we use bypass_mask
if bypass_val_on is zero. This patch adds similar handling in
regulator_get_bypass_regmap.
Fixes: commit dd1a571daee7 ("regulator: helpers: Ensure bypass register field
matches ON value")
Signed-off-by: Charles Keepax <ckee...@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broo...@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/regulator/helpers.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/regulator/helpers.c
+++ b/drivers/regulator/helpers.c
@@ -454,13 +454,17 @@ EXPORT_SYMBOL_GPL(regulator_set_bypass_r
int regulator_get_bypass_regmap(struct regulator_dev *rdev, bool *enable)
{
unsigned int val;
+ unsigned int val_on = rdev->desc->bypass_val_on;
int ret;
ret = regmap_read(rdev->regmap, rdev->desc->bypass_reg, &val);
if (ret != 0)
return ret;
- *enable = (val & rdev->desc->bypass_mask) == rdev->desc->bypass_val_on;
+ if (!val_on)
+ val_on = rdev->desc->bypass_mask;
+
+ *enable = (val & rdev->desc->bypass_mask) == val_on;
return 0;
}
