diff options
| author | Axel Lin <axel.lin@ingics.com> | 2012-11-27 03:24:33 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-11-27 21:07:40 +0100 |
| commit | 33234e791de2ac3ea915158e042907748191cabd (patch) | |
| tree | d1e0da62abf0a744526457e434b23456e8ea4be5 /drivers | |
| parent | Linux 3.7-rc7 (diff) | |
| download | linux-33234e791de2ac3ea915158e042907748191cabd.tar.xz linux-33234e791de2ac3ea915158e042907748191cabd.zip | |
regulator: core: Allow specific minimal selector for starting linear mapping
Some drivers (at least 3 drivers) have such variant of linear mapping that
the first few selectors are invalid and the reset are linear mapping.
Let's support this case in core.
This patch adds linear_min_sel in struct regulator_desc,
so we can allow specific minimal selector for starting linear mapping.
Then extends regulator_[map|list]_voltage_linear() to support this feature.
Note that for selectors less than min_linear_index, we need count them to
n_voltages so regulator_list_voltage() won't fail while checking the boundary
for selector before calling list_voltage callback.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/regulator/core.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index e872c8be080e..02a249b024b3 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1897,6 +1897,10 @@ int regulator_list_voltage_linear(struct regulator_dev *rdev, { if (selector >= rdev->desc->n_voltages) return -EINVAL; + if (selector < rdev->desc->linear_min_sel) + return 0; + + selector -= rdev->desc->linear_min_sel; return rdev->desc->min_uV + (rdev->desc->uV_step * selector); } @@ -2120,6 +2124,8 @@ int regulator_map_voltage_linear(struct regulator_dev *rdev, if (ret < 0) return ret; + ret += rdev->desc->linear_min_sel; + /* Map back into a voltage to verify we're still in bounds */ voltage = rdev->desc->ops->list_voltage(rdev, ret); if (voltage < min_uV || voltage > max_uV) |