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authorMark Brown <broonie@opensource.wolfsonmicro.com>2010-11-10 17:38:29 +0300
committerLiam Girdwood <lrg@slimlogic.co.uk>2011-01-12 17:32:59 +0300
commit3a93f2a9f4d8f73d74c0e552feb68a10f778a219 (patch)
tree8a9f503f2f061ad3fe9712b0986b0da346f4c8d2 /drivers/regulator/max1586.c
parent63cee946148821bca42be10130b061c2d0f5af7e (diff)
downloadlinux-3a93f2a9f4d8f73d74c0e552feb68a10f778a219.tar.xz
regulator: Report actual configured voltage to set_voltage()
Change the interface used by set_voltage() to report the selected value to the regulator core in terms of a selector used by list_voltage(). This allows the regulator core to know the voltage that was chosen without having to do an explict get_voltage(), which would be much more expensive as it will generally access hardware. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'drivers/regulator/max1586.c')
-rw-r--r--drivers/regulator/max1586.c30
1 files changed, 15 insertions, 15 deletions
diff --git a/drivers/regulator/max1586.c b/drivers/regulator/max1586.c
index 559cfa271a44..3f49512c5134 100644
--- a/drivers/regulator/max1586.c
+++ b/drivers/regulator/max1586.c
@@ -63,12 +63,12 @@ static int max1586_v3_calc_voltage(struct max1586_data *max1586,
return max1586->min_uV + (selector * range_uV / MAX1586_V3_MAX_VSEL);
}
-static int max1586_v3_set(struct regulator_dev *rdev, int min_uV, int max_uV)
+static int max1586_v3_set(struct regulator_dev *rdev, int min_uV, int max_uV,
+ unsigned *selector)
{
struct max1586_data *max1586 = rdev_get_drvdata(rdev);
struct i2c_client *client = max1586->client;
unsigned range_uV = max1586->max_uV - max1586->min_uV;
- unsigned selector;
u8 v3_prog;
if (min_uV > max1586->max_uV || max_uV < max1586->min_uV)
@@ -76,15 +76,15 @@ static int max1586_v3_set(struct regulator_dev *rdev, int min_uV, int max_uV)
if (min_uV < max1586->min_uV)
min_uV = max1586->min_uV;
- selector = ((min_uV - max1586->min_uV) * MAX1586_V3_MAX_VSEL +
+ *selector = ((min_uV - max1586->min_uV) * MAX1586_V3_MAX_VSEL +
range_uV - 1) / range_uV;
- if (max1586_v3_calc_voltage(max1586, selector) > max_uV)
+ if (max1586_v3_calc_voltage(max1586, *selector) > max_uV)
return -EINVAL;
dev_dbg(&client->dev, "changing voltage v3 to %dmv\n",
- max1586_v3_calc_voltage(max1586, selector) / 1000);
+ max1586_v3_calc_voltage(max1586, *selector) / 1000);
- v3_prog = I2C_V3_SELECT | (u8) selector;
+ v3_prog = I2C_V3_SELECT | (u8) *selector;
return i2c_smbus_write_byte(client, v3_prog);
}
@@ -110,10 +110,10 @@ static int max1586_v6_calc_voltage(unsigned selector)
return voltages_uv[selector];
}
-static int max1586_v6_set(struct regulator_dev *rdev, int min_uV, int max_uV)
+static int max1586_v6_set(struct regulator_dev *rdev, int min_uV, int max_uV,
+ unsigned int *selector)
{
struct i2c_client *client = rdev_get_drvdata(rdev);
- unsigned selector;
u8 v6_prog;
if (min_uV < MAX1586_V6_MIN_UV || min_uV > MAX1586_V6_MAX_UV)
@@ -122,21 +122,21 @@ static int max1586_v6_set(struct regulator_dev *rdev, int min_uV, int max_uV)
return -EINVAL;
if (min_uV < 1800000)
- selector = 0;
+ *selector = 0;
else if (min_uV < 2500000)
- selector = 1;
+ *selector = 1;
else if (min_uV < 3000000)
- selector = 2;
+ *selector = 2;
else if (min_uV >= 3000000)
- selector = 3;
+ *selector = 3;
- if (max1586_v6_calc_voltage(selector) > max_uV)
+ if (max1586_v6_calc_voltage(*selector) > max_uV)
return -EINVAL;
dev_dbg(&client->dev, "changing voltage v6 to %dmv\n",
- max1586_v6_calc_voltage(selector) / 1000);
+ max1586_v6_calc_voltage(*selector) / 1000);
- v6_prog = I2C_V6_SELECT | (u8) selector;
+ v6_prog = I2C_V6_SELECT | (u8) *selector;
return i2c_smbus_write_byte(client, v6_prog);
}