p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

regulator: as3722: Fix equation to calculate max_uV in regulator_lin_range macro 

Fix off-by-one in the equation to calculate max_uV and also adjust the _min_uV
setting accordingly.

For LDOs:
The voltage select bits set the LDO output voltage 0.825V...3.3V, 25mV steps
  ....00h : LDO off
  01h-24h : V_LDO4 = 0.8V + ldo4_vsel * 25mV
                   = 0.825V + (ldo4_vsel - 1h) * 25mV
  25h-3Fh : do not use
  40h-7Fh : V_LDO4 = 1.725V + (ldo4_vsel - 40h) * 25mV

For SD2345:
The voltage select bits set the DC/DC output voltage level and power the DC/DC
converter down.
  ....00h : DC/DC powered down
  01h-40h : V_SD2 = 0.6V + sd2_vsel * 12.5mV
                  = 0.6125V + (sd2_vsel - 1h) * 12.5mV
  41h-70h : V_SD2 = 1.4V + (sd2_vsel - 40h) * 25mV
                  = 1.425V + (sd2_vsel - 41h) * 25mV
  71h-7Fh : V_SD2 = 2.6V + (sd2_vsel - 70h) * 50mV
                  = 2.65V + (sd2_vsel - 71h) * 50mV

Note, the third entry in as3722_sd2345_ranges is wrong in current code.
Fix it based on the datasheet.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Axel Lin 2013-10-02 20:47:56 +08:00 committed by Mark Brown
parent bc407334e9
commit 43f6fc9542
1 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/regulator/as3722-regulator.c
View File

@ -441,11 +441,11 @@ static struct regulator_ops as3722_ldo3_extcntrl_ops = {
.max_sel = _max_sel, \
.uV_step = _step_uV, \
.min_uV = _min_uV, \
.max_uV = _min_uV + (_max_sel - _min_sel + 1) * _step_uV, \
.max_uV = _min_uV + (_max_sel - _min_sel) * _step_uV, \
}
static const struct regulator_linear_range as3722_ldo_ranges[] = {
regulator_lin_range(0x01, 0x24, 800000, 25000),
regulator_lin_range(0x01, 0x24, 825000, 25000),
regulator_lin_range(0x40, 0x7F, 1725000, 25000),
};
@ -605,9 +605,9 @@ static int as3722_sd016_set_current_limit(struct regulator_dev *rdev,
}
static const struct regulator_linear_range as3722_sd2345_ranges[] = {
regulator_lin_range(0x01, 0x40, 600000, 12500),
regulator_lin_range(0x41, 0x70, 1400000, 25000),
regulator_lin_range(0x71, 0x7F, 1725000, 50000),
regulator_lin_range(0x01, 0x40, 612500, 12500),
regulator_lin_range(0x41, 0x70, 1425000, 25000),
regulator_lin_range(0x71, 0x7F, 2650000, 50000),
};
static struct regulator_ops as3722_sd016_ops = {