github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-08 06:25:52 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

regulator: tps549b22: read voltage-step from device-tree

Browse Source 
Change-Id: I4de8a54b8475af073ed51ced0959a4e93590563d
Signed-off-by: XiaoDong Huang <derrick.huang@rock-chips.com>
This commit is contained in:
XiaoDong Huang 2019-05-22 14:51:25 +08:00 committed by Tao Huang
parent 9342eb601f
commit 5f48c4e68e
1 changed files with 26 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
drivers/regulator/tps549b22-regulator.c
View File

@ -49,12 +49,12 @@
#define ON_OFF_CFG_OPT_MSK 0x0c
#define VOL_MIN_IDX 0x133
#define VOL_MAX_IDX 0x266
#define VOL_STEP 2500
#define VOL_STEP_DEF 2500
#define VOL2REG(vol_sel) \
(((vol_sel) / VOL_STEP) & VOL_MSK)
#define REG2VOL(val) \
(VOL_STEP * ((val) & VOL_MSK))
#define VOL2REG(vol_sel, vol_step) \
((vol_sel) / (vol_step) & VOL_MSK)
#define REG2VOL(val, vol_step) \
((vol_step) * ((val) & VOL_MSK))
#define TPS549b22_NUM_REGULATORS 1
@ -65,6 +65,7 @@ struct tps549b22 {
struct regulator_dev **rdev;
struct regmap *regmap_8bits;
struct regmap *regmap_16bits;
int vol_step;
};
struct tps549b22_board {
@ -82,10 +83,12 @@ struct tps549b22_regulator_subdev {
static int tps549b22_dcdc_list_voltage(struct regulator_dev *rdev,
unsigned int index)
{
struct tps549b22 *tps549b22 = rdev_get_drvdata(rdev);
if (index + VOL_MIN_IDX > VOL_MAX_IDX)
return -EINVAL;
return REG2VOL(index + VOL_MIN_IDX);
return REG2VOL(index + VOL_MIN_IDX, tps549b22->vol_step);
}
static int tps549b22_reg_init(struct tps549b22 *tps549b22)
@ -147,7 +150,7 @@ static int tps549b22dcdc_get_voltage(struct regulator_dev *rdev)
TPS549b22_REG_COMMAND,
&val);
if (!err)
return REG2VOL(val);
return REG2VOL(val, tps549b22->vol_step);
return -1;
}
@ -158,25 +161,25 @@ static int tps549b22dcdc_set_voltage(struct regulator_dev *rdev,
unsigned int *selector)
{
struct tps549b22 *tps549b22 = rdev_get_drvdata(rdev);
u32 val;
int val;
int err;
if (min_uV < REG2VOL(VOL_MIN_IDX) ||
min_uV > REG2VOL(VOL_MAX_IDX)) {
if (min_uV < REG2VOL(VOL_MIN_IDX, tps549b22->vol_step) ||
min_uV > REG2VOL(VOL_MAX_IDX, tps549b22->vol_step)) {
dev_warn(rdev_get_dev(rdev),
"this voltage is out of limit! voltage set is %d mv\n",
REG2VOL(min_uV));
REG2VOL(min_uV, tps549b22->vol_step));
return -EINVAL;
}
for (val = VOL_MIN_IDX; val <= VOL_MAX_IDX; val++)
if (REG2VOL(val) >= min_uV)
if (REG2VOL(val, tps549b22->vol_step) >= min_uV)
break;
if (REG2VOL(val) > max_uV)
if (REG2VOL(val, tps549b22->vol_step) > max_uV)
dev_warn(rdev_get_dev(rdev),
"this voltage is not support! voltage set is %d mv\n",
REG2VOL(val));
REG2VOL(val, tps549b22->vol_step));
err = regmap_update_bits(tps549b22->regmap_16bits,
TPS549b22_REG_COMMAND,
@ -185,7 +188,7 @@ static int tps549b22dcdc_set_voltage(struct regulator_dev *rdev,
if (err)
dev_err(rdev_get_dev(rdev),
"set voltage is error! voltage set is %d mv\n",
REG2VOL(val));
REG2VOL(val, tps549b22->vol_step));
return err;
}
@ -236,6 +239,14 @@ tps549b22_parse_dt(struct tps549b22 *tps549b22)
regs,
tps549b22_reg_matches,
TPS549b22_NUM_REGULATORS);
if (of_property_read_u32(tps549b22_reg_matches[0].of_node,
"voltage-step",
&tps549b22->vol_step))
tps549b22->vol_step = VOL_STEP_DEF;
dev_info(tps549b22->dev, "voltage-step: %duV\n", tps549b22->vol_step);
of_node_put(regs);
of_node_put(tps549b22_np);