OrgACRN
/
acrn-kernel
mirror of https://github.com/projectacrn/acrn-kernel.git
1
0
Fork 0
Code Issues Releases Wiki Activity

regulator: pf8x00: Add suspend support 

This patch adds suspend/resume support so that it is possible to
configure the LDOs and BUCKs as on or off during suspend phase as
well as to configure suspend specific voltages.

Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
Link: https://lore.kernel.org/r/4c2e79d4fa96befdc9a6c59c3ff27b0a34f9fb56.camel@googlemail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Christoph Fritz 2021-01-17 21:49:17 +01:00 committed by Mark Brown
parent 24be0c7156
commit 7fefe72b0f
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 70 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

75
drivers/regulator/pf8x00-regulator.c
View File

@ -125,8 +125,12 @@ enum pf8x00_devid {
#define PF8X00_DEVICE_FAM_MASK GENMASK(7, 4)
#define PF8X00_DEVICE_ID_MASK GENMASK(3, 0)
struct pf8x00_regulator {
struct pf8x00_regulator_data {
struct regulator_desc desc;
unsigned int suspend_enable_reg;
unsigned int suspend_enable_mask;
unsigned int suspend_voltage_reg;
unsigned int suspend_voltage_cache;
};
struct pf8x00_chip {
@ -276,6 +280,53 @@ static int pf8x00_of_parse_cb(struct device_node *np,
return 0;
}
static int pf8x00_suspend_enable(struct regulator_dev *rdev)
{
struct pf8x00_regulator_data *regl = rdev_get_drvdata(rdev);
struct regmap *rmap = rdev_get_regmap(rdev);
return regmap_update_bits(rmap, regl->suspend_enable_reg,
regl->suspend_enable_mask,
regl->suspend_enable_mask);
}
static int pf8x00_suspend_disable(struct regulator_dev *rdev)
{
struct pf8x00_regulator_data *regl = rdev_get_drvdata(rdev);
struct regmap *rmap = rdev_get_regmap(rdev);
return regmap_update_bits(rmap, regl->suspend_enable_reg,
regl->suspend_enable_mask, 0);
}
static int pf8x00_set_suspend_voltage(struct regulator_dev *rdev, int uV)
{
struct pf8x00_regulator_data *regl = rdev_get_drvdata(rdev);
int ret;
if (regl->suspend_voltage_cache == uV)
return 0;
ret = regulator_map_voltage_iterate(rdev, uV, uV);
if (ret < 0) {
dev_err(rdev_get_dev(rdev), "failed to map %i uV\n", uV);
return ret;
}
dev_dbg(rdev_get_dev(rdev), "uV: %i, reg: 0x%x, msk: 0x%x, val: 0x%x\n",
uV, regl->suspend_voltage_reg, regl->desc.vsel_mask, ret);
ret = regmap_update_bits(rdev->regmap, regl->suspend_voltage_reg,
regl->desc.vsel_mask, ret);
if (ret < 0) {
dev_err(rdev_get_dev(rdev), "failed to set %i uV\n", uV);
return ret;
}
regl->suspend_voltage_cache = uV;
return 0;
}
static const struct regulator_ops pf8x00_ldo_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
@ -283,6 +334,9 @@ static const struct regulator_ops pf8x00_ldo_ops = {
.list_voltage = regulator_list_voltage_table,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_suspend_enable = pf8x00_suspend_enable,
.set_suspend_disable = pf8x00_suspend_disable,
.set_suspend_voltage = pf8x00_set_suspend_voltage,
};
@ -295,6 +349,9 @@ static const struct regulator_ops pf8x00_buck1_6_ops = {
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.get_current_limit = regulator_get_current_limit_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
.set_suspend_enable = pf8x00_suspend_enable,
.set_suspend_disable = pf8x00_suspend_disable,
.set_suspend_voltage = pf8x00_set_suspend_voltage,
};
static const struct regulator_ops pf8x00_buck7_ops = {
@ -306,6 +363,8 @@ static const struct regulator_ops pf8x00_buck7_ops = {
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.get_current_limit = regulator_get_current_limit_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
.set_suspend_enable = pf8x00_suspend_enable,
.set_suspend_disable = pf8x00_suspend_disable,
};
static const struct regulator_ops pf8x00_vsnvs_ops = {
@ -337,6 +396,9 @@ static const struct regulator_ops pf8x00_vsnvs_ops = {
.disable_val = 0x0, \
.enable_mask = 2, \
}, \
.suspend_enable_reg = (base) + LDO_CONFIG2, \
.suspend_enable_mask = 1, \
.suspend_voltage_reg = (base) + LDO_STBY_VOLT, \
}
#define PF8X00BUCK(_id, _name, base, voltages) \
@ -367,6 +429,9 @@ static const struct regulator_ops pf8x00_vsnvs_ops = {
.enable_mask = 0x3, \
.enable_time = 500, \
}, \
.suspend_enable_reg = (base) + SW_MODE1, \
.suspend_enable_mask = 0xc, \
.suspend_voltage_reg = (base) + SW_STBY_VOLT, \
}
#define PF8X00BUCK7(_name, base, voltages) \
@ -415,7 +480,7 @@ static const struct regulator_ops pf8x00_vsnvs_ops = {
}, \
}
static struct pf8x00_regulator pf8x00_regulators_data[PF8X00_MAX_REGULATORS] = {
static struct pf8x00_regulator_data pf8x00_regs_data[PF8X00_MAX_REGULATORS] = {
PF8X00LDO(1, "ldo1", PF8X00_LDO_BASE(PF8X00_LDO1), pf8x00_ldo_voltages),
PF8X00LDO(2, "ldo2", PF8X00_LDO_BASE(PF8X00_LDO2), pf8x00_ldo_voltages),
PF8X00LDO(3, "ldo3", PF8X00_LDO_BASE(PF8X00_LDO3), pf8x00_ldo_voltages),
@ -500,12 +565,12 @@ static int pf8x00_i2c_probe(struct i2c_client *client)
if (ret)
return ret;
for (id = 0; id < ARRAY_SIZE(pf8x00_regulators_data); id++) {
struct pf8x00_regulator *data = &pf8x00_regulators_data[id];
for (id = 0; id < ARRAY_SIZE(pf8x00_regs_data); id++) {
struct pf8x00_regulator_data *data = &pf8x00_regs_data[id];
struct regulator_dev *rdev;
config.dev = chip->dev;
config.driver_data = chip;
config.driver_data = data;
config.regmap = chip->regmap;
rdev = devm_regulator_register(&client->dev, &data->desc, &config);