leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

regulator: mp886x: support setting switch freq

Browse Source 
Both MP8867 and MP8869 support different switch frequency.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/20200729131023.77cc1dd2@xhacker
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jisheng Zhang
2020-07-29 13:10:23 +08:00
committed by Mark Brown
parent 0eddcf0267
commit ee6ad5a245
1 changed files with 42 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
drivers/regulator/mp886x.c
View File

@@ -22,10 +22,14 @@
#define MP886X_SLEW_MASK (0x7 << MP886X_SLEW_SHIFT) #define MP886X_SLEW_MASK (0x7 << MP886X_SLEW_SHIFT)
#define MP886X_GO (1 << 6) #define MP886X_GO (1 << 6)
#define MP886X_EN (1 << 7) #define MP886X_EN (1 << 7)
#define MP8869_SYSCNTLREG2 0x02
struct mp886x_cfg_info { struct mp886x_cfg_info {
const struct regulator_ops *rops; const struct regulator_ops *rops;
const int slew_rates[8]; const int slew_rates[8];
const int switch_freq[4];
const u8 fs_reg;
const u8 fs_shift;
}; };
struct mp886x_device_info { struct mp886x_device_info {
@@ -60,6 +64,24 @@ static int mp886x_set_ramp(struct regulator_dev *rdev, int ramp)
MP886X_SLEW_MASK, reg << MP886X_SLEW_SHIFT); MP886X_SLEW_MASK, reg << MP886X_SLEW_SHIFT);
} }
static void mp886x_set_switch_freq(struct mp886x_device_info *di,
struct regmap *regmap,
u32 freq)
{
const struct mp886x_cfg_info *ci = di->ci;
int i;
for (i = 0; i < ARRAY_SIZE(ci->switch_freq); i++) {
if (freq == ci->switch_freq[i]) {
regmap_update_bits(regmap, ci->fs_reg,
0x3 << ci->fs_shift, i << ci->fs_shift);
return;
}
}
dev_err(di->dev, "invalid frequency %d\n", freq);
}
static int mp886x_set_mode(struct regulator_dev *rdev, unsigned int mode) static int mp886x_set_mode(struct regulator_dev *rdev, unsigned int mode)
{ {
switch (mode) { switch (mode) {
@@ -162,6 +184,14 @@ static const struct mp886x_cfg_info mp8869_ci = {
1250, 1250,
625, 625,
}, },
.switch_freq = {
500000,
750000,
1000000,
1250000,
},
.fs_reg = MP8869_SYSCNTLREG2,
.fs_shift = 4,
}; };
static int mp8867_set_voltage_sel(struct regulator_dev *rdev, unsigned int sel) static int mp8867_set_voltage_sel(struct regulator_dev *rdev, unsigned int sel)
@@ -233,6 +263,14 @@ static const struct mp886x_cfg_info mp8867_ci = {
1000, 1000,
500, 500,
}, },
.switch_freq = {
500000,
750000,
1000000,
1500000,
},
.fs_reg = MP886X_SYSCNTLREG1,
.fs_shift = 1,
}; };
static int mp886x_regulator_register(struct mp886x_device_info *di, static int mp886x_regulator_register(struct mp886x_device_info *di,
@@ -273,6 +311,7 @@ static int mp886x_i2c_probe(struct i2c_client *client)
struct mp886x_device_info *di; struct mp886x_device_info *di;
struct regulator_config config = { }; struct regulator_config config = { };
struct regmap *regmap; struct regmap *regmap;
u32 freq;
int ret; int ret;
di = devm_kzalloc(dev, sizeof(struct mp886x_device_info), GFP_KERNEL); di = devm_kzalloc(dev, sizeof(struct mp886x_device_info), GFP_KERNEL);
@@ -310,6 +349,9 @@ static int mp886x_i2c_probe(struct i2c_client *client)
config.driver_data = di; config.driver_data = di;
config.of_node = np; config.of_node = np;
if (!of_property_read_u32(np, "mps,switch-frequency", &freq))
mp886x_set_switch_freq(di, regmap, freq);
ret = mp886x_regulator_register(di, &config); ret = mp886x_regulator_register(di, &config);
if (ret < 0) if (ret < 0)
dev_err(dev, "Failed to register regulator!\n"); dev_err(dev, "Failed to register regulator!\n");