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Subject[PATCH 08/73] regulator: ab8500: Added get_optimum_mode on regulators with idle mode
Date
From: Bengt Jonsson <bengt.g.jonsson@stericsson.com>

With this change, Vtvout, Vintcore12, Vaux1, 2 and 3 regulators
support DRMS (Dynamic Regulator Mode Switching) which will
dynamically handle requests for max current consumption from
several consumers and select a suitable regulator mode.

Signed-off-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Mattias WALLIN <mattias.wallin@stericsson.com>
---
drivers/regulator/ab8500.c | 115 +++++++++++++++++++++++++++++++++-----------
1 file changed, 88 insertions(+), 27 deletions(-)

diff --git a/drivers/regulator/ab8500.c b/drivers/regulator/ab8500.c
index 791e821..d0ce436 100644
--- a/drivers/regulator/ab8500.c
+++ b/drivers/regulator/ab8500.c
@@ -31,6 +31,7 @@
* @desc: regulator description
* @regulator_dev: regulator device
* @is_enabled: status of regulator (on/off)
+ * @load_lp_uA: maximum load in idle (low power) mode
* @update_bank: bank to control on/off
* @update_reg: register to control on/off
* @update_mask: mask to enable/disable and set mode of regulator
@@ -48,6 +49,7 @@ struct ab8500_regulator_info {
struct regulator_desc desc;
struct regulator_dev *regulator;
bool is_enabled;
+ int load_lp_uA;
u8 update_bank;
u8 update_reg;
u8 update_mask;
@@ -156,6 +158,27 @@ static int ab8500_regulator_disable(struct regulator_dev *rdev)
return ret;
}

+static unsigned int ab8500_regulator_get_optimum_mode(
+ struct regulator_dev *rdev, int input_uV,
+ int output_uV, int load_uA)
+{
+ unsigned int mode;
+
+ struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
+
+ if (info == NULL) {
+ dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
+ return -EINVAL;
+ }
+
+ if (load_uA <= info->load_lp_uA)
+ mode = REGULATOR_MODE_IDLE;
+ else
+ mode = REGULATOR_MODE_NORMAL;
+
+ return mode;
+}
+
static int ab8500_regulator_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
@@ -186,6 +209,12 @@ static int ab8500_regulator_set_mode(struct regulator_dev *rdev,
if (ret < 0)
dev_err(rdev_get_dev(rdev),
"couldn't set regulator mode\n");
+
+ dev_vdbg(rdev_get_dev(rdev),
+ "%s-set_mode (bank, reg, mask, value): "
+ "0x%x, 0x%x, 0x%x, 0x%x\n",
+ info->desc.name, info->update_bank, info->update_reg,
+ info->update_mask, info->update_val);
}

return ret;
@@ -313,29 +342,43 @@ static int ab8500_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
return info->delay;
}

-static struct regulator_ops ab8500_regulator_ops = {
- .enable = ab8500_regulator_enable,
- .disable = ab8500_regulator_disable,
- .set_mode = ab8500_regulator_set_mode,
- .get_mode = ab8500_regulator_get_mode,
- .is_enabled = ab8500_regulator_is_enabled,
- .get_voltage_sel = ab8500_regulator_get_voltage_sel,
- .set_voltage_sel = ab8500_regulator_set_voltage_sel,
- .list_voltage = regulator_list_voltage_table,
- .set_voltage_time_sel = ab8500_regulator_set_voltage_time_sel,
+static struct regulator_ops ab8500_regulator_volt_mode_ops = {
+ .enable = ab8500_regulator_enable,
+ .disable = ab8500_regulator_disable,
+ .is_enabled = ab8500_regulator_is_enabled,
+ .get_optimum_mode = ab8500_regulator_get_optimum_mode,
+ .set_mode = ab8500_regulator_set_mode,
+ .get_mode = ab8500_regulator_get_mode,
+ .get_voltage_sel = ab8500_regulator_get_voltage_sel,
+ .set_voltage_sel = ab8500_regulator_set_voltage_sel,
+ .list_voltage = regulator_list_voltage_table,
+ .set_voltage_time_sel = ab8500_regulator_set_voltage_time_sel,
};

-static struct regulator_ops ab8500_regulator_fixed_ops = {
- .enable = ab8500_regulator_enable,
- .disable = ab8500_regulator_disable,
- .is_enabled = ab8500_regulator_is_enabled,
- .list_voltage = regulator_list_voltage_linear,
+static struct regulator_ops ab8500_regulator_mode_ops = {
+ .enable = ab8500_regulator_enable,
+ .disable = ab8500_regulator_disable,
+ .is_enabled = ab8500_regulator_is_enabled,
+ .get_optimum_mode = ab8500_regulator_get_optimum_mode,
+ .set_mode = ab8500_regulator_set_mode,
+ .get_mode = ab8500_regulator_get_mode,
+ .get_voltage_sel = ab8500_regulator_get_voltage_sel,
+ .list_voltage = regulator_list_voltage_table,
+ .set_voltage_time_sel = ab8500_regulator_set_voltage_time_sel,
+};
+
+static struct regulator_ops ab8500_regulator_ops = {
+ .enable = ab8500_regulator_enable,
+ .disable = ab8500_regulator_disable,
+ .is_enabled = ab8500_regulator_is_enabled,
+ .get_voltage_sel = ab8500_regulator_get_voltage_sel,
+ .list_voltage = regulator_list_voltage_table,
};

static struct ab8500_regulator_info
ab8500_regulator_info[AB8500_NUM_REGULATORS] = {
/*
- * Variable Voltage Regulators
+ * Regulators with variable voltage and normal/idle modes
* name, min mV, max mV,
* update bank, reg, mask, enable val
* volt bank, reg, mask
@@ -343,13 +386,14 @@ static struct ab8500_regulator_info
[AB8500_LDO_AUX1] = {
.desc = {
.name = "LDO-AUX1",
- .ops = &ab8500_regulator_ops,
+ .ops = &ab8500_regulator_volt_mode_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_AUX1,
.owner = THIS_MODULE,
.n_voltages = ARRAY_SIZE(ldo_vauxn_voltages),
.volt_table = ldo_vauxn_voltages,
},
+ .load_lp_uA = 5000,
.update_bank = 0x04,
.update_reg = 0x09,
.update_mask = 0x03,
@@ -363,13 +407,14 @@ static struct ab8500_regulator_info
[AB8500_LDO_AUX2] = {
.desc = {
.name = "LDO-AUX2",
- .ops = &ab8500_regulator_ops,
+ .ops = &ab8500_regulator_volt_mode_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_AUX2,
.owner = THIS_MODULE,
.n_voltages = ARRAY_SIZE(ldo_vauxn_voltages),
.volt_table = ldo_vauxn_voltages,
},
+ .load_lp_uA = 5000,
.update_bank = 0x04,
.update_reg = 0x09,
.update_mask = 0x0c,
@@ -383,13 +428,14 @@ static struct ab8500_regulator_info
[AB8500_LDO_AUX3] = {
.desc = {
.name = "LDO-AUX3",
- .ops = &ab8500_regulator_ops,
+ .ops = &ab8500_regulator_volt_mode_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_AUX3,
.owner = THIS_MODULE,
.n_voltages = ARRAY_SIZE(ldo_vaux3_voltages),
.volt_table = ldo_vaux3_voltages,
},
+ .load_lp_uA = 5000,
.update_bank = 0x04,
.update_reg = 0x0a,
.update_mask = 0x03,
@@ -403,13 +449,14 @@ static struct ab8500_regulator_info
[AB8500_LDO_INTCORE] = {
.desc = {
.name = "LDO-INTCORE",
- .ops = &ab8500_regulator_ops,
+ .ops = &ab8500_regulator_volt_mode_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_INTCORE,
.owner = THIS_MODULE,
.n_voltages = ARRAY_SIZE(ldo_vintcore_voltages),
.volt_table = ldo_vintcore_voltages,
},
+ .load_lp_uA = 5000,
.update_bank = 0x03,
.update_reg = 0x80,
.update_mask = 0x44,
@@ -423,14 +470,14 @@ static struct ab8500_regulator_info
},

/*
- * Fixed Voltage Regulators
+ * Regulators with fixed voltage and normal/idle modes
* name, fixed mV,
* update bank, reg, mask, enable val
*/
[AB8500_LDO_TVOUT] = {
.desc = {
.name = "LDO-TVOUT",
- .ops = &ab8500_regulator_fixed_ops,
+ .ops = &ab8500_regulator_mode_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_TVOUT,
.owner = THIS_MODULE,
@@ -439,10 +486,13 @@ static struct ab8500_regulator_info
.enable_time = 10000,
},
.delay = 10000,
+ .load_lp_uA = 1000,
.update_bank = 0x03,
.update_reg = 0x80,
.update_mask = 0x82,
.update_val = 0x02,
+ .update_val_idle = 0x82,
+ .update_val_normal = 0x02,
},
[AB8500_LDO_USB] = {
.desc = {
@@ -459,10 +509,14 @@ static struct ab8500_regulator_info
.update_mask = 0x03,
.update_val_enable = 0x01,
},
+
+ /*
+ * Regulators with fixed voltage and normal mode
+ */
[AB8500_LDO_AUDIO] = {
.desc = {
.name = "LDO-AUDIO",
- .ops = &ab8500_regulator_fixed_ops,
+ .ops = &ab8500_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_AUDIO,
.owner = THIS_MODULE,
@@ -477,7 +531,7 @@ static struct ab8500_regulator_info
[AB8500_LDO_ANAMIC1] = {
.desc = {
.name = "LDO-ANAMIC1",
- .ops = &ab8500_regulator_fixed_ops,
+ .ops = &ab8500_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_ANAMIC1,
.owner = THIS_MODULE,
@@ -492,7 +546,7 @@ static struct ab8500_regulator_info
[AB8500_LDO_ANAMIC2] = {
.desc = {
.name = "LDO-ANAMIC2",
- .ops = &ab8500_regulator_fixed_ops,
+ .ops = &ab8500_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_ANAMIC2,
.owner = THIS_MODULE,
@@ -507,7 +561,7 @@ static struct ab8500_regulator_info
[AB8500_LDO_DMIC] = {
.desc = {
.name = "LDO-DMIC",
- .ops = &ab8500_regulator_fixed_ops,
+ .ops = &ab8500_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_DMIC,
.owner = THIS_MODULE,
@@ -519,20 +573,27 @@ static struct ab8500_regulator_info
.update_mask = 0x04,
.update_val = 0x04,
},
+
+ /*
+ * Regulators with fixed voltage and normal/idle modes
+ */
[AB8500_LDO_ANA] = {
.desc = {
.name = "LDO-ANA",
- .ops = &ab8500_regulator_fixed_ops,
+ .ops = &ab8500_regulator_mode_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_ANA,
.owner = THIS_MODULE,
.n_voltages = 1,
.min_uV = 1200000,
},
+ .load_lp_uA = 1000,
.update_bank = 0x04,
.update_reg = 0x06,
.update_mask = 0x0c,
.update_val = 0x04,
+ .update_val_idle = 0x0c,
+ .update_val_normal = 0x04,
},


--
1.7.9.5


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