xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
40a865500c4d408b552cf5899bf091ac72e32bf8
android_kernel_xiaomi_sm8450/drivers/regulator/as3722-regulator.c
Jon Hunter 40a865500c regulator: as3722: Add bypass support for LDO6 
LD06 on the AS3722 power management IC supports a bypass mode. Bypass
is enabled for the LDO by writing the value 0x3F to the voltage select
field in the control register for the LDO. Note that this is the same
register and field that is used to select the voltage as well for the
LDO.

Add support for bypass on LDO6 by specifying the various bypass
parameters for regulator and adding new function pointer tables for the
LDO. Note that the bypass OFF value is the same as the ON value simply
because there is no actual OFF value and bypass will be disabled when
a new voltage is written to the VSEL field.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-11 15:15:36 +01:00

974 lines
28 KiB
C
Raw Blame History

/*
* Voltage regulator support for AMS AS3722 PMIC
*
* Copyright (C) 2013 ams
*
* Author: Florian Lobmaier <florian.lobmaier@ams.com>
* Author: Laxman Dewangan <ldewangan@nvidia.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mfd/as3722.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>
/* Regulator IDs */
enum as3722_regulators_id {
AS3722_REGULATOR_ID_SD0,
AS3722_REGULATOR_ID_SD1,
AS3722_REGULATOR_ID_SD2,
AS3722_REGULATOR_ID_SD3,
AS3722_REGULATOR_ID_SD4,
AS3722_REGULATOR_ID_SD5,
AS3722_REGULATOR_ID_SD6,
AS3722_REGULATOR_ID_LDO0,
AS3722_REGULATOR_ID_LDO1,
AS3722_REGULATOR_ID_LDO2,
AS3722_REGULATOR_ID_LDO3,
AS3722_REGULATOR_ID_LDO4,
AS3722_REGULATOR_ID_LDO5,
AS3722_REGULATOR_ID_LDO6,
AS3722_REGULATOR_ID_LDO7,
AS3722_REGULATOR_ID_LDO9,
AS3722_REGULATOR_ID_LDO10,
AS3722_REGULATOR_ID_LDO11,
AS3722_REGULATOR_ID_MAX,
};
struct as3722_register_mapping {
u8 regulator_id;
const char *name;
const char *sname;
u8 vsel_reg;
u8 vsel_mask;
int n_voltages;
u32 enable_reg;
u8 enable_mask;
u32 control_reg;
u8 mode_mask;
u32 sleep_ctrl_reg;
u8 sleep_ctrl_mask;
};
struct as3722_regulator_config_data {
struct regulator_init_data *reg_init;
bool enable_tracking;
int ext_control;
};
struct as3722_regulators {
struct device *dev;
struct as3722 *as3722;
struct regulator_dev *rdevs[AS3722_REGULATOR_ID_MAX];
struct regulator_desc desc[AS3722_REGULATOR_ID_MAX];
struct as3722_regulator_config_data
reg_config_data[AS3722_REGULATOR_ID_MAX];
};
static const struct as3722_register_mapping as3722_reg_lookup[] = {
{
.regulator_id = AS3722_REGULATOR_ID_SD0,
.name = "as3722-sd0",
.vsel_reg = AS3722_SD0_VOLTAGE_REG,
.vsel_mask = AS3722_SD_VSEL_MASK,
.enable_reg = AS3722_SD_CONTROL_REG,
.enable_mask = AS3722_SDn_CTRL(0),
.sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
.sleep_ctrl_mask = AS3722_SD0_EXT_ENABLE_MASK,
.control_reg = AS3722_SD0_CONTROL_REG,
.mode_mask = AS3722_SD0_MODE_FAST,
},
{
.regulator_id = AS3722_REGULATOR_ID_SD1,
.name = "as3722-sd1",
.vsel_reg = AS3722_SD1_VOLTAGE_REG,
.vsel_mask = AS3722_SD_VSEL_MASK,
.enable_reg = AS3722_SD_CONTROL_REG,
.enable_mask = AS3722_SDn_CTRL(1),
.sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
.sleep_ctrl_mask = AS3722_SD1_EXT_ENABLE_MASK,
.control_reg = AS3722_SD1_CONTROL_REG,
.mode_mask = AS3722_SD1_MODE_FAST,
},
{
.regulator_id = AS3722_REGULATOR_ID_SD2,
.name = "as3722-sd2",
.sname = "vsup-sd2",
.vsel_reg = AS3722_SD2_VOLTAGE_REG,
.vsel_mask = AS3722_SD_VSEL_MASK,
.enable_reg = AS3722_SD_CONTROL_REG,
.enable_mask = AS3722_SDn_CTRL(2),
.sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
.sleep_ctrl_mask = AS3722_SD2_EXT_ENABLE_MASK,
.control_reg = AS3722_SD23_CONTROL_REG,
.mode_mask = AS3722_SD2_MODE_FAST,
.n_voltages = AS3722_SD2_VSEL_MAX + 1,
},
{
.regulator_id = AS3722_REGULATOR_ID_SD3,
.name = "as3722-sd3",
.sname = "vsup-sd3",
.vsel_reg = AS3722_SD3_VOLTAGE_REG,
.vsel_mask = AS3722_SD_VSEL_MASK,
.enable_reg = AS3722_SD_CONTROL_REG,
.enable_mask = AS3722_SDn_CTRL(3),
.sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
.sleep_ctrl_mask = AS3722_SD3_EXT_ENABLE_MASK,
.control_reg = AS3722_SD23_CONTROL_REG,
.mode_mask = AS3722_SD3_MODE_FAST,
.n_voltages = AS3722_SD2_VSEL_MAX + 1,
},
{
.regulator_id = AS3722_REGULATOR_ID_SD4,
.name = "as3722-sd4",
.sname = "vsup-sd4",
.vsel_reg = AS3722_SD4_VOLTAGE_REG,
.vsel_mask = AS3722_SD_VSEL_MASK,
.enable_reg = AS3722_SD_CONTROL_REG,
.enable_mask = AS3722_SDn_CTRL(4),
.sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
.sleep_ctrl_mask = AS3722_SD4_EXT_ENABLE_MASK,
.control_reg = AS3722_SD4_CONTROL_REG,
.mode_mask = AS3722_SD4_MODE_FAST,
.n_voltages = AS3722_SD2_VSEL_MAX + 1,
},
{
.regulator_id = AS3722_REGULATOR_ID_SD5,
.name = "as3722-sd5",
.sname = "vsup-sd5",
.vsel_reg = AS3722_SD5_VOLTAGE_REG,
.vsel_mask = AS3722_SD_VSEL_MASK,
.enable_reg = AS3722_SD_CONTROL_REG,
.enable_mask = AS3722_SDn_CTRL(5),
.sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
.sleep_ctrl_mask = AS3722_SD5_EXT_ENABLE_MASK,
.control_reg = AS3722_SD5_CONTROL_REG,
.mode_mask = AS3722_SD5_MODE_FAST,
.n_voltages = AS3722_SD2_VSEL_MAX + 1,
},
{
.regulator_id = AS3722_REGULATOR_ID_SD6,
.name = "as3722-sd6",
.vsel_reg = AS3722_SD6_VOLTAGE_REG,
.vsel_mask = AS3722_SD_VSEL_MASK,
.enable_reg = AS3722_SD_CONTROL_REG,
.enable_mask = AS3722_SDn_CTRL(6),
.sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
.sleep_ctrl_mask = AS3722_SD6_EXT_ENABLE_MASK,
.control_reg = AS3722_SD6_CONTROL_REG,
.mode_mask = AS3722_SD6_MODE_FAST,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO0,
.name = "as3722-ldo0",
.sname = "vin-ldo0",
.vsel_reg = AS3722_LDO0_VOLTAGE_REG,
.vsel_mask = AS3722_LDO0_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL0_REG,
.enable_mask = AS3722_LDO0_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
.sleep_ctrl_mask = AS3722_LDO0_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO0_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO1,
.name = "as3722-ldo1",
.sname = "vin-ldo1-6",
.vsel_reg = AS3722_LDO1_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL0_REG,
.enable_mask = AS3722_LDO1_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
.sleep_ctrl_mask = AS3722_LDO1_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO2,
.name = "as3722-ldo2",
.sname = "vin-ldo2-5-7",
.vsel_reg = AS3722_LDO2_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL0_REG,
.enable_mask = AS3722_LDO2_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
.sleep_ctrl_mask = AS3722_LDO2_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO3,
.name = "as3722-ldo3",
.sname = "vin-ldo3-4",
.vsel_reg = AS3722_LDO3_VOLTAGE_REG,
.vsel_mask = AS3722_LDO3_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL0_REG,
.enable_mask = AS3722_LDO3_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
.sleep_ctrl_mask = AS3722_LDO3_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO3_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO4,
.name = "as3722-ldo4",
.sname = "vin-ldo3-4",
.vsel_reg = AS3722_LDO4_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL0_REG,
.enable_mask = AS3722_LDO4_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
.sleep_ctrl_mask = AS3722_LDO4_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO5,
.name = "as3722-ldo5",
.sname = "vin-ldo2-5-7",
.vsel_reg = AS3722_LDO5_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL0_REG,
.enable_mask = AS3722_LDO5_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
.sleep_ctrl_mask = AS3722_LDO5_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO6,
.name = "as3722-ldo6",
.sname = "vin-ldo1-6",
.vsel_reg = AS3722_LDO6_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL0_REG,
.enable_mask = AS3722_LDO6_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
.sleep_ctrl_mask = AS3722_LDO6_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO7,
.name = "as3722-ldo7",
.sname = "vin-ldo2-5-7",
.vsel_reg = AS3722_LDO7_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL0_REG,
.enable_mask = AS3722_LDO7_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
.sleep_ctrl_mask = AS3722_LDO7_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO9,
.name = "as3722-ldo9",
.sname = "vin-ldo9-10",
.vsel_reg = AS3722_LDO9_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL1_REG,
.enable_mask = AS3722_LDO9_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
.sleep_ctrl_mask = AS3722_LDO9_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO10,
.name = "as3722-ldo10",
.sname = "vin-ldo9-10",
.vsel_reg = AS3722_LDO10_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL1_REG,
.enable_mask = AS3722_LDO10_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
.sleep_ctrl_mask = AS3722_LDO10_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
{
.regulator_id = AS3722_REGULATOR_ID_LDO11,
.name = "as3722-ldo11",
.sname = "vin-ldo11",
.vsel_reg = AS3722_LDO11_VOLTAGE_REG,
.vsel_mask = AS3722_LDO_VSEL_MASK,
.enable_reg = AS3722_LDOCONTROL1_REG,
.enable_mask = AS3722_LDO11_CTRL,
.sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
.sleep_ctrl_mask = AS3722_LDO11_EXT_ENABLE_MASK,
.n_voltages = AS3722_LDO_NUM_VOLT,
},
};
static const int as3722_ldo_current[] = { 150000, 300000 };
static const int as3722_sd016_current[] = { 2500000, 3000000, 3500000 };
static int as3722_current_to_index(int min_uA, int max_uA,
const int *curr_table, int n_currents)
{
int i;
for (i = n_currents - 1; i >= 0; i--) {
if ((min_uA <= curr_table[i]) && (curr_table[i] <= max_uA))
return i;
}
return -EINVAL;
}
static int as3722_ldo_get_current_limit(struct regulator_dev *rdev)
{
struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
struct as3722 *as3722 = as3722_regs->as3722;
int id = rdev_get_id(rdev);
u32 val;
int ret;
ret = as3722_read(as3722, as3722_reg_lookup[id].vsel_reg, &val);
if (ret < 0) {
dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
as3722_reg_lookup[id].vsel_reg, ret);
return ret;
}
if (val & AS3722_LDO_ILIMIT_MASK)
return 300000;
return 150000;
}
static int as3722_ldo_set_current_limit(struct regulator_dev *rdev,
int min_uA, int max_uA)
{
struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
struct as3722 *as3722 = as3722_regs->as3722;
int id = rdev_get_id(rdev);
int ret;
u32 reg = 0;
ret = as3722_current_to_index(min_uA, max_uA, as3722_ldo_current,
ARRAY_SIZE(as3722_ldo_current));
if (ret < 0) {
dev_err(as3722_regs->dev,
"Current range min:max = %d:%d does not support\n",
min_uA, max_uA);
return ret;
}
if (ret)
reg = AS3722_LDO_ILIMIT_BIT;
return as3722_update_bits(as3722, as3722_reg_lookup[id].vsel_reg,
AS3722_LDO_ILIMIT_MASK, reg);
}
static struct regulator_ops as3722_ldo0_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.list_voltage = regulator_list_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_current_limit = as3722_ldo_get_current_limit,
.set_current_limit = as3722_ldo_set_current_limit,
};
static struct regulator_ops as3722_ldo0_extcntrl_ops = {
.list_voltage = regulator_list_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_current_limit = as3722_ldo_get_current_limit,
.set_current_limit = as3722_ldo_set_current_limit,
};
static int as3722_ldo3_set_tracking_mode(struct as3722_regulators *as3722_reg,
int id, u8 mode)
{
struct as3722 *as3722 = as3722_reg->as3722;
switch (mode) {
case AS3722_LDO3_MODE_PMOS:
case AS3722_LDO3_MODE_PMOS_TRACKING:
case AS3722_LDO3_MODE_NMOS:
case AS3722_LDO3_MODE_SWITCH:
return as3722_update_bits(as3722,
as3722_reg_lookup[id].vsel_reg,
AS3722_LDO3_MODE_MASK, mode);
default:
return -EINVAL;
}
}
static int as3722_ldo3_get_current_limit(struct regulator_dev *rdev)
{
return 150000;
}
static struct regulator_ops as3722_ldo3_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.list_voltage = regulator_list_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_current_limit = as3722_ldo3_get_current_limit,
};
static struct regulator_ops as3722_ldo3_extcntrl_ops = {
.list_voltage = regulator_list_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_current_limit = as3722_ldo3_get_current_limit,
};
static struct regulator_ops as3722_ldo6_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.get_current_limit = as3722_ldo_get_current_limit,
.set_current_limit = as3722_ldo_set_current_limit,
.get_bypass = regulator_get_bypass_regmap,
.set_bypass = regulator_set_bypass_regmap,
};
static struct regulator_ops as3722_ldo6_extcntrl_ops = {
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.get_current_limit = as3722_ldo_get_current_limit,
.set_current_limit = as3722_ldo_set_current_limit,
.get_bypass = regulator_get_bypass_regmap,
.set_bypass = regulator_set_bypass_regmap,
};
static const struct regulator_linear_range as3722_ldo_ranges[] = {
REGULATOR_LINEAR_RANGE(0, 0x00, 0x00, 0),
REGULATOR_LINEAR_RANGE(825000, 0x01, 0x24, 25000),
REGULATOR_LINEAR_RANGE(1725000, 0x40, 0x7F, 25000),
};
static struct regulator_ops as3722_ldo_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.get_current_limit = as3722_ldo_get_current_limit,
.set_current_limit = as3722_ldo_set_current_limit,
};
static struct regulator_ops as3722_ldo_extcntrl_ops = {
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.get_current_limit = as3722_ldo_get_current_limit,
.set_current_limit = as3722_ldo_set_current_limit,
};
static unsigned int as3722_sd_get_mode(struct regulator_dev *rdev)
{
struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
struct as3722 *as3722 = as3722_regs->as3722;
int id = rdev_get_id(rdev);
u32 val;
int ret;
if (!as3722_reg_lookup[id].control_reg)
return -ENOTSUPP;
ret = as3722_read(as3722, as3722_reg_lookup[id].control_reg, &val);
if (ret < 0) {
dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
as3722_reg_lookup[id].control_reg, ret);
return ret;
}
if (val & as3722_reg_lookup[id].mode_mask)
return REGULATOR_MODE_FAST;
else
return REGULATOR_MODE_NORMAL;
}
static int as3722_sd_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
struct as3722 *as3722 = as3722_regs->as3722;
u8 id = rdev_get_id(rdev);
u8 val = 0;
int ret;
if (!as3722_reg_lookup[id].control_reg)
return -ERANGE;
switch (mode) {
case REGULATOR_MODE_FAST:
val = as3722_reg_lookup[id].mode_mask;
case REGULATOR_MODE_NORMAL: /* fall down */
break;
default:
return -EINVAL;
}
ret = as3722_update_bits(as3722, as3722_reg_lookup[id].control_reg,
as3722_reg_lookup[id].mode_mask, val);
if (ret < 0) {
dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n",
as3722_reg_lookup[id].control_reg, ret);
return ret;
}
return ret;
}
static int as3722_sd016_get_current_limit(struct regulator_dev *rdev)
{
struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
struct as3722 *as3722 = as3722_regs->as3722;
int id = rdev_get_id(rdev);
u32 val, reg;
int mask;
int ret;
switch (id) {
case AS3722_REGULATOR_ID_SD0:
reg = AS3722_OVCURRENT_REG;
mask = AS3722_OVCURRENT_SD0_TRIP_MASK;
break;
case AS3722_REGULATOR_ID_SD1:
reg = AS3722_OVCURRENT_REG;
mask = AS3722_OVCURRENT_SD1_TRIP_MASK;
break;
case AS3722_REGULATOR_ID_SD6:
reg = AS3722_OVCURRENT_DEB_REG;
mask = AS3722_OVCURRENT_SD6_TRIP_MASK;
break;
default:
return -EINVAL;
}
ret = as3722_read(as3722, reg, &val);
if (ret < 0) {
dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
reg, ret);
return ret;
}
val &= mask;
val >>= ffs(mask) - 1;
if (val == 3)
return -EINVAL;
return as3722_sd016_current[val];
}
static int as3722_sd016_set_current_limit(struct regulator_dev *rdev,
int min_uA, int max_uA)
{
struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
struct as3722 *as3722 = as3722_regs->as3722;
int id = rdev_get_id(rdev);
int ret;
int val;
int mask;
u32 reg;
ret = as3722_current_to_index(min_uA, max_uA, as3722_sd016_current,
ARRAY_SIZE(as3722_sd016_current));
if (ret < 0) {
dev_err(as3722_regs->dev,
"Current range min:max = %d:%d does not support\n",
min_uA, max_uA);
return ret;
}
switch (id) {
case AS3722_REGULATOR_ID_SD0:
reg = AS3722_OVCURRENT_REG;
mask = AS3722_OVCURRENT_SD0_TRIP_MASK;
break;
case AS3722_REGULATOR_ID_SD1:
reg = AS3722_OVCURRENT_REG;
mask = AS3722_OVCURRENT_SD1_TRIP_MASK;
break;
case AS3722_REGULATOR_ID_SD6:
reg = AS3722_OVCURRENT_DEB_REG;
mask = AS3722_OVCURRENT_SD6_TRIP_MASK;
break;
default:
return -EINVAL;
}
ret <<= ffs(mask) - 1;
val = ret & mask;
return as3722_update_bits(as3722, reg, mask, val);
}
static bool as3722_sd0_is_low_voltage(struct as3722_regulators *as3722_regs)
{
int err;
unsigned val;
err = as3722_read(as3722_regs->as3722, AS3722_FUSE7_REG, &val);
if (err < 0) {
dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
AS3722_FUSE7_REG, err);
return false;
}
if (val & AS3722_FUSE7_SD0_LOW_VOLTAGE)
return true;
return false;
}
static const struct regulator_linear_range as3722_sd2345_ranges[] = {
REGULATOR_LINEAR_RANGE(0, 0x00, 0x00, 0),
REGULATOR_LINEAR_RANGE(612500, 0x01, 0x40, 12500),
REGULATOR_LINEAR_RANGE(1425000, 0x41, 0x70, 25000),
REGULATOR_LINEAR_RANGE(2650000, 0x71, 0x7F, 50000),
};
static struct regulator_ops as3722_sd016_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_current_limit = as3722_sd016_get_current_limit,
.set_current_limit = as3722_sd016_set_current_limit,
.get_mode = as3722_sd_get_mode,
.set_mode = as3722_sd_set_mode,
};
static struct regulator_ops as3722_sd016_extcntrl_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_current_limit = as3722_sd016_get_current_limit,
.set_current_limit = as3722_sd016_set_current_limit,
.get_mode = as3722_sd_get_mode,
.set_mode = as3722_sd_set_mode,
};
static struct regulator_ops as3722_sd2345_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.get_mode = as3722_sd_get_mode,
.set_mode = as3722_sd_set_mode,
};
static struct regulator_ops as3722_sd2345_extcntrl_ops = {
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.get_mode = as3722_sd_get_mode,
.set_mode = as3722_sd_set_mode,
};
static int as3722_extreg_init(struct as3722_regulators *as3722_regs, int id,
int ext_pwr_ctrl)
{
int ret;
unsigned int val;
if ((ext_pwr_ctrl < AS3722_EXT_CONTROL_ENABLE1) ||
(ext_pwr_ctrl > AS3722_EXT_CONTROL_ENABLE3))
return -EINVAL;
val = ext_pwr_ctrl << (ffs(as3722_reg_lookup[id].sleep_ctrl_mask) - 1);
ret = as3722_update_bits(as3722_regs->as3722,
as3722_reg_lookup[id].sleep_ctrl_reg,
as3722_reg_lookup[id].sleep_ctrl_mask, val);
if (ret < 0)
dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n",
as3722_reg_lookup[id].sleep_ctrl_reg, ret);
return ret;
}
static struct of_regulator_match as3722_regulator_matches[] = {
{ .name = "sd0", },
{ .name = "sd1", },
{ .name = "sd2", },
{ .name = "sd3", },
{ .name = "sd4", },
{ .name = "sd5", },
{ .name = "sd6", },
{ .name = "ldo0", },
{ .name = "ldo1", },
{ .name = "ldo2", },
{ .name = "ldo3", },
{ .name = "ldo4", },
{ .name = "ldo5", },
{ .name = "ldo6", },
{ .name = "ldo7", },
{ .name = "ldo9", },
{ .name = "ldo10", },
{ .name = "ldo11", },
};
static int as3722_get_regulator_dt_data(struct platform_device *pdev,
struct as3722_regulators *as3722_regs)
{
struct device_node *np;
struct as3722_regulator_config_data *reg_config;
u32 prop;
int id;
int ret;
np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
if (!np) {
dev_err(&pdev->dev, "Device is not having regulators node\n");
return -ENODEV;
}
pdev->dev.of_node = np;
ret = of_regulator_match(&pdev->dev, np, as3722_regulator_matches,
ARRAY_SIZE(as3722_regulator_matches));
of_node_put(np);
if (ret < 0) {
dev_err(&pdev->dev, "Parsing of regulator node failed: %d\n",
ret);
return ret;
}
for (id = 0; id < ARRAY_SIZE(as3722_regulator_matches); ++id) {
struct device_node *reg_node;
reg_config = &as3722_regs->reg_config_data[id];
reg_config->reg_init = as3722_regulator_matches[id].init_data;
reg_node = as3722_regulator_matches[id].of_node;
if (!reg_config->reg_init || !reg_node)
continue;
ret = of_property_read_u32(reg_node, "ams,ext-control", &prop);
if (!ret) {
if (prop < 3)
reg_config->ext_control = prop;
else
dev_warn(&pdev->dev,
"ext-control have invalid option: %u\n",
prop);
}
reg_config->enable_tracking =
of_property_read_bool(reg_node, "ams,enable-tracking");
}
return 0;
}
static int as3722_regulator_probe(struct platform_device *pdev)
{
struct as3722 *as3722 = dev_get_drvdata(pdev->dev.parent);
struct as3722_regulators *as3722_regs;
struct as3722_regulator_config_data *reg_config;
struct regulator_dev *rdev;
struct regulator_config config = { };
struct regulator_ops *ops;
int id;
int ret;
as3722_regs = devm_kzalloc(&pdev->dev, sizeof(*as3722_regs),
GFP_KERNEL);
if (!as3722_regs)
return -ENOMEM;
as3722_regs->dev = &pdev->dev;
as3722_regs->as3722 = as3722;
platform_set_drvdata(pdev, as3722_regs);
ret = as3722_get_regulator_dt_data(pdev, as3722_regs);
if (ret < 0)
return ret;
config.dev = &pdev->dev;
config.driver_data = as3722_regs;
config.regmap = as3722->regmap;
for (id = 0; id < AS3722_REGULATOR_ID_MAX; id++) {
reg_config = &as3722_regs->reg_config_data[id];
as3722_regs->desc[id].name = as3722_reg_lookup[id].name;
as3722_regs->desc[id].supply_name = as3722_reg_lookup[id].sname;
as3722_regs->desc[id].id = as3722_reg_lookup[id].regulator_id;
as3722_regs->desc[id].n_voltages =
as3722_reg_lookup[id].n_voltages;
as3722_regs->desc[id].type = REGULATOR_VOLTAGE;
as3722_regs->desc[id].owner = THIS_MODULE;
as3722_regs->desc[id].enable_reg =
as3722_reg_lookup[id].enable_reg;
as3722_regs->desc[id].enable_mask =
as3722_reg_lookup[id].enable_mask;
as3722_regs->desc[id].vsel_reg = as3722_reg_lookup[id].vsel_reg;
as3722_regs->desc[id].vsel_mask =
as3722_reg_lookup[id].vsel_mask;
switch (id) {
case AS3722_REGULATOR_ID_LDO0:
if (reg_config->ext_control)
ops = &as3722_ldo0_extcntrl_ops;
else
ops = &as3722_ldo0_ops;
as3722_regs->desc[id].min_uV = 825000;
as3722_regs->desc[id].uV_step = 25000;
as3722_regs->desc[id].linear_min_sel = 1;
as3722_regs->desc[id].enable_time = 500;
break;
case AS3722_REGULATOR_ID_LDO3:
if (reg_config->ext_control)
ops = &as3722_ldo3_extcntrl_ops;
else
ops = &as3722_ldo3_ops;
as3722_regs->desc[id].min_uV = 620000;
as3722_regs->desc[id].uV_step = 20000;
as3722_regs->desc[id].linear_min_sel = 1;
as3722_regs->desc[id].enable_time = 500;
if (reg_config->enable_tracking) {
ret = as3722_ldo3_set_tracking_mode(as3722_regs,
id, AS3722_LDO3_MODE_PMOS_TRACKING);
if (ret < 0) {
dev_err(&pdev->dev,
"LDO3 tracking failed: %d\n",
ret);
return ret;
}
}
break;
case AS3722_REGULATOR_ID_LDO6:
if (reg_config->ext_control)
ops = &as3722_ldo6_extcntrl_ops;
else
ops = &as3722_ldo6_ops;
as3722_regs->desc[id].enable_time = 500;
as3722_regs->desc[id].bypass_reg =
AS3722_LDO6_VOLTAGE_REG;
as3722_regs->desc[id].bypass_mask =
AS3722_LDO_VSEL_MASK;
as3722_regs->desc[id].bypass_val_on =
AS3722_LDO6_VSEL_BYPASS;
as3722_regs->desc[id].bypass_val_off =
AS3722_LDO6_VSEL_BYPASS;
as3722_regs->desc[id].linear_ranges = as3722_ldo_ranges;
as3722_regs->desc[id].n_linear_ranges =
ARRAY_SIZE(as3722_ldo_ranges);
break;
case AS3722_REGULATOR_ID_SD0:
case AS3722_REGULATOR_ID_SD1:
case AS3722_REGULATOR_ID_SD6:
if (reg_config->ext_control)
ops = &as3722_sd016_extcntrl_ops;
else
ops = &as3722_sd016_ops;
if (id == AS3722_REGULATOR_ID_SD0 &&
as3722_sd0_is_low_voltage(as3722_regs)) {
as3722_regs->desc[id].n_voltages =
AS3722_SD0_VSEL_LOW_VOL_MAX + 1;
as3722_regs->desc[id].min_uV = 410000;
} else {
as3722_regs->desc[id].n_voltages =
AS3722_SD0_VSEL_MAX + 1,
as3722_regs->desc[id].min_uV = 610000;
}
as3722_regs->desc[id].uV_step = 10000;
as3722_regs->desc[id].linear_min_sel = 1;
as3722_regs->desc[id].enable_time = 600;
break;
case AS3722_REGULATOR_ID_SD2:
case AS3722_REGULATOR_ID_SD3:
case AS3722_REGULATOR_ID_SD4:
case AS3722_REGULATOR_ID_SD5:
if (reg_config->ext_control)
ops = &as3722_sd2345_extcntrl_ops;
else
ops = &as3722_sd2345_ops;
as3722_regs->desc[id].linear_ranges =
as3722_sd2345_ranges;
as3722_regs->desc[id].n_linear_ranges =
ARRAY_SIZE(as3722_sd2345_ranges);
break;
default:
if (reg_config->ext_control)
ops = &as3722_ldo_extcntrl_ops;
else
ops = &as3722_ldo_ops;
as3722_regs->desc[id].enable_time = 500;
as3722_regs->desc[id].linear_ranges = as3722_ldo_ranges;
as3722_regs->desc[id].n_linear_ranges =
ARRAY_SIZE(as3722_ldo_ranges);
break;
}
as3722_regs->desc[id].ops = ops;
config.init_data = reg_config->reg_init;
config.of_node = as3722_regulator_matches[id].of_node;
rdev = devm_regulator_register(&pdev->dev,
&as3722_regs->desc[id], &config);
if (IS_ERR(rdev)) {
ret = PTR_ERR(rdev);
dev_err(&pdev->dev, "regulator %d register failed %d\n",
id, ret);
return ret;
}
as3722_regs->rdevs[id] = rdev;
if (reg_config->ext_control) {
ret = regulator_enable_regmap(rdev);
if (ret < 0) {
dev_err(&pdev->dev,
"Regulator %d enable failed: %d\n",
id, ret);
return ret;
}
ret = as3722_extreg_init(as3722_regs, id,
reg_config->ext_control);
if (ret < 0) {
dev_err(&pdev->dev,
"AS3722 ext control failed: %d", ret);
return ret;
}
}
}
return 0;
}
static const struct of_device_id of_as3722_regulator_match[] = {
{ .compatible = "ams,as3722-regulator", },
{},
};
MODULE_DEVICE_TABLE(of, of_as3722_regulator_match);
static struct platform_driver as3722_regulator_driver = {
.driver = {
.name = "as3722-regulator",
.of_match_table = of_as3722_regulator_match,
},
.probe = as3722_regulator_probe,
};
module_platform_driver(as3722_regulator_driver);
MODULE_ALIAS("platform:as3722-regulator");
MODULE_DESCRIPTION("AS3722 regulator driver");
MODULE_AUTHOR("Florian Lobmaier <florian.lobmaier@ams.com>");
MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
MODULE_LICENSE("GPL");
Reference in New Issue View Git Blame Copy Permalink