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linux/drivers/regulator/da9062-regulator.c
Julia Lawall 71242b49a0 regulator: da9*: constify regulator_ops structures 
The regulator_ops structures are never modified, so declare them as const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-22 23:59:57 +00:00

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/*
* da9062-regulator.c - REGULATOR device driver for DA9062
* Copyright (C) 2015 Dialog Semiconductor Ltd.
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/mfd/da9062/core.h>
#include <linux/mfd/da9062/registers.h>
/* Regulator IDs */
enum {
DA9062_ID_BUCK1,
DA9062_ID_BUCK2,
DA9062_ID_BUCK3,
DA9062_ID_BUCK4,
DA9062_ID_LDO1,
DA9062_ID_LDO2,
DA9062_ID_LDO3,
DA9062_ID_LDO4,
DA9062_MAX_REGULATORS,
};
/* Regulator capabilities and registers description */
struct da9062_regulator_info {
struct regulator_desc desc;
/* Current limiting */
unsigned int n_current_limits;
const int *current_limits;
/* Main register fields */
struct reg_field mode;
struct reg_field suspend;
struct reg_field sleep;
struct reg_field suspend_sleep;
unsigned int suspend_vsel_reg;
struct reg_field ilimit;
/* Event detection bit */
struct reg_field oc_event;
};
/* Single regulator settings */
struct da9062_regulator {
struct regulator_desc desc;
struct regulator_dev *rdev;
struct da9062 *hw;
const struct da9062_regulator_info *info;
struct regmap_field *mode;
struct regmap_field *suspend;
struct regmap_field *sleep;
struct regmap_field *suspend_sleep;
struct regmap_field *ilimit;
};
/* Encapsulates all information for the regulators driver */
struct da9062_regulators {
int irq_ldo_lim;
unsigned n_regulators;
/* Array size to be defined during init. Keep at end. */
struct da9062_regulator regulator[0];
};
/* BUCK modes */
enum {
BUCK_MODE_MANUAL, /* 0 */
BUCK_MODE_SLEEP, /* 1 */
BUCK_MODE_SYNC, /* 2 */
BUCK_MODE_AUTO /* 3 */
};
/* Regulator operations */
/* Current limits array (in uA) BUCK1 and BUCK3.
Entry indexes corresponds to register values. */
static const int da9062_buck_a_limits[] = {
500000, 600000, 700000, 800000, 900000, 1000000, 1100000, 1200000,
1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000
};
/* Current limits array (in uA) for BUCK2.
Entry indexes corresponds to register values. */
static const int da9062_buck_b_limits[] = {
1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000
};
static int da9062_set_current_limit(struct regulator_dev *rdev,
int min_ua, int max_ua)
{
struct da9062_regulator *regl = rdev_get_drvdata(rdev);
const struct da9062_regulator_info *rinfo = regl->info;
int n, tval;
for (n = 0; n < rinfo->n_current_limits; n++) {
tval = rinfo->current_limits[n];
if (tval >= min_ua && tval <= max_ua)
return regmap_field_write(regl->ilimit, n);
}
return -EINVAL;
}
static int da9062_get_current_limit(struct regulator_dev *rdev)
{
struct da9062_regulator *regl = rdev_get_drvdata(rdev);
const struct da9062_regulator_info *rinfo = regl->info;
unsigned int sel;
int ret;
ret = regmap_field_read(regl->ilimit, &sel);
if (ret < 0)
return ret;
if (sel >= rinfo->n_current_limits)
sel = rinfo->n_current_limits - 1;
return rinfo->current_limits[sel];
}
static int da9062_buck_set_mode(struct regulator_dev *rdev, unsigned mode)
{
struct da9062_regulator *regl = rdev_get_drvdata(rdev);
unsigned val;
switch (mode) {
case REGULATOR_MODE_FAST:
val = BUCK_MODE_SYNC;
break;
case REGULATOR_MODE_NORMAL:
val = BUCK_MODE_AUTO;
break;
case REGULATOR_MODE_STANDBY:
val = BUCK_MODE_SLEEP;
break;
default:
return -EINVAL;
}
return regmap_field_write(regl->mode, val);
}
/*
* Bucks use single mode register field for normal operation
* and suspend state.
* There are 3 modes to map to: FAST, NORMAL, and STANDBY.
*/
static unsigned da9062_buck_get_mode(struct regulator_dev *rdev)
{
struct da9062_regulator *regl = rdev_get_drvdata(rdev);
struct regmap_field *field;
unsigned int val, mode = 0;
int ret;
ret = regmap_field_read(regl->mode, &val);
if (ret < 0)
return ret;
switch (val) {
default:
case BUCK_MODE_MANUAL:
mode = REGULATOR_MODE_FAST | REGULATOR_MODE_STANDBY;
/* Sleep flag bit decides the mode */
break;
case BUCK_MODE_SLEEP:
return REGULATOR_MODE_STANDBY;
case BUCK_MODE_SYNC:
return REGULATOR_MODE_FAST;
case BUCK_MODE_AUTO:
return REGULATOR_MODE_NORMAL;
}
/* Detect current regulator state */
ret = regmap_field_read(regl->suspend, &val);
if (ret < 0)
return 0;
/* Read regulator mode from proper register, depending on state */
if (val)
field = regl->suspend_sleep;
else
field = regl->sleep;
ret = regmap_field_read(field, &val);
if (ret < 0)
return 0;
if (val)
mode &= REGULATOR_MODE_STANDBY;
else
mode &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_FAST;
return mode;
}
/*
* LDOs use sleep flags - one for normal and one for suspend state.
* There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state.
*/
static int da9062_ldo_set_mode(struct regulator_dev *rdev, unsigned mode)
{
struct da9062_regulator *regl = rdev_get_drvdata(rdev);
unsigned val;
switch (mode) {
case REGULATOR_MODE_NORMAL:
val = 0;
break;
case REGULATOR_MODE_STANDBY:
val = 1;
break;
default:
return -EINVAL;
}
return regmap_field_write(regl->sleep, val);
}
static unsigned da9062_ldo_get_mode(struct regulator_dev *rdev)
{
struct da9062_regulator *regl = rdev_get_drvdata(rdev);
struct regmap_field *field;
int ret, val;
/* Detect current regulator state */
ret = regmap_field_read(regl->suspend, &val);
if (ret < 0)
return 0;
/* Read regulator mode from proper register, depending on state */
if (val)
field = regl->suspend_sleep;
else
field = regl->sleep;
ret = regmap_field_read(field, &val);
if (ret < 0)
return 0;
if (val)
return REGULATOR_MODE_STANDBY;
else
return REGULATOR_MODE_NORMAL;
}
static int da9062_buck_get_status(struct regulator_dev *rdev)
{
int ret = regulator_is_enabled_regmap(rdev);
if (ret == 0) {
ret = REGULATOR_STATUS_OFF;
} else if (ret > 0) {
ret = da9062_buck_get_mode(rdev);
if (ret > 0)
ret = regulator_mode_to_status(ret);
else if (ret == 0)
ret = -EIO;
}
return ret;
}
static int da9062_ldo_get_status(struct regulator_dev *rdev)
{
int ret = regulator_is_enabled_regmap(rdev);
if (ret == 0) {
ret = REGULATOR_STATUS_OFF;
} else if (ret > 0) {
ret = da9062_ldo_get_mode(rdev);
if (ret > 0)
ret = regulator_mode_to_status(ret);
else if (ret == 0)
ret = -EIO;
}
return ret;
}
static int da9062_set_suspend_voltage(struct regulator_dev *rdev, int uv)
{
struct da9062_regulator *regl = rdev_get_drvdata(rdev);
const struct da9062_regulator_info *rinfo = regl->info;
int ret, sel;
sel = regulator_map_voltage_linear(rdev, uv, uv);
if (sel < 0)
return sel;
sel <<= ffs(rdev->desc->vsel_mask) - 1;
ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg,
rdev->desc->vsel_mask, sel);
return ret;
}
static int da9062_suspend_enable(struct regulator_dev *rdev)
{
struct da9062_regulator *regl = rdev_get_drvdata(rdev);
return regmap_field_write(regl->suspend, 1);
}
static int da9062_suspend_disable(struct regulator_dev *rdev)
{
struct da9062_regulator *regl = rdev_get_drvdata(rdev);
return regmap_field_write(regl->suspend, 0);
}
static int da9062_buck_set_suspend_mode(struct regulator_dev *rdev,
unsigned mode)
{
struct da9062_regulator *regl = rdev_get_drvdata(rdev);
int val;
switch (mode) {
case REGULATOR_MODE_FAST:
val = BUCK_MODE_SYNC;
break;
case REGULATOR_MODE_NORMAL:
val = BUCK_MODE_AUTO;
break;
case REGULATOR_MODE_STANDBY:
val = BUCK_MODE_SLEEP;
break;
default:
return -EINVAL;
}
return regmap_field_write(regl->mode, val);
}
static int da9062_ldo_set_suspend_mode(struct regulator_dev *rdev,
unsigned mode)
{
struct da9062_regulator *regl = rdev_get_drvdata(rdev);
unsigned val;
switch (mode) {
case REGULATOR_MODE_NORMAL:
val = 0;
break;
case REGULATOR_MODE_STANDBY:
val = 1;
break;
default:
return -EINVAL;
}
return regmap_field_write(regl->suspend_sleep, val);
}
static const struct regulator_ops da9062_buck_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear,
.set_current_limit = da9062_set_current_limit,
.get_current_limit = da9062_get_current_limit,
.set_mode = da9062_buck_set_mode,
.get_mode = da9062_buck_get_mode,
.get_status = da9062_buck_get_status,
.set_suspend_voltage = da9062_set_suspend_voltage,
.set_suspend_enable = da9062_suspend_enable,
.set_suspend_disable = da9062_suspend_disable,
.set_suspend_mode = da9062_buck_set_suspend_mode,
};
static const struct regulator_ops da9062_ldo_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear,
.set_mode = da9062_ldo_set_mode,
.get_mode = da9062_ldo_get_mode,
.get_status = da9062_ldo_get_status,
.set_suspend_voltage = da9062_set_suspend_voltage,
.set_suspend_enable = da9062_suspend_enable,
.set_suspend_disable = da9062_suspend_disable,
.set_suspend_mode = da9062_ldo_set_suspend_mode,
};
/* Regulator information */
static const struct da9062_regulator_info local_regulator_info[] = {
{
.desc.id = DA9062_ID_BUCK1,
.desc.name = "DA9062 BUCK1",
.desc.of_match = of_match_ptr("buck1"),
.desc.regulators_node = of_match_ptr("regulators"),
.desc.ops = &da9062_buck_ops,
.desc.min_uV = (300) * 1000,
.desc.uV_step = (10) * 1000,
.desc.n_voltages = ((1570) - (300))/(10) + 1,
.current_limits = da9062_buck_a_limits,
.n_current_limits = ARRAY_SIZE(da9062_buck_a_limits),
.desc.enable_reg = DA9062AA_BUCK1_CONT,
.desc.enable_mask = DA9062AA_BUCK1_EN_MASK,
.desc.vsel_reg = DA9062AA_VBUCK1_A,
.desc.vsel_mask = DA9062AA_VBUCK1_A_MASK,
.desc.linear_min_sel = 0,
.sleep = REG_FIELD(DA9062AA_VBUCK1_A,
__builtin_ffs((int)DA9062AA_BUCK1_SL_A_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_BUCK1_SL_A_MASK)) - 1),
.suspend_sleep = REG_FIELD(DA9062AA_VBUCK1_B,
__builtin_ffs((int)DA9062AA_BUCK1_SL_B_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_BUCK1_SL_B_MASK)) - 1),
.suspend_vsel_reg = DA9062AA_VBUCK1_B,
.mode = REG_FIELD(DA9062AA_BUCK1_CFG,
__builtin_ffs((int)DA9062AA_BUCK1_MODE_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_BUCK1_MODE_MASK)) - 1),
.suspend = REG_FIELD(DA9062AA_DVC_1,
__builtin_ffs((int)DA9062AA_VBUCK1_SEL_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_VBUCK1_SEL_MASK)) - 1),
.ilimit = REG_FIELD(DA9062AA_BUCK_ILIM_C,
__builtin_ffs((int)DA9062AA_BUCK1_ILIM_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_BUCK1_ILIM_MASK)) - 1),
},
{
.desc.id = DA9062_ID_BUCK2,
.desc.name = "DA9062 BUCK2",
.desc.of_match = of_match_ptr("buck2"),
.desc.regulators_node = of_match_ptr("regulators"),
.desc.ops = &da9062_buck_ops,
.desc.min_uV = (300) * 1000,
.desc.uV_step = (10) * 1000,
.desc.n_voltages = ((1570) - (300))/(10) + 1,
.current_limits = da9062_buck_a_limits,
.n_current_limits = ARRAY_SIZE(da9062_buck_a_limits),
.desc.enable_reg = DA9062AA_BUCK2_CONT,
.desc.enable_mask = DA9062AA_BUCK2_EN_MASK,
.desc.vsel_reg = DA9062AA_VBUCK2_A,
.desc.vsel_mask = DA9062AA_VBUCK2_A_MASK,
.desc.linear_min_sel = 0,
.sleep = REG_FIELD(DA9062AA_VBUCK2_A,
__builtin_ffs((int)DA9062AA_BUCK2_SL_A_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_BUCK2_SL_A_MASK)) - 1),
.suspend_sleep = REG_FIELD(DA9062AA_VBUCK2_B,
__builtin_ffs((int)DA9062AA_BUCK2_SL_B_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_BUCK2_SL_B_MASK)) - 1),
.suspend_vsel_reg = DA9062AA_VBUCK2_B,
.mode = REG_FIELD(DA9062AA_BUCK2_CFG,
__builtin_ffs((int)DA9062AA_BUCK2_MODE_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_BUCK2_MODE_MASK)) - 1),
.suspend = REG_FIELD(DA9062AA_DVC_1,
__builtin_ffs((int)DA9062AA_VBUCK2_SEL_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_VBUCK2_SEL_MASK)) - 1),
.ilimit = REG_FIELD(DA9062AA_BUCK_ILIM_C,
__builtin_ffs((int)DA9062AA_BUCK2_ILIM_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_BUCK2_ILIM_MASK)) - 1),
},
{
.desc.id = DA9062_ID_BUCK3,
.desc.name = "DA9062 BUCK3",
.desc.of_match = of_match_ptr("buck3"),
.desc.regulators_node = of_match_ptr("regulators"),
.desc.ops = &da9062_buck_ops,
.desc.min_uV = (800) * 1000,
.desc.uV_step = (20) * 1000,
.desc.n_voltages = ((3340) - (800))/(20) + 1,
.current_limits = da9062_buck_b_limits,
.n_current_limits = ARRAY_SIZE(da9062_buck_b_limits),
.desc.enable_reg = DA9062AA_BUCK3_CONT,
.desc.enable_mask = DA9062AA_BUCK3_EN_MASK,
.desc.vsel_reg = DA9062AA_VBUCK3_A,
.desc.vsel_mask = DA9062AA_VBUCK3_A_MASK,
.desc.linear_min_sel = 0,
.sleep = REG_FIELD(DA9062AA_VBUCK3_A,
__builtin_ffs((int)DA9062AA_BUCK3_SL_A_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_BUCK3_SL_A_MASK)) - 1),
.suspend_sleep = REG_FIELD(DA9062AA_VBUCK3_B,
__builtin_ffs((int)DA9062AA_BUCK3_SL_B_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_BUCK3_SL_B_MASK)) - 1),
.suspend_vsel_reg = DA9062AA_VBUCK3_B,
.mode = REG_FIELD(DA9062AA_BUCK3_CFG,
__builtin_ffs((int)DA9062AA_BUCK3_MODE_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_BUCK3_MODE_MASK)) - 1),
.suspend = REG_FIELD(DA9062AA_DVC_1,
__builtin_ffs((int)DA9062AA_VBUCK3_SEL_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_VBUCK3_SEL_MASK)) - 1),
.ilimit = REG_FIELD(DA9062AA_BUCK_ILIM_A,
__builtin_ffs((int)DA9062AA_BUCK3_ILIM_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_BUCK3_ILIM_MASK)) - 1),
},
{
.desc.id = DA9062_ID_BUCK4,
.desc.name = "DA9062 BUCK4",
.desc.of_match = of_match_ptr("buck4"),
.desc.regulators_node = of_match_ptr("regulators"),
.desc.ops = &da9062_buck_ops,
.desc.min_uV = (530) * 1000,
.desc.uV_step = (10) * 1000,
.desc.n_voltages = ((1800) - (530))/(10) + 1,
.current_limits = da9062_buck_a_limits,
.n_current_limits = ARRAY_SIZE(da9062_buck_a_limits),
.desc.enable_reg = DA9062AA_BUCK4_CONT,
.desc.enable_mask = DA9062AA_BUCK4_EN_MASK,
.desc.vsel_reg = DA9062AA_VBUCK4_A,
.desc.vsel_mask = DA9062AA_VBUCK4_A_MASK,
.desc.linear_min_sel = 0,
.sleep = REG_FIELD(DA9062AA_VBUCK4_A,
__builtin_ffs((int)DA9062AA_BUCK4_SL_A_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_BUCK4_SL_A_MASK)) - 1),
.suspend_sleep = REG_FIELD(DA9062AA_VBUCK4_B,
__builtin_ffs((int)DA9062AA_BUCK4_SL_B_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_BUCK4_SL_B_MASK)) - 1),
.suspend_vsel_reg = DA9062AA_VBUCK4_B,
.mode = REG_FIELD(DA9062AA_BUCK4_CFG,
__builtin_ffs((int)DA9062AA_BUCK4_MODE_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_BUCK4_MODE_MASK)) - 1),
.suspend = REG_FIELD(DA9062AA_DVC_1,
__builtin_ffs((int)DA9062AA_VBUCK4_SEL_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_VBUCK4_SEL_MASK)) - 1),
.ilimit = REG_FIELD(DA9062AA_BUCK_ILIM_B,
__builtin_ffs((int)DA9062AA_BUCK4_ILIM_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_BUCK4_ILIM_MASK)) - 1),
},
{
.desc.id = DA9062_ID_LDO1,
.desc.name = "DA9062 LDO1",
.desc.of_match = of_match_ptr("ldo1"),
.desc.regulators_node = of_match_ptr("regulators"),
.desc.ops = &da9062_ldo_ops,
.desc.min_uV = (900) * 1000,
.desc.uV_step = (50) * 1000,
.desc.n_voltages = ((3600) - (900))/(50) + 1,
.desc.enable_reg = DA9062AA_LDO1_CONT,
.desc.enable_mask = DA9062AA_LDO1_EN_MASK,
.desc.vsel_reg = DA9062AA_VLDO1_A,
.desc.vsel_mask = DA9062AA_VLDO1_A_MASK,
.desc.linear_min_sel = 0,
.sleep = REG_FIELD(DA9062AA_VLDO1_A,
__builtin_ffs((int)DA9062AA_LDO1_SL_A_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_LDO1_SL_A_MASK)) - 1),
.suspend_sleep = REG_FIELD(DA9062AA_VLDO1_B,
__builtin_ffs((int)DA9062AA_LDO1_SL_B_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_LDO1_SL_B_MASK)) - 1),
.suspend_vsel_reg = DA9062AA_VLDO1_B,
.suspend = REG_FIELD(DA9062AA_DVC_1,
__builtin_ffs((int)DA9062AA_VLDO1_SEL_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_VLDO1_SEL_MASK)) - 1),
.oc_event = REG_FIELD(DA9062AA_STATUS_D,
__builtin_ffs((int)DA9062AA_LDO1_ILIM_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_LDO1_ILIM_MASK)) - 1),
},
{
.desc.id = DA9062_ID_LDO2,
.desc.name = "DA9062 LDO2",
.desc.of_match = of_match_ptr("ldo2"),
.desc.regulators_node = of_match_ptr("regulators"),
.desc.ops = &da9062_ldo_ops,
.desc.min_uV = (900) * 1000,
.desc.uV_step = (50) * 1000,
.desc.n_voltages = ((3600) - (600))/(50) + 1,
.desc.enable_reg = DA9062AA_LDO2_CONT,
.desc.enable_mask = DA9062AA_LDO2_EN_MASK,
.desc.vsel_reg = DA9062AA_VLDO2_A,
.desc.vsel_mask = DA9062AA_VLDO2_A_MASK,
.desc.linear_min_sel = 0,
.sleep = REG_FIELD(DA9062AA_VLDO2_A,
__builtin_ffs((int)DA9062AA_LDO2_SL_A_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_LDO2_SL_A_MASK)) - 1),
.suspend_sleep = REG_FIELD(DA9062AA_VLDO2_B,
__builtin_ffs((int)DA9062AA_LDO2_SL_B_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_LDO2_SL_B_MASK)) - 1),
.suspend_vsel_reg = DA9062AA_VLDO2_B,
.suspend = REG_FIELD(DA9062AA_DVC_1,
__builtin_ffs((int)DA9062AA_VLDO2_SEL_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_VLDO2_SEL_MASK)) - 1),
.oc_event = REG_FIELD(DA9062AA_STATUS_D,
__builtin_ffs((int)DA9062AA_LDO2_ILIM_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_LDO2_ILIM_MASK)) - 1),
},
{
.desc.id = DA9062_ID_LDO3,
.desc.name = "DA9062 LDO3",
.desc.of_match = of_match_ptr("ldo3"),
.desc.regulators_node = of_match_ptr("regulators"),
.desc.ops = &da9062_ldo_ops,
.desc.min_uV = (900) * 1000,
.desc.uV_step = (50) * 1000,
.desc.n_voltages = ((3600) - (900))/(50) + 1,
.desc.enable_reg = DA9062AA_LDO3_CONT,
.desc.enable_mask = DA9062AA_LDO3_EN_MASK,
.desc.vsel_reg = DA9062AA_VLDO3_A,
.desc.vsel_mask = DA9062AA_VLDO3_A_MASK,
.desc.linear_min_sel = 0,
.sleep = REG_FIELD(DA9062AA_VLDO3_A,
__builtin_ffs((int)DA9062AA_LDO3_SL_A_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_LDO3_SL_A_MASK)) - 1),
.suspend_sleep = REG_FIELD(DA9062AA_VLDO3_B,
__builtin_ffs((int)DA9062AA_LDO3_SL_B_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_LDO3_SL_B_MASK)) - 1),
.suspend_vsel_reg = DA9062AA_VLDO3_B,
.suspend = REG_FIELD(DA9062AA_DVC_1,
__builtin_ffs((int)DA9062AA_VLDO3_SEL_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_VLDO3_SEL_MASK)) - 1),
.oc_event = REG_FIELD(DA9062AA_STATUS_D,
__builtin_ffs((int)DA9062AA_LDO3_ILIM_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_LDO3_ILIM_MASK)) - 1),
},
{
.desc.id = DA9062_ID_LDO4,
.desc.name = "DA9062 LDO4",
.desc.of_match = of_match_ptr("ldo4"),
.desc.regulators_node = of_match_ptr("regulators"),
.desc.ops = &da9062_ldo_ops,
.desc.min_uV = (900) * 1000,
.desc.uV_step = (50) * 1000,
.desc.n_voltages = ((3600) - (900))/(50) + 1,
.desc.enable_reg = DA9062AA_LDO4_CONT,
.desc.enable_mask = DA9062AA_LDO4_EN_MASK,
.desc.vsel_reg = DA9062AA_VLDO4_A,
.desc.vsel_mask = DA9062AA_VLDO4_A_MASK,
.desc.linear_min_sel = 0,
.sleep = REG_FIELD(DA9062AA_VLDO4_A,
__builtin_ffs((int)DA9062AA_LDO4_SL_A_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_LDO4_SL_A_MASK)) - 1),
.suspend_sleep = REG_FIELD(DA9062AA_VLDO4_B,
__builtin_ffs((int)DA9062AA_LDO4_SL_B_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_LDO4_SL_B_MASK)) - 1),
.suspend_vsel_reg = DA9062AA_VLDO4_B,
.suspend = REG_FIELD(DA9062AA_DVC_1,
__builtin_ffs((int)DA9062AA_VLDO4_SEL_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_VLDO4_SEL_MASK)) - 1),
.oc_event = REG_FIELD(DA9062AA_STATUS_D,
__builtin_ffs((int)DA9062AA_LDO4_ILIM_MASK) - 1,
sizeof(unsigned int) * 8 -
__builtin_clz((DA9062AA_LDO4_ILIM_MASK)) - 1),
},
};
/* Regulator interrupt handlers */
static irqreturn_t da9062_ldo_lim_event(int irq, void *data)
{
struct da9062_regulators *regulators = data;
struct da9062 *hw = regulators->regulator[0].hw;
struct da9062_regulator *regl;
int handled = IRQ_NONE;
int bits, i, ret;
ret = regmap_read(hw->regmap, DA9062AA_STATUS_D, &bits);
if (ret < 0) {
dev_err(hw->dev,
"Failed to read LDO overcurrent indicator\n");
goto ldo_lim_error;
}
for (i = regulators->n_regulators - 1; i >= 0; i--) {
regl = &regulators->regulator[i];
if (regl->info->oc_event.reg != DA9062AA_STATUS_D)
continue;
if (BIT(regl->info->oc_event.lsb) & bits) {
regulator_notifier_call_chain(regl->rdev,
REGULATOR_EVENT_OVER_CURRENT, NULL);
handled = IRQ_HANDLED;
}
}
ldo_lim_error:
return handled;
}
static int da9062_regulator_probe(struct platform_device *pdev)
{
struct da9062 *chip = dev_get_drvdata(pdev->dev.parent);
struct da9062_regulators *regulators;
struct da9062_regulator *regl;
struct regulator_config config = { };
int irq, n, ret;
size_t size;
/* Allocate memory required by usable regulators */
size = sizeof(struct da9062_regulators) +
DA9062_MAX_REGULATORS * sizeof(struct da9062_regulator);
regulators = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
if (!regulators)
return -ENOMEM;
regulators->n_regulators = DA9062_MAX_REGULATORS;
platform_set_drvdata(pdev, regulators);
n = 0;
while (n < regulators->n_regulators) {
/* Initialise regulator structure */
regl = &regulators->regulator[n];
regl->hw = chip;
regl->info = &local_regulator_info[n];
regl->desc = regl->info->desc;
regl->desc.type = REGULATOR_VOLTAGE;
regl->desc.owner = THIS_MODULE;
if (regl->info->mode.reg)
regl->mode = devm_regmap_field_alloc(
&pdev->dev,
chip->regmap,
regl->info->mode);
if (regl->info->suspend.reg)
regl->suspend = devm_regmap_field_alloc(
&pdev->dev,
chip->regmap,
regl->info->suspend);
if (regl->info->sleep.reg)
regl->sleep = devm_regmap_field_alloc(
&pdev->dev,
chip->regmap,
regl->info->sleep);
if (regl->info->suspend_sleep.reg)
regl->suspend_sleep = devm_regmap_field_alloc(
&pdev->dev,
chip->regmap,
regl->info->suspend_sleep);
if (regl->info->ilimit.reg)
regl->ilimit = devm_regmap_field_alloc(
&pdev->dev,
chip->regmap,
regl->info->ilimit);
/* Register regulator */
memset(&config, 0, sizeof(config));
config.dev = chip->dev;
config.driver_data = regl;
config.regmap = chip->regmap;
regl->rdev = devm_regulator_register(&pdev->dev, &regl->desc,
&config);
if (IS_ERR(regl->rdev)) {
dev_err(&pdev->dev,
"Failed to register %s regulator\n",
regl->desc.name);
return PTR_ERR(regl->rdev);
}
n++;
}
/* LDOs overcurrent event support */
irq = platform_get_irq_byname(pdev, "LDO_LIM");
if (irq < 0) {
dev_err(&pdev->dev, "Failed to get IRQ.\n");
return irq;
}
regulators->irq_ldo_lim = irq;
ret = devm_request_threaded_irq(&pdev->dev, irq,
NULL, da9062_ldo_lim_event,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
"LDO_LIM", regulators);
if (ret) {
dev_warn(&pdev->dev,
"Failed to request LDO_LIM IRQ.\n");
regulators->irq_ldo_lim = -ENXIO;
}
return 0;
}
static struct platform_driver da9062_regulator_driver = {
.driver = {
.name = "da9062-regulators",
},
.probe = da9062_regulator_probe,
};
static int __init da9062_regulator_init(void)
{
return platform_driver_register(&da9062_regulator_driver);
}
subsys_initcall(da9062_regulator_init);
static void __exit da9062_regulator_cleanup(void)
{
platform_driver_unregister(&da9062_regulator_driver);
}
module_exit(da9062_regulator_cleanup);
/* Module information */
MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>");
MODULE_DESCRIPTION("REGULATOR device driver for Dialog DA9062");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:da9062-regulators");
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