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regulator: da9121: Add device variant regmaps

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Add ability to probe device and validate configuration, then apply a regmap
configuration for a single or dual buck device accordingly.

Signed-off-by: Adam Ward <Adam.Ward.opensource@diasemi.com>
Link: https://lore.kernel.org/r/068c6b8d5e1b4e221e899e4c914c429429a2ec7d.1606755367.git.Adam.Ward.opensource@diasemi.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Adam Ward 2020-11-30 16:59:08 +00:00 committed by Mark Brown
parent f3fbd5566f
commit c860476b9e
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
3 changed files with 262 additions and 21 deletions
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14
drivers/regulator/Kconfig
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@ -313,13 +313,21 @@ config REGULATOR_DA9063
will be called da9063-regulator.
config REGULATOR_DA9121
tristate "Dialog Semiconductor DA9121 regulator"
tristate "Dialog Semiconductor DA9121/DA9122/DA9220/DA9217/DA9130/DA9131/DA9132 regulator"
depends on I2C && OF
select REGMAP_I2C
help
Say y here to support for the Dialog Semiconductor DA9121. The
DA9210 is a dual-phase buck converter controlled through an I2C
interface.
DA9121 is a single channel dual-phase buck converter controlled
through an I2C interface.
DA9121 Single-channel dual-phase 10A buck converter
DA9130 Single-channel dual-phase 10A buck converter (Automotive)
DA9217 Single-channel dual-phase 6A buck converter
DA9122 Dual-channel single-phase 5A buck converter
DA9131 Dual-channel single-phase 5A buck converter (Automotive)
DA9220 Dual-channel single-phase 3A buck converter
DA9132 Dual-channel single-phase 3A buck converter (Automotive)
This driver can also be built as a module. If so, the module
will be called da9121-regulator.

244
drivers/regulator/da9121-regulator.c
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@ -1,5 +1,17 @@
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (C) 2020 Axis Communications AB */
//
// DA9121 Single-channel dual-phase 10A buck converter
//
// Copyright (C) 2020 Axis Communications AB
//
// DA9130 Single-channel dual-phase 10A buck converter (Automotive)
// DA9217 Single-channel dual-phase 6A buck converter
// DA9122 Dual-channel single-phase 5A buck converter
// DA9131 Dual-channel single-phase 5A buck converter (Automotive)
// DA9220 Dual-channel single-phase 3A buck converter
// DA9132 Dual-channel single-phase 3A buck converter (Automotive)
//
// Copyright (C) 2020 Dialog Semiconductor
#include <linux/of_device.h>
#include <linux/regulator/of_regulator.h>
@ -9,26 +21,17 @@
#include <linux/regmap.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/regulator/da9121.h>
#include "da9121-regulator.h"
/* Chip data */
struct da9121 {
struct device *dev;
struct regmap *regmap;
int variant_id;
};
#define DA9121_MIN_MV 300
#define DA9121_MAX_MV 1900
#define DA9121_STEP_MV 10
#define DA9121_MIN_SEL (DA9121_MIN_MV / DA9121_STEP_MV)
#define DA9121_N_VOLTAGES (((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \
+ 1 + DA9121_MIN_SEL)
static const struct regmap_config da9121_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static const struct regulator_ops da9121_buck_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
@ -38,6 +41,13 @@ static const struct regulator_ops da9121_buck_ops = {
.list_voltage = regulator_list_voltage_linear,
};
#define DA9121_MIN_MV 300
#define DA9121_MAX_MV 1900
#define DA9121_STEP_MV 10
#define DA9121_MIN_SEL (DA9121_MIN_MV / DA9121_STEP_MV)
#define DA9121_N_VOLTAGES (((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \
+ 1 + DA9121_MIN_SEL)
static const struct regulator_desc da9121_reg = {
.name = "da9121",
.of_match = "buck1",
@ -58,6 +68,205 @@ static const struct regulator_desc da9121_reg = {
.enable_time = 20,
};
/* DA9121 chip register model */
static const struct regmap_range da9121_1ch_readable_ranges[] = {
regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
};
static const struct regmap_access_table da9121_1ch_readable_table = {
.yes_ranges = da9121_1ch_readable_ranges,
.n_yes_ranges = ARRAY_SIZE(da9121_1ch_readable_ranges),
};
static const struct regmap_range da9121_2ch_readable_ranges[] = {
regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_7),
regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_7),
regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
};
static const struct regmap_access_table da9121_2ch_readable_table = {
.yes_ranges = da9121_2ch_readable_ranges,
.n_yes_ranges = ARRAY_SIZE(da9121_2ch_readable_ranges),
};
static const struct regmap_range da9121_1ch_writeable_ranges[] = {
regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_6),
};
static const struct regmap_access_table da9121_1ch_writeable_table = {
.yes_ranges = da9121_1ch_writeable_ranges,
.n_yes_ranges = ARRAY_SIZE(da9121_1ch_writeable_ranges),
};
static const struct regmap_range da9121_2ch_writeable_ranges[] = {
regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_7),
regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_2),
regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_4, DA9xxx_REG_BUCK_BUCK2_7),
};
static const struct regmap_access_table da9121_2ch_writeable_table = {
.yes_ranges = da9121_2ch_writeable_ranges,
.n_yes_ranges = ARRAY_SIZE(da9121_2ch_writeable_ranges),
};
static const struct regmap_range da9121_volatile_ranges[] = {
regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_EVENT_2),
regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
};
static const struct regmap_access_table da9121_volatile_table = {
.yes_ranges = da9121_volatile_ranges,
.n_yes_ranges = ARRAY_SIZE(da9121_volatile_ranges),
};
/* DA9121 regmap config for 1 channel variants */
static struct regmap_config da9121_1ch_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = DA9121_REG_OTP_CONFIG_ID,
.rd_table = &da9121_1ch_readable_table,
.wr_table = &da9121_1ch_writeable_table,
.volatile_table = &da9121_volatile_table,
.cache_type = REGCACHE_RBTREE,
};
/* DA9121 regmap config for 2 channel variants */
static struct regmap_config da9121_2ch_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = DA9121_REG_OTP_CONFIG_ID,
.rd_table = &da9121_2ch_readable_table,
.wr_table = &da9121_2ch_writeable_table,
.volatile_table = &da9121_volatile_table,
.cache_type = REGCACHE_RBTREE,
};
static int da9121_check_device_type(struct i2c_client *i2c, struct da9121 *chip)
{
u32 device_id;
u8 chip_id = chip->variant_id;
u32 variant_id;
u8 variant_mrc, variant_vrc;
char *type;
const char *name;
bool config_match = false;
int ret = 0;
ret = regmap_read(chip->regmap, DA9121_REG_OTP_DEVICE_ID, &device_id);
if (ret < 0) {
dev_err(chip->dev, "Cannot read device ID: %d\n", ret);
goto error;
}
ret = regmap_read(chip->regmap, DA9121_REG_OTP_VARIANT_ID, &variant_id);
if (ret < 0) {
dev_err(chip->dev, "Cannot read variant ID: %d\n", ret);
goto error;
}
if (device_id != DA9121_DEVICE_ID) {
dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id);
ret = -ENODEV;
goto error;
}
variant_vrc = variant_id & DA9121_MASK_OTP_VARIANT_ID_VRC;
switch (variant_vrc) {
case DA9121_VARIANT_VRC:
type = "DA9121/DA9130";
config_match = (chip_id == DA9121_TYPE_DA9121_DA9130);
break;
case DA9220_VARIANT_VRC:
type = "DA9220/DA9132";
config_match = (chip_id == DA9121_TYPE_DA9220_DA9132);
break;
case DA9122_VARIANT_VRC:
type = "DA9122/DA9131";
config_match = (chip_id == DA9121_TYPE_DA9122_DA9131);
break;
case DA9217_VARIANT_VRC:
type = "DA9217";
config_match = (chip_id == DA9121_TYPE_DA9217);
break;
default:
type = "Unknown";
break;
}
dev_info(chip->dev,
"Device detected (device-ID: 0x%02X, var-ID: 0x%02X, %s)\n",
device_id, variant_id, type);
if (!config_match) {
dev_err(chip->dev, "Device tree configuration '%s' does not match detected device.\n", name);
ret = -EINVAL;
goto error;
}
variant_mrc = (variant_id & DA9121_MASK_OTP_VARIANT_ID_MRC)
>> DA9121_SHIFT_OTP_VARIANT_ID_MRC;
if ((device_id == DA9121_DEVICE_ID) &&
(variant_mrc < DA9121_VARIANT_MRC_BASE)) {
dev_err(chip->dev,
"Cannot support variant MRC: 0x%02X\n", variant_mrc);
ret = -EINVAL;
}
error:
return ret;
}
static int da9121_assign_chip_model(struct i2c_client *i2c,
struct da9121 *chip)
{
struct regmap_config *regmap;
int ret = 0;
chip->dev = &i2c->dev;
switch (chip->variant_id) {
case DA9121_TYPE_DA9121_DA9130:
fallthrough;
case DA9121_TYPE_DA9217:
regmap = &da9121_1ch_regmap_config;
break;
case DA9121_TYPE_DA9122_DA9131:
fallthrough;
case DA9121_TYPE_DA9220_DA9132:
regmap = &da9121_2ch_regmap_config;
break;
}
chip->regmap = devm_regmap_init_i2c(i2c, regmap);
if (IS_ERR(chip->regmap)) {
ret = PTR_ERR(chip->regmap);
dev_err(chip->dev, "Failed to configure a register map: %d\n",
ret);
}
ret = da9121_check_device_type(i2c, chip);
return ret;
}
static const struct of_device_id da9121_dt_ids[] = {
{ .compatible = "dlg,da9121", .data = (void *) DA9121_TYPE_DA9121_DA9130 },
{ .compatible = "dlg,da9130", .data = (void *) DA9121_TYPE_DA9121_DA9130 },
@ -89,7 +298,6 @@ static int da9121_i2c_probe(struct i2c_client *i2c,
struct device *dev = &i2c->dev;
struct regulator_config config = {};
struct regulator_dev *rdev;
struct regmap *regmap;
chip = devm_kzalloc(&i2c->dev, sizeof(struct da9121), GFP_KERNEL);
if (!chip) {
@ -99,13 +307,13 @@ static int da9121_i2c_probe(struct i2c_client *i2c,
chip->variant_id = da9121_of_get_id(&i2c->dev);
regmap = devm_regmap_init_i2c(i2c, &da9121_regmap_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
ret = da9121_assign_chip_model(i2c, chip);
if (ret < 0)
goto error;
config.dev = &i2c->dev;
config.of_node = dev->of_node;
config.regmap = regmap;
config.regmap = chip->regmap;
rdev = devm_regulator_register(&i2c->dev, &da9121_reg, &config);
if (IS_ERR(rdev)) {

25
include/linux/regulator/da9121.h Normal file
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@ -0,0 +1,25 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* DA9121 Single-channel dual-phase 10A buck converter
* DA9130 Single-channel dual-phase 10A buck converter (Automotive)
* DA9217 Single-channel dual-phase 6A buck converter
* DA9122 Dual-channel single-phase 5A buck converter
* DA9131 Dual-channel single-phase 5A buck converter (Automotive)
* DA9220 Dual-channel single-phase 3A buck converter
* DA9132 Dual-channel single-phase 3A buck converter (Automotive)
*
* Copyright (C) 2020 Dialog Semiconductor
*
* Authors: Adam Ward, Dialog Semiconductor
*/
#ifndef __LINUX_REGULATOR_DA9121_H
#define __LINUX_REGULATOR_DA9121_H
enum {
DA9121_IDX_BUCK1,
DA9121_IDX_BUCK2,
DA9121_IDX_MAX
};
#endif