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regulator: da9121: Add device variant regmaps
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
Mark Brown
parent
f3fbd5566f
commit
c860476b9e
3 changed files with 262 additions and 21 deletions
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@ -313,13 +313,21 @@ config REGULATOR_DA9063
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will be called da9063-regulator.
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config REGULATOR_DA9121
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tristate "Dialog Semiconductor DA9121 regulator"
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tristate "Dialog Semiconductor DA9121/DA9122/DA9220/DA9217/DA9130/DA9131/DA9132 regulator"
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depends on I2C && OF
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select REGMAP_I2C
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help
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Say y here to support for the Dialog Semiconductor DA9121. The
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DA9210 is a dual-phase buck converter controlled through an I2C
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interface.
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DA9121 is a single channel dual-phase buck converter controlled
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through an I2C interface.
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DA9121 Single-channel dual-phase 10A buck converter
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DA9130 Single-channel dual-phase 10A buck converter (Automotive)
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DA9217 Single-channel dual-phase 6A buck converter
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DA9122 Dual-channel single-phase 5A buck converter
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DA9131 Dual-channel single-phase 5A buck converter (Automotive)
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DA9220 Dual-channel single-phase 3A buck converter
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DA9132 Dual-channel single-phase 3A buck converter (Automotive)
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This driver can also be built as a module. If so, the module
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will be called da9121-regulator.
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@ -1,5 +1,17 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright (C) 2020 Axis Communications AB */
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//
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// DA9121 Single-channel dual-phase 10A buck converter
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//
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// Copyright (C) 2020 Axis Communications AB
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//
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// DA9130 Single-channel dual-phase 10A buck converter (Automotive)
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// DA9217 Single-channel dual-phase 6A buck converter
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// DA9122 Dual-channel single-phase 5A buck converter
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// DA9131 Dual-channel single-phase 5A buck converter (Automotive)
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// DA9220 Dual-channel single-phase 3A buck converter
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// DA9132 Dual-channel single-phase 3A buck converter (Automotive)
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//
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// Copyright (C) 2020 Dialog Semiconductor
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#include <linux/of_device.h>
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#include <linux/regulator/of_regulator.h>
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@ -9,26 +21,17 @@
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#include <linux/regmap.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/regulator/da9121.h>
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#include "da9121-regulator.h"
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/* Chip data */
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struct da9121 {
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struct device *dev;
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struct regmap *regmap;
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int variant_id;
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};
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#define DA9121_MIN_MV 300
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#define DA9121_MAX_MV 1900
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#define DA9121_STEP_MV 10
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#define DA9121_MIN_SEL (DA9121_MIN_MV / DA9121_STEP_MV)
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#define DA9121_N_VOLTAGES (((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \
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+ 1 + DA9121_MIN_SEL)
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static const struct regmap_config da9121_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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static const struct regulator_ops da9121_buck_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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@ -38,6 +41,13 @@ static const struct regulator_ops da9121_buck_ops = {
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.list_voltage = regulator_list_voltage_linear,
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};
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#define DA9121_MIN_MV 300
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#define DA9121_MAX_MV 1900
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#define DA9121_STEP_MV 10
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#define DA9121_MIN_SEL (DA9121_MIN_MV / DA9121_STEP_MV)
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#define DA9121_N_VOLTAGES (((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \
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+ 1 + DA9121_MIN_SEL)
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static const struct regulator_desc da9121_reg = {
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.name = "da9121",
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.of_match = "buck1",
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@ -58,6 +68,205 @@ static const struct regulator_desc da9121_reg = {
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.enable_time = 20,
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};
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/* DA9121 chip register model */
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static const struct regmap_range da9121_1ch_readable_ranges[] = {
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regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
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regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
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regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
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regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
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regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
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};
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static const struct regmap_access_table da9121_1ch_readable_table = {
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.yes_ranges = da9121_1ch_readable_ranges,
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.n_yes_ranges = ARRAY_SIZE(da9121_1ch_readable_ranges),
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};
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static const struct regmap_range da9121_2ch_readable_ranges[] = {
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regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
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regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
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regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
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regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_7),
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regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_7),
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regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
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};
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static const struct regmap_access_table da9121_2ch_readable_table = {
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.yes_ranges = da9121_2ch_readable_ranges,
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.n_yes_ranges = ARRAY_SIZE(da9121_2ch_readable_ranges),
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};
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static const struct regmap_range da9121_1ch_writeable_ranges[] = {
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regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
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regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
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regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
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regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
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regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_6),
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};
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static const struct regmap_access_table da9121_1ch_writeable_table = {
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.yes_ranges = da9121_1ch_writeable_ranges,
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.n_yes_ranges = ARRAY_SIZE(da9121_1ch_writeable_ranges),
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};
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static const struct regmap_range da9121_2ch_writeable_ranges[] = {
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regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
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regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
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regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
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regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
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regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_7),
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regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_2),
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regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_4, DA9xxx_REG_BUCK_BUCK2_7),
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};
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static const struct regmap_access_table da9121_2ch_writeable_table = {
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.yes_ranges = da9121_2ch_writeable_ranges,
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.n_yes_ranges = ARRAY_SIZE(da9121_2ch_writeable_ranges),
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};
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static const struct regmap_range da9121_volatile_ranges[] = {
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regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_EVENT_2),
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regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
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regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
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};
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static const struct regmap_access_table da9121_volatile_table = {
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.yes_ranges = da9121_volatile_ranges,
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.n_yes_ranges = ARRAY_SIZE(da9121_volatile_ranges),
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};
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/* DA9121 regmap config for 1 channel variants */
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static struct regmap_config da9121_1ch_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = DA9121_REG_OTP_CONFIG_ID,
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.rd_table = &da9121_1ch_readable_table,
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.wr_table = &da9121_1ch_writeable_table,
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.volatile_table = &da9121_volatile_table,
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.cache_type = REGCACHE_RBTREE,
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};
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/* DA9121 regmap config for 2 channel variants */
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static struct regmap_config da9121_2ch_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = DA9121_REG_OTP_CONFIG_ID,
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.rd_table = &da9121_2ch_readable_table,
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.wr_table = &da9121_2ch_writeable_table,
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.volatile_table = &da9121_volatile_table,
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.cache_type = REGCACHE_RBTREE,
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};
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static int da9121_check_device_type(struct i2c_client *i2c, struct da9121 *chip)
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{
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u32 device_id;
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u8 chip_id = chip->variant_id;
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u32 variant_id;
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u8 variant_mrc, variant_vrc;
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char *type;
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const char *name;
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bool config_match = false;
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int ret = 0;
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ret = regmap_read(chip->regmap, DA9121_REG_OTP_DEVICE_ID, &device_id);
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if (ret < 0) {
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dev_err(chip->dev, "Cannot read device ID: %d\n", ret);
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goto error;
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}
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ret = regmap_read(chip->regmap, DA9121_REG_OTP_VARIANT_ID, &variant_id);
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if (ret < 0) {
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dev_err(chip->dev, "Cannot read variant ID: %d\n", ret);
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goto error;
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}
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if (device_id != DA9121_DEVICE_ID) {
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dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id);
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ret = -ENODEV;
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goto error;
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}
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variant_vrc = variant_id & DA9121_MASK_OTP_VARIANT_ID_VRC;
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switch (variant_vrc) {
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case DA9121_VARIANT_VRC:
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type = "DA9121/DA9130";
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config_match = (chip_id == DA9121_TYPE_DA9121_DA9130);
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break;
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case DA9220_VARIANT_VRC:
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type = "DA9220/DA9132";
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config_match = (chip_id == DA9121_TYPE_DA9220_DA9132);
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break;
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case DA9122_VARIANT_VRC:
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type = "DA9122/DA9131";
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config_match = (chip_id == DA9121_TYPE_DA9122_DA9131);
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break;
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case DA9217_VARIANT_VRC:
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type = "DA9217";
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config_match = (chip_id == DA9121_TYPE_DA9217);
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break;
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default:
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type = "Unknown";
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break;
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}
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dev_info(chip->dev,
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"Device detected (device-ID: 0x%02X, var-ID: 0x%02X, %s)\n",
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device_id, variant_id, type);
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if (!config_match) {
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dev_err(chip->dev, "Device tree configuration '%s' does not match detected device.\n", name);
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ret = -EINVAL;
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goto error;
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}
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variant_mrc = (variant_id & DA9121_MASK_OTP_VARIANT_ID_MRC)
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>> DA9121_SHIFT_OTP_VARIANT_ID_MRC;
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if ((device_id == DA9121_DEVICE_ID) &&
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(variant_mrc < DA9121_VARIANT_MRC_BASE)) {
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dev_err(chip->dev,
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"Cannot support variant MRC: 0x%02X\n", variant_mrc);
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ret = -EINVAL;
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}
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error:
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return ret;
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}
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static int da9121_assign_chip_model(struct i2c_client *i2c,
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struct da9121 *chip)
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{
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struct regmap_config *regmap;
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int ret = 0;
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chip->dev = &i2c->dev;
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switch (chip->variant_id) {
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case DA9121_TYPE_DA9121_DA9130:
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fallthrough;
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case DA9121_TYPE_DA9217:
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regmap = &da9121_1ch_regmap_config;
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break;
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case DA9121_TYPE_DA9122_DA9131:
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fallthrough;
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case DA9121_TYPE_DA9220_DA9132:
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regmap = &da9121_2ch_regmap_config;
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break;
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}
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chip->regmap = devm_regmap_init_i2c(i2c, regmap);
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if (IS_ERR(chip->regmap)) {
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ret = PTR_ERR(chip->regmap);
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dev_err(chip->dev, "Failed to configure a register map: %d\n",
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ret);
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}
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ret = da9121_check_device_type(i2c, chip);
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return ret;
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}
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static const struct of_device_id da9121_dt_ids[] = {
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{ .compatible = "dlg,da9121", .data = (void *) DA9121_TYPE_DA9121_DA9130 },
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{ .compatible = "dlg,da9130", .data = (void *) DA9121_TYPE_DA9121_DA9130 },
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@ -89,7 +298,6 @@ static int da9121_i2c_probe(struct i2c_client *i2c,
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struct device *dev = &i2c->dev;
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struct regulator_config config = {};
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struct regulator_dev *rdev;
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struct regmap *regmap;
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chip = devm_kzalloc(&i2c->dev, sizeof(struct da9121), GFP_KERNEL);
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if (!chip) {
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@ -99,13 +307,13 @@ static int da9121_i2c_probe(struct i2c_client *i2c,
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chip->variant_id = da9121_of_get_id(&i2c->dev);
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regmap = devm_regmap_init_i2c(i2c, &da9121_regmap_config);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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ret = da9121_assign_chip_model(i2c, chip);
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if (ret < 0)
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goto error;
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config.dev = &i2c->dev;
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config.of_node = dev->of_node;
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config.regmap = regmap;
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config.regmap = chip->regmap;
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rdev = devm_regulator_register(&i2c->dev, &da9121_reg, &config);
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if (IS_ERR(rdev)) {
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25
include/linux/regulator/da9121.h
Normal file
25
include/linux/regulator/da9121.h
Normal file
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@ -0,0 +1,25 @@
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/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* DA9121 Single-channel dual-phase 10A buck converter
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* DA9130 Single-channel dual-phase 10A buck converter (Automotive)
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* DA9217 Single-channel dual-phase 6A buck converter
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* DA9122 Dual-channel single-phase 5A buck converter
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* DA9131 Dual-channel single-phase 5A buck converter (Automotive)
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* DA9220 Dual-channel single-phase 3A buck converter
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* DA9132 Dual-channel single-phase 3A buck converter (Automotive)
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*
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* Copyright (C) 2020 Dialog Semiconductor
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*
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* Authors: Adam Ward, Dialog Semiconductor
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*/
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#ifndef __LINUX_REGULATOR_DA9121_H
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#define __LINUX_REGULATOR_DA9121_H
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enum {
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DA9121_IDX_BUCK1,
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DA9121_IDX_BUCK2,
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DA9121_IDX_MAX
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};
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#endif
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