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author | Adam Ward <Adam.Ward.opensource@diasemi.com> | 2020-11-30 16:59:08 +0000 |
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committer | Mark Brown <broonie@kernel.org> | 2020-12-01 12:17:58 +0000 |
commit | c860476b9e3a420192b28e580cb749e024d032eb (patch) | |
tree | c04c147a5ec1ef2ae50b6de270f4fd93fa468f18 /drivers/regulator | |
parent | f3fbd5566f6a8cdb7c48ab29bd1096205b7fbcaf (diff) | |
download | linux-c860476b9e3a420192b28e580cb749e024d032eb.tar.gz linux-c860476b9e3a420192b28e580cb749e024d032eb.tar.bz2 linux-c860476b9e3a420192b28e580cb749e024d032eb.zip |
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>
Diffstat (limited to 'drivers/regulator')
-rw-r--r-- | drivers/regulator/Kconfig | 14 | ||||
-rw-r--r-- | drivers/regulator/da9121-regulator.c | 244 |
2 files changed, 237 insertions, 21 deletions
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index a497a3729091..7faedb05b7a6 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -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. diff --git a/drivers/regulator/da9121-regulator.c b/drivers/regulator/da9121-regulator.c index 5bebdb2a480d..137b1dfbcfbb 100644 --- a/drivers/regulator/da9121-regulator.c +++ b/drivers/regulator/da9121-regulator.c @@ -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)) { |