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X-OriginatorOrg: diasemi.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Nov 2020 12:14:54.6381 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b7faaaf9-7bde-40de-00ee-08d88d4de3eb X-MS-Exchange-CrossTenant-Id: 511e3c0e-ee96-486e-a2ec-e272ffa37b7c X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=511e3c0e-ee96-486e-a2ec-e272ffa37b7c;Ip=[193.240.239.45];Helo=[mailrelay1.diasemi.com] X-MS-Exchange-CrossTenant-AuthSource: AM5EUR02FT046.eop-EUR02.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR10MB3555 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- drivers/regulator/Kconfig | 14 +- drivers/regulator/da9121-regulator.c | 382 +++++++++++++++++++++++++++++++++-- include/linux/regulator/da9121.h | 25 +++ 3 files changed, 401 insertions(+), 20 deletions(-) create mode 100644 include/linux/regulator/da9121.h diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 005a603..68f1bbd 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -304,13 +304,21 @@ 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 5bebdb2..76932ba 100644 --- a/drivers/regulator/da9121-regulator.c +++ b/drivers/regulator/da9121-regulator.c @@ -9,26 +9,18 @@ #include #include #include +#include + #include "da9121-regulator.h" /* Chip data */ struct da9121 { struct device *dev; + struct regmap *regmap; + struct regulator_dev *rdev[DA9121_IDX_MAX]; 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, @@ -38,10 +30,24 @@ struct da9121 { .list_voltage = regulator_list_voltage_linear, }; +static struct of_regulator_match da9121_matches[] = { + [DA9121_IDX_BUCK1] = { .name = "buck1" }, + [DA9121_IDX_BUCK2] = { .name = "buck2" }, +}; + +#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 = { + .id = DA9121_IDX_BUCK1, .name = "da9121", .of_match = "buck1", .owner = THIS_MODULE, + .regulators_node = of_match_ptr("regulators"), .ops = &da9121_buck_ops, .type = REGULATOR_VOLTAGE, .n_voltages = DA9121_N_VOLTAGES, @@ -58,6 +64,349 @@ struct da9121 { .enable_time = 20, }; +static const struct regulator_desc da9220_reg[2] = { + { + .id = DA9121_IDX_BUCK1, + .name = "DA9220/DA9132 BUCK1", + .of_match = "buck1", + .owner = THIS_MODULE, + .regulators_node = of_match_ptr("regulators"), + .ops = &da9121_buck_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = DA9121_N_VOLTAGES, + .min_uV = DA9121_MIN_MV * 1000, + .uV_step = DA9121_STEP_MV * 1000, + .linear_min_sel = DA9121_MIN_SEL, + .enable_reg = DA9121_REG_BUCK_BUCK1_0, + .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, + .vsel_reg = DA9121_REG_BUCK_BUCK1_5, + .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, + }, + { + .id = DA9121_IDX_BUCK2, + .name = "DA9220/DA9132 BUCK2", + .of_match = "buck2", + .owner = THIS_MODULE, + .regulators_node = of_match_ptr("regulators"), + .ops = &da9121_buck_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = DA9121_N_VOLTAGES, + .min_uV = DA9121_MIN_MV * 1000, + .uV_step = DA9121_STEP_MV * 1000, + .linear_min_sel = DA9121_MIN_SEL, + .enable_reg = DA9xxx_REG_BUCK_BUCK2_0, + .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, + .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5, + .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, + } +}; + +static const struct regulator_desc da9122_reg[2] = { + { + .id = DA9121_IDX_BUCK1, + .name = "DA9122/DA9131 BUCK1", + .of_match = "buck1", + .owner = THIS_MODULE, + .regulators_node = of_match_ptr("regulators"), + .ops = &da9121_buck_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = DA9121_N_VOLTAGES, + .min_uV = DA9121_MIN_MV * 1000, + .uV_step = DA9121_STEP_MV * 1000, + .linear_min_sel = DA9121_MIN_SEL, + .enable_reg = DA9121_REG_BUCK_BUCK1_0, + .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, + .vsel_reg = DA9121_REG_BUCK_BUCK1_5, + .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, + }, + { + .id = DA9121_IDX_BUCK2, + .name = "DA9122/DA9131 BUCK2", + .of_match = "buck2", + .owner = THIS_MODULE, + .regulators_node = of_match_ptr("regulators"), + .ops = &da9121_buck_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = DA9121_N_VOLTAGES, + .min_uV = DA9121_MIN_MV * 1000, + .uV_step = DA9121_STEP_MV * 1000, + .linear_min_sel = DA9121_MIN_SEL, + .enable_reg = DA9xxx_REG_BUCK_BUCK2_0, + .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, + .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5, + .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, + } +}; + +static const struct regulator_desc da9217_reg = { + .id = DA9121_IDX_BUCK1, + .name = "DA9217 BUCK1", + .of_match = "buck1", + .owner = THIS_MODULE, + .regulators_node = of_match_ptr("regulators"), + .ops = &da9121_buck_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = DA9121_N_VOLTAGES, + .min_uV = DA9121_MIN_MV * 1000, + .uV_step = DA9121_STEP_MV * 1000, + .linear_min_sel = DA9121_MIN_SEL, + .enable_reg = DA9121_REG_BUCK_BUCK1_0, + .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, + .vsel_reg = DA9121_REG_BUCK_BUCK1_5, + .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, +}; + +static const struct regulator_desc *local_da9121_regulators[][DA9121_IDX_MAX] = { + [DA9121_TYPE_DA9121_DA9130] = { &da9121_reg, NULL }, + [DA9121_TYPE_DA9220_DA9132] = { &da9220_reg[0], &da9220_reg[1] }, + [DA9121_TYPE_DA9122_DA9131] = { &da9122_reg[0], &da9122_reg[1] }, + [DA9121_TYPE_DA9217] = { &da9217_reg, NULL }, +}; + +/* 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_i2c_reg_read(struct i2c_client *client, u8 addr, + u8 *buf, int count) +{ + struct i2c_msg xfer[2]; + int ret; + + xfer[0].addr = client->addr; + xfer[0].flags = 0; + xfer[0].len = 1; + xfer[0].buf = &addr; + + xfer[1].addr = client->addr; + xfer[1].flags = I2C_M_RD; + xfer[1].len = 1; + xfer[1].buf = buf; + + + ret = i2c_transfer(client->adapter, xfer, 2); + if (ret < 0) { + dev_err(&client->dev, "Device read failed: %d\n", ret); + return ret; + } + + if (ret != 2) { + dev_err(&client->dev, "Device read failed to complete\n"); + return -EIO; + } + + return 0; +} + +static int da9121_get_device_type(struct i2c_client *i2c, struct da9121 *chip) +{ + u8 device_id; + u8 chip_id = chip->variant_id; + u8 variant_id; + u8 variant_mrc, variant_vrc; + char *type; + const char *name; + bool config_match = false; + int ret = 0; + + ret = da9121_i2c_reg_read(i2c, DA9121_REG_OTP_DEVICE_ID, + &device_id, 1); + if (ret < 0) { + dev_err(chip->dev, "Failed to read device ID: %d\n", ret); + goto error; + } + + ret = da9121_i2c_reg_read(i2c, DA9121_REG_OTP_VARIANT_ID, + &variant_id, 1); + if (ret < 0) { + dev_err(chip->dev, "Cannot read chip 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; + } + + name = of_get_property(chip->dev->of_node, "compatible", NULL); + if (!name) { + dev_err(chip->dev, "Cannot get device not compatible string.\n"); + 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; + + ret = da9121_get_device_type(i2c, chip); + if (ret) + return ret; + + 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; + } + + /* Set these up for of_regulator_match call which may want .of_map_modes */ + da9121_matches[0].desc = local_da9121_regulators[chip->variant_id][0]; + da9121_matches[1].desc = local_da9121_regulators[chip->variant_id][1]; + + 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); + } + + 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 +438,6 @@ 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 +447,13 @@ 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)) { diff --git a/include/linux/regulator/da9121.h b/include/linux/regulator/da9121.h new file mode 100644 index 0000000..c31180d --- /dev/null +++ b/include/linux/regulator/da9121.h @@ -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 -- 1.9.1