diff --git a/drivers/regulator/da9121-regulator.c b/drivers/regulator/da9121-regulator.c index a717e2b1da33..1f74371eebad 100644 --- a/drivers/regulator/da9121-regulator.c +++ b/drivers/regulator/da9121-regulator.c @@ -14,6 +14,7 @@ // Copyright (C) 2020 Dialog Semiconductor #include +#include #include #include #include @@ -28,10 +29,67 @@ /* Chip data */ struct da9121 { struct device *dev; + struct da9121_pdata *pdata; struct regmap *regmap; int variant_id; }; +/* Define ranges for different variants, enabling translation to/from + * registers. Maximums give scope to allow for transients. + */ +struct da9121_range { + int val_min; + int val_max; + int val_stp; + int reg_min; + int reg_max; +}; + +struct da9121_range da9121_10A_2phase_current = { + .val_min = 7000000, + .val_max = 20000000, + .val_stp = 1000000, + .reg_min = 1, + .reg_max = 14, +}; + +struct da9121_range da9121_6A_2phase_current = { + .val_min = 7000000, + .val_max = 12000000, + .val_stp = 1000000, + .reg_min = 1, + .reg_max = 6, +}; + +struct da9121_range da9121_5A_1phase_current = { + .val_min = 3500000, + .val_max = 10000000, + .val_stp = 500000, + .reg_min = 1, + .reg_max = 14, +}; + +struct da9121_range da9121_3A_1phase_current = { + .val_min = 3500000, + .val_max = 6000000, + .val_stp = 500000, + .reg_min = 1, + .reg_max = 6, +}; + +struct da9121_variant_info { + int num_bucks; + int num_phases; + struct da9121_range *current_range; +}; + +static const struct da9121_variant_info variant_parameters[] = { + { 1, 2, &da9121_10A_2phase_current }, //DA9121_TYPE_DA9121_DA9130 + { 2, 1, &da9121_3A_1phase_current }, //DA9121_TYPE_DA9220_DA9132 + { 2, 1, &da9121_5A_1phase_current }, //DA9121_TYPE_DA9122_DA9131 + { 1, 2, &da9121_6A_2phase_current }, //DA9121_TYPE_DA9217 +}; + static const struct regulator_ops da9121_buck_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, @@ -46,6 +104,59 @@ static struct of_regulator_match da9121_matches[] = { [DA9121_IDX_BUCK2] = { .name = "buck2" }, }; +static int da9121_of_parse_cb(struct device_node *np, + const struct regulator_desc *desc, + struct regulator_config *config) +{ + struct da9121 *chip = config->driver_data; + struct da9121_pdata *pdata; + struct gpio_desc *ena_gpiod; + + if (chip->pdata == NULL) { + pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + } else { + pdata = chip->pdata; + } + + pdata->num_buck++; + + if (pdata->num_buck > variant_parameters[chip->variant_id].num_bucks) { + dev_err(chip->dev, "Error: excessive regulators for device\n"); + return -ENODEV; + } + + ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np), "enable", 0, + GPIOD_OUT_HIGH | + GPIOD_FLAGS_BIT_NONEXCLUSIVE, + "da9121-enable"); + if (!IS_ERR(ena_gpiod)) + config->ena_gpiod = ena_gpiod; + + if (variant_parameters[chip->variant_id].num_bucks == 2) { + uint32_t ripple_cancel; + uint32_t ripple_reg; + int ret; + + if (of_property_read_u32(da9121_matches[pdata->num_buck].of_node, + "dlg,ripple-cancel", &ripple_cancel)) { + if (pdata->num_buck > 1) + ripple_reg = DA9xxx_REG_BUCK_BUCK2_7; + else + ripple_reg = DA9121_REG_BUCK_BUCK1_7; + + ret = regmap_update_bits(chip->regmap, ripple_reg, + DA9xxx_MASK_BUCK_BUCKx_7_CHx_RIPPLE_CANCEL, + ripple_cancel); + if (ret < 0) + dev_err(chip->dev, "Cannot set ripple mode, err: %d\n", ret); + } + } + + return 0; +} + #define DA9121_MIN_MV 300 #define DA9121_MAX_MV 1900 #define DA9121_STEP_MV 10 @@ -57,6 +168,7 @@ static const struct regulator_desc da9121_reg = { .id = DA9121_IDX_BUCK1, .name = "da9121", .of_match = "buck1", + .of_parse_cb = da9121_of_parse_cb, .owner = THIS_MODULE, .regulators_node = of_match_ptr("regulators"), .ops = &da9121_buck_ops, @@ -80,6 +192,7 @@ static const struct regulator_desc da9220_reg[2] = { .id = DA9121_IDX_BUCK1, .name = "DA9220/DA9132 BUCK1", .of_match = "buck1", + .of_parse_cb = da9121_of_parse_cb, .owner = THIS_MODULE, .regulators_node = of_match_ptr("regulators"), .ops = &da9121_buck_ops, @@ -97,6 +210,7 @@ static const struct regulator_desc da9220_reg[2] = { .id = DA9121_IDX_BUCK2, .name = "DA9220/DA9132 BUCK2", .of_match = "buck2", + .of_parse_cb = da9121_of_parse_cb, .owner = THIS_MODULE, .regulators_node = of_match_ptr("regulators"), .ops = &da9121_buck_ops, @@ -117,6 +231,7 @@ static const struct regulator_desc da9122_reg[2] = { .id = DA9121_IDX_BUCK1, .name = "DA9122/DA9131 BUCK1", .of_match = "buck1", + .of_parse_cb = da9121_of_parse_cb, .owner = THIS_MODULE, .regulators_node = of_match_ptr("regulators"), .ops = &da9121_buck_ops, @@ -134,6 +249,7 @@ static const struct regulator_desc da9122_reg[2] = { .id = DA9121_IDX_BUCK2, .name = "DA9122/DA9131 BUCK2", .of_match = "buck2", + .of_parse_cb = da9121_of_parse_cb, .owner = THIS_MODULE, .regulators_node = of_match_ptr("regulators"), .ops = &da9121_buck_ops, @@ -153,6 +269,7 @@ static const struct regulator_desc da9217_reg = { .id = DA9121_IDX_BUCK1, .name = "DA9217 BUCK1", .of_match = "buck1", + .of_parse_cb = da9121_of_parse_cb, .owner = THIS_MODULE, .regulators_node = of_match_ptr("regulators"), .ops = &da9121_buck_ops, @@ -415,6 +532,7 @@ static int da9121_i2c_probe(struct i2c_client *i2c, goto error; } + chip->pdata = i2c->dev.platform_data; chip->variant_id = da9121_of_get_id(&i2c->dev); ret = da9121_assign_chip_model(i2c, chip); @@ -422,6 +540,7 @@ static int da9121_i2c_probe(struct i2c_client *i2c, goto error; config.dev = &i2c->dev; + config.driver_data = chip; config.of_node = dev->of_node; config.regmap = chip->regmap; diff --git a/include/linux/regulator/da9121.h b/include/linux/regulator/da9121.h index c31180d886cc..62d9d257dc25 100644 --- a/include/linux/regulator/da9121.h +++ b/include/linux/regulator/da9121.h @@ -16,10 +16,21 @@ #ifndef __LINUX_REGULATOR_DA9121_H #define __LINUX_REGULATOR_DA9121_H +#include + +struct gpio_desc; + enum { DA9121_IDX_BUCK1, DA9121_IDX_BUCK2, DA9121_IDX_MAX }; +struct da9121_pdata { + int num_buck; + struct gpio_desc *gpiod_ren[DA9121_IDX_MAX]; + struct device_node *reg_node[DA9121_IDX_MAX]; + struct regulator_init_data *init_data[DA9121_IDX_MAX]; +}; + #endif