diff options
Diffstat (limited to 'drivers/regulator/qcom-labibb-regulator.c')
| -rw-r--r-- | drivers/regulator/qcom-labibb-regulator.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/drivers/regulator/qcom-labibb-regulator.c b/drivers/regulator/qcom-labibb-regulator.c index 0fe0f6bce4cf..0643713d6aad 100644 --- a/drivers/regulator/qcom-labibb-regulator.c +++ b/drivers/regulator/qcom-labibb-regulator.c @@ -29,6 +29,15 @@ #define LABIBB_STATUS1_VREG_OK_BIT BIT(7) #define LABIBB_CONTROL_ENABLE BIT(7) +#define REG_LABIBB_CURRENT_LIMIT 0x4b + #define LAB_CURRENT_LIMIT_MASK GENMASK(2, 0) + #define IBB_CURRENT_LIMIT_MASK GENMASK(4, 0) + #define LAB_CURRENT_LIMIT_OVERRIDE_EN BIT(3) + #define LABIBB_CURRENT_LIMIT_EN BIT(7) + +#define REG_LABIBB_SEC_ACCESS 0xd0 + #define LABIBB_SEC_UNLOCK_CODE 0xa5 + #define LAB_ENABLE_CTL_MASK BIT(7) #define IBB_ENABLE_CTL_MASK (BIT(7) | BIT(6)) @@ -37,11 +46,18 @@ #define IBB_ENABLE_TIME (LABIBB_OFF_ON_DELAY * 10) #define LABIBB_POLL_ENABLED_TIME 1000 +struct labibb_current_limits { + u32 uA_min; + u32 uA_step; + u8 ovr_val; +}; + struct labibb_regulator { struct regulator_desc desc; struct device *dev; struct regmap *regmap; struct regulator_dev *rdev; + struct labibb_current_limits uA_limits; u16 base; u8 type; }; @@ -53,6 +69,57 @@ struct labibb_regulator_data { const struct regulator_desc *desc; }; +static int qcom_labibb_set_current_limit(struct regulator_dev *rdev, + int min_uA, int max_uA) +{ + struct labibb_regulator *vreg = rdev_get_drvdata(rdev); + struct regulator_desc *desc = &vreg->desc; + struct labibb_current_limits *lim = &vreg->uA_limits; + u32 mask, val; + int i, ret, sel = -1; + + if (min_uA < lim->uA_min || max_uA < lim->uA_min) + return -EINVAL; + + for (i = 0; i < desc->n_current_limits; i++) { + int uA_limit = (lim->uA_step * i) + lim->uA_min; + + if (max_uA >= uA_limit && min_uA <= uA_limit) + sel = i; + } + if (sel < 0) + return -EINVAL; + + /* Current limit setting needs secure access */ + ret = regmap_write(vreg->regmap, vreg->base + REG_LABIBB_SEC_ACCESS, + LABIBB_SEC_UNLOCK_CODE); + if (ret) + return ret; + + mask = desc->csel_mask | lim->ovr_val; + mask |= LABIBB_CURRENT_LIMIT_EN; + val = (u32)sel | lim->ovr_val; + val |= LABIBB_CURRENT_LIMIT_EN; + + return regmap_update_bits(vreg->regmap, desc->csel_reg, mask, val); +} + +static int qcom_labibb_get_current_limit(struct regulator_dev *rdev) +{ + struct labibb_regulator *vreg = rdev_get_drvdata(rdev); + struct regulator_desc *desc = &vreg->desc; + struct labibb_current_limits *lim = &vreg->uA_limits; + unsigned int cur_step; + int ret; + + ret = regmap_read(vreg->regmap, desc->csel_reg, &cur_step); + if (ret) + return ret; + cur_step &= desc->csel_mask; + + return (cur_step * lim->uA_step) + lim->uA_min; +} + static const struct regulator_ops qcom_labibb_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, @@ -61,6 +128,8 @@ static const struct regulator_ops qcom_labibb_ops = { .get_voltage_sel = regulator_get_voltage_sel_regmap, .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, + .set_current_limit = qcom_labibb_set_current_limit, + .get_current_limit = qcom_labibb_get_current_limit, }; static const struct regulator_desc pmi8998_lab_desc = { @@ -73,6 +142,9 @@ static const struct regulator_desc pmi8998_lab_desc = { .vsel_mask = LAB_VOLTAGE_SET_MASK, .apply_reg = (PMI8998_LAB_REG_BASE + REG_LABIBB_VOLTAGE), .apply_bit = LABIBB_VOLTAGE_OVERRIDE_EN, + .csel_reg = (PMI8998_LAB_REG_BASE + REG_LABIBB_CURRENT_LIMIT), + .csel_mask = LAB_CURRENT_LIMIT_MASK, + .n_current_limits = 8, .off_on_delay = LABIBB_OFF_ON_DELAY, .owner = THIS_MODULE, .type = REGULATOR_VOLTAGE, @@ -92,6 +164,9 @@ static const struct regulator_desc pmi8998_ibb_desc = { .vsel_mask = IBB_VOLTAGE_SET_MASK, .apply_reg = (PMI8998_IBB_REG_BASE + REG_LABIBB_VOLTAGE), .apply_bit = LABIBB_VOLTAGE_OVERRIDE_EN, + .csel_reg = (PMI8998_IBB_REG_BASE + REG_LABIBB_CURRENT_LIMIT), + .csel_mask = IBB_CURRENT_LIMIT_MASK, + .n_current_limits = 32, .off_on_delay = LABIBB_OFF_ON_DELAY, .owner = THIS_MODULE, .type = REGULATOR_VOLTAGE, @@ -163,6 +238,23 @@ static int qcom_labibb_regulator_probe(struct platform_device *pdev) vreg->base = reg_data->base; vreg->type = reg_data->type; + switch (vreg->type) { + case QCOM_LAB_TYPE: + /* LAB Limits: 200-1600mA */ + vreg->uA_limits.uA_min = 200000; + vreg->uA_limits.uA_step = 200000; + vreg->uA_limits.ovr_val = LAB_CURRENT_LIMIT_OVERRIDE_EN; + break; + case QCOM_IBB_TYPE: + /* IBB Limits: 0-1550mA */ + vreg->uA_limits.uA_min = 0; + vreg->uA_limits.uA_step = 50000; + vreg->uA_limits.ovr_val = 0; /* No override bit */ + break; + default: + return -EINVAL; + } + memcpy(&vreg->desc, reg_data->desc, sizeof(vreg->desc)); vreg->desc.of_match = reg_data->name; vreg->desc.name = reg_data->name; |