diff options
Diffstat (limited to 'drivers/regulator/mt6360-regulator.c')
| -rw-r--r-- | drivers/regulator/mt6360-regulator.c | 458 |
1 files changed, 458 insertions, 0 deletions
diff --git a/drivers/regulator/mt6360-regulator.c b/drivers/regulator/mt6360-regulator.c new file mode 100644 index 0000000000..ad6587a378 --- /dev/null +++ b/drivers/regulator/mt6360-regulator.c @@ -0,0 +1,458 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// Copyright (C) 2020 MediaTek Inc. +// +// Author: Gene Chen <gene_chen@richtek.com> + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> + +#include <dt-bindings/regulator/mediatek,mt6360-regulator.h> + +enum { + MT6360_REGULATOR_BUCK1 = 0, + MT6360_REGULATOR_BUCK2, + MT6360_REGULATOR_LDO6, + MT6360_REGULATOR_LDO7, + MT6360_REGULATOR_LDO1, + MT6360_REGULATOR_LDO2, + MT6360_REGULATOR_LDO3, + MT6360_REGULATOR_LDO5, + MT6360_REGULATOR_MAX, +}; + +struct mt6360_irq_mapping { + const char *name; + irq_handler_t handler; +}; + +struct mt6360_regulator_desc { + const struct regulator_desc desc; + unsigned int mode_reg; + unsigned int mode_mask; + unsigned int state_reg; + unsigned int state_mask; + const struct mt6360_irq_mapping *irq_tables; + int irq_table_size; +}; + +struct mt6360_regulator_data { + struct device *dev; + struct regmap *regmap; +}; + +static irqreturn_t mt6360_pgb_event_handler(int irq, void *data) +{ + struct regulator_dev *rdev = data; + + regulator_notifier_call_chain(rdev, REGULATOR_EVENT_FAIL, NULL); + return IRQ_HANDLED; +} + +static irqreturn_t mt6360_oc_event_handler(int irq, void *data) +{ + struct regulator_dev *rdev = data; + + regulator_notifier_call_chain(rdev, REGULATOR_EVENT_OVER_CURRENT, NULL); + return IRQ_HANDLED; +} + +static irqreturn_t mt6360_ov_event_handler(int irq, void *data) +{ + struct regulator_dev *rdev = data; + + regulator_notifier_call_chain(rdev, REGULATOR_EVENT_REGULATION_OUT, NULL); + return IRQ_HANDLED; +} + +static irqreturn_t mt6360_uv_event_handler(int irq, void *data) +{ + struct regulator_dev *rdev = data; + + regulator_notifier_call_chain(rdev, REGULATOR_EVENT_UNDER_VOLTAGE, NULL); + return IRQ_HANDLED; +} + +static const struct mt6360_irq_mapping buck1_irq_tbls[] = { + { "buck1_pgb_evt", mt6360_pgb_event_handler }, + { "buck1_oc_evt", mt6360_oc_event_handler }, + { "buck1_ov_evt", mt6360_ov_event_handler }, + { "buck1_uv_evt", mt6360_uv_event_handler }, +}; + +static const struct mt6360_irq_mapping buck2_irq_tbls[] = { + { "buck2_pgb_evt", mt6360_pgb_event_handler }, + { "buck2_oc_evt", mt6360_oc_event_handler }, + { "buck2_ov_evt", mt6360_ov_event_handler }, + { "buck2_uv_evt", mt6360_uv_event_handler }, +}; + +static const struct mt6360_irq_mapping ldo6_irq_tbls[] = { + { "ldo6_pgb_evt", mt6360_pgb_event_handler }, + { "ldo6_oc_evt", mt6360_oc_event_handler }, +}; + +static const struct mt6360_irq_mapping ldo7_irq_tbls[] = { + { "ldo7_pgb_evt", mt6360_pgb_event_handler }, + { "ldo7_oc_evt", mt6360_oc_event_handler }, +}; + +static const struct mt6360_irq_mapping ldo1_irq_tbls[] = { + { "ldo1_pgb_evt", mt6360_pgb_event_handler }, + { "ldo1_oc_evt", mt6360_oc_event_handler }, +}; + +static const struct mt6360_irq_mapping ldo2_irq_tbls[] = { + { "ldo2_pgb_evt", mt6360_pgb_event_handler }, + { "ldo2_oc_evt", mt6360_oc_event_handler }, +}; + +static const struct mt6360_irq_mapping ldo3_irq_tbls[] = { + { "ldo3_pgb_evt", mt6360_pgb_event_handler }, + { "ldo3_oc_evt", mt6360_oc_event_handler }, +}; + +static const struct mt6360_irq_mapping ldo5_irq_tbls[] = { + { "ldo5_pgb_evt", mt6360_pgb_event_handler }, + { "ldo5_oc_evt", mt6360_oc_event_handler }, +}; + +static const struct linear_range buck_vout_ranges[] = { + REGULATOR_LINEAR_RANGE(300000, 0x00, 0xc7, 5000), + REGULATOR_LINEAR_RANGE(1300000, 0xc8, 0xff, 0), +}; + +static const struct linear_range ldo_vout_ranges1[] = { + REGULATOR_LINEAR_RANGE(500000, 0x00, 0x09, 10000), + REGULATOR_LINEAR_RANGE(600000, 0x0a, 0x10, 0), + REGULATOR_LINEAR_RANGE(610000, 0x11, 0x19, 10000), + REGULATOR_LINEAR_RANGE(700000, 0x1a, 0x20, 0), + REGULATOR_LINEAR_RANGE(710000, 0x21, 0x29, 10000), + REGULATOR_LINEAR_RANGE(800000, 0x2a, 0x30, 0), + REGULATOR_LINEAR_RANGE(810000, 0x31, 0x39, 10000), + REGULATOR_LINEAR_RANGE(900000, 0x3a, 0x40, 0), + REGULATOR_LINEAR_RANGE(910000, 0x41, 0x49, 10000), + REGULATOR_LINEAR_RANGE(1000000, 0x4a, 0x50, 0), + REGULATOR_LINEAR_RANGE(1010000, 0x51, 0x59, 10000), + REGULATOR_LINEAR_RANGE(1100000, 0x5a, 0x60, 0), + REGULATOR_LINEAR_RANGE(1110000, 0x61, 0x69, 10000), + REGULATOR_LINEAR_RANGE(1200000, 0x6a, 0x70, 0), + REGULATOR_LINEAR_RANGE(1210000, 0x71, 0x79, 10000), + REGULATOR_LINEAR_RANGE(1300000, 0x7a, 0x80, 0), + REGULATOR_LINEAR_RANGE(1310000, 0x81, 0x89, 10000), + REGULATOR_LINEAR_RANGE(1400000, 0x8a, 0x90, 0), + REGULATOR_LINEAR_RANGE(1410000, 0x91, 0x99, 10000), + REGULATOR_LINEAR_RANGE(1500000, 0x9a, 0xa0, 0), + REGULATOR_LINEAR_RANGE(1510000, 0xa1, 0xa9, 10000), + REGULATOR_LINEAR_RANGE(1600000, 0xaa, 0xb0, 0), + REGULATOR_LINEAR_RANGE(1610000, 0xb1, 0xb9, 10000), + REGULATOR_LINEAR_RANGE(1700000, 0xba, 0xc0, 0), + REGULATOR_LINEAR_RANGE(1710000, 0xc1, 0xc9, 10000), + REGULATOR_LINEAR_RANGE(1800000, 0xca, 0xd0, 0), + REGULATOR_LINEAR_RANGE(1810000, 0xd1, 0xd9, 10000), + REGULATOR_LINEAR_RANGE(1900000, 0xda, 0xe0, 0), + REGULATOR_LINEAR_RANGE(1910000, 0xe1, 0xe9, 10000), + REGULATOR_LINEAR_RANGE(2000000, 0xea, 0xf0, 0), + REGULATOR_LINEAR_RANGE(2010000, 0xf1, 0xf9, 10000), + REGULATOR_LINEAR_RANGE(2100000, 0xfa, 0xff, 0), +}; + +static const struct linear_range ldo_vout_ranges2[] = { + REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x09, 10000), + REGULATOR_LINEAR_RANGE(1300000, 0x0a, 0x10, 0), + REGULATOR_LINEAR_RANGE(1310000, 0x11, 0x19, 10000), + REGULATOR_LINEAR_RANGE(1400000, 0x1a, 0x1f, 0), + REGULATOR_LINEAR_RANGE(1500000, 0x20, 0x29, 10000), + REGULATOR_LINEAR_RANGE(1600000, 0x2a, 0x2f, 0), + REGULATOR_LINEAR_RANGE(1700000, 0x30, 0x39, 10000), + REGULATOR_LINEAR_RANGE(1800000, 0x3a, 0x40, 0), + REGULATOR_LINEAR_RANGE(1810000, 0x41, 0x49, 10000), + REGULATOR_LINEAR_RANGE(1900000, 0x4a, 0x4f, 0), + REGULATOR_LINEAR_RANGE(2000000, 0x50, 0x59, 10000), + REGULATOR_LINEAR_RANGE(2100000, 0x5a, 0x60, 0), + REGULATOR_LINEAR_RANGE(2110000, 0x61, 0x69, 10000), + REGULATOR_LINEAR_RANGE(2200000, 0x6a, 0x6f, 0), + REGULATOR_LINEAR_RANGE(2500000, 0x70, 0x79, 10000), + REGULATOR_LINEAR_RANGE(2600000, 0x7a, 0x7f, 0), + REGULATOR_LINEAR_RANGE(2700000, 0x80, 0x89, 10000), + REGULATOR_LINEAR_RANGE(2800000, 0x8a, 0x90, 0), + REGULATOR_LINEAR_RANGE(2810000, 0x91, 0x99, 10000), + REGULATOR_LINEAR_RANGE(2900000, 0x9a, 0xa0, 0), + REGULATOR_LINEAR_RANGE(2910000, 0xa1, 0xa9, 10000), + REGULATOR_LINEAR_RANGE(3000000, 0xaa, 0xb0, 0), + REGULATOR_LINEAR_RANGE(3010000, 0xb1, 0xb9, 10000), + REGULATOR_LINEAR_RANGE(3100000, 0xba, 0xc0, 0), + REGULATOR_LINEAR_RANGE(3110000, 0xc1, 0xc9, 10000), + REGULATOR_LINEAR_RANGE(3200000, 0xca, 0xcf, 0), + REGULATOR_LINEAR_RANGE(3300000, 0xd0, 0xd9, 10000), + REGULATOR_LINEAR_RANGE(3400000, 0xda, 0xe0, 0), + REGULATOR_LINEAR_RANGE(3410000, 0xe1, 0xe9, 10000), + REGULATOR_LINEAR_RANGE(3500000, 0xea, 0xf0, 0), + REGULATOR_LINEAR_RANGE(3510000, 0xf1, 0xf9, 10000), + REGULATOR_LINEAR_RANGE(3600000, 0xfa, 0xff, 0), +}; + +static const struct linear_range ldo_vout_ranges3[] = { + REGULATOR_LINEAR_RANGE(2700000, 0x00, 0x09, 10000), + REGULATOR_LINEAR_RANGE(2800000, 0x0a, 0x10, 0), + REGULATOR_LINEAR_RANGE(2810000, 0x11, 0x19, 10000), + REGULATOR_LINEAR_RANGE(2900000, 0x1a, 0x20, 0), + REGULATOR_LINEAR_RANGE(2910000, 0x21, 0x29, 10000), + REGULATOR_LINEAR_RANGE(3000000, 0x2a, 0x30, 0), + REGULATOR_LINEAR_RANGE(3010000, 0x31, 0x39, 10000), + REGULATOR_LINEAR_RANGE(3100000, 0x3a, 0x40, 0), + REGULATOR_LINEAR_RANGE(3110000, 0x41, 0x49, 10000), + REGULATOR_LINEAR_RANGE(3200000, 0x4a, 0x4f, 0), + REGULATOR_LINEAR_RANGE(3300000, 0x50, 0x59, 10000), + REGULATOR_LINEAR_RANGE(3400000, 0x5a, 0x60, 0), + REGULATOR_LINEAR_RANGE(3410000, 0x61, 0x69, 10000), + REGULATOR_LINEAR_RANGE(3500000, 0x6a, 0x70, 0), + REGULATOR_LINEAR_RANGE(3510000, 0x71, 0x79, 10000), + REGULATOR_LINEAR_RANGE(3600000, 0x7a, 0x7f, 0), +}; + +static int mt6360_regulator_set_mode(struct regulator_dev *rdev, + unsigned int mode) +{ + const struct mt6360_regulator_desc *rdesc = (struct mt6360_regulator_desc *)rdev->desc; + struct regmap *regmap = rdev_get_regmap(rdev); + int shift = ffs(rdesc->mode_mask) - 1; + unsigned int val; + int ret; + + switch (mode) { + case REGULATOR_MODE_NORMAL: + val = MT6360_OPMODE_NORMAL; + break; + case REGULATOR_MODE_STANDBY: + val = MT6360_OPMODE_ULP; + break; + case REGULATOR_MODE_IDLE: + val = MT6360_OPMODE_LP; + break; + default: + return -EINVAL; + } + + ret = regmap_update_bits(regmap, rdesc->mode_reg, rdesc->mode_mask, val << shift); + if (ret) { + dev_err(&rdev->dev, "%s: fail (%d)\n", __func__, ret); + return ret; + } + + return 0; +} + +static unsigned int mt6360_regulator_get_mode(struct regulator_dev *rdev) +{ + const struct mt6360_regulator_desc *rdesc = (struct mt6360_regulator_desc *)rdev->desc; + struct regmap *regmap = rdev_get_regmap(rdev); + int shift = ffs(rdesc->mode_mask) - 1; + unsigned int val; + int ret; + + ret = regmap_read(regmap, rdesc->mode_reg, &val); + if (ret) + return ret; + + val &= rdesc->mode_mask; + val >>= shift; + + switch (val) { + case MT6360_OPMODE_LP: + return REGULATOR_MODE_IDLE; + case MT6360_OPMODE_ULP: + return REGULATOR_MODE_STANDBY; + case MT6360_OPMODE_NORMAL: + return REGULATOR_MODE_NORMAL; + default: + return -EINVAL; + } +} + +static int mt6360_regulator_get_status(struct regulator_dev *rdev) +{ + const struct mt6360_regulator_desc *rdesc = (struct mt6360_regulator_desc *)rdev->desc; + struct regmap *regmap = rdev_get_regmap(rdev); + unsigned int val; + int ret; + + ret = regmap_read(regmap, rdesc->state_reg, &val); + if (ret) + return ret; + + if (val & rdesc->state_mask) + return REGULATOR_STATUS_ON; + + return REGULATOR_STATUS_OFF; +} + +static const struct regulator_ops mt6360_regulator_ops = { + .list_voltage = regulator_list_voltage_linear_range, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_mode = mt6360_regulator_set_mode, + .get_mode = mt6360_regulator_get_mode, + .get_status = mt6360_regulator_get_status, +}; + +static unsigned int mt6360_regulator_of_map_mode(unsigned int hw_mode) +{ + switch (hw_mode) { + case MT6360_OPMODE_NORMAL: + return REGULATOR_MODE_NORMAL; + case MT6360_OPMODE_LP: + return REGULATOR_MODE_IDLE; + case MT6360_OPMODE_ULP: + return REGULATOR_MODE_STANDBY; + default: + return REGULATOR_MODE_INVALID; + } +} + +#define MT6360_REGULATOR_DESC(_name, _sname, ereg, emask, vreg, vmask, \ + mreg, mmask, streg, stmask, vranges, \ + vcnts, offon_delay, irq_tbls) \ +{ \ + .desc = { \ + .name = #_name, \ + .supply_name = #_sname, \ + .id = MT6360_REGULATOR_##_name, \ + .of_match = of_match_ptr(#_name), \ + .regulators_node = of_match_ptr("regulator"), \ + .of_map_mode = mt6360_regulator_of_map_mode, \ + .owner = THIS_MODULE, \ + .ops = &mt6360_regulator_ops, \ + .type = REGULATOR_VOLTAGE, \ + .vsel_reg = vreg, \ + .vsel_mask = vmask, \ + .enable_reg = ereg, \ + .enable_mask = emask, \ + .linear_ranges = vranges, \ + .n_linear_ranges = ARRAY_SIZE(vranges), \ + .n_voltages = vcnts, \ + .off_on_delay = offon_delay, \ + }, \ + .mode_reg = mreg, \ + .mode_mask = mmask, \ + .state_reg = streg, \ + .state_mask = stmask, \ + .irq_tables = irq_tbls, \ + .irq_table_size = ARRAY_SIZE(irq_tbls), \ +} + +static const struct mt6360_regulator_desc mt6360_regulator_descs[] = { + MT6360_REGULATOR_DESC(BUCK1, BUCK1_VIN, 0x117, 0x40, 0x110, 0xff, 0x117, 0x30, 0x117, 0x04, + buck_vout_ranges, 256, 0, buck1_irq_tbls), + MT6360_REGULATOR_DESC(BUCK2, BUCK2_VIN, 0x127, 0x40, 0x120, 0xff, 0x127, 0x30, 0x127, 0x04, + buck_vout_ranges, 256, 0, buck2_irq_tbls), + MT6360_REGULATOR_DESC(LDO6, LDO_VIN3, 0x137, 0x40, 0x13B, 0xff, 0x137, 0x30, 0x137, 0x04, + ldo_vout_ranges1, 256, 0, ldo6_irq_tbls), + MT6360_REGULATOR_DESC(LDO7, LDO_VIN3, 0x131, 0x40, 0x135, 0xff, 0x131, 0x30, 0x131, 0x04, + ldo_vout_ranges1, 256, 0, ldo7_irq_tbls), + MT6360_REGULATOR_DESC(LDO1, LDO_VIN1, 0x217, 0x40, 0x21B, 0xff, 0x217, 0x30, 0x217, 0x04, + ldo_vout_ranges2, 256, 0, ldo1_irq_tbls), + MT6360_REGULATOR_DESC(LDO2, LDO_VIN1, 0x211, 0x40, 0x215, 0xff, 0x211, 0x30, 0x211, 0x04, + ldo_vout_ranges2, 256, 0, ldo2_irq_tbls), + MT6360_REGULATOR_DESC(LDO3, LDO_VIN1, 0x205, 0x40, 0x209, 0xff, 0x205, 0x30, 0x205, 0x04, + ldo_vout_ranges2, 256, 100, ldo3_irq_tbls), + MT6360_REGULATOR_DESC(LDO5, LDO_VIN2, 0x20B, 0x40, 0x20F, 0x7f, 0x20B, 0x30, 0x20B, 0x04, + ldo_vout_ranges3, 128, 100, ldo5_irq_tbls), +}; + +static int mt6360_regulator_irq_register(struct platform_device *pdev, + struct regulator_dev *rdev, + const struct mt6360_irq_mapping *tbls, + int tbl_size) +{ + int i, irq, ret; + + for (i = 0; i < tbl_size; i++) { + const struct mt6360_irq_mapping *irq_desc = tbls + i; + + irq = platform_get_irq_byname(pdev, irq_desc->name); + if (irq < 0) + return irq; + + ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, irq_desc->handler, 0, + irq_desc->name, rdev); + if (ret) { + dev_err(&pdev->dev, "Fail to request %s irq\n", irq_desc->name); + return ret; + } + } + + return 0; +} + +static int mt6360_regulator_probe(struct platform_device *pdev) +{ + struct mt6360_regulator_data *mrd; + struct regulator_config config = {}; + int i, ret; + + mrd = devm_kzalloc(&pdev->dev, sizeof(*mrd), GFP_KERNEL); + if (!mrd) + return -ENOMEM; + + mrd->dev = &pdev->dev; + + mrd->regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!mrd->regmap) { + dev_err(&pdev->dev, "Failed to get parent regmap\n"); + return -ENODEV; + } + + config.dev = pdev->dev.parent; + config.driver_data = mrd; + config.regmap = mrd->regmap; + + for (i = 0; i < ARRAY_SIZE(mt6360_regulator_descs); i++) { + const struct mt6360_regulator_desc *rdesc = mt6360_regulator_descs + i; + struct regulator_dev *rdev; + + rdev = devm_regulator_register(&pdev->dev, &rdesc->desc, &config); + if (IS_ERR(rdev)) { + dev_err(&pdev->dev, "Failed to register %d regulator\n", i); + return PTR_ERR(rdev); + } + + ret = mt6360_regulator_irq_register(pdev, rdev, rdesc->irq_tables, + rdesc->irq_table_size); + if (ret) { + dev_err(&pdev->dev, "Failed to register %d regulator irqs\n", i); + return ret; + } + } + + return 0; +} + +static const struct platform_device_id mt6360_regulator_id_table[] = { + { "mt6360-regulator", 0 }, + {}, +}; +MODULE_DEVICE_TABLE(platform, mt6360_regulator_id_table); + +static struct platform_driver mt6360_regulator_driver = { + .driver = { + .name = "mt6360-regulator", + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + }, + .probe = mt6360_regulator_probe, + .id_table = mt6360_regulator_id_table, +}; +module_platform_driver(mt6360_regulator_driver); + +MODULE_AUTHOR("Gene Chen <gene_chen@richtek.com>"); +MODULE_DESCRIPTION("MT6360 Regulator Driver"); +MODULE_LICENSE("GPL v2"); |