| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| ChiYuan Huang | 1560 | 99.17% | 1 | 50.00% |
| Yang Yingliang | 13 | 0.83% | 1 | 50.00% |
| Total | 1573 | 2 |
// SPDX-License-Identifier: GPL-2.0+ #include <linux/bits.h> #include <linux/i2c.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of_device.h> #include <linux/regmap.h> #include <linux/regulator/driver.h> #include <linux/regulator/of_regulator.h> #define RT5759_REG_VENDORINFO 0x00 #define RT5759_REG_FREQ 0x01 #define RT5759_REG_VSEL 0x02 #define RT5759_REG_DCDCCTRL 0x03 #define RT5759_REG_STATUS 0x04 #define RT5759_REG_DCDCSET 0x05 #define RT5759A_REG_WDTEN 0x42 #define RT5759_TSTEP_MASK GENMASK(3, 2) #define RT5759_VSEL_MASK GENMASK(6, 0) #define RT5759_DISCHARGE_MASK BIT(3) #define RT5759_FPWM_MASK BIT(2) #define RT5759_ENABLE_MASK BIT(1) #define RT5759_OT_MASK BIT(1) #define RT5759_UV_MASK BIT(0) #define RT5957_OCLVL_MASK GENMASK(7, 6) #define RT5759_OCLVL_SHIFT 6 #define RT5957_OTLVL_MASK GENMASK(5, 4) #define RT5759_OTLVL_SHIFT 4 #define RT5759A_WDTEN_MASK BIT(1) #define RT5759_MANUFACTURER_ID 0x82 /* vsel range 0x00 ~ 0x5A */ #define RT5759_NUM_VOLTS 91 #define RT5759_MIN_UV 600000 #define RT5759_STEP_UV 10000 #define RT5759A_STEP_UV 12500 #define RT5759_MINSS_TIMEUS 1500 #define RT5759_PSKIP_MODE 0 #define RT5759_FPWM_MODE 1 enum { CHIP_TYPE_RT5759 = 0, CHIP_TYPE_RT5759A, CHIP_TYPE_MAX }; struct rt5759_priv { struct device *dev; struct regmap *regmap; struct regulator_desc desc; unsigned long chip_type; }; static int rt5759_set_mode(struct regulator_dev *rdev, unsigned int mode) { struct regmap *regmap = rdev_get_regmap(rdev); unsigned int mode_val; switch (mode) { case REGULATOR_MODE_NORMAL: mode_val = 0; break; case REGULATOR_MODE_FAST: mode_val = RT5759_FPWM_MASK; break; default: return -EINVAL; } return regmap_update_bits(regmap, RT5759_REG_STATUS, RT5759_FPWM_MASK, mode_val); } static unsigned int rt5759_get_mode(struct regulator_dev *rdev) { struct regmap *regmap = rdev_get_regmap(rdev); unsigned int regval; int ret; ret = regmap_read(regmap, RT5759_REG_DCDCCTRL, ®val); if (ret) return REGULATOR_MODE_INVALID; if (regval & RT5759_FPWM_MASK) return REGULATOR_MODE_FAST; return REGULATOR_MODE_NORMAL; } static int rt5759_get_error_flags(struct regulator_dev *rdev, unsigned int *flags) { struct regmap *regmap = rdev_get_regmap(rdev); unsigned int status, events = 0; int ret; ret = regmap_read(regmap, RT5759_REG_STATUS, &status); if (ret) return ret; if (status & RT5759_OT_MASK) events |= REGULATOR_ERROR_OVER_TEMP; if (status & RT5759_UV_MASK) events |= REGULATOR_ERROR_UNDER_VOLTAGE; *flags = events; return 0; } static int rt5759_set_ocp(struct regulator_dev *rdev, int lim_uA, int severity, bool enable) { struct regmap *regmap = rdev_get_regmap(rdev); int ocp_lvl[] = { 9800000, 10800000, 11800000 }; unsigned int ocp_regval; int i; /* Only support over current protection parameter */ if (severity != REGULATOR_SEVERITY_PROT) return 0; if (enable) { /* Default ocp level is 10.8A */ if (lim_uA == 0) lim_uA = 10800000; for (i = 0; i < ARRAY_SIZE(ocp_lvl); i++) { if (lim_uA <= ocp_lvl[i]) break; } if (i == ARRAY_SIZE(ocp_lvl)) i = ARRAY_SIZE(ocp_lvl) - 1; ocp_regval = i + 1; } else ocp_regval = 0; return regmap_update_bits(regmap, RT5759_REG_DCDCSET, RT5957_OCLVL_MASK, ocp_regval << RT5759_OCLVL_SHIFT); } static int rt5759_set_otp(struct regulator_dev *rdev, int lim, int severity, bool enable) { struct regmap *regmap = rdev_get_regmap(rdev); int otp_lvl[] = { 140, 150, 170 }; unsigned int otp_regval; int i; /* Only support over temperature protection parameter */ if (severity != REGULATOR_SEVERITY_PROT) return 0; if (enable) { /* Default otp level is 150'c */ if (lim == 0) lim = 150; for (i = 0; i < ARRAY_SIZE(otp_lvl); i++) { if (lim <= otp_lvl[i]) break; } if (i == ARRAY_SIZE(otp_lvl)) i = ARRAY_SIZE(otp_lvl) - 1; otp_regval = i + 1; } else otp_regval = 0; return regmap_update_bits(regmap, RT5759_REG_DCDCSET, RT5957_OTLVL_MASK, otp_regval << RT5759_OTLVL_SHIFT); } static const struct regulator_ops rt5759_regulator_ops = { .list_voltage = regulator_list_voltage_linear, .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .set_active_discharge = regulator_set_active_discharge_regmap, .set_mode = rt5759_set_mode, .get_mode = rt5759_get_mode, .set_ramp_delay = regulator_set_ramp_delay_regmap, .get_error_flags = rt5759_get_error_flags, .set_over_current_protection = rt5759_set_ocp, .set_thermal_protection = rt5759_set_otp, }; static unsigned int rt5759_of_map_mode(unsigned int mode) { switch (mode) { case RT5759_FPWM_MODE: return REGULATOR_MODE_FAST; case RT5759_PSKIP_MODE: return REGULATOR_MODE_NORMAL; default: return REGULATOR_MODE_INVALID; } } static const unsigned int rt5759_ramp_table[] = { 20000, 15000, 10000, 5000 }; static int rt5759_regulator_register(struct rt5759_priv *priv) { struct device_node *np = priv->dev->of_node; struct regulator_desc *reg_desc = &priv->desc; struct regulator_config reg_cfg; struct regulator_dev *rdev; int ret; reg_desc->name = "rt5759-buck"; reg_desc->type = REGULATOR_VOLTAGE; reg_desc->owner = THIS_MODULE; reg_desc->ops = &rt5759_regulator_ops; reg_desc->n_voltages = RT5759_NUM_VOLTS; reg_desc->min_uV = RT5759_MIN_UV; reg_desc->uV_step = RT5759_STEP_UV; reg_desc->vsel_reg = RT5759_REG_VSEL; reg_desc->vsel_mask = RT5759_VSEL_MASK; reg_desc->enable_reg = RT5759_REG_DCDCCTRL; reg_desc->enable_mask = RT5759_ENABLE_MASK; reg_desc->active_discharge_reg = RT5759_REG_DCDCCTRL; reg_desc->active_discharge_mask = RT5759_DISCHARGE_MASK; reg_desc->active_discharge_on = RT5759_DISCHARGE_MASK; reg_desc->ramp_reg = RT5759_REG_FREQ; reg_desc->ramp_mask = RT5759_TSTEP_MASK; reg_desc->ramp_delay_table = rt5759_ramp_table; reg_desc->n_ramp_values = ARRAY_SIZE(rt5759_ramp_table); reg_desc->enable_time = RT5759_MINSS_TIMEUS; reg_desc->of_map_mode = rt5759_of_map_mode; /* * RT5759 step uV = 10000 * RT5759A step uV = 12500 */ if (priv->chip_type == CHIP_TYPE_RT5759A) reg_desc->uV_step = RT5759A_STEP_UV; memset(®_cfg, 0, sizeof(reg_cfg)); reg_cfg.dev = priv->dev; reg_cfg.of_node = np; reg_cfg.init_data = of_get_regulator_init_data(priv->dev, np, reg_desc); reg_cfg.regmap = priv->regmap; rdev = devm_regulator_register(priv->dev, reg_desc, ®_cfg); if (IS_ERR(rdev)) { ret = PTR_ERR(rdev); dev_err(priv->dev, "Failed to register regulator (%d)\n", ret); return ret; } return 0; } static int rt5759_init_device_property(struct rt5759_priv *priv) { unsigned int val = 0; /* * Only RT5759A support external watchdog input */ if (priv->chip_type != CHIP_TYPE_RT5759A) return 0; if (device_property_read_bool(priv->dev, "richtek,watchdog-enable")) val = RT5759A_WDTEN_MASK; return regmap_update_bits(priv->regmap, RT5759A_REG_WDTEN, RT5759A_WDTEN_MASK, val); } static int rt5759_manufacturer_check(struct rt5759_priv *priv) { unsigned int vendor; int ret; ret = regmap_read(priv->regmap, RT5759_REG_VENDORINFO, &vendor); if (ret) return ret; if (vendor != RT5759_MANUFACTURER_ID) { dev_err(priv->dev, "vendor info not correct (%d)\n", vendor); return -EINVAL; } return 0; } static bool rt5759_is_accessible_reg(struct device *dev, unsigned int reg) { struct rt5759_priv *priv = dev_get_drvdata(dev); if (reg <= RT5759_REG_DCDCSET) return true; if (priv->chip_type == CHIP_TYPE_RT5759A && reg == RT5759A_REG_WDTEN) return true; return false; } static const struct regmap_config rt5759_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = RT5759A_REG_WDTEN, .readable_reg = rt5759_is_accessible_reg, .writeable_reg = rt5759_is_accessible_reg, }; static int rt5759_probe(struct i2c_client *i2c) { struct rt5759_priv *priv; int ret; priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->dev = &i2c->dev; priv->chip_type = (unsigned long)of_device_get_match_data(&i2c->dev); i2c_set_clientdata(i2c, priv); priv->regmap = devm_regmap_init_i2c(i2c, &rt5759_regmap_config); if (IS_ERR(priv->regmap)) { ret = PTR_ERR(priv->regmap); dev_err(&i2c->dev, "Failed to allocate regmap (%d)\n", ret); return ret; } ret = rt5759_manufacturer_check(priv); if (ret) { dev_err(&i2c->dev, "Failed to check device (%d)\n", ret); return ret; } ret = rt5759_init_device_property(priv); if (ret) { dev_err(&i2c->dev, "Failed to init device (%d)\n", ret); return ret; } return rt5759_regulator_register(priv); } static const struct of_device_id __maybe_unused rt5759_device_table[] = { { .compatible = "richtek,rt5759", .data = (void *)CHIP_TYPE_RT5759 }, { .compatible = "richtek,rt5759a", .data = (void *)CHIP_TYPE_RT5759A }, {} }; MODULE_DEVICE_TABLE(of, rt5759_device_table); static struct i2c_driver rt5759_driver = { .driver = { .name = "rt5759", .of_match_table = of_match_ptr(rt5759_device_table), }, .probe_new = rt5759_probe, }; module_i2c_driver(rt5759_driver); MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>"); MODULE_DESCRIPTION("Richtek RT5759 Regulator Driver"); MODULE_LICENSE("GPL v2");
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