| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Philipp Zabel | 2260 | 94.56% | 1 | 9.09% |
| Javier Martinez Canillas | 102 | 4.27% | 1 | 9.09% |
| Bernhard Walle | 8 | 0.33% | 1 | 9.09% |
| David Frey | 6 | 0.25% | 1 | 9.09% |
| Axel Lin | 5 | 0.21% | 3 | 27.27% |
| Bhumika Goyal | 4 | 0.17% | 1 | 9.09% |
| Steffen Trumtrar | 3 | 0.13% | 1 | 9.09% |
| Arvind Yadav | 1 | 0.04% | 1 | 9.09% |
| Sachin Kamat | 1 | 0.04% | 1 | 9.09% |
| Total | 2390 | 11 |
/* * Linear Technology LTC3589,LTC3589-1 regulator support * * Copyright (c) 2014 Philipp Zabel <p.zabel@pengutronix.de>, Pengutronix * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #include <linux/i2c.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/regmap.h> #include <linux/regulator/driver.h> #include <linux/regulator/of_regulator.h> #define DRIVER_NAME "ltc3589" #define LTC3589_IRQSTAT 0x02 #define LTC3589_SCR1 0x07 #define LTC3589_OVEN 0x10 #define LTC3589_SCR2 0x12 #define LTC3589_PGSTAT 0x13 #define LTC3589_VCCR 0x20 #define LTC3589_CLIRQ 0x21 #define LTC3589_B1DTV1 0x23 #define LTC3589_B1DTV2 0x24 #define LTC3589_VRRCR 0x25 #define LTC3589_B2DTV1 0x26 #define LTC3589_B2DTV2 0x27 #define LTC3589_B3DTV1 0x29 #define LTC3589_B3DTV2 0x2a #define LTC3589_L2DTV1 0x32 #define LTC3589_L2DTV2 0x33 #define LTC3589_IRQSTAT_PGOOD_TIMEOUT BIT(3) #define LTC3589_IRQSTAT_UNDERVOLT_WARN BIT(4) #define LTC3589_IRQSTAT_UNDERVOLT_FAULT BIT(5) #define LTC3589_IRQSTAT_THERMAL_WARN BIT(6) #define LTC3589_IRQSTAT_THERMAL_FAULT BIT(7) #define LTC3589_OVEN_SW1 BIT(0) #define LTC3589_OVEN_SW2 BIT(1) #define LTC3589_OVEN_SW3 BIT(2) #define LTC3589_OVEN_BB_OUT BIT(3) #define LTC3589_OVEN_LDO2 BIT(4) #define LTC3589_OVEN_LDO3 BIT(5) #define LTC3589_OVEN_LDO4 BIT(6) #define LTC3589_OVEN_SW_CTRL BIT(7) #define LTC3589_VCCR_SW1_GO BIT(0) #define LTC3589_VCCR_SW2_GO BIT(2) #define LTC3589_VCCR_SW3_GO BIT(4) #define LTC3589_VCCR_LDO2_GO BIT(6) enum ltc3589_variant { LTC3589, LTC3589_1, LTC3589_2, }; enum ltc3589_reg { LTC3589_SW1, LTC3589_SW2, LTC3589_SW3, LTC3589_BB_OUT, LTC3589_LDO1, LTC3589_LDO2, LTC3589_LDO3, LTC3589_LDO4, LTC3589_NUM_REGULATORS, }; struct ltc3589_regulator { struct regulator_desc desc; /* External feedback voltage divider */ unsigned int r1; unsigned int r2; }; struct ltc3589 { struct regmap *regmap; struct device *dev; enum ltc3589_variant variant; struct ltc3589_regulator regulator_descs[LTC3589_NUM_REGULATORS]; struct regulator_dev *regulators[LTC3589_NUM_REGULATORS]; }; static const int ltc3589_ldo4[] = { 2800000, 2500000, 1800000, 3300000, }; static const int ltc3589_12_ldo4[] = { 1200000, 1800000, 2500000, 3200000, }; static int ltc3589_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) { struct ltc3589 *ltc3589 = rdev_get_drvdata(rdev); int sel, shift; if (unlikely(ramp_delay <= 0)) return -EINVAL; /* VRRCR slew rate offsets are the same as VCCR go bit offsets */ shift = ffs(rdev->desc->apply_bit) - 1; /* The slew rate can be set to 0.88, 1.75, 3.5, or 7 mV/uS */ for (sel = 0; sel < 4; sel++) { if ((880 << sel) >= ramp_delay) { return regmap_update_bits(ltc3589->regmap, LTC3589_VRRCR, 0x3 << shift, sel << shift); } } return -EINVAL; } static int ltc3589_set_suspend_voltage(struct regulator_dev *rdev, int uV) { struct ltc3589 *ltc3589 = rdev_get_drvdata(rdev); int sel; sel = regulator_map_voltage_linear(rdev, uV, uV); if (sel < 0) return sel; /* DTV2 register follows right after the corresponding DTV1 register */ return regmap_update_bits(ltc3589->regmap, rdev->desc->vsel_reg + 1, rdev->desc->vsel_mask, sel); } static int ltc3589_set_suspend_mode(struct regulator_dev *rdev, unsigned int mode) { struct ltc3589 *ltc3589 = rdev_get_drvdata(rdev); int mask, bit = 0; /* VCCR reference selects are right next to the VCCR go bits */ mask = rdev->desc->apply_bit << 1; if (mode == REGULATOR_MODE_STANDBY) bit = mask; /* Select DTV2 */ mask |= rdev->desc->apply_bit; bit |= rdev->desc->apply_bit; return regmap_update_bits(ltc3589->regmap, LTC3589_VCCR, mask, bit); } /* SW1, SW2, SW3, LDO2 */ static const struct regulator_ops ltc3589_linear_regulator_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .list_voltage = regulator_list_voltage_linear, .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_ramp_delay = ltc3589_set_ramp_delay, .set_voltage_time_sel = regulator_set_voltage_time_sel, .set_suspend_voltage = ltc3589_set_suspend_voltage, .set_suspend_mode = ltc3589_set_suspend_mode, }; /* BB_OUT, LDO3 */ static const struct regulator_ops ltc3589_fixed_regulator_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, }; /* LDO1 */ static const struct regulator_ops ltc3589_fixed_standby_regulator_ops = { }; /* LDO4 */ static const struct regulator_ops ltc3589_table_regulator_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .list_voltage = regulator_list_voltage_table, .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, }; #define LTC3589_REG(_name, _ops, en_bit, dtv1_reg, dtv_mask, go_bit) \ [LTC3589_ ## _name] = { \ .desc = { \ .name = #_name, \ .n_voltages = (dtv_mask) + 1, \ .min_uV = (go_bit) ? 362500 : 0, \ .uV_step = (go_bit) ? 12500 : 0, \ .ramp_delay = (go_bit) ? 1750 : 0, \ .fixed_uV = (dtv_mask) ? 0 : 800000, \ .ops = <c3589_ ## _ops ## _regulator_ops, \ .type = REGULATOR_VOLTAGE, \ .id = LTC3589_ ## _name, \ .owner = THIS_MODULE, \ .vsel_reg = (dtv1_reg), \ .vsel_mask = (dtv_mask), \ .apply_reg = (go_bit) ? LTC3589_VCCR : 0, \ .apply_bit = (go_bit), \ .enable_reg = (en_bit) ? LTC3589_OVEN : 0, \ .enable_mask = (en_bit), \ }, \ } #define LTC3589_LINEAR_REG(_name, _dtv1) \ LTC3589_REG(_name, linear, LTC3589_OVEN_ ## _name, \ LTC3589_ ## _dtv1, 0x1f, \ LTC3589_VCCR_ ## _name ## _GO) #define LTC3589_FIXED_REG(_name) \ LTC3589_REG(_name, fixed, LTC3589_OVEN_ ## _name, 0, 0, 0) static struct ltc3589_regulator ltc3589_regulators[LTC3589_NUM_REGULATORS] = { LTC3589_LINEAR_REG(SW1, B1DTV1), LTC3589_LINEAR_REG(SW2, B2DTV1), LTC3589_LINEAR_REG(SW3, B3DTV1), LTC3589_FIXED_REG(BB_OUT), LTC3589_REG(LDO1, fixed_standby, 0, 0, 0, 0), LTC3589_LINEAR_REG(LDO2, L2DTV1), LTC3589_FIXED_REG(LDO3), LTC3589_REG(LDO4, table, LTC3589_OVEN_LDO4, LTC3589_L2DTV2, 0x60, 0), }; #ifdef CONFIG_OF static struct of_regulator_match ltc3589_matches[LTC3589_NUM_REGULATORS] = { { .name = "sw1", }, { .name = "sw2", }, { .name = "sw3", }, { .name = "bb-out", }, { .name = "ldo1", }, /* standby */ { .name = "ldo2", }, { .name = "ldo3", }, { .name = "ldo4", }, }; static int ltc3589_parse_regulators_dt(struct ltc3589 *ltc3589) { struct device *dev = ltc3589->dev; struct device_node *node; int i, ret; node = of_get_child_by_name(dev->of_node, "regulators"); if (!node) { dev_err(dev, "regulators node not found\n"); return -EINVAL; } ret = of_regulator_match(dev, node, ltc3589_matches, ARRAY_SIZE(ltc3589_matches)); of_node_put(node); if (ret < 0) { dev_err(dev, "Error parsing regulator init data: %d\n", ret); return ret; } if (ret != LTC3589_NUM_REGULATORS) { dev_err(dev, "Only %d regulators described in device tree\n", ret); return -EINVAL; } /* Parse feedback voltage dividers. LDO3 and LDO4 don't have them */ for (i = 0; i < LTC3589_LDO3; i++) { struct ltc3589_regulator *desc = <c3589->regulator_descs[i]; struct device_node *np = ltc3589_matches[i].of_node; u32 vdiv[2]; ret = of_property_read_u32_array(np, "lltc,fb-voltage-divider", vdiv, 2); if (ret) { dev_err(dev, "Failed to parse voltage divider: %d\n", ret); return ret; } desc->r1 = vdiv[0]; desc->r2 = vdiv[1]; } return 0; } static inline struct regulator_init_data *match_init_data(int index) { return ltc3589_matches[index].init_data; } static inline struct device_node *match_of_node(int index) { return ltc3589_matches[index].of_node; } #else static inline int ltc3589_parse_regulators_dt(struct ltc3589 *ltc3589) { return 0; } static inline struct regulator_init_data *match_init_data(int index) { return NULL; } static inline struct device_node *match_of_node(int index) { return NULL; } #endif static bool ltc3589_writeable_reg(struct device *dev, unsigned int reg) { switch (reg) { case LTC3589_IRQSTAT: case LTC3589_SCR1: case LTC3589_OVEN: case LTC3589_SCR2: case LTC3589_VCCR: case LTC3589_CLIRQ: case LTC3589_B1DTV1: case LTC3589_B1DTV2: case LTC3589_VRRCR: case LTC3589_B2DTV1: case LTC3589_B2DTV2: case LTC3589_B3DTV1: case LTC3589_B3DTV2: case LTC3589_L2DTV1: case LTC3589_L2DTV2: return true; } return false; } static bool ltc3589_readable_reg(struct device *dev, unsigned int reg) { switch (reg) { case LTC3589_IRQSTAT: case LTC3589_SCR1: case LTC3589_OVEN: case LTC3589_SCR2: case LTC3589_PGSTAT: case LTC3589_VCCR: case LTC3589_B1DTV1: case LTC3589_B1DTV2: case LTC3589_VRRCR: case LTC3589_B2DTV1: case LTC3589_B2DTV2: case LTC3589_B3DTV1: case LTC3589_B3DTV2: case LTC3589_L2DTV1: case LTC3589_L2DTV2: return true; } return false; } static bool ltc3589_volatile_reg(struct device *dev, unsigned int reg) { switch (reg) { case LTC3589_IRQSTAT: case LTC3589_PGSTAT: case LTC3589_VCCR: return true; } return false; } static const struct reg_default ltc3589_reg_defaults[] = { { LTC3589_SCR1, 0x00 }, { LTC3589_OVEN, 0x00 }, { LTC3589_SCR2, 0x00 }, { LTC3589_VCCR, 0x00 }, { LTC3589_B1DTV1, 0x19 }, { LTC3589_B1DTV2, 0x19 }, { LTC3589_VRRCR, 0xff }, { LTC3589_B2DTV1, 0x19 }, { LTC3589_B2DTV2, 0x19 }, { LTC3589_B3DTV1, 0x19 }, { LTC3589_B3DTV2, 0x19 }, { LTC3589_L2DTV1, 0x19 }, { LTC3589_L2DTV2, 0x19 }, }; static const struct regmap_config ltc3589_regmap_config = { .reg_bits = 8, .val_bits = 8, .writeable_reg = ltc3589_writeable_reg, .readable_reg = ltc3589_readable_reg, .volatile_reg = ltc3589_volatile_reg, .max_register = LTC3589_L2DTV2, .reg_defaults = ltc3589_reg_defaults, .num_reg_defaults = ARRAY_SIZE(ltc3589_reg_defaults), .use_single_read = true, .use_single_write = true, .cache_type = REGCACHE_RBTREE, }; static irqreturn_t ltc3589_isr(int irq, void *dev_id) { struct ltc3589 *ltc3589 = dev_id; unsigned int i, irqstat, event; regmap_read(ltc3589->regmap, LTC3589_IRQSTAT, &irqstat); if (irqstat & LTC3589_IRQSTAT_THERMAL_WARN) { event = REGULATOR_EVENT_OVER_TEMP; for (i = 0; i < LTC3589_NUM_REGULATORS; i++) regulator_notifier_call_chain(ltc3589->regulators[i], event, NULL); } if (irqstat & LTC3589_IRQSTAT_UNDERVOLT_WARN) { event = REGULATOR_EVENT_UNDER_VOLTAGE; for (i = 0; i < LTC3589_NUM_REGULATORS; i++) regulator_notifier_call_chain(ltc3589->regulators[i], event, NULL); } /* Clear warning condition */ regmap_write(ltc3589->regmap, LTC3589_CLIRQ, 0); return IRQ_HANDLED; } static inline unsigned int ltc3589_scale(unsigned int uV, u32 r1, u32 r2) { uint64_t tmp; if (uV == 0) return 0; tmp = (uint64_t)uV * r1; do_div(tmp, r2); return uV + (unsigned int)tmp; } static void ltc3589_apply_fb_voltage_divider(struct ltc3589_regulator *rdesc) { struct regulator_desc *desc = &rdesc->desc; if (!rdesc->r1 || !rdesc->r2) return; desc->min_uV = ltc3589_scale(desc->min_uV, rdesc->r1, rdesc->r2); desc->uV_step = ltc3589_scale(desc->uV_step, rdesc->r1, rdesc->r2); desc->fixed_uV = ltc3589_scale(desc->fixed_uV, rdesc->r1, rdesc->r2); } static int ltc3589_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct device *dev = &client->dev; struct ltc3589_regulator *descs; struct ltc3589 *ltc3589; int i, ret; ltc3589 = devm_kzalloc(dev, sizeof(*ltc3589), GFP_KERNEL); if (!ltc3589) return -ENOMEM; i2c_set_clientdata(client, ltc3589); if (client->dev.of_node) ltc3589->variant = (enum ltc3589_variant) of_device_get_match_data(&client->dev); else ltc3589->variant = id->driver_data; ltc3589->dev = dev; descs = ltc3589->regulator_descs; memcpy(descs, ltc3589_regulators, sizeof(ltc3589_regulators)); if (ltc3589->variant == LTC3589) { descs[LTC3589_LDO3].desc.fixed_uV = 1800000; descs[LTC3589_LDO4].desc.volt_table = ltc3589_ldo4; } else { descs[LTC3589_LDO3].desc.fixed_uV = 2800000; descs[LTC3589_LDO4].desc.volt_table = ltc3589_12_ldo4; } ltc3589->regmap = devm_regmap_init_i2c(client, <c3589_regmap_config); if (IS_ERR(ltc3589->regmap)) { ret = PTR_ERR(ltc3589->regmap); dev_err(dev, "failed to initialize regmap: %d\n", ret); return ret; } ret = ltc3589_parse_regulators_dt(ltc3589); if (ret) return ret; for (i = 0; i < LTC3589_NUM_REGULATORS; i++) { struct ltc3589_regulator *rdesc = <c3589->regulator_descs[i]; struct regulator_desc *desc = &rdesc->desc; struct regulator_init_data *init_data; struct regulator_config config = { }; init_data = match_init_data(i); if (i < LTC3589_LDO3) ltc3589_apply_fb_voltage_divider(rdesc); config.dev = dev; config.init_data = init_data; config.driver_data = ltc3589; config.of_node = match_of_node(i); ltc3589->regulators[i] = devm_regulator_register(dev, desc, &config); if (IS_ERR(ltc3589->regulators[i])) { ret = PTR_ERR(ltc3589->regulators[i]); dev_err(dev, "failed to register regulator %s: %d\n", desc->name, ret); return ret; } } if (client->irq) { ret = devm_request_threaded_irq(dev, client->irq, NULL, ltc3589_isr, IRQF_TRIGGER_LOW | IRQF_ONESHOT, client->name, ltc3589); if (ret) { dev_err(dev, "Failed to request IRQ: %d\n", ret); return ret; } } return 0; } static const struct i2c_device_id ltc3589_i2c_id[] = { { "ltc3589", LTC3589 }, { "ltc3589-1", LTC3589_1 }, { "ltc3589-2", LTC3589_2 }, { } }; MODULE_DEVICE_TABLE(i2c, ltc3589_i2c_id); static const struct of_device_id ltc3589_of_match[] = { { .compatible = "lltc,ltc3589", .data = (void *)LTC3589, }, { .compatible = "lltc,ltc3589-1", .data = (void *)LTC3589_1, }, { .compatible = "lltc,ltc3589-2", .data = (void *)LTC3589_2, }, { }, }; MODULE_DEVICE_TABLE(of, ltc3589_of_match); static struct i2c_driver ltc3589_driver = { .driver = { .name = DRIVER_NAME, .of_match_table = of_match_ptr(ltc3589_of_match), }, .probe = ltc3589_probe, .id_table = ltc3589_i2c_id, }; module_i2c_driver(ltc3589_driver); MODULE_AUTHOR("Philipp Zabel <p.zabel@pengutronix.de>"); MODULE_DESCRIPTION("Regulator driver for Linear Technology LTC3589(-1,2)"); MODULE_LICENSE("GPL v2");
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