| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Javier Martinez Canillas | 1987 | 96.60% | 9 | 56.25% |
| Krzysztof Kozlowski | 61 | 2.97% | 4 | 25.00% |
| Bhumika Goyal | 5 | 0.24% | 1 | 6.25% |
| Paul Gortmaker | 3 | 0.15% | 1 | 6.25% |
| Axel Lin | 1 | 0.05% | 1 | 6.25% |
| Total | 2057 | 16 |
// SPDX-License-Identifier: GPL-2.0+ // // max77802.c - Regulator driver for the Maxim 77802 // // Copyright (C) 2013-2014 Google, Inc // Simon Glass <sjg@chromium.org> // // Copyright (C) 2012 Samsung Electronics // Chiwoong Byun <woong.byun@samsung.com> // Jonghwa Lee <jonghwa3.lee@samsung.com> // // This driver is based on max8997.c #include <linux/kernel.h> #include <linux/bug.h> #include <linux/err.h> #include <linux/gpio.h> #include <linux/slab.h> #include <linux/gpio/consumer.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/regulator/of_regulator.h> #include <linux/mfd/max77686.h> #include <linux/mfd/max77686-private.h> #include <dt-bindings/regulator/maxim,max77802.h> /* Default ramp delay in case it is not manually set */ #define MAX77802_RAMP_DELAY 100000 /* uV/us */ #define MAX77802_OPMODE_SHIFT_LDO 6 #define MAX77802_OPMODE_BUCK234_SHIFT 4 #define MAX77802_OPMODE_MASK 0x3 #define MAX77802_VSEL_MASK 0x3F #define MAX77802_DVS_VSEL_MASK 0xFF #define MAX77802_RAMP_RATE_MASK_2BIT 0xC0 #define MAX77802_RAMP_RATE_SHIFT_2BIT 6 #define MAX77802_RAMP_RATE_MASK_4BIT 0xF0 #define MAX77802_RAMP_RATE_SHIFT_4BIT 4 #define MAX77802_STATUS_OFF 0x0 #define MAX77802_OFF_PWRREQ 0x1 #define MAX77802_LP_PWRREQ 0x2 /* MAX77802 has two register formats: 2-bit and 4-bit */ static const unsigned int ramp_table_77802_2bit[] = { 12500, 25000, 50000, 100000, }; static unsigned int ramp_table_77802_4bit[] = { 1000, 2000, 3030, 4000, 5000, 5880, 7140, 8330, 9090, 10000, 11110, 12500, 16670, 25000, 50000, 100000, }; struct max77802_regulator_prv { /* Array indexed by regulator id */ unsigned int opmode[MAX77802_REG_MAX]; }; static inline unsigned int max77802_map_mode(unsigned int mode) { return mode == MAX77802_OPMODE_NORMAL ? REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY; } static int max77802_get_opmode_shift(int id) { if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 && id <= MAX77802_BUCK10)) return 0; if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4) return MAX77802_OPMODE_BUCK234_SHIFT; if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35) return MAX77802_OPMODE_SHIFT_LDO; return -EINVAL; } /** * max77802_set_suspend_disable - Disable the regulator during system suspend * @rdev: regulator to mark as disabled * * All regulators expect LDO 1, 3, 20 and 21 support OFF by PWRREQ. * Configure the regulator so the PMIC will turn it OFF during system suspend. */ static int max77802_set_suspend_disable(struct regulator_dev *rdev) { unsigned int val = MAX77802_OFF_PWRREQ; struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); int id = rdev_get_id(rdev); int shift = max77802_get_opmode_shift(id); max77802->opmode[id] = val; return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, rdev->desc->enable_mask, val << shift); } /* * Some LDOs support Low Power Mode while the system is running. * * LDOs 1, 3, 20, 21. */ static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode) { struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); int id = rdev_get_id(rdev); unsigned int val; int shift = max77802_get_opmode_shift(id); switch (mode) { case REGULATOR_MODE_STANDBY: val = MAX77802_OPMODE_LP; /* ON in Low Power Mode */ break; case REGULATOR_MODE_NORMAL: val = MAX77802_OPMODE_NORMAL; /* ON in Normal Mode */ break; default: dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", rdev->desc->name, mode); return -EINVAL; } max77802->opmode[id] = val; return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, rdev->desc->enable_mask, val << shift); } static unsigned max77802_get_mode(struct regulator_dev *rdev) { struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); int id = rdev_get_id(rdev); return max77802_map_mode(max77802->opmode[id]); } /** * max77802_set_suspend_mode - set regulator opmode when the system is suspended * @rdev: regulator to change mode * @mode: operating mode to be set * * Will set the operating mode for the regulators during system suspend. * This function is valid for the three different enable control logics: * * Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35) * Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21) * Enable Control Logic3 by PWRREQ (LDO 3) * * If setting the regulator mode fails, the function only warns but does * not return an error code to avoid the regulator core to stop setting * the operating mode for the remaining regulators. */ static int max77802_set_suspend_mode(struct regulator_dev *rdev, unsigned int mode) { struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); int id = rdev_get_id(rdev); unsigned int val; int shift = max77802_get_opmode_shift(id); /* * If the regulator has been disabled for suspend * then is invalid to try setting a suspend mode. */ if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) { dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n", rdev->desc->name, mode); return 0; } switch (mode) { case REGULATOR_MODE_STANDBY: /* * If the regulator opmode is normal then enable * ON in Low Power Mode by PWRREQ. If the mode is * already Low Power then no action is required. */ if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL) val = MAX77802_LP_PWRREQ; else return 0; break; case REGULATOR_MODE_NORMAL: /* * If the regulator operating mode is Low Power then * normal is not a valid opmode in suspend. If the * mode is already normal then no action is required. */ if (max77802->opmode[id] == MAX77802_OPMODE_LP) dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n", rdev->desc->name, mode); return 0; default: dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", rdev->desc->name, mode); return -EINVAL; } return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, rdev->desc->enable_mask, val << shift); } static int max77802_enable(struct regulator_dev *rdev) { struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); int id = rdev_get_id(rdev); int shift = max77802_get_opmode_shift(id); if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) max77802->opmode[id] = MAX77802_OPMODE_NORMAL; return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, rdev->desc->enable_mask, max77802->opmode[id] << shift); } static int max77802_find_ramp_value(struct regulator_dev *rdev, const unsigned int limits[], int size, unsigned int ramp_delay) { int i; for (i = 0; i < size; i++) { if (ramp_delay <= limits[i]) return i; } /* Use maximum value for no ramp control */ dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n", rdev->desc->name, ramp_delay); return size - 1; } /* Used for BUCKs 2-4 */ static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev, int ramp_delay) { int id = rdev_get_id(rdev); unsigned int ramp_value; if (id > MAX77802_BUCK4) { dev_warn(&rdev->dev, "%s: regulator: ramp delay not supported\n", rdev->desc->name); return -EINVAL; } ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit, ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay); return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, MAX77802_RAMP_RATE_MASK_2BIT, ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT); } /* For BUCK1, 6 */ static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev, int ramp_delay) { unsigned int ramp_value; ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit, ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay); return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, MAX77802_RAMP_RATE_MASK_4BIT, ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT); } /* * LDOs 2, 4-19, 22-35 */ static const struct regulator_ops max77802_ldo_ops_logic1 = { .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, .is_enabled = regulator_is_enabled_regmap, .enable = max77802_enable, .disable = regulator_disable_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .set_voltage_time_sel = regulator_set_voltage_time_sel, .set_suspend_disable = max77802_set_suspend_disable, .set_suspend_mode = max77802_set_suspend_mode, }; /* * LDOs 1, 20, 21, 3 */ static const struct regulator_ops max77802_ldo_ops_logic2 = { .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, .is_enabled = regulator_is_enabled_regmap, .enable = max77802_enable, .disable = regulator_disable_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .set_voltage_time_sel = regulator_set_voltage_time_sel, .set_mode = max77802_set_mode, .get_mode = max77802_get_mode, .set_suspend_mode = max77802_set_suspend_mode, }; /* BUCKS 1, 6 */ static const struct regulator_ops max77802_buck_16_dvs_ops = { .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, .is_enabled = regulator_is_enabled_regmap, .enable = max77802_enable, .disable = regulator_disable_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .set_voltage_time_sel = regulator_set_voltage_time_sel, .set_ramp_delay = max77802_set_ramp_delay_4bit, .set_suspend_disable = max77802_set_suspend_disable, }; /* BUCKs 2-4 */ static const struct regulator_ops max77802_buck_234_ops = { .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, .is_enabled = regulator_is_enabled_regmap, .enable = max77802_enable, .disable = regulator_disable_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .set_voltage_time_sel = regulator_set_voltage_time_sel, .set_ramp_delay = max77802_set_ramp_delay_2bit, .set_suspend_disable = max77802_set_suspend_disable, .set_suspend_mode = max77802_set_suspend_mode, }; /* BUCKs 5, 7-10 */ static const struct regulator_ops max77802_buck_dvs_ops = { .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, .is_enabled = regulator_is_enabled_regmap, .enable = max77802_enable, .disable = regulator_disable_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .set_voltage_time_sel = regulator_set_voltage_time_sel, .set_ramp_delay = max77802_set_ramp_delay_2bit, .set_suspend_disable = max77802_set_suspend_disable, }; /* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */ #define regulator_77802_desc_p_ldo(num, supply, log) { \ .name = "LDO"#num, \ .of_match = of_match_ptr("LDO"#num), \ .regulators_node = of_match_ptr("regulators"), \ .id = MAX77802_LDO##num, \ .supply_name = "inl"#supply, \ .ops = &max77802_ldo_ops_logic##log, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .min_uV = 800000, \ .uV_step = 50000, \ .ramp_delay = MAX77802_RAMP_DELAY, \ .n_voltages = 1 << 6, \ .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ .vsel_mask = MAX77802_VSEL_MASK, \ .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ .of_map_mode = max77802_map_mode, \ } /* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */ #define regulator_77802_desc_n_ldo(num, supply, log) { \ .name = "LDO"#num, \ .of_match = of_match_ptr("LDO"#num), \ .regulators_node = of_match_ptr("regulators"), \ .id = MAX77802_LDO##num, \ .supply_name = "inl"#supply, \ .ops = &max77802_ldo_ops_logic##log, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .min_uV = 800000, \ .uV_step = 25000, \ .ramp_delay = MAX77802_RAMP_DELAY, \ .n_voltages = 1 << 6, \ .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ .vsel_mask = MAX77802_VSEL_MASK, \ .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ .of_map_mode = max77802_map_mode, \ } /* BUCKs 1, 6 */ #define regulator_77802_desc_16_buck(num) { \ .name = "BUCK"#num, \ .of_match = of_match_ptr("BUCK"#num), \ .regulators_node = of_match_ptr("regulators"), \ .id = MAX77802_BUCK##num, \ .supply_name = "inb"#num, \ .ops = &max77802_buck_16_dvs_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .min_uV = 612500, \ .uV_step = 6250, \ .ramp_delay = MAX77802_RAMP_DELAY, \ .n_voltages = 1 << 8, \ .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ .vsel_mask = MAX77802_DVS_VSEL_MASK, \ .enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \ .enable_mask = MAX77802_OPMODE_MASK, \ .of_map_mode = max77802_map_mode, \ } /* BUCKS 2-4 */ #define regulator_77802_desc_234_buck(num) { \ .name = "BUCK"#num, \ .of_match = of_match_ptr("BUCK"#num), \ .regulators_node = of_match_ptr("regulators"), \ .id = MAX77802_BUCK##num, \ .supply_name = "inb"#num, \ .ops = &max77802_buck_234_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .min_uV = 600000, \ .uV_step = 6250, \ .ramp_delay = MAX77802_RAMP_DELAY, \ .n_voltages = 0x91, \ .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ .vsel_mask = MAX77802_DVS_VSEL_MASK, \ .enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \ .enable_mask = MAX77802_OPMODE_MASK << \ MAX77802_OPMODE_BUCK234_SHIFT, \ .of_map_mode = max77802_map_mode, \ } /* BUCK 5 */ #define regulator_77802_desc_buck5(num) { \ .name = "BUCK"#num, \ .of_match = of_match_ptr("BUCK"#num), \ .regulators_node = of_match_ptr("regulators"), \ .id = MAX77802_BUCK##num, \ .supply_name = "inb"#num, \ .ops = &max77802_buck_dvs_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .min_uV = 750000, \ .uV_step = 50000, \ .ramp_delay = MAX77802_RAMP_DELAY, \ .n_voltages = 1 << 6, \ .vsel_reg = MAX77802_REG_BUCK5OUT, \ .vsel_mask = MAX77802_VSEL_MASK, \ .enable_reg = MAX77802_REG_BUCK5CTRL, \ .enable_mask = MAX77802_OPMODE_MASK, \ .of_map_mode = max77802_map_mode, \ } /* BUCKs 7-10 */ #define regulator_77802_desc_buck7_10(num) { \ .name = "BUCK"#num, \ .of_match = of_match_ptr("BUCK"#num), \ .regulators_node = of_match_ptr("regulators"), \ .id = MAX77802_BUCK##num, \ .supply_name = "inb"#num, \ .ops = &max77802_buck_dvs_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .min_uV = 750000, \ .uV_step = 50000, \ .ramp_delay = MAX77802_RAMP_DELAY, \ .n_voltages = 1 << 6, \ .vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \ .vsel_mask = MAX77802_VSEL_MASK, \ .enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \ .enable_mask = MAX77802_OPMODE_MASK, \ .of_map_mode = max77802_map_mode, \ } static const struct regulator_desc regulators[] = { regulator_77802_desc_16_buck(1), regulator_77802_desc_234_buck(2), regulator_77802_desc_234_buck(3), regulator_77802_desc_234_buck(4), regulator_77802_desc_buck5(5), regulator_77802_desc_16_buck(6), regulator_77802_desc_buck7_10(7), regulator_77802_desc_buck7_10(8), regulator_77802_desc_buck7_10(9), regulator_77802_desc_buck7_10(10), regulator_77802_desc_n_ldo(1, 10, 2), regulator_77802_desc_n_ldo(2, 10, 1), regulator_77802_desc_p_ldo(3, 3, 2), regulator_77802_desc_p_ldo(4, 6, 1), regulator_77802_desc_p_ldo(5, 3, 1), regulator_77802_desc_p_ldo(6, 3, 1), regulator_77802_desc_p_ldo(7, 3, 1), regulator_77802_desc_n_ldo(8, 1, 1), regulator_77802_desc_p_ldo(9, 5, 1), regulator_77802_desc_p_ldo(10, 4, 1), regulator_77802_desc_p_ldo(11, 4, 1), regulator_77802_desc_p_ldo(12, 9, 1), regulator_77802_desc_p_ldo(13, 4, 1), regulator_77802_desc_p_ldo(14, 4, 1), regulator_77802_desc_n_ldo(15, 1, 1), regulator_77802_desc_n_ldo(17, 2, 1), regulator_77802_desc_p_ldo(18, 7, 1), regulator_77802_desc_p_ldo(19, 5, 1), regulator_77802_desc_p_ldo(20, 7, 2), regulator_77802_desc_p_ldo(21, 6, 2), regulator_77802_desc_p_ldo(23, 9, 1), regulator_77802_desc_p_ldo(24, 6, 1), regulator_77802_desc_p_ldo(25, 9, 1), regulator_77802_desc_p_ldo(26, 9, 1), regulator_77802_desc_n_ldo(27, 2, 1), regulator_77802_desc_p_ldo(28, 7, 1), regulator_77802_desc_p_ldo(29, 7, 1), regulator_77802_desc_n_ldo(30, 2, 1), regulator_77802_desc_p_ldo(32, 9, 1), regulator_77802_desc_p_ldo(33, 6, 1), regulator_77802_desc_p_ldo(34, 9, 1), regulator_77802_desc_n_ldo(35, 2, 1), }; static int max77802_pmic_probe(struct platform_device *pdev) { struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); struct max77802_regulator_prv *max77802; int i, val; struct regulator_config config = { }; max77802 = devm_kzalloc(&pdev->dev, sizeof(struct max77802_regulator_prv), GFP_KERNEL); if (!max77802) return -ENOMEM; config.dev = iodev->dev; config.regmap = iodev->regmap; config.driver_data = max77802; platform_set_drvdata(pdev, max77802); for (i = 0; i < MAX77802_REG_MAX; i++) { struct regulator_dev *rdev; int id = regulators[i].id; int shift = max77802_get_opmode_shift(id); int ret; ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val); if (ret < 0) { dev_warn(&pdev->dev, "cannot read current mode for %d\n", i); val = MAX77802_OPMODE_NORMAL; } else { val = val >> shift & MAX77802_OPMODE_MASK; } /* * If the regulator is disabled and the system warm rebooted, * the hardware reports OFF as the regulator operating mode. * Default to operating mode NORMAL in that case. */ if (val == MAX77802_STATUS_OFF) max77802->opmode[id] = MAX77802_OPMODE_NORMAL; else max77802->opmode[id] = val; rdev = devm_regulator_register(&pdev->dev, ®ulators[i], &config); if (IS_ERR(rdev)) { ret = PTR_ERR(rdev); dev_err(&pdev->dev, "regulator init failed for %d: %d\n", i, ret); return ret; } } return 0; } static const struct platform_device_id max77802_pmic_id[] = { {"max77802-pmic", 0}, { }, }; MODULE_DEVICE_TABLE(platform, max77802_pmic_id); static struct platform_driver max77802_pmic_driver = { .driver = { .name = "max77802-pmic", }, .probe = max77802_pmic_probe, .id_table = max77802_pmic_id, }; module_platform_driver(max77802_pmic_driver); MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver"); MODULE_AUTHOR("Simon Glass <sjg@chromium.org>"); MODULE_LICENSE("GPL");
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