/* * wm8350.c -- Voltage and current regulation for the Wolfson WM8350 PMIC * * Copyright 2007, 2008 Wolfson Microelectronics PLC. * * Author: Liam Girdwood * linux@wolfsonmicro.com * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/bitops.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/mfd/wm8350/core.h> #include <linux/mfd/wm8350/pmic.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> /* Microamps */ static const int isink_cur[] = { 4, 5, 6, 7, 8, 10, 11, 14, 16, 19, 23, 27, 32, 39, 46, 54, 65, 77, 92, 109, 130, 154, 183, 218, 259, 308, 367, 436, 518, 616, 733, 872, 1037, 1233, 1466, 1744, 2073, 2466, 2933, 3487, 4147, 4932, 5865, 6975, 8294, 9864, 11730, 13949, 16589, 19728, 23460, 27899, 33178, 39455, 46920, 55798, 66355, 78910, 93840, 111596, 132710, 157820, 187681, 223191 }; static int get_isink_val(int min_uA, int max_uA, u16 *setting) { int i; for (i = ARRAY_SIZE(isink_cur) - 1; i >= 0; i--) { if (min_uA <= isink_cur[i] && max_uA >= isink_cur[i]) { *setting = i; return 0; } } return -EINVAL; } static inline int wm8350_ldo_val_to_mvolts(unsigned int val) { if (val < 16) return (val * 50) + 900; else return ((val - 16) * 100) + 1800; } static inline unsigned int wm8350_ldo_mvolts_to_val(int mV) { if (mV < 1800) return (mV - 900) / 50; else return ((mV - 1800) / 100) + 16; } static inline int wm8350_dcdc_val_to_mvolts(unsigned int val) { return (val * 25) + 850; } static inline unsigned int wm8350_dcdc_mvolts_to_val(int mV) { return (mV - 850) / 25; } static int wm8350_isink_set_current(struct regulator_dev *rdev, int min_uA, int max_uA) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int isink = rdev_get_id(rdev); u16 val, setting; int ret; ret = get_isink_val(min_uA, max_uA, &setting); if (ret != 0) return ret; switch (isink) { case WM8350_ISINK_A: val = wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_A) & ~WM8350_CS1_ISEL_MASK; wm8350_reg_write(wm8350, WM8350_CURRENT_SINK_DRIVER_A, val | setting); break; case WM8350_ISINK_B: val = wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_B) & ~WM8350_CS1_ISEL_MASK; wm8350_reg_write(wm8350, WM8350_CURRENT_SINK_DRIVER_B, val | setting); break; default: return -EINVAL; } return 0; } static int wm8350_isink_get_current(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int isink = rdev_get_id(rdev); u16 val; switch (isink) { case WM8350_ISINK_A: val = wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_A) & WM8350_CS1_ISEL_MASK; break; case WM8350_ISINK_B: val = wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_B) & WM8350_CS1_ISEL_MASK; break; default: return 0; } return (isink_cur[val] + 50) / 100; } /* turn on ISINK followed by DCDC */ static int wm8350_isink_enable(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int isink = rdev_get_id(rdev); switch (isink) { case WM8350_ISINK_A: switch (wm8350->pmic.isink_A_dcdc) { case WM8350_DCDC_2: case WM8350_DCDC_5: wm8350_set_bits(wm8350, WM8350_POWER_MGMT_7, WM8350_CS1_ENA); wm8350_set_bits(wm8350, WM8350_CSA_FLASH_CONTROL, WM8350_CS1_DRIVE); wm8350_set_bits(wm8350, WM8350_DCDC_LDO_REQUESTED, 1 << (wm8350->pmic.isink_A_dcdc - WM8350_DCDC_1)); break; default: return -EINVAL; } break; case WM8350_ISINK_B: switch (wm8350->pmic.isink_B_dcdc) { case WM8350_DCDC_2: case WM8350_DCDC_5: wm8350_set_bits(wm8350, WM8350_POWER_MGMT_7, WM8350_CS2_ENA); wm8350_set_bits(wm8350, WM8350_CSB_FLASH_CONTROL, WM8350_CS2_DRIVE); wm8350_set_bits(wm8350, WM8350_DCDC_LDO_REQUESTED, 1 << (wm8350->pmic.isink_B_dcdc - WM8350_DCDC_1)); break; default: return -EINVAL; } break; default: return -EINVAL; } return 0; } static int wm8350_isink_disable(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int isink = rdev_get_id(rdev); switch (isink) { case WM8350_ISINK_A: switch (wm8350->pmic.isink_A_dcdc) { case WM8350_DCDC_2: case WM8350_DCDC_5: wm8350_clear_bits(wm8350, WM8350_DCDC_LDO_REQUESTED, 1 << (wm8350->pmic.isink_A_dcdc - WM8350_DCDC_1)); wm8350_clear_bits(wm8350, WM8350_POWER_MGMT_7, WM8350_CS1_ENA); break; default: return -EINVAL; } break; case WM8350_ISINK_B: switch (wm8350->pmic.isink_B_dcdc) { case WM8350_DCDC_2: case WM8350_DCDC_5: wm8350_clear_bits(wm8350, WM8350_DCDC_LDO_REQUESTED, 1 << (wm8350->pmic.isink_B_dcdc - WM8350_DCDC_1)); wm8350_clear_bits(wm8350, WM8350_POWER_MGMT_7, WM8350_CS2_ENA); break; default: return -EINVAL; } break; default: return -EINVAL; } return 0; } static int wm8350_isink_is_enabled(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int isink = rdev_get_id(rdev); switch (isink) { case WM8350_ISINK_A: return wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_A) & 0x8000; case WM8350_ISINK_B: return wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_B) & 0x8000; } return -EINVAL; } int wm8350_isink_set_flash(struct wm8350 *wm8350, int isink, u16 mode, u16 trigger, u16 duration, u16 on_ramp, u16 off_ramp, u16 drive) { switch (isink) { case WM8350_ISINK_A: wm8350_reg_write(wm8350, WM8350_CSA_FLASH_CONTROL, (mode ? WM8350_CS1_FLASH_MODE : 0) | (trigger ? WM8350_CS1_TRIGSRC : 0) | duration | on_ramp | off_ramp | drive); break; case WM8350_ISINK_B: wm8350_reg_write(wm8350, WM8350_CSB_FLASH_CONTROL, (mode ? WM8350_CS2_FLASH_MODE : 0) | (trigger ? WM8350_CS2_TRIGSRC : 0) | duration | on_ramp | off_ramp | drive); break; default: return -EINVAL; } return 0; } EXPORT_SYMBOL_GPL(wm8350_isink_set_flash); static int wm8350_dcdc_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int volt_reg, dcdc = rdev_get_id(rdev), mV, min_mV = min_uV / 1000, max_mV = max_uV / 1000; u16 val; if (min_mV < 850 || min_mV > 4025) return -EINVAL; if (max_mV < 850 || max_mV > 4025) return -EINVAL; /* step size is 25mV */ mV = (min_mV - 826) / 25; if (wm8350_dcdc_val_to_mvolts(mV) > max_mV) return -EINVAL; BUG_ON(wm8350_dcdc_val_to_mvolts(mV) < min_mV); switch (dcdc) { case WM8350_DCDC_1: volt_reg = WM8350_DCDC1_CONTROL; break; case WM8350_DCDC_3: volt_reg = WM8350_DCDC3_CONTROL; break; case WM8350_DCDC_4: volt_reg = WM8350_DCDC4_CONTROL; break; case WM8350_DCDC_6: volt_reg = WM8350_DCDC6_CONTROL; break; case WM8350_DCDC_2: case WM8350_DCDC_5: default: return -EINVAL; } /* all DCDCs have same mV bits */ val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_DC1_VSEL_MASK; wm8350_reg_write(wm8350, volt_reg, val | mV); return 0; } static int wm8350_dcdc_get_voltage(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int volt_reg, dcdc = rdev_get_id(rdev); u16 val; switch (dcdc) { case WM8350_DCDC_1: volt_reg = WM8350_DCDC1_CONTROL; break; case WM8350_DCDC_3: volt_reg = WM8350_DCDC3_CONTROL; break; case WM8350_DCDC_4: volt_reg = WM8350_DCDC4_CONTROL; break; case WM8350_DCDC_6: volt_reg = WM8350_DCDC6_CONTROL; break; case WM8350_DCDC_2: case WM8350_DCDC_5: default: return -EINVAL; } /* all DCDCs have same mV bits */ val = wm8350_reg_read(wm8350, volt_reg) & WM8350_DC1_VSEL_MASK; return wm8350_dcdc_val_to_mvolts(val) * 1000; } static int wm8350_dcdc_set_suspend_voltage(struct regulator_dev *rdev, int uV) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int volt_reg, mV = uV / 1000, dcdc = rdev_get_id(rdev); u16 val; dev_dbg(wm8350->dev, "%s %d mV %d\n", __func__, dcdc, mV); if (mV && (mV < 850 || mV > 4025)) { dev_err(wm8350->dev, "DCDC%d suspend voltage %d mV out of range\n", dcdc, mV); return -EINVAL; } if (mV == 0) mV = 850; switch (dcdc) { case WM8350_DCDC_1: volt_reg = WM8350_DCDC1_LOW_POWER; break; case WM8350_DCDC_3: volt_reg = WM8350_DCDC3_LOW_POWER; break; case WM8350_DCDC_4: volt_reg = WM8350_DCDC4_LOW_POWER; break; case WM8350_DCDC_6: volt_reg = WM8350_DCDC6_LOW_POWER; break; case WM8350_DCDC_2: case WM8350_DCDC_5: default: return -EINVAL; } /* all DCDCs have same mV bits */ val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_DC1_VSEL_MASK; wm8350_reg_write(wm8350, volt_reg, val | wm8350_dcdc_mvolts_to_val(mV)); return 0; } static int wm8350_dcdc_set_suspend_enable(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int dcdc = rdev_get_id(rdev); u16 val; switch (dcdc) { case WM8350_DCDC_1: val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER) & ~WM8350_DCDC_HIB_MODE_MASK; wm8350_reg_write(wm8350, WM8350_DCDC1_LOW_POWER, wm8350->pmic.dcdc1_hib_mode); break; case WM8350_DCDC_3: val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER) & ~WM8350_DCDC_HIB_MODE_MASK; wm8350_reg_write(wm8350, WM8350_DCDC3_LOW_POWER, wm8350->pmic.dcdc3_hib_mode); break; case WM8350_DCDC_4: val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER) & ~WM8350_DCDC_HIB_MODE_MASK; wm8350_reg_write(wm8350, WM8350_DCDC4_LOW_POWER, wm8350->pmic.dcdc4_hib_mode); break; case WM8350_DCDC_6: val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER) & ~WM8350_DCDC_HIB_MODE_MASK; wm8350_reg_write(wm8350, WM8350_DCDC6_LOW_POWER, wm8350->pmic.dcdc6_hib_mode); break; case WM8350_DCDC_2: case WM8350_DCDC_5: default: return -EINVAL; } return 0; } static int wm8350_dcdc_set_suspend_disable(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int dcdc = rdev_get_id(rdev); u16 val; switch (dcdc) { case WM8350_DCDC_1: val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER); wm8350->pmic.dcdc1_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK; wm8350_reg_write(wm8350, WM8350_DCDC1_LOW_POWER, WM8350_DCDC_HIB_MODE_DIS); break; case WM8350_DCDC_3: val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER); wm8350->pmic.dcdc3_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK; wm8350_reg_write(wm8350, WM8350_DCDC3_LOW_POWER, WM8350_DCDC_HIB_MODE_DIS); break; case WM8350_DCDC_4: val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER); wm8350->pmic.dcdc4_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK; wm8350_reg_write(wm8350, WM8350_DCDC4_LOW_POWER, WM8350_DCDC_HIB_MODE_DIS); break; case WM8350_DCDC_6: val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER); wm8350->pmic.dcdc6_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK; wm8350_reg_write(wm8350, WM8350_DCDC6_LOW_POWER, WM8350_DCDC_HIB_MODE_DIS); break; case WM8350_DCDC_2: case WM8350_DCDC_5: default: return -EINVAL; } return 0; } static int wm8350_dcdc25_set_suspend_enable(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int dcdc = rdev_get_id(rdev); u16 val; switch (dcdc) { case WM8350_DCDC_2: val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL) & ~WM8350_DC2_HIB_MODE_MASK; wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val | WM8350_DC2_HIB_MODE_ACTIVE); break; case WM8350_DCDC_5: val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL) & ~WM8350_DC2_HIB_MODE_MASK; wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val | WM8350_DC5_HIB_MODE_ACTIVE); break; default: return -EINVAL; } return 0; } static int wm8350_dcdc25_set_suspend_disable(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int dcdc = rdev_get_id(rdev); u16 val; switch (dcdc) { case WM8350_DCDC_2: val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL) & ~WM8350_DC2_HIB_MODE_MASK; wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val | WM8350_DC2_HIB_MODE_DISABLE); break; case WM8350_DCDC_5: val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL) & ~WM8350_DC2_HIB_MODE_MASK; wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val | WM8350_DC2_HIB_MODE_DISABLE); break; default: return -EINVAL; } return 0; } static int wm8350_dcdc_set_suspend_mode(struct regulator_dev *rdev, unsigned int mode) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int dcdc = rdev_get_id(rdev); u16 *hib_mode; switch (dcdc) { case WM8350_DCDC_1: hib_mode = &wm8350->pmic.dcdc1_hib_mode; break; case WM8350_DCDC_3: hib_mode = &wm8350->pmic.dcdc3_hib_mode; break; case WM8350_DCDC_4: hib_mode = &wm8350->pmic.dcdc4_hib_mode; break; case WM8350_DCDC_6: hib_mode = &wm8350->pmic.dcdc6_hib_mode; break; case WM8350_DCDC_2: case WM8350_DCDC_5: default: return -EINVAL; } switch (mode) { case REGULATOR_MODE_NORMAL: *hib_mode = WM8350_DCDC_HIB_MODE_IMAGE; break; case REGULATOR_MODE_IDLE: *hib_mode = WM8350_DCDC_HIB_MODE_STANDBY; break; case REGULATOR_MODE_STANDBY: *hib_mode = WM8350_DCDC_HIB_MODE_LDO_IM; break; default: return -EINVAL; } return 0; } static int wm8350_ldo_set_suspend_voltage(struct regulator_dev *rdev, int uV) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int volt_reg, mV = uV / 1000, ldo = rdev_get_id(rdev); u16 val; dev_dbg(wm8350->dev, "%s %d mV %d\n", __func__, ldo, mV); if (mV < 900 || mV > 3300) { dev_err(wm8350->dev, "LDO%d voltage %d mV out of range\n", ldo, mV); return -EINVAL; } switch (ldo) { case WM8350_LDO_1: volt_reg = WM8350_LDO1_LOW_POWER; break; case WM8350_LDO_2: volt_reg = WM8350_LDO2_LOW_POWER; break; case WM8350_LDO_3: volt_reg = WM8350_LDO3_LOW_POWER; break; case WM8350_LDO_4: volt_reg = WM8350_LDO4_LOW_POWER; break; default: return -EINVAL; } /* all LDOs have same mV bits */ val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_VSEL_MASK; wm8350_reg_write(wm8350, volt_reg, val | wm8350_ldo_mvolts_to_val(mV)); return 0; } static int wm8350_ldo_set_suspend_enable(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int volt_reg, ldo = rdev_get_id(rdev); u16 val; switch (ldo) { case WM8350_LDO_1: volt_reg = WM8350_LDO1_LOW_POWER; break; case WM8350_LDO_2: volt_reg = WM8350_LDO2_LOW_POWER; break; case WM8350_LDO_3: volt_reg = WM8350_LDO3_LOW_POWER; break; case WM8350_LDO_4: volt_reg = WM8350_LDO4_LOW_POWER; break; default: return -EINVAL; } /* all LDOs have same mV bits */ val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_HIB_MODE_MASK; wm8350_reg_write(wm8350, volt_reg, val); return 0; } static int wm8350_ldo_set_suspend_disable(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int volt_reg, ldo = rdev_get_id(rdev); u16 val; switch (ldo) { case WM8350_LDO_1: volt_reg = WM8350_LDO1_LOW_POWER; break; case WM8350_LDO_2: volt_reg = WM8350_LDO2_LOW_POWER; break; case WM8350_LDO_3: volt_reg = WM8350_LDO3_LOW_POWER; break; case WM8350_LDO_4: volt_reg = WM8350_LDO4_LOW_POWER; break; default: return -EINVAL; } /* all LDOs have same mV bits */ val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_HIB_MODE_MASK; wm8350_reg_write(wm8350, volt_reg, WM8350_LDO1_HIB_MODE_DIS); return 0; } static int wm8350_ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int volt_reg, ldo = rdev_get_id(rdev), mV, min_mV = min_uV / 1000, max_mV = max_uV / 1000; u16 val; if (min_mV < 900 || min_mV > 3300) return -EINVAL; if (max_mV < 900 || max_mV > 3300) return -EINVAL; if (min_mV < 1800) { /* step size is 50mV < 1800mV */ mV = (min_mV - 851) / 50; if (wm8350_ldo_val_to_mvolts(mV) > max_mV) return -EINVAL; BUG_ON(wm8350_ldo_val_to_mvolts(mV) < min_mV); } else { /* step size is 100mV > 1800mV */ mV = ((min_mV - 1701) / 100) + 16; if (wm8350_ldo_val_to_mvolts(mV) > max_mV) return -EINVAL; BUG_ON(wm8350_ldo_val_to_mvolts(mV) < min_mV); } switch (ldo) { case WM8350_LDO_1: volt_reg = WM8350_LDO1_CONTROL; break; case WM8350_LDO_2: volt_reg = WM8350_LDO2_CONTROL; break; case WM8350_LDO_3: volt_reg = WM8350_LDO3_CONTROL; break; case WM8350_LDO_4: volt_reg = WM8350_LDO4_CONTROL; break; default: return -EINVAL; } /* all LDOs have same mV bits */ val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_VSEL_MASK; wm8350_reg_write(wm8350, volt_reg, val | mV); return 0; } static int wm8350_ldo_get_voltage(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int volt_reg, ldo = rdev_get_id(rdev); u16 val; switch (ldo) { case WM8350_LDO_1: volt_reg = WM8350_LDO1_CONTROL; break; case WM8350_LDO_2: volt_reg = WM8350_LDO2_CONTROL; break; case WM8350_LDO_3: volt_reg = WM8350_LDO3_CONTROL; break; case WM8350_LDO_4: volt_reg = WM8350_LDO4_CONTROL; break; default: return -EINVAL; } /* all LDOs have same mV bits */ val = wm8350_reg_read(wm8350, volt_reg) & WM8350_LDO1_VSEL_MASK; return wm8350_ldo_val_to_mvolts(val) * 1000; } int wm8350_dcdc_set_slot(struct wm8350 *wm8350, int dcdc, u16 start, u16 stop, u16 fault) { int slot_reg; u16 val; dev_dbg(wm8350->dev, "%s %d start %d stop %d\n", __func__, dcdc, start, stop); /* slot valid ? */ if (start > 15 || stop > 15) return -EINVAL; switch (dcdc) { case WM8350_DCDC_1: slot_reg = WM8350_DCDC1_TIMEOUTS; break; case WM8350_DCDC_2: slot_reg = WM8350_DCDC2_TIMEOUTS; break; case WM8350_DCDC_3: slot_reg = WM8350_DCDC3_TIMEOUTS; break; case WM8350_DCDC_4: slot_reg = WM8350_DCDC4_TIMEOUTS; break; case WM8350_DCDC_5: slot_reg = WM8350_DCDC5_TIMEOUTS; break; case WM8350_DCDC_6: slot_reg = WM8350_DCDC6_TIMEOUTS; break; default: return -EINVAL; } val = wm8350_reg_read(wm8350, slot_reg) & ~(WM8350_DC1_ENSLOT_MASK | WM8350_DC1_SDSLOT_MASK | WM8350_DC1_ERRACT_MASK); wm8350_reg_write(wm8350, slot_reg, val | (start << WM8350_DC1_ENSLOT_SHIFT) | (stop << WM8350_DC1_SDSLOT_SHIFT) | (fault << WM8350_DC1_ERRACT_SHIFT)); return 0; } EXPORT_SYMBOL_GPL(wm8350_dcdc_set_slot); int wm8350_ldo_set_slot(struct wm8350 *wm8350, int ldo, u16 start, u16 stop) { int slot_reg; u16 val; dev_dbg(wm8350->dev, "%s %d start %d stop %d\n", __func__, ldo, start, stop); /* slot valid ? */ if (start > 15 || stop > 15) return -EINVAL; switch (ldo) { case WM8350_LDO_1: slot_reg = WM8350_LDO1_TIMEOUTS; break; case WM8350_LDO_2: slot_reg = WM8350_LDO2_TIMEOUTS; break; case WM8350_LDO_3: slot_reg = WM8350_LDO3_TIMEOUTS; break; case WM8350_LDO_4: slot_reg = WM8350_LDO4_TIMEOUTS; break; default: return -EINVAL; } val = wm8350_reg_read(wm8350, slot_reg) & ~WM8350_LDO1_SDSLOT_MASK; wm8350_reg_write(wm8350, slot_reg, val | ((start << 10) | (stop << 6))); return 0; } EXPORT_SYMBOL_GPL(wm8350_ldo_set_slot); int wm8350_dcdc25_set_mode(struct wm8350 *wm8350, int dcdc, u16 mode, u16 ilim, u16 ramp, u16 feedback) { u16 val; dev_dbg(wm8350->dev, "%s %d mode: %s %s\n", __func__, dcdc, mode ? "normal" : "boost", ilim ? "low" : "normal"); switch (dcdc) { case WM8350_DCDC_2: val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL) & ~(WM8350_DC2_MODE_MASK | WM8350_DC2_ILIM_MASK | WM8350_DC2_RMP_MASK | WM8350_DC2_FBSRC_MASK); wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val | (mode << WM8350_DC2_MODE_SHIFT) | (ilim << WM8350_DC2_ILIM_SHIFT) | (ramp << WM8350_DC2_RMP_SHIFT) | (feedback << WM8350_DC2_FBSRC_SHIFT)); break; case WM8350_DCDC_5: val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL) & ~(WM8350_DC5_MODE_MASK | WM8350_DC5_ILIM_MASK | WM8350_DC5_RMP_MASK | WM8350_DC5_FBSRC_MASK); wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val | (mode << WM8350_DC5_MODE_SHIFT) | (ilim << WM8350_DC5_ILIM_SHIFT) | (ramp << WM8350_DC5_RMP_SHIFT) | (feedback << WM8350_DC5_FBSRC_SHIFT)); break; default: return -EINVAL; } return 0; } EXPORT_SYMBOL_GPL(wm8350_dcdc25_set_mode); static int wm8350_dcdc_enable(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int dcdc = rdev_get_id(rdev); u16 shift; if (dcdc < WM8350_DCDC_1 || dcdc > WM8350_DCDC_6) return -EINVAL; shift = dcdc - WM8350_DCDC_1; wm8350_set_bits(wm8350, WM8350_DCDC_LDO_REQUESTED, 1 << shift); return 0; } static int wm8350_dcdc_disable(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int dcdc = rdev_get_id(rdev); u16 shift; if (dcdc < WM8350_DCDC_1 || dcdc > WM8350_DCDC_6) return -EINVAL; shift = dcdc - WM8350_DCDC_1; wm8350_clear_bits(wm8350, WM8350_DCDC_LDO_REQUESTED, 1 << shift); return 0; } static int wm8350_ldo_enable(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int ldo = rdev_get_id(rdev); u16 shift; if (ldo < WM8350_LDO_1 || ldo > WM8350_LDO_4) return -EINVAL; shift = (ldo - WM8350_LDO_1) + 8; wm8350_set_bits(wm8350, WM8350_DCDC_LDO_REQUESTED, 1 << shift); return 0; } static int wm8350_ldo_disable(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int ldo = rdev_get_id(rdev); u16 shift; if (ldo < WM8350_LDO_1 || ldo > WM8350_LDO_4) return -EINVAL; shift = (ldo - WM8350_LDO_1) + 8; wm8350_clear_bits(wm8350, WM8350_DCDC_LDO_REQUESTED, 1 << shift); return 0; } static int force_continuous_enable(struct wm8350 *wm8350, int dcdc, int enable) { int reg = 0, ret; switch (dcdc) { case WM8350_DCDC_1: reg = WM8350_DCDC1_FORCE_PWM; break; case WM8350_DCDC_3: reg = WM8350_DCDC3_FORCE_PWM; break; case WM8350_DCDC_4: reg = WM8350_DCDC4_FORCE_PWM; break; case WM8350_DCDC_6: reg = WM8350_DCDC6_FORCE_PWM; break; default: return -EINVAL; } if (enable) ret = wm8350_set_bits(wm8350, reg, WM8350_DCDC1_FORCE_PWM_ENA); else ret = wm8350_clear_bits(wm8350, reg, WM8350_DCDC1_FORCE_PWM_ENA); return ret; } static int wm8350_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int dcdc = rdev_get_id(rdev); u16 val; if (dcdc < WM8350_DCDC_1 || dcdc > WM8350_DCDC_6) return -EINVAL; if (dcdc == WM8350_DCDC_2 || dcdc == WM8350_DCDC_5) return -EINVAL; val = 1 << (dcdc - WM8350_DCDC_1); switch (mode) { case REGULATOR_MODE_FAST: /* force continuous mode */ wm8350_set_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val); wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val); force_continuous_enable(wm8350, dcdc, 1); break; case REGULATOR_MODE_NORMAL: /* active / pulse skipping */ wm8350_set_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val); wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val); force_continuous_enable(wm8350, dcdc, 0); break; case REGULATOR_MODE_IDLE: /* standby mode */ force_continuous_enable(wm8350, dcdc, 0); wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val); wm8350_clear_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val); break; case REGULATOR_MODE_STANDBY: /* LDO mode */ force_continuous_enable(wm8350, dcdc, 0); wm8350_set_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val); break; } return 0; } static unsigned int wm8350_dcdc_get_mode(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int dcdc = rdev_get_id(rdev); u16 mask, sleep, active, force; int mode = REGULATOR_MODE_NORMAL; if (dcdc < WM8350_DCDC_1 || dcdc > WM8350_DCDC_6) return -EINVAL; if (dcdc == WM8350_DCDC_2 || dcdc == WM8350_DCDC_5) return -EINVAL; mask = 1 << (dcdc - WM8350_DCDC_1); active = wm8350_reg_read(wm8350, WM8350_DCDC_ACTIVE_OPTIONS) & mask; sleep = wm8350_reg_read(wm8350, WM8350_DCDC_SLEEP_OPTIONS) & mask; force = wm8350_reg_read(wm8350, WM8350_DCDC1_FORCE_PWM) & WM8350_DCDC1_FORCE_PWM_ENA; dev_dbg(wm8350->dev, "mask %x active %x sleep %x force %x", mask, active, sleep, force); if (active && !sleep) { if (force) mode = REGULATOR_MODE_FAST; else mode = REGULATOR_MODE_NORMAL; } else if (!active && !sleep) mode = REGULATOR_MODE_IDLE; else if (!sleep) mode = REGULATOR_MODE_STANDBY; return mode; } static unsigned int wm8350_ldo_get_mode(struct regulator_dev *rdev) { return REGULATOR_MODE_NORMAL; } struct wm8350_dcdc_efficiency { int uA_load_min; int uA_load_max; unsigned int mode; }; static const struct wm8350_dcdc_efficiency dcdc1_6_efficiency[] = { {0, 10000, REGULATOR_MODE_STANDBY}, /* 0 - 10mA - LDO */ {10000, 100000, REGULATOR_MODE_IDLE}, /* 10mA - 100mA - Standby */ {100000, 1000000, REGULATOR_MODE_NORMAL}, /* > 100mA - Active */ {-1, -1, REGULATOR_MODE_NORMAL}, }; static const struct wm8350_dcdc_efficiency dcdc3_4_efficiency[] = { {0, 10000, REGULATOR_MODE_STANDBY}, /* 0 - 10mA - LDO */ {10000, 100000, REGULATOR_MODE_IDLE}, /* 10mA - 100mA - Standby */ {100000, 800000, REGULATOR_MODE_NORMAL}, /* > 100mA - Active */ {-1, -1, REGULATOR_MODE_NORMAL}, }; static unsigned int get_mode(int uA, const struct wm8350_dcdc_efficiency *eff) { int i = 0; while (eff[i].uA_load_min != -1) { if (uA >= eff[i].uA_load_min && uA <= eff[i].uA_load_max) return eff[i].mode; } return REGULATOR_MODE_NORMAL; } /* Query the regulator for it's most efficient mode @ uV,uA * WM8350 regulator efficiency is pretty similar over * different input and output uV. */ static unsigned int wm8350_dcdc_get_optimum_mode(struct regulator_dev *rdev, int input_uV, int output_uV, int output_uA) { int dcdc = rdev_get_id(rdev), mode; switch (dcdc) { case WM8350_DCDC_1: case WM8350_DCDC_6: mode = get_mode(output_uA, dcdc1_6_efficiency); break; case WM8350_DCDC_3: case WM8350_DCDC_4: mode = get_mode(output_uA, dcdc3_4_efficiency); break; default: mode = REGULATOR_MODE_NORMAL; break; } return mode; } static int wm8350_dcdc_is_enabled(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int dcdc = rdev_get_id(rdev), shift; if (dcdc < WM8350_DCDC_1 || dcdc > WM8350_DCDC_6) return -EINVAL; shift = dcdc - WM8350_DCDC_1; return wm8350_reg_read(wm8350, WM8350_DCDC_LDO_REQUESTED) & (1 << shift); } static int wm8350_ldo_is_enabled(struct regulator_dev *rdev) { struct wm8350 *wm8350 = rdev_get_drvdata(rdev); int ldo = rdev_get_id(rdev), shift; if (ldo < WM8350_LDO_1 || ldo > WM8350_LDO_4) return -EINVAL; shift = (ldo - WM8350_LDO_1) + 8; return wm8350_reg_read(wm8350, WM8350_DCDC_LDO_REQUESTED) & (1 << shift); } static struct regulator_ops wm8350_dcdc_ops = { .set_voltage = wm8350_dcdc_set_voltage, .get_voltage = wm8350_dcdc_get_voltage, .enable = wm8350_dcdc_enable, .disable = wm8350_dcdc_disable, .get_mode = wm8350_dcdc_get_mode, .set_mode = wm8350_dcdc_set_mode, .get_optimum_mode = wm8350_dcdc_get_optimum_mode, .is_enabled = wm8350_dcdc_is_enabled, .set_suspend_voltage = wm8350_dcdc_set_suspend_voltage, .set_suspend_enable = wm8350_dcdc_set_suspend_enable, .set_suspend_disable = wm8350_dcdc_set_suspend_disable, .set_suspend_mode = wm8350_dcdc_set_suspend_mode, }; static struct regulator_ops wm8350_dcdc2_5_ops = { .enable = wm8350_dcdc_enable, .disable = wm8350_dcdc_disable, .is_enabled = wm8350_dcdc_is_enabled, .set_suspend_enable = wm8350_dcdc25_set_suspend_enable, .set_suspend_disable = wm8350_dcdc25_set_suspend_disable, }; static struct regulator_ops wm8350_ldo_ops = { .set_voltage = wm8350_ldo_set_voltage, .get_voltage = wm8350_ldo_get_voltage, .enable = wm8350_ldo_enable, .disable = wm8350_ldo_disable, .is_enabled = wm8350_ldo_is_enabled, .get_mode = wm8350_ldo_get_mode, .set_suspend_voltage = wm8350_ldo_set_suspend_voltage, .set_suspend_enable = wm8350_ldo_set_suspend_enable, .set_suspend_disable = wm8350_ldo_set_suspend_disable, }; static struct regulator_ops wm8350_isink_ops = { .set_current_limit = wm8350_isink_set_current, .get_current_limit = wm8350_isink_get_current, .enable = wm8350_isink_enable, .disable = wm8350_isink_disable, .is_enabled = wm8350_isink_is_enabled, }; static struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = { { .name = "DCDC1", .id = WM8350_DCDC_1, .ops = &wm8350_dcdc_ops, .irq = WM8350_IRQ_UV_DC1, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "DCDC2", .id = WM8350_DCDC_2, .ops = &wm8350_dcdc2_5_ops, .irq = WM8350_IRQ_UV_DC2, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "DCDC3", .id = WM8350_DCDC_3, .ops = &wm8350_dcdc_ops, .irq = WM8350_IRQ_UV_DC3, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "DCDC4", .id = WM8350_DCDC_4, .ops = &wm8350_dcdc_ops, .irq = WM8350_IRQ_UV_DC4, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "DCDC5", .id = WM8350_DCDC_5, .ops = &wm8350_dcdc2_5_ops, .irq = WM8350_IRQ_UV_DC5, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "DCDC6", .id = WM8350_DCDC_6, .ops = &wm8350_dcdc_ops, .irq = WM8350_IRQ_UV_DC6, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO1", .id = WM8350_LDO_1, .ops = &wm8350_ldo_ops, .irq = WM8350_IRQ_UV_LDO1, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO2", .id = WM8350_LDO_2, .ops = &wm8350_ldo_ops, .irq = WM8350_IRQ_UV_LDO2, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO3", .id = WM8350_LDO_3, .ops = &wm8350_ldo_ops, .irq = WM8350_IRQ_UV_LDO3, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO4", .id = WM8350_LDO_4, .ops = &wm8350_ldo_ops, .irq = WM8350_IRQ_UV_LDO4, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "ISINKA", .id = WM8350_ISINK_A, .ops = &wm8350_isink_ops, .irq = WM8350_IRQ_CS1, .type = REGULATOR_CURRENT, .owner = THIS_MODULE, }, { .name = "ISINKB", .id = WM8350_ISINK_B, .ops = &wm8350_isink_ops, .irq = WM8350_IRQ_CS2, .type = REGULATOR_CURRENT, .owner = THIS_MODULE, }, }; static void pmic_uv_handler(struct wm8350 *wm8350, int irq, void *data) { struct regulator_dev *rdev = (struct regulator_dev *)data; if (irq == WM8350_IRQ_CS1 || irq == WM8350_IRQ_CS2) regulator_notifier_call_chain(rdev, REGULATOR_EVENT_REGULATION_OUT, wm8350); else regulator_notifier_call_chain(rdev, REGULATOR_EVENT_UNDER_VOLTAGE, wm8350); } static int wm8350_regulator_probe(struct platform_device *pdev) { struct wm8350 *wm8350 = dev_get_drvdata(&pdev->dev); struct regulator_dev *rdev; int ret; u16 val; if (pdev->id < WM8350_DCDC_1 || pdev->id > WM8350_ISINK_B) return -ENODEV; /* do any regulatior specific init */ switch (pdev->id) { case WM8350_DCDC_1: val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER); wm8350->pmic.dcdc1_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK; break; case WM8350_DCDC_3: val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER); wm8350->pmic.dcdc3_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK; break; case WM8350_DCDC_4: val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER); wm8350->pmic.dcdc4_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK; break; case WM8350_DCDC_6: val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER); wm8350->pmic.dcdc6_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK; break; } /* register regulator */ rdev = regulator_register(&wm8350_reg[pdev->id], &pdev->dev, dev_get_drvdata(&pdev->dev)); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "failed to register %s\n", wm8350_reg[pdev->id].name); return PTR_ERR(rdev); } /* register regulator IRQ */ ret = wm8350_register_irq(wm8350, wm8350_reg[pdev->id].irq, pmic_uv_handler, rdev); if (ret < 0) { regulator_unregister(rdev); dev_err(&pdev->dev, "failed to register regulator %s IRQ\n", wm8350_reg[pdev->id].name); return ret; } wm8350_unmask_irq(wm8350, wm8350_reg[pdev->id].irq); return 0; } static int wm8350_regulator_remove(struct platform_device *pdev) { struct regulator_dev *rdev = platform_get_drvdata(pdev); struct wm8350 *wm8350 = rdev_get_drvdata(rdev); wm8350_mask_irq(wm8350, wm8350_reg[pdev->id].irq); wm8350_free_irq(wm8350, wm8350_reg[pdev->id].irq); regulator_unregister(rdev); return 0; } int wm8350_register_regulator(struct wm8350 *wm8350, int reg, struct regulator_init_data *initdata) { struct platform_device *pdev; int ret; if (wm8350->pmic.pdev[reg]) return -EBUSY; if (reg >= WM8350_DCDC_1 && reg <= WM8350_DCDC_6 && reg > wm8350->pmic.max_dcdc) return -ENODEV; if (reg >= WM8350_ISINK_A && reg <= WM8350_ISINK_B && reg > wm8350->pmic.max_isink) return -ENODEV; pdev = platform_device_alloc("wm8350-regulator", reg); if (!pdev) return -ENOMEM; wm8350->pmic.pdev[reg] = pdev; initdata->driver_data = wm8350; pdev->dev.platform_data = initdata; pdev->dev.parent = wm8350->dev; platform_set_drvdata(pdev, wm8350); ret = platform_device_add(pdev); if (ret != 0) { dev_err(wm8350->dev, "Failed to register regulator %d: %d\n", reg, ret); platform_device_del(pdev); wm8350->pmic.pdev[reg] = NULL; } return ret; } EXPORT_SYMBOL_GPL(wm8350_register_regulator); static struct platform_driver wm8350_regulator_driver = { .probe = wm8350_regulator_probe, .remove = wm8350_regulator_remove, .driver = { .name = "wm8350-regulator", }, }; static int __init wm8350_regulator_init(void) { return platform_driver_register(&wm8350_regulator_driver); } subsys_initcall(wm8350_regulator_init); static void __exit wm8350_regulator_exit(void) { platform_driver_unregister(&wm8350_regulator_driver); } module_exit(wm8350_regulator_exit); /* Module information */ MODULE_AUTHOR("Liam Girdwood"); MODULE_DESCRIPTION("WM8350 voltage and current regulator driver"); MODULE_LICENSE("GPL");