/* * Copyright (C) 2012 Samsung Electronics * Alim Akhtar * * 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. * * 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 #include #include #include "max77686.h" /* Chip register numbers (not exported from this module) */ enum { REG_BBAT = 0x7e, /* Bits for BBAT */ BBAT_BBCHOSTEN_MASK = 1 << 0, BBAT_BBCVS_SHIFT = 3, BBAT_BBCVS_MASK = 3 << BBAT_BBCVS_SHIFT, }; /* * Max77686 parameters values * see max77686.h for parameters details */ struct max77686_para max77686_param[] = {/*{vol_addr, vol_bitpos, vol_bitmask, reg_enaddr, reg_enbitpos, reg_enbitmask, reg_enbiton, reg_enbitoff, vol_min, vol_div}*/ {/* PMIC_BUCK1 */ 0x11, 0x0, 0x3F, 0x10, 0x0, 0x3, 0x3, 0x0, 750, 50000}, {/* PMIC_BUCK2 */ 0x14, 0x0, 0xFF, 0x12, 0x4, 0x3, 0x1, 0x0, 600, 12500}, {/* PMIC_BUCK3 */ 0x1E, 0x0, 0xFF, 0x1C, 0x4, 0x3, 0x1, 0x0, 600, 12500}, {/* PMIC_BUCK4 */ 0x28, 0x0, 0xFF, 0x26, 0x4, 0x3, 0x1, 0x0, 600, 12500}, {/* PMIC_BUCK5 */ 0x31, 0x0, 0x3F, 0x30, 0x0, 0x3, 0x3, 0x0, 750, 50000}, {/* PMIC_BUCK6 */ 0x33, 0x0, 0x3F, 0x32, 0x0, 0x3, 0x3, 0x0, 750, 50000}, {/* PMIC_BUCK7 */ 0x35, 0x0, 0x3F, 0x34, 0x0, 0x3, 0x3, 0x0, 750, 50000}, {/* PMIC_BUCK8 */ 0x37, 0x0, 0x3F, 0x36, 0x0, 0x3, 0x3, 0x0, 750, 50000}, {/* PMIC_BUCK9 */ 0x39, 0x0, 0x3F, 0x38, 0x0, 0x3, 0x3, 0x0, 750, 50000}, {/* PMIC_LDO1 */ 0x40, 0x0, 0x3F, 0x40, 0x6, 0x3, 0x3, 0x0, 800, 25000}, {/* PMIC_LDO2 */ 0x41, 0x0, 0x3F, 0x41, 0x6, 0x3, 0x1, 0x0, 800, 25000}, {/* PMIC_LDO3 */ 0x42, 0x0, 0x3F, 0x42, 0x6, 0x3, 0x3, 0x0, 800, 50000}, {/* PMIC_LDO4 */ 0x43, 0x0, 0x3F, 0x43, 0x6, 0x3, 0x3, 0x0, 800, 50000}, {/* PMIC_LDO5 */ 0x44, 0x0, 0x3F, 0x44, 0x6, 0x3, 0x3, 0x0, 800, 50000}, {/* PMIC_LDO6 */ 0x45, 0x0, 0x3F, 0x45, 0x6, 0x3, 0x1, 0x0, 800, 25000}, {/* PMIC_LDO7 */ 0x46, 0x0, 0x3F, 0x46, 0x6, 0x3, 0x1, 0x0, 800, 25000}, {/* PMIC_LDO8 */ 0x47, 0x0, 0x3F, 0x47, 0x6, 0x3, 0x1, 0x0, 800, 25000}, {/* PMIC_LDO9 */ 0x48, 0x0, 0x3F, 0x48, 0x6, 0x3, 0x3, 0x0, 800, 50000}, {/* PMIC_LDO10 */ 0x49, 0x0, 0x3F, 0x49, 0x6, 0x3, 0x1, 0x0, 800, 50000}, {/* PMIC_LDO11 */ 0x4A, 0x0, 0x3F, 0x4A, 0x6, 0x3, 0x1, 0x0, 800, 50000}, {/* PMIC_LDO12 */ 0x4B, 0x0, 0x3F, 0x4B, 0x6, 0x3, 0x1, 0x0, 800, 50000}, {/* PMIC_LDO13 */ 0x4C, 0x0, 0x3F, 0x4C, 0x6, 0x3, 0x3, 0x0, 800, 50000}, {/* PMIC_LDO14 */ 0x4D, 0x0, 0x3F, 0x4D, 0x6, 0x3, 0x1, 0x0, 800, 50000}, {/* PMIC_LDO15 */ 0x4E, 0x0, 0x3F, 0x4E, 0x6, 0x3, 0x1, 0x0, 800, 25000}, {/* PMIC_LDO16 */ 0x4F, 0x0, 0x3F, 0x4F, 0x6, 0x3, 0x1, 0x0, 800, 50000}, {/* PMIC_LDO17 */ 0x50, 0x0, 0x3F, 0x50, 0x6, 0x3, 0x3, 0x0, 800, 50000}, {/* PMIC_LDO18 */ 0x51, 0x0, 0x3F, 0x51, 0x6, 0x3, 0x3, 0x0, 800, 50000}, {/* PMIC_LDO19 */ 0x52, 0x0, 0x3F, 0x52, 0x6, 0x3, 0x3, 0x0, 800, 50000}, {/* PMIC_LDO20 */ 0x53, 0x0, 0x3F, 0x53, 0x6, 0x3, 0x3, 0x0, 800, 50000}, {/* PMIC_LDO21 */ 0x54, 0x0, 0x3F, 0x54, 0x6, 0x3, 0x3, 0x0, 800, 50000}, {/* PMIC_LDO22 */ 0x55, 0x0, 0x3F, 0x55, 0x6, 0x3, 0x3, 0x0, 800, 50000}, {/* PMIC_LDO23 */ 0x56, 0x0, 0x3F, 0x56, 0x6, 0x3, 0x3, 0x0, 800, 50000}, {/* PMIC_LDO24 */ 0x57, 0x0, 0x3F, 0x57, 0x6, 0x3, 0x3, 0x0, 800, 50000}, {/* PMIC_LDO25 */ 0x58, 0x0, 0x3F, 0x58, 0x6, 0x3, 0x3, 0x0, 800, 50000}, {/* PMIC_LDO26 */ 0x59, 0x0, 0x3F, 0x59, 0x6, 0x3, 0x3, 0x0, 800, 50000}, {/* PMIC_EN32KHZ_CP */ 0x0, 0x0, 0x0, 0x7F, 0x1, 0x1, 0x1, 0x0, 0x0, 0x0}, }; /* * Write a value to a register * * @param chip_addr i2c addr for max77686 * @param reg reg number to write * @param val value to be written * */ static inline int max77686_i2c_write(unsigned int bus, unsigned char chip_addr, unsigned int reg, unsigned char val) { return i2c_writeb(bus, chip_addr, reg, val); } /* * Read a value from a register * * @param chip_addr i2c addr for max77686 * @param reg reg number to write * @param val value to be written * */ static inline int max77686_i2c_read(unsigned int bus, unsigned char chip_addr, unsigned int reg, unsigned char *val) { return i2c_readb(bus, chip_addr, reg, (uint8_t *)val); } /* * Enable the max77686 register * * @param reg register number of buck/ldo to be enabled * @param enable enable or disable bit * * REG_DISABLE = 0, needed to set the buck/ldo enable bit OFF * @return Return 0 if ok, else -1 */ static int max77686_enablereg(unsigned int bus, enum max77686_regnum reg, int enable) { struct max77686_para *pmic; unsigned char read_data; int ret; pmic = &max77686_param[reg]; ret = max77686_i2c_read(bus, MAX77686_I2C_ADDR, pmic->reg_enaddr, &read_data); if (ret != 0) { printk(BIOS_DEBUG, "max77686 i2c read failed.\n"); return -1; } if (enable == REG_DISABLE) { clrbits_8(&read_data, pmic->reg_enbitmask << pmic->reg_enbitpos); } else { clrsetbits_8(&read_data, pmic->reg_enbitmask << pmic->reg_enbitpos, pmic->reg_enbiton << pmic->reg_enbitpos); } ret = max77686_i2c_write(bus, MAX77686_I2C_ADDR, pmic->reg_enaddr, read_data); if (ret != 0) { printk(BIOS_DEBUG, "max77686 i2c write failed.\n"); return -1; } return 0; } int max77686_volsetting(unsigned int bus, enum max77686_regnum reg, unsigned int volt, int enable, int volt_units) { struct max77686_para *pmic; unsigned char read_data; int vol_level = 0; int ret; pmic = &max77686_param[reg]; if (pmic->vol_addr == 0) { printk(BIOS_DEBUG, "not a voltage register.\n"); return -1; } ret = max77686_i2c_read(bus, MAX77686_I2C_ADDR, pmic->vol_addr, &read_data); if (ret != 0) { printk(BIOS_DEBUG, "max77686 i2c read failed.\n"); return -1; } if (volt_units == MAX77686_UV) vol_level = volt - (u32)pmic->vol_min * 1000; else vol_level = (volt - (u32)pmic->vol_min) * 1000; if (vol_level < 0) { printk(BIOS_DEBUG, "Not a valid voltage level to set\n"); return -1; } vol_level /= (u32)pmic->vol_div; clrsetbits_8(&read_data, pmic->vol_bitmask << pmic->vol_bitpos, vol_level << pmic->vol_bitpos); ret = max77686_i2c_write(bus, MAX77686_I2C_ADDR, pmic->vol_addr, read_data); if (ret != 0) { printk(BIOS_DEBUG, "max77686 i2c write failed.\n"); return -1; } ret = max77686_enablereg(bus, reg, enable); if (ret != 0) { printk(BIOS_DEBUG, "Failed to enable buck/ldo.\n"); return -1; } return 0; } int max77686_enable_32khz_cp(unsigned int bus) { return max77686_enablereg(bus, PMIC_EN32KHZ_CP, REG_ENABLE); } int max77686_disable_backup_batt(unsigned int bus) { unsigned char val; int ret; ret = max77686_i2c_read(bus, MAX77686_I2C_ADDR, REG_BBAT, &val); if (ret) { printk(BIOS_DEBUG, "max77686 i2c read failed\n"); return ret; } /* If we already have the correct values, exit */ if ((val & (BBAT_BBCVS_MASK | BBAT_BBCHOSTEN_MASK)) == BBAT_BBCVS_MASK) return 0; /* First disable charging */ val &= ~BBAT_BBCHOSTEN_MASK; ret = max77686_i2c_write(bus, MAX77686_I2C_ADDR, REG_BBAT, val); if (ret) { printk(BIOS_DEBUG, "max77686 i2c write failed\n"); return -1; } /* Finally select 3.5V to minimize power consumption */ val |= BBAT_BBCVS_MASK; ret = max77686_i2c_write(bus, MAX77686_I2C_ADDR, REG_BBAT, val); if (ret) { printk(BIOS_DEBUG, "max77686 i2c write failed\n"); return -1; } return 0; }