542 lines
12 KiB
C
542 lines
12 KiB
C
/*
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* tps65912.c -- TI tps65912
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*
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* Copyright 2011 Texas Instruments Inc.
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*
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* Author: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This driver is based on wm8350 implementation.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/slab.h>
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#include <linux/gpio.h>
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#include <linux/mfd/tps65912.h>
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/* DCDC's */
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#define TPS65912_REG_DCDC1 0
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#define TPS65912_REG_DCDC2 1
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#define TPS65912_REG_DCDC3 2
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#define TPS65912_REG_DCDC4 3
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/* LDOs */
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#define TPS65912_REG_LDO1 4
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#define TPS65912_REG_LDO2 5
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#define TPS65912_REG_LDO3 6
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#define TPS65912_REG_LDO4 7
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#define TPS65912_REG_LDO5 8
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#define TPS65912_REG_LDO6 9
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#define TPS65912_REG_LDO7 10
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#define TPS65912_REG_LDO8 11
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#define TPS65912_REG_LDO9 12
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#define TPS65912_REG_LDO10 13
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/* Number of step-down converters available */
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#define TPS65912_NUM_DCDC 4
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/* Number of LDO voltage regulators available */
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#define TPS65912_NUM_LDO 10
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/* Number of total regulators available */
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#define TPS65912_NUM_REGULATOR (TPS65912_NUM_DCDC + TPS65912_NUM_LDO)
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#define TPS65912_REG_ENABLED 0x80
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#define OP_SELREG_MASK 0x40
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#define OP_SELREG_SHIFT 6
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struct tps_info {
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const char *name;
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};
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static struct tps_info tps65912_regs[] = {
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{
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.name = "DCDC1",
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},
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{
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.name = "DCDC2",
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},
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{
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.name = "DCDC3",
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},
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{
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.name = "DCDC4",
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},
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{
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.name = "LDO1",
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},
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{
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.name = "LDO2",
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},
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{
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.name = "LDO3",
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},
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{
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.name = "LDO4",
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},
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{
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.name = "LDO5",
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},
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{
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.name = "LDO6",
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},
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{
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.name = "LDO7",
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},
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{
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.name = "LDO8",
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},
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{
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.name = "LDO9",
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},
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{
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.name = "LDO10",
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},
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};
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struct tps65912_reg {
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struct regulator_desc desc[TPS65912_NUM_REGULATOR];
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struct tps65912 *mfd;
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struct regulator_dev *rdev[TPS65912_NUM_REGULATOR];
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struct tps_info *info[TPS65912_NUM_REGULATOR];
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/* for read/write access */
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struct mutex io_lock;
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int mode;
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int (*get_ctrl_reg)(int);
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int dcdc_range[TPS65912_NUM_DCDC];
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int pwm_mode_reg;
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int eco_reg;
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};
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static const struct regulator_linear_range tps65912_ldo_ranges[] = {
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REGULATOR_LINEAR_RANGE(800000, 0, 32, 25000),
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REGULATOR_LINEAR_RANGE(1650000, 33, 60, 50000),
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REGULATOR_LINEAR_RANGE(3100000, 61, 63, 100000),
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};
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static int tps65912_get_range(struct tps65912_reg *pmic, int id)
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{
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struct tps65912 *mfd = pmic->mfd;
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int range;
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switch (id) {
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case TPS65912_REG_DCDC1:
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range = tps65912_reg_read(mfd, TPS65912_DCDC1_LIMIT);
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break;
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case TPS65912_REG_DCDC2:
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range = tps65912_reg_read(mfd, TPS65912_DCDC2_LIMIT);
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break;
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case TPS65912_REG_DCDC3:
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range = tps65912_reg_read(mfd, TPS65912_DCDC3_LIMIT);
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break;
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case TPS65912_REG_DCDC4:
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range = tps65912_reg_read(mfd, TPS65912_DCDC4_LIMIT);
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break;
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default:
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return 0;
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}
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if (range >= 0)
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range = (range & DCDC_LIMIT_RANGE_MASK)
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>> DCDC_LIMIT_RANGE_SHIFT;
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pmic->dcdc_range[id] = range;
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return range;
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}
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static unsigned long tps65912_vsel_to_uv_range0(u8 vsel)
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{
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unsigned long uv;
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uv = ((vsel * 12500) + 500000);
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return uv;
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}
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static unsigned long tps65912_vsel_to_uv_range1(u8 vsel)
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{
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unsigned long uv;
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uv = ((vsel * 12500) + 700000);
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return uv;
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}
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static unsigned long tps65912_vsel_to_uv_range2(u8 vsel)
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{
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unsigned long uv;
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uv = ((vsel * 25000) + 500000);
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return uv;
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}
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static unsigned long tps65912_vsel_to_uv_range3(u8 vsel)
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{
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unsigned long uv;
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if (vsel == 0x3f)
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uv = 3800000;
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else
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uv = ((vsel * 50000) + 500000);
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return uv;
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}
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static int tps65912_get_ctrl_register(int id)
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{
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if (id >= TPS65912_REG_DCDC1 && id <= TPS65912_REG_LDO4)
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return id * 3 + TPS65912_DCDC1_AVS;
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else if (id >= TPS65912_REG_LDO5 && id <= TPS65912_REG_LDO10)
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return id - TPS65912_REG_LDO5 + TPS65912_LDO5;
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else
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return -EINVAL;
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}
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static int tps65912_get_sel_register(struct tps65912_reg *pmic, int id)
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{
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struct tps65912 *mfd = pmic->mfd;
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int opvsel;
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u8 reg = 0;
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if (id >= TPS65912_REG_DCDC1 && id <= TPS65912_REG_LDO4) {
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opvsel = tps65912_reg_read(mfd, id * 3 + TPS65912_DCDC1_OP);
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if (opvsel & OP_SELREG_MASK)
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reg = id * 3 + TPS65912_DCDC1_AVS;
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else
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reg = id * 3 + TPS65912_DCDC1_OP;
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} else if (id >= TPS65912_REG_LDO5 && id <= TPS65912_REG_LDO10) {
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reg = id - TPS65912_REG_LDO5 + TPS65912_LDO5;
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} else {
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return -EINVAL;
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}
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return reg;
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}
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static int tps65912_get_mode_regiters(struct tps65912_reg *pmic, int id)
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{
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switch (id) {
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case TPS65912_REG_DCDC1:
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pmic->pwm_mode_reg = TPS65912_DCDC1_CTRL;
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pmic->eco_reg = TPS65912_DCDC1_AVS;
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break;
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case TPS65912_REG_DCDC2:
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pmic->pwm_mode_reg = TPS65912_DCDC2_CTRL;
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pmic->eco_reg = TPS65912_DCDC2_AVS;
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break;
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case TPS65912_REG_DCDC3:
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pmic->pwm_mode_reg = TPS65912_DCDC3_CTRL;
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pmic->eco_reg = TPS65912_DCDC3_AVS;
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break;
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case TPS65912_REG_DCDC4:
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pmic->pwm_mode_reg = TPS65912_DCDC4_CTRL;
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pmic->eco_reg = TPS65912_DCDC4_AVS;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int tps65912_reg_is_enabled(struct regulator_dev *dev)
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{
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struct tps65912_reg *pmic = rdev_get_drvdata(dev);
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struct tps65912 *mfd = pmic->mfd;
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int reg, value, id = rdev_get_id(dev);
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if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10)
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return -EINVAL;
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reg = pmic->get_ctrl_reg(id);
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if (reg < 0)
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return reg;
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value = tps65912_reg_read(mfd, reg);
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if (value < 0)
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return value;
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return value & TPS65912_REG_ENABLED;
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}
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static int tps65912_reg_enable(struct regulator_dev *dev)
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{
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struct tps65912_reg *pmic = rdev_get_drvdata(dev);
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struct tps65912 *mfd = pmic->mfd;
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int id = rdev_get_id(dev);
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int reg;
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if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10)
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return -EINVAL;
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reg = pmic->get_ctrl_reg(id);
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if (reg < 0)
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return reg;
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return tps65912_set_bits(mfd, reg, TPS65912_REG_ENABLED);
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}
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static int tps65912_reg_disable(struct regulator_dev *dev)
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{
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struct tps65912_reg *pmic = rdev_get_drvdata(dev);
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struct tps65912 *mfd = pmic->mfd;
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int id = rdev_get_id(dev), reg;
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reg = pmic->get_ctrl_reg(id);
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if (reg < 0)
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return reg;
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return tps65912_clear_bits(mfd, reg, TPS65912_REG_ENABLED);
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}
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static int tps65912_set_mode(struct regulator_dev *dev, unsigned int mode)
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{
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struct tps65912_reg *pmic = rdev_get_drvdata(dev);
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struct tps65912 *mfd = pmic->mfd;
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int pwm_mode, eco, id = rdev_get_id(dev);
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tps65912_get_mode_regiters(pmic, id);
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pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg);
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eco = tps65912_reg_read(mfd, pmic->eco_reg);
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pwm_mode &= DCDCCTRL_DCDC_MODE_MASK;
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eco &= DCDC_AVS_ECO_MASK;
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switch (mode) {
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case REGULATOR_MODE_FAST:
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/* Verify if mode alredy set */
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if (pwm_mode && !eco)
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break;
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tps65912_set_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
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tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
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break;
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case REGULATOR_MODE_NORMAL:
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case REGULATOR_MODE_IDLE:
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if (!pwm_mode && !eco)
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break;
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tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
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tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
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break;
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case REGULATOR_MODE_STANDBY:
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if (!pwm_mode && eco)
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break;
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tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
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tps65912_set_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static unsigned int tps65912_get_mode(struct regulator_dev *dev)
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{
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struct tps65912_reg *pmic = rdev_get_drvdata(dev);
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struct tps65912 *mfd = pmic->mfd;
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int pwm_mode, eco, mode = 0, id = rdev_get_id(dev);
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tps65912_get_mode_regiters(pmic, id);
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pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg);
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eco = tps65912_reg_read(mfd, pmic->eco_reg);
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pwm_mode &= DCDCCTRL_DCDC_MODE_MASK;
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eco &= DCDC_AVS_ECO_MASK;
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if (pwm_mode && !eco)
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mode = REGULATOR_MODE_FAST;
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else if (!pwm_mode && !eco)
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mode = REGULATOR_MODE_NORMAL;
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else if (!pwm_mode && eco)
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mode = REGULATOR_MODE_STANDBY;
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return mode;
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}
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static int tps65912_list_voltage(struct regulator_dev *dev, unsigned selector)
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{
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struct tps65912_reg *pmic = rdev_get_drvdata(dev);
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int range, voltage = 0, id = rdev_get_id(dev);
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if (id > TPS65912_REG_DCDC4)
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return -EINVAL;
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range = pmic->dcdc_range[id];
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switch (range) {
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case 0:
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/* 0.5 - 1.2875V in 12.5mV steps */
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voltage = tps65912_vsel_to_uv_range0(selector);
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break;
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case 1:
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/* 0.7 - 1.4875V in 12.5mV steps */
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voltage = tps65912_vsel_to_uv_range1(selector);
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break;
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case 2:
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/* 0.5 - 2.075V in 25mV steps */
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voltage = tps65912_vsel_to_uv_range2(selector);
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break;
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case 3:
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/* 0.5 - 3.8V in 50mV steps */
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voltage = tps65912_vsel_to_uv_range3(selector);
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break;
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}
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return voltage;
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}
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static int tps65912_get_voltage_sel(struct regulator_dev *dev)
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{
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struct tps65912_reg *pmic = rdev_get_drvdata(dev);
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struct tps65912 *mfd = pmic->mfd;
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int id = rdev_get_id(dev);
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int reg, vsel;
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reg = tps65912_get_sel_register(pmic, id);
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if (reg < 0)
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return reg;
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vsel = tps65912_reg_read(mfd, reg);
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vsel &= 0x3F;
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return vsel;
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}
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static int tps65912_set_voltage_sel(struct regulator_dev *dev,
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unsigned selector)
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{
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struct tps65912_reg *pmic = rdev_get_drvdata(dev);
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struct tps65912 *mfd = pmic->mfd;
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int id = rdev_get_id(dev);
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int value;
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u8 reg;
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reg = tps65912_get_sel_register(pmic, id);
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value = tps65912_reg_read(mfd, reg);
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value &= 0xC0;
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return tps65912_reg_write(mfd, reg, selector | value);
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}
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/* Operations permitted on DCDCx */
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static struct regulator_ops tps65912_ops_dcdc = {
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.is_enabled = tps65912_reg_is_enabled,
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.enable = tps65912_reg_enable,
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.disable = tps65912_reg_disable,
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.set_mode = tps65912_set_mode,
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.get_mode = tps65912_get_mode,
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.get_voltage_sel = tps65912_get_voltage_sel,
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.set_voltage_sel = tps65912_set_voltage_sel,
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.list_voltage = tps65912_list_voltage,
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};
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/* Operations permitted on LDOx */
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static struct regulator_ops tps65912_ops_ldo = {
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.is_enabled = tps65912_reg_is_enabled,
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.enable = tps65912_reg_enable,
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.disable = tps65912_reg_disable,
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.get_voltage_sel = tps65912_get_voltage_sel,
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.set_voltage_sel = tps65912_set_voltage_sel,
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.list_voltage = regulator_list_voltage_linear_range,
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.map_voltage = regulator_map_voltage_linear_range,
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};
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static int tps65912_probe(struct platform_device *pdev)
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{
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struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
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struct regulator_config config = { };
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struct tps_info *info;
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struct regulator_init_data *reg_data;
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struct regulator_dev *rdev;
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struct tps65912_reg *pmic;
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struct tps65912_board *pmic_plat_data;
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int i;
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pmic_plat_data = dev_get_platdata(tps65912->dev);
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if (!pmic_plat_data)
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return -EINVAL;
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reg_data = pmic_plat_data->tps65912_pmic_init_data;
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pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
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if (!pmic)
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return -ENOMEM;
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mutex_init(&pmic->io_lock);
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pmic->mfd = tps65912;
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platform_set_drvdata(pdev, pmic);
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pmic->get_ctrl_reg = &tps65912_get_ctrl_register;
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info = tps65912_regs;
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for (i = 0; i < TPS65912_NUM_REGULATOR; i++, info++, reg_data++) {
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int range = 0;
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/* Register the regulators */
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pmic->info[i] = info;
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pmic->desc[i].name = info->name;
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pmic->desc[i].id = i;
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pmic->desc[i].n_voltages = 64;
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if (i > TPS65912_REG_DCDC4) {
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pmic->desc[i].ops = &tps65912_ops_ldo;
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pmic->desc[i].linear_ranges = tps65912_ldo_ranges;
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pmic->desc[i].n_linear_ranges =
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ARRAY_SIZE(tps65912_ldo_ranges);
|
|
} else {
|
|
pmic->desc[i].ops = &tps65912_ops_dcdc;
|
|
}
|
|
pmic->desc[i].type = REGULATOR_VOLTAGE;
|
|
pmic->desc[i].owner = THIS_MODULE;
|
|
range = tps65912_get_range(pmic, i);
|
|
|
|
config.dev = tps65912->dev;
|
|
config.init_data = reg_data;
|
|
config.driver_data = pmic;
|
|
|
|
rdev = devm_regulator_register(&pdev->dev, &pmic->desc[i],
|
|
&config);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(tps65912->dev,
|
|
"failed to register %s regulator\n",
|
|
pdev->name);
|
|
return PTR_ERR(rdev);
|
|
}
|
|
|
|
/* Save regulator for cleanup */
|
|
pmic->rdev[i] = rdev;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver tps65912_driver = {
|
|
.driver = {
|
|
.name = "tps65912-pmic",
|
|
},
|
|
.probe = tps65912_probe,
|
|
};
|
|
|
|
static int __init tps65912_init(void)
|
|
{
|
|
return platform_driver_register(&tps65912_driver);
|
|
}
|
|
subsys_initcall(tps65912_init);
|
|
|
|
static void __exit tps65912_cleanup(void)
|
|
{
|
|
platform_driver_unregister(&tps65912_driver);
|
|
}
|
|
module_exit(tps65912_cleanup);
|
|
|
|
MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
|
|
MODULE_DESCRIPTION("TPS65912 voltage regulator driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("platform:tps65912-pmic");
|