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09ca50d2ad
To skip registering regulator if no platform initialization data, we should check reg_data rather than ri->desc.name. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
370 lines
9.9 KiB
C
370 lines
9.9 KiB
C
/*
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* AS3711 PMIC regulator driver, using DCDC Step Down and LDO supplies
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*
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* Copyright (C) 2012 Renesas Electronics Corporation
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* Author: Guennadi Liakhovetski, <g.liakhovetski@gmx.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the version 2 of the GNU General Public License as
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* published by the Free Software Foundation
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*/
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/mfd/as3711.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/regulator/driver.h>
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#include <linux/slab.h>
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struct as3711_regulator_info {
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struct regulator_desc desc;
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unsigned int max_uV;
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};
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struct as3711_regulator {
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struct as3711_regulator_info *reg_info;
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struct regulator_dev *rdev;
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};
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static int as3711_list_voltage_sd(struct regulator_dev *rdev,
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unsigned int selector)
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{
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if (selector >= rdev->desc->n_voltages)
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return -EINVAL;
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if (!selector)
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return 0;
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if (selector < 0x41)
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return 600000 + selector * 12500;
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if (selector < 0x71)
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return 1400000 + (selector - 0x40) * 25000;
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return 2600000 + (selector - 0x70) * 50000;
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}
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static int as3711_list_voltage_aldo(struct regulator_dev *rdev,
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unsigned int selector)
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{
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if (selector >= rdev->desc->n_voltages)
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return -EINVAL;
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if (selector < 0x10)
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return 1200000 + selector * 50000;
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return 1800000 + (selector - 0x10) * 100000;
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}
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static int as3711_list_voltage_dldo(struct regulator_dev *rdev,
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unsigned int selector)
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{
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if (selector >= rdev->desc->n_voltages ||
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(selector > 0x10 && selector < 0x20))
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return -EINVAL;
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if (selector < 0x11)
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return 900000 + selector * 50000;
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return 1750000 + (selector - 0x20) * 50000;
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}
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static int as3711_bound_check(struct regulator_dev *rdev,
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int *min_uV, int *max_uV)
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{
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struct as3711_regulator *reg = rdev_get_drvdata(rdev);
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struct as3711_regulator_info *info = reg->reg_info;
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dev_dbg(&rdev->dev, "%s(), %d, %d, %d\n", __func__,
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*min_uV, rdev->desc->min_uV, info->max_uV);
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if (*max_uV < *min_uV ||
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*min_uV > info->max_uV || rdev->desc->min_uV > *max_uV)
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return -EINVAL;
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if (rdev->desc->n_voltages == 1)
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return 0;
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if (*max_uV > info->max_uV)
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*max_uV = info->max_uV;
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if (*min_uV < rdev->desc->min_uV)
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*min_uV = rdev->desc->min_uV;
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return *min_uV;
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}
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static int as3711_sel_check(int min, int max, int bottom, int step)
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{
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int sel, voltage;
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/* Round up min, when dividing: keeps us within the range */
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sel = DIV_ROUND_UP(min - bottom, step);
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voltage = sel * step + bottom;
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pr_debug("%s(): select %d..%d in %d+N*%d: %d\n", __func__,
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min, max, bottom, step, sel);
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if (voltage > max)
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return -EINVAL;
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return sel;
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}
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static int as3711_map_voltage_sd(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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int ret;
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ret = as3711_bound_check(rdev, &min_uV, &max_uV);
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if (ret <= 0)
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return ret;
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if (min_uV <= 1400000)
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return as3711_sel_check(min_uV, max_uV, 600000, 12500);
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if (min_uV <= 2600000)
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return as3711_sel_check(min_uV, max_uV, 1400000, 25000) + 0x40;
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return as3711_sel_check(min_uV, max_uV, 2600000, 50000) + 0x70;
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}
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/*
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* The regulator API supports 4 modes of operataion: FAST, NORMAL, IDLE and
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* STANDBY. We map them in the following way to AS3711 SD1-4 DCDC modes:
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* FAST: sdX_fast=1
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* NORMAL: low_noise=1
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* IDLE: low_noise=0
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*/
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static int as3711_set_mode_sd(struct regulator_dev *rdev, unsigned int mode)
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{
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unsigned int fast_bit = rdev->desc->enable_mask,
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low_noise_bit = fast_bit << 4;
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u8 val;
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switch (mode) {
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case REGULATOR_MODE_FAST:
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val = fast_bit | low_noise_bit;
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break;
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case REGULATOR_MODE_NORMAL:
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val = low_noise_bit;
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break;
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case REGULATOR_MODE_IDLE:
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val = 0;
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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 regmap_update_bits(rdev->regmap, AS3711_SD_CONTROL_1,
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low_noise_bit | fast_bit, val);
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}
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static unsigned int as3711_get_mode_sd(struct regulator_dev *rdev)
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{
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unsigned int fast_bit = rdev->desc->enable_mask,
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low_noise_bit = fast_bit << 4, mask = fast_bit | low_noise_bit;
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unsigned int val;
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int ret = regmap_read(rdev->regmap, AS3711_SD_CONTROL_1, &val);
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if (ret < 0)
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return ret;
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if ((val & mask) == mask)
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return REGULATOR_MODE_FAST;
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if ((val & mask) == low_noise_bit)
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return REGULATOR_MODE_NORMAL;
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if (!(val & mask))
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return REGULATOR_MODE_IDLE;
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return -EINVAL;
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}
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static int as3711_map_voltage_aldo(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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int ret;
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ret = as3711_bound_check(rdev, &min_uV, &max_uV);
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if (ret <= 0)
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return ret;
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if (min_uV <= 1800000)
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return as3711_sel_check(min_uV, max_uV, 1200000, 50000);
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return as3711_sel_check(min_uV, max_uV, 1800000, 100000) + 0x10;
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}
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static int as3711_map_voltage_dldo(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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int ret;
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ret = as3711_bound_check(rdev, &min_uV, &max_uV);
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if (ret <= 0)
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return ret;
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if (min_uV <= 1700000)
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return as3711_sel_check(min_uV, max_uV, 900000, 50000);
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return as3711_sel_check(min_uV, max_uV, 1750000, 50000) + 0x20;
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}
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static struct regulator_ops as3711_sd_ops = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.list_voltage = as3711_list_voltage_sd,
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.map_voltage = as3711_map_voltage_sd,
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.get_mode = as3711_get_mode_sd,
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.set_mode = as3711_set_mode_sd,
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};
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static struct regulator_ops as3711_aldo_ops = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.list_voltage = as3711_list_voltage_aldo,
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.map_voltage = as3711_map_voltage_aldo,
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};
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static struct regulator_ops as3711_dldo_ops = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.list_voltage = as3711_list_voltage_dldo,
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.map_voltage = as3711_map_voltage_dldo,
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};
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#define AS3711_REG(_id, _en_reg, _en_bit, _vmask, _vshift, _min_uV, _max_uV, _sfx) \
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[AS3711_REGULATOR_ ## _id] = { \
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.desc = { \
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.name = "as3711-regulator-" # _id, \
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.id = AS3711_REGULATOR_ ## _id, \
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.n_voltages = (_vmask + 1), \
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.ops = &as3711_ ## _sfx ## _ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.vsel_reg = AS3711_ ## _id ## _VOLTAGE, \
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.vsel_mask = _vmask << _vshift, \
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.enable_reg = AS3711_ ## _en_reg, \
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.enable_mask = BIT(_en_bit), \
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.min_uV = _min_uV, \
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}, \
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.max_uV = _max_uV, \
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}
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static struct as3711_regulator_info as3711_reg_info[] = {
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AS3711_REG(SD_1, SD_CONTROL, 0, 0x7f, 0, 612500, 3350000, sd),
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AS3711_REG(SD_2, SD_CONTROL, 1, 0x7f, 0, 612500, 3350000, sd),
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AS3711_REG(SD_3, SD_CONTROL, 2, 0x7f, 0, 612500, 3350000, sd),
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AS3711_REG(SD_4, SD_CONTROL, 3, 0x7f, 0, 612500, 3350000, sd),
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AS3711_REG(LDO_1, LDO_1_VOLTAGE, 7, 0x1f, 0, 1200000, 3300000, aldo),
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AS3711_REG(LDO_2, LDO_2_VOLTAGE, 7, 0x1f, 0, 1200000, 3300000, aldo),
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AS3711_REG(LDO_3, LDO_3_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
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AS3711_REG(LDO_4, LDO_4_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
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AS3711_REG(LDO_5, LDO_5_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
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AS3711_REG(LDO_6, LDO_6_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
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AS3711_REG(LDO_7, LDO_7_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
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AS3711_REG(LDO_8, LDO_8_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
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/* StepUp output voltage depends on supplying regulator */
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};
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#define AS3711_REGULATOR_NUM ARRAY_SIZE(as3711_reg_info)
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static int as3711_regulator_probe(struct platform_device *pdev)
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{
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struct as3711_regulator_pdata *pdata = dev_get_platdata(&pdev->dev);
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struct as3711 *as3711 = dev_get_drvdata(pdev->dev.parent);
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struct regulator_init_data *reg_data;
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struct regulator_config config = {.dev = &pdev->dev,};
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struct as3711_regulator *reg = NULL;
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struct as3711_regulator *regs;
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struct regulator_dev *rdev;
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struct as3711_regulator_info *ri;
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int ret;
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int id;
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if (!pdata)
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dev_dbg(&pdev->dev, "No platform data...\n");
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regs = devm_kzalloc(&pdev->dev, AS3711_REGULATOR_NUM *
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sizeof(struct as3711_regulator), GFP_KERNEL);
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if (!regs) {
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dev_err(&pdev->dev, "Memory allocation failed exiting..\n");
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return -ENOMEM;
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}
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for (id = 0, ri = as3711_reg_info; id < AS3711_REGULATOR_NUM; ++id, ri++) {
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reg_data = pdata ? pdata->init_data[id] : NULL;
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/* No need to register if there is no regulator data */
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if (!reg_data)
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continue;
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reg = ®s[id];
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reg->reg_info = ri;
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config.init_data = reg_data;
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config.driver_data = reg;
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config.regmap = as3711->regmap;
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rdev = regulator_register(&ri->desc, &config);
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if (IS_ERR(rdev)) {
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dev_err(&pdev->dev, "Failed to register regulator %s\n",
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ri->desc.name);
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ret = PTR_ERR(rdev);
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goto eregreg;
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}
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reg->rdev = rdev;
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}
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platform_set_drvdata(pdev, regs);
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return 0;
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eregreg:
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while (--id >= 0)
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regulator_unregister(regs[id].rdev);
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return ret;
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}
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static int as3711_regulator_remove(struct platform_device *pdev)
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{
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struct as3711_regulator *regs = platform_get_drvdata(pdev);
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int id;
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for (id = 0; id < AS3711_REGULATOR_NUM; ++id)
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regulator_unregister(regs[id].rdev);
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return 0;
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}
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static struct platform_driver as3711_regulator_driver = {
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.driver = {
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.name = "as3711-regulator",
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.owner = THIS_MODULE,
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},
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.probe = as3711_regulator_probe,
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.remove = as3711_regulator_remove,
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};
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static int __init as3711_regulator_init(void)
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{
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return platform_driver_register(&as3711_regulator_driver);
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}
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subsys_initcall(as3711_regulator_init);
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static void __exit as3711_regulator_exit(void)
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{
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platform_driver_unregister(&as3711_regulator_driver);
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}
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module_exit(as3711_regulator_exit);
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MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
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MODULE_DESCRIPTION("AS3711 regulator driver");
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MODULE_ALIAS("platform:as3711-regulator");
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MODULE_LICENSE("GPL v2");
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