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f7b1a8dc1c
Current code misses updating the register when enable_shift is 0. e.g. S2MPA01_BUCK4_RAMP_EN_SHIFT is 0. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
480 lines
13 KiB
C
480 lines
13 KiB
C
/*
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* Copyright (c) 2013 Samsung Electronics Co., Ltd
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* http://www.samsung.com
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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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*/
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#include <linux/bug.h>
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/regmap.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/regulator/of_regulator.h>
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#include <linux/mfd/samsung/core.h>
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#include <linux/mfd/samsung/s2mpa01.h>
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#define S2MPA01_REGULATOR_CNT ARRAY_SIZE(regulators)
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struct s2mpa01_info {
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int ramp_delay24;
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int ramp_delay3;
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int ramp_delay5;
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int ramp_delay16;
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int ramp_delay7;
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int ramp_delay8910;
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};
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static int get_ramp_delay(int ramp_delay)
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{
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unsigned char cnt = 0;
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ramp_delay /= 6250;
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while (true) {
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ramp_delay = ramp_delay >> 1;
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if (ramp_delay == 0)
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break;
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cnt++;
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}
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if (cnt > 3)
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cnt = 3;
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return cnt;
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}
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static int s2mpa01_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
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unsigned int old_selector,
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unsigned int new_selector)
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{
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struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev);
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unsigned int ramp_delay = 0;
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int old_volt, new_volt;
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switch (rdev->desc->id) {
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case S2MPA01_BUCK2:
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case S2MPA01_BUCK4:
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ramp_delay = s2mpa01->ramp_delay24;
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break;
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case S2MPA01_BUCK3:
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ramp_delay = s2mpa01->ramp_delay3;
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break;
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case S2MPA01_BUCK5:
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ramp_delay = s2mpa01->ramp_delay5;
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break;
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case S2MPA01_BUCK1:
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case S2MPA01_BUCK6:
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ramp_delay = s2mpa01->ramp_delay16;
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break;
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case S2MPA01_BUCK7:
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ramp_delay = s2mpa01->ramp_delay7;
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break;
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case S2MPA01_BUCK8:
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case S2MPA01_BUCK9:
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case S2MPA01_BUCK10:
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ramp_delay = s2mpa01->ramp_delay8910;
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break;
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}
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if (ramp_delay == 0)
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ramp_delay = rdev->desc->ramp_delay;
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old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector);
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new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector);
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return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay);
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}
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static int s2mpa01_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
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{
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struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev);
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unsigned int ramp_val, ramp_shift, ramp_reg = S2MPA01_REG_RAMP2;
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unsigned int ramp_enable = 1, enable_shift = 0;
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int ret;
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switch (rdev->desc->id) {
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case S2MPA01_BUCK1:
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enable_shift = S2MPA01_BUCK1_RAMP_EN_SHIFT;
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if (!ramp_delay) {
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ramp_enable = 0;
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break;
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}
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if (ramp_delay > s2mpa01->ramp_delay16)
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s2mpa01->ramp_delay16 = ramp_delay;
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else
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ramp_delay = s2mpa01->ramp_delay16;
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ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT;
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ramp_reg = S2MPA01_REG_RAMP1;
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break;
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case S2MPA01_BUCK2:
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enable_shift = S2MPA01_BUCK2_RAMP_EN_SHIFT;
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if (!ramp_delay) {
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ramp_enable = 0;
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break;
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}
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if (ramp_delay > s2mpa01->ramp_delay24)
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s2mpa01->ramp_delay24 = ramp_delay;
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else
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ramp_delay = s2mpa01->ramp_delay24;
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ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT;
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ramp_reg = S2MPA01_REG_RAMP1;
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break;
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case S2MPA01_BUCK3:
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enable_shift = S2MPA01_BUCK3_RAMP_EN_SHIFT;
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if (!ramp_delay) {
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ramp_enable = 0;
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break;
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}
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s2mpa01->ramp_delay3 = ramp_delay;
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ramp_shift = S2MPA01_BUCK3_RAMP_SHIFT;
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ramp_reg = S2MPA01_REG_RAMP1;
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break;
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case S2MPA01_BUCK4:
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enable_shift = S2MPA01_BUCK4_RAMP_EN_SHIFT;
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if (!ramp_delay) {
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ramp_enable = 0;
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break;
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}
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if (ramp_delay > s2mpa01->ramp_delay24)
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s2mpa01->ramp_delay24 = ramp_delay;
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else
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ramp_delay = s2mpa01->ramp_delay24;
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ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT;
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ramp_reg = S2MPA01_REG_RAMP1;
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break;
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case S2MPA01_BUCK5:
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s2mpa01->ramp_delay5 = ramp_delay;
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ramp_shift = S2MPA01_BUCK5_RAMP_SHIFT;
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break;
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case S2MPA01_BUCK6:
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if (ramp_delay > s2mpa01->ramp_delay16)
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s2mpa01->ramp_delay16 = ramp_delay;
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else
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ramp_delay = s2mpa01->ramp_delay16;
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ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT;
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break;
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case S2MPA01_BUCK7:
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s2mpa01->ramp_delay7 = ramp_delay;
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ramp_shift = S2MPA01_BUCK7_RAMP_SHIFT;
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break;
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case S2MPA01_BUCK8:
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case S2MPA01_BUCK9:
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case S2MPA01_BUCK10:
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if (ramp_delay > s2mpa01->ramp_delay8910)
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s2mpa01->ramp_delay8910 = ramp_delay;
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else
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ramp_delay = s2mpa01->ramp_delay8910;
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ramp_shift = S2MPA01_BUCK8910_RAMP_SHIFT;
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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 (!ramp_enable)
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goto ramp_disable;
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ret = regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1,
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1 << enable_shift, 1 << enable_shift);
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if (ret) {
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dev_err(&rdev->dev, "failed to enable ramp rate\n");
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return ret;
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}
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ramp_val = get_ramp_delay(ramp_delay);
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return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift,
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ramp_val << ramp_shift);
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ramp_disable:
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return regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1,
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1 << enable_shift, 0);
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}
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static struct regulator_ops s2mpa01_ldo_ops = {
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.list_voltage = regulator_list_voltage_linear,
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.map_voltage = regulator_map_voltage_linear,
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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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.set_voltage_time_sel = regulator_set_voltage_time_sel,
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};
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static struct regulator_ops s2mpa01_buck_ops = {
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.list_voltage = regulator_list_voltage_linear,
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.map_voltage = regulator_map_voltage_linear,
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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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.set_voltage_time_sel = s2mpa01_regulator_set_voltage_time_sel,
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.set_ramp_delay = s2mpa01_set_ramp_delay,
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};
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#define regulator_desc_ldo1(num) { \
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.name = "LDO"#num, \
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.id = S2MPA01_LDO##num, \
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.ops = &s2mpa01_ldo_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = S2MPA01_LDO_MIN, \
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.uV_step = S2MPA01_LDO_STEP1, \
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.n_voltages = S2MPA01_LDO_N_VOLTAGES, \
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.vsel_reg = S2MPA01_REG_L1CTRL + num - 1, \
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.vsel_mask = S2MPA01_LDO_VSEL_MASK, \
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.enable_reg = S2MPA01_REG_L1CTRL + num - 1, \
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.enable_mask = S2MPA01_ENABLE_MASK \
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}
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#define regulator_desc_ldo2(num) { \
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.name = "LDO"#num, \
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.id = S2MPA01_LDO##num, \
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.ops = &s2mpa01_ldo_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = S2MPA01_LDO_MIN, \
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.uV_step = S2MPA01_LDO_STEP2, \
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.n_voltages = S2MPA01_LDO_N_VOLTAGES, \
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.vsel_reg = S2MPA01_REG_L1CTRL + num - 1, \
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.vsel_mask = S2MPA01_LDO_VSEL_MASK, \
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.enable_reg = S2MPA01_REG_L1CTRL + num - 1, \
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.enable_mask = S2MPA01_ENABLE_MASK \
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}
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#define regulator_desc_buck1_4(num) { \
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.name = "BUCK"#num, \
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.id = S2MPA01_BUCK##num, \
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.ops = &s2mpa01_buck_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = S2MPA01_BUCK_MIN1, \
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.uV_step = S2MPA01_BUCK_STEP1, \
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.n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
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.ramp_delay = S2MPA01_RAMP_DELAY, \
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.vsel_reg = S2MPA01_REG_B1CTRL2 + (num - 1) * 2, \
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.vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
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.enable_reg = S2MPA01_REG_B1CTRL1 + (num - 1) * 2, \
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.enable_mask = S2MPA01_ENABLE_MASK \
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}
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#define regulator_desc_buck5 { \
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.name = "BUCK5", \
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.id = S2MPA01_BUCK5, \
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.ops = &s2mpa01_buck_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = S2MPA01_BUCK_MIN2, \
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.uV_step = S2MPA01_BUCK_STEP1, \
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.n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
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.ramp_delay = S2MPA01_RAMP_DELAY, \
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.vsel_reg = S2MPA01_REG_B5CTRL2, \
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.vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
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.enable_reg = S2MPA01_REG_B5CTRL1, \
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.enable_mask = S2MPA01_ENABLE_MASK \
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}
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#define regulator_desc_buck6_7(num) { \
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.name = "BUCK"#num, \
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.id = S2MPA01_BUCK##num, \
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.ops = &s2mpa01_buck_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = S2MPA01_BUCK_MIN1, \
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.uV_step = S2MPA01_BUCK_STEP1, \
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.n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
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.ramp_delay = S2MPA01_RAMP_DELAY, \
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.vsel_reg = S2MPA01_REG_B6CTRL2 + (num - 6) * 2, \
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.vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
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.enable_reg = S2MPA01_REG_B6CTRL1 + (num - 6) * 2, \
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.enable_mask = S2MPA01_ENABLE_MASK \
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}
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#define regulator_desc_buck8 { \
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.name = "BUCK8", \
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.id = S2MPA01_BUCK8, \
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.ops = &s2mpa01_buck_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = S2MPA01_BUCK_MIN2, \
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.uV_step = S2MPA01_BUCK_STEP2, \
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.n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
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.ramp_delay = S2MPA01_RAMP_DELAY, \
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.vsel_reg = S2MPA01_REG_B8CTRL2, \
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.vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
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.enable_reg = S2MPA01_REG_B8CTRL1, \
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.enable_mask = S2MPA01_ENABLE_MASK \
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}
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#define regulator_desc_buck9 { \
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.name = "BUCK9", \
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.id = S2MPA01_BUCK9, \
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.ops = &s2mpa01_buck_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = S2MPA01_BUCK_MIN4, \
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.uV_step = S2MPA01_BUCK_STEP2, \
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.n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
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.ramp_delay = S2MPA01_RAMP_DELAY, \
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.vsel_reg = S2MPA01_REG_B9CTRL2, \
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.vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
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.enable_reg = S2MPA01_REG_B9CTRL1, \
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.enable_mask = S2MPA01_ENABLE_MASK \
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}
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#define regulator_desc_buck10 { \
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.name = "BUCK10", \
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.id = S2MPA01_BUCK10, \
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.ops = &s2mpa01_buck_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = S2MPA01_BUCK_MIN3, \
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.uV_step = S2MPA01_BUCK_STEP2, \
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.n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
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.ramp_delay = S2MPA01_RAMP_DELAY, \
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.vsel_reg = S2MPA01_REG_B10CTRL2, \
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.vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
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.enable_reg = S2MPA01_REG_B10CTRL1, \
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.enable_mask = S2MPA01_ENABLE_MASK \
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}
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static struct regulator_desc regulators[] = {
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regulator_desc_ldo2(1),
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regulator_desc_ldo1(2),
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regulator_desc_ldo1(3),
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regulator_desc_ldo1(4),
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regulator_desc_ldo1(5),
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regulator_desc_ldo2(6),
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regulator_desc_ldo1(7),
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regulator_desc_ldo1(8),
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regulator_desc_ldo1(9),
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regulator_desc_ldo1(10),
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regulator_desc_ldo2(11),
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regulator_desc_ldo1(12),
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regulator_desc_ldo1(13),
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regulator_desc_ldo1(14),
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regulator_desc_ldo1(15),
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regulator_desc_ldo1(16),
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regulator_desc_ldo1(17),
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regulator_desc_ldo1(18),
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regulator_desc_ldo1(19),
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regulator_desc_ldo1(20),
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regulator_desc_ldo1(21),
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regulator_desc_ldo2(22),
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regulator_desc_ldo2(23),
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regulator_desc_ldo1(24),
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regulator_desc_ldo1(25),
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regulator_desc_ldo1(26),
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regulator_desc_buck1_4(1),
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regulator_desc_buck1_4(2),
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regulator_desc_buck1_4(3),
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regulator_desc_buck1_4(4),
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regulator_desc_buck5,
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regulator_desc_buck6_7(6),
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regulator_desc_buck6_7(7),
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regulator_desc_buck8,
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regulator_desc_buck9,
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regulator_desc_buck10,
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};
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static int s2mpa01_pmic_probe(struct platform_device *pdev)
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{
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struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
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struct sec_platform_data *pdata = dev_get_platdata(iodev->dev);
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struct of_regulator_match rdata[S2MPA01_REGULATOR_MAX];
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struct device_node *reg_np = NULL;
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struct regulator_config config = { };
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struct s2mpa01_info *s2mpa01;
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int i;
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s2mpa01 = devm_kzalloc(&pdev->dev, sizeof(*s2mpa01), GFP_KERNEL);
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if (!s2mpa01)
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return -ENOMEM;
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for (i = 0; i < S2MPA01_REGULATOR_CNT; i++)
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rdata[i].name = regulators[i].name;
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if (iodev->dev->of_node) {
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reg_np = of_get_child_by_name(iodev->dev->of_node,
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"regulators");
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if (!reg_np) {
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dev_err(&pdev->dev,
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"could not find regulators sub-node\n");
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return -EINVAL;
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}
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of_regulator_match(&pdev->dev, reg_np, rdata,
|
|
S2MPA01_REGULATOR_MAX);
|
|
of_node_put(reg_np);
|
|
}
|
|
|
|
platform_set_drvdata(pdev, s2mpa01);
|
|
|
|
config.dev = &pdev->dev;
|
|
config.regmap = iodev->regmap_pmic;
|
|
config.driver_data = s2mpa01;
|
|
|
|
for (i = 0; i < S2MPA01_REGULATOR_MAX; i++) {
|
|
struct regulator_dev *rdev;
|
|
if (pdata)
|
|
config.init_data = pdata->regulators[i].initdata;
|
|
else
|
|
config.init_data = rdata[i].init_data;
|
|
|
|
if (reg_np)
|
|
config.of_node = rdata[i].of_node;
|
|
|
|
rdev = devm_regulator_register(&pdev->dev,
|
|
®ulators[i], &config);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(&pdev->dev, "regulator init failed for %d\n",
|
|
i);
|
|
return PTR_ERR(rdev);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id s2mpa01_pmic_id[] = {
|
|
{ "s2mpa01-pmic", 0},
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, s2mpa01_pmic_id);
|
|
|
|
static struct platform_driver s2mpa01_pmic_driver = {
|
|
.driver = {
|
|
.name = "s2mpa01-pmic",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = s2mpa01_pmic_probe,
|
|
.id_table = s2mpa01_pmic_id,
|
|
};
|
|
|
|
module_platform_driver(s2mpa01_pmic_driver);
|
|
|
|
/* Module information */
|
|
MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
|
|
MODULE_AUTHOR("Sachin Kamat <sachin.kamat@samsung.com>");
|
|
MODULE_DESCRIPTION("SAMSUNG S2MPA01 Regulator Driver");
|
|
MODULE_LICENSE("GPL");
|