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28c4f730d2
The step values for some of the LDOs appears to be incorrect, resulting in incorrect voltages (or at least, ones which are different from the Samsung 3.4 vendor kernel). Signed-off-by: Stuart Menefy <stuart.menefy@mathembedded.com> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
416 lines
11 KiB
C
416 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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//
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// Copyright (c) 2013 Samsung Electronics Co., Ltd
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// http://www.samsung.com
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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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struct of_regulator_match rdata[S2MPA01_REGULATOR_MAX];
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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_get_id(rdev)) {
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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_get_id(rdev)) {
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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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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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/* Ramp delay can be enabled/disabled only for buck[1234] */
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if (rdev_get_id(rdev) >= S2MPA01_BUCK1 &&
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rdev_get_id(rdev) <= S2MPA01_BUCK4) {
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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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}
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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 const 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 const 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_ldo(num, step) { \
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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 = MIN_800_MV, \
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.uV_step = step, \
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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 = MIN_600_MV, \
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.uV_step = STEP_6_25_MV, \
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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 = MIN_800_MV, \
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.uV_step = STEP_6_25_MV, \
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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_10(num, min, step) { \
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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 = min, \
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.uV_step = step, \
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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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static const struct regulator_desc regulators[] = {
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regulator_desc_ldo(1, STEP_25_MV),
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regulator_desc_ldo(2, STEP_50_MV),
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regulator_desc_ldo(3, STEP_50_MV),
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regulator_desc_ldo(4, STEP_50_MV),
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regulator_desc_ldo(5, STEP_25_MV),
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regulator_desc_ldo(6, STEP_25_MV),
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regulator_desc_ldo(7, STEP_50_MV),
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regulator_desc_ldo(8, STEP_50_MV),
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regulator_desc_ldo(9, STEP_50_MV),
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regulator_desc_ldo(10, STEP_50_MV),
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regulator_desc_ldo(11, STEP_50_MV),
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regulator_desc_ldo(12, STEP_50_MV),
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regulator_desc_ldo(13, STEP_50_MV),
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regulator_desc_ldo(14, STEP_50_MV),
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regulator_desc_ldo(15, STEP_50_MV),
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regulator_desc_ldo(16, STEP_50_MV),
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regulator_desc_ldo(17, STEP_50_MV),
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regulator_desc_ldo(18, STEP_50_MV),
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regulator_desc_ldo(19, STEP_50_MV),
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regulator_desc_ldo(20, STEP_50_MV),
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regulator_desc_ldo(21, STEP_50_MV),
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regulator_desc_ldo(22, STEP_50_MV),
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regulator_desc_ldo(23, STEP_50_MV),
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regulator_desc_ldo(24, STEP_50_MV),
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regulator_desc_ldo(25, STEP_50_MV),
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regulator_desc_ldo(26, STEP_25_MV),
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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_10(6, MIN_600_MV, STEP_6_25_MV),
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regulator_desc_buck6_10(7, MIN_600_MV, STEP_6_25_MV),
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regulator_desc_buck6_10(8, MIN_800_MV, STEP_12_5_MV),
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regulator_desc_buck6_10(9, MIN_1500_MV, STEP_12_5_MV),
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regulator_desc_buck6_10(10, MIN_1000_MV, STEP_12_5_MV),
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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 device_node *reg_np = NULL;
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struct regulator_config config = { };
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struct of_regulator_match *rdata;
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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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rdata = s2mpa01->rdata;
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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,
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S2MPA01_REGULATOR_MAX);
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of_node_put(reg_np);
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}
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platform_set_drvdata(pdev, s2mpa01);
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config.dev = &pdev->dev;
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config.regmap = iodev->regmap_pmic;
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config.driver_data = s2mpa01;
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for (i = 0; i < S2MPA01_REGULATOR_MAX; i++) {
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struct regulator_dev *rdev;
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if (pdata)
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config.init_data = pdata->regulators[i].initdata;
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else
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config.init_data = rdata[i].init_data;
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if (reg_np)
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config.of_node = rdata[i].of_node;
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rdev = devm_regulator_register(&pdev->dev,
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®ulators[i], &config);
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if (IS_ERR(rdev)) {
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dev_err(&pdev->dev, "regulator init failed for %d\n",
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i);
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return PTR_ERR(rdev);
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}
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}
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return 0;
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}
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static const struct platform_device_id s2mpa01_pmic_id[] = {
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{ "s2mpa01-pmic", 0},
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{ },
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};
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MODULE_DEVICE_TABLE(platform, s2mpa01_pmic_id);
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static struct platform_driver s2mpa01_pmic_driver = {
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.driver = {
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.name = "s2mpa01-pmic",
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},
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.probe = s2mpa01_pmic_probe,
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.id_table = s2mpa01_pmic_id,
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};
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module_platform_driver(s2mpa01_pmic_driver);
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/* Module information */
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MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
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MODULE_AUTHOR("Sachin Kamat <sachin.kamat@samsung.com>");
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MODULE_DESCRIPTION("SAMSUNG S2MPA01 Regulator Driver");
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MODULE_LICENSE("GPL");
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