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https://github.com/edk2-porting/linux-next.git
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90068348b7
This patch makes driver to use uV/us as units of ramp_delay. It makes driver in compliance with regulator framework and make ramp rate precise. This patch also sets default ramp rate in regulator descriptor which can be used in case if case ramp rate is not set in regulator constraints. Signed-off-by: Yadwinder Singh Brar <yadi.brar@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
357 lines
9.9 KiB
C
357 lines
9.9 KiB
C
/*
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* s2mps11.c
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*
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* Copyright (c) 2012 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/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/mfd/samsung/core.h>
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#include <linux/mfd/samsung/s2mps11.h>
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struct s2mps11_info {
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struct regulator_dev *rdev[S2MPS11_REGULATOR_MAX];
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int ramp_delay2;
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int ramp_delay34;
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int ramp_delay5;
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int ramp_delay16;
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int ramp_delay7810;
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int ramp_delay9;
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bool buck6_ramp;
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bool buck2_ramp;
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bool buck3_ramp;
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bool buck4_ramp;
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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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return cnt;
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}
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static struct regulator_ops s2mps11_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 s2mps11_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 = regulator_set_voltage_time_sel,
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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 = S2MPS11_LDO##num, \
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.ops = &s2mps11_ldo_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = S2MPS11_LDO_MIN, \
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.uV_step = S2MPS11_LDO_STEP1, \
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.n_voltages = S2MPS11_LDO_N_VOLTAGES, \
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.vsel_reg = S2MPS11_REG_L1CTRL + num - 1, \
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.vsel_mask = S2MPS11_LDO_VSEL_MASK, \
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.enable_reg = S2MPS11_REG_L1CTRL + num - 1, \
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.enable_mask = S2MPS11_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 = S2MPS11_LDO##num, \
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.ops = &s2mps11_ldo_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = S2MPS11_LDO_MIN, \
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.uV_step = S2MPS11_LDO_STEP2, \
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.n_voltages = S2MPS11_LDO_N_VOLTAGES, \
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.vsel_reg = S2MPS11_REG_L1CTRL + num - 1, \
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.vsel_mask = S2MPS11_LDO_VSEL_MASK, \
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.enable_reg = S2MPS11_REG_L1CTRL + num - 1, \
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.enable_mask = S2MPS11_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 = S2MPS11_BUCK##num, \
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.ops = &s2mps11_buck_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = S2MPS11_BUCK_MIN1, \
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.uV_step = S2MPS11_BUCK_STEP1, \
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.n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
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.ramp_delay = S2MPS11_RAMP_DELAY, \
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.vsel_reg = S2MPS11_REG_B1CTRL2 + (num - 1) * 2, \
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.vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
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.enable_reg = S2MPS11_REG_B1CTRL1 + (num - 1) * 2, \
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.enable_mask = S2MPS11_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 = S2MPS11_BUCK5, \
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.ops = &s2mps11_buck_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = S2MPS11_BUCK_MIN1, \
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.uV_step = S2MPS11_BUCK_STEP1, \
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.n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
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.ramp_delay = S2MPS11_RAMP_DELAY, \
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.vsel_reg = S2MPS11_REG_B5CTRL2, \
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.vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
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.enable_reg = S2MPS11_REG_B5CTRL1, \
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.enable_mask = S2MPS11_ENABLE_MASK \
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}
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#define regulator_desc_buck6_8(num) { \
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.name = "BUCK"#num, \
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.id = S2MPS11_BUCK##num, \
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.ops = &s2mps11_buck_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = S2MPS11_BUCK_MIN1, \
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.uV_step = S2MPS11_BUCK_STEP1, \
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.n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
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.ramp_delay = S2MPS11_RAMP_DELAY, \
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.vsel_reg = S2MPS11_REG_B6CTRL2 + (num - 6) * 2, \
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.vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
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.enable_reg = S2MPS11_REG_B6CTRL1 + (num - 6) * 2, \
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.enable_mask = S2MPS11_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 = S2MPS11_BUCK9, \
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.ops = &s2mps11_buck_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = S2MPS11_BUCK_MIN3, \
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.uV_step = S2MPS11_BUCK_STEP3, \
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.n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
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.ramp_delay = S2MPS11_RAMP_DELAY, \
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.vsel_reg = S2MPS11_REG_B9CTRL2, \
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.vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
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.enable_reg = S2MPS11_REG_B9CTRL1, \
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.enable_mask = S2MPS11_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 = S2MPS11_BUCK10, \
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.ops = &s2mps11_buck_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = S2MPS11_BUCK_MIN2, \
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.uV_step = S2MPS11_BUCK_STEP2, \
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.n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
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.ramp_delay = S2MPS11_RAMP_DELAY, \
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.vsel_reg = S2MPS11_REG_B10CTRL2, \
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.vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
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.enable_reg = S2MPS11_REG_B10CTRL1, \
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.enable_mask = S2MPS11_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_ldo2(27),
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regulator_desc_ldo1(28),
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regulator_desc_ldo1(29),
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regulator_desc_ldo1(30),
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regulator_desc_ldo1(31),
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regulator_desc_ldo1(32),
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regulator_desc_ldo1(33),
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regulator_desc_ldo1(34),
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regulator_desc_ldo1(35),
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regulator_desc_ldo1(36),
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regulator_desc_ldo1(37),
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regulator_desc_ldo1(38),
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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_8(6),
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regulator_desc_buck6_8(7),
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regulator_desc_buck6_8(8),
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regulator_desc_buck9,
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regulator_desc_buck10,
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};
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static int s2mps11_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 regulator_config config = { };
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struct s2mps11_info *s2mps11;
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int i, ret;
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unsigned char ramp_enable, ramp_reg = 0;
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if (!pdata) {
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dev_err(pdev->dev.parent, "Platform data not supplied\n");
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return -ENODEV;
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}
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s2mps11 = devm_kzalloc(&pdev->dev, sizeof(struct s2mps11_info),
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GFP_KERNEL);
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if (!s2mps11)
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return -ENOMEM;
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platform_set_drvdata(pdev, s2mps11);
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s2mps11->ramp_delay2 = pdata->buck2_ramp_delay;
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s2mps11->ramp_delay34 = pdata->buck34_ramp_delay;
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s2mps11->ramp_delay5 = pdata->buck5_ramp_delay;
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s2mps11->ramp_delay16 = pdata->buck16_ramp_delay;
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s2mps11->ramp_delay7810 = pdata->buck7810_ramp_delay;
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s2mps11->ramp_delay9 = pdata->buck9_ramp_delay;
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s2mps11->buck6_ramp = pdata->buck6_ramp_enable;
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s2mps11->buck2_ramp = pdata->buck2_ramp_enable;
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s2mps11->buck3_ramp = pdata->buck3_ramp_enable;
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s2mps11->buck4_ramp = pdata->buck4_ramp_enable;
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ramp_enable = (s2mps11->buck2_ramp << 3) | (s2mps11->buck3_ramp << 2) |
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(s2mps11->buck4_ramp << 1) | s2mps11->buck6_ramp ;
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if (ramp_enable) {
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if (s2mps11->buck2_ramp)
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ramp_reg |= get_ramp_delay(s2mps11->ramp_delay2) << 6;
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if (s2mps11->buck3_ramp || s2mps11->buck4_ramp)
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ramp_reg |= get_ramp_delay(s2mps11->ramp_delay34) << 4;
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sec_reg_write(iodev, S2MPS11_REG_RAMP, ramp_reg | ramp_enable);
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}
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ramp_reg &= 0x00;
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ramp_reg |= get_ramp_delay(s2mps11->ramp_delay5) << 6;
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ramp_reg |= get_ramp_delay(s2mps11->ramp_delay16) << 4;
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ramp_reg |= get_ramp_delay(s2mps11->ramp_delay7810) << 2;
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ramp_reg |= get_ramp_delay(s2mps11->ramp_delay9);
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sec_reg_write(iodev, S2MPS11_REG_RAMP_BUCK, ramp_reg);
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for (i = 0; i < S2MPS11_REGULATOR_MAX; i++) {
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config.dev = &pdev->dev;
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config.regmap = iodev->regmap;
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config.init_data = pdata->regulators[i].initdata;
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config.driver_data = s2mps11;
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s2mps11->rdev[i] = regulator_register(®ulators[i], &config);
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if (IS_ERR(s2mps11->rdev[i])) {
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ret = PTR_ERR(s2mps11->rdev[i]);
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dev_err(&pdev->dev, "regulator init failed for %d\n",
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i);
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s2mps11->rdev[i] = NULL;
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goto err;
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}
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}
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return 0;
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err:
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for (i = 0; i < S2MPS11_REGULATOR_MAX; i++)
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regulator_unregister(s2mps11->rdev[i]);
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return ret;
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}
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static int s2mps11_pmic_remove(struct platform_device *pdev)
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{
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struct s2mps11_info *s2mps11 = platform_get_drvdata(pdev);
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int i;
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for (i = 0; i < S2MPS11_REGULATOR_MAX; i++)
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regulator_unregister(s2mps11->rdev[i]);
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return 0;
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}
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static const struct platform_device_id s2mps11_pmic_id[] = {
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{ "s2mps11-pmic", 0},
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{ },
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};
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MODULE_DEVICE_TABLE(platform, s2mps11_pmic_id);
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static struct platform_driver s2mps11_pmic_driver = {
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.driver = {
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.name = "s2mps11-pmic",
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.owner = THIS_MODULE,
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},
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.probe = s2mps11_pmic_probe,
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.remove = s2mps11_pmic_remove,
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.id_table = s2mps11_pmic_id,
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};
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static int __init s2mps11_pmic_init(void)
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{
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return platform_driver_register(&s2mps11_pmic_driver);
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}
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subsys_initcall(s2mps11_pmic_init);
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static void __exit s2mps11_pmic_exit(void)
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{
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platform_driver_unregister(&s2mps11_pmic_driver);
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}
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module_exit(s2mps11_pmic_exit);
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/* Module information */
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MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
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MODULE_DESCRIPTION("SAMSUNG S2MPS11 Regulator Driver");
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MODULE_LICENSE("GPL");
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