646 lines
18 KiB
C
646 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2018 ROHM Semiconductors
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// bd71837-regulator.c ROHM BD71837MWV regulator driver
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mfd/rohm-bd718x7.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/regulator/of_regulator.h>
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#include <linux/slab.h>
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struct bd71837_pmic {
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struct regulator_desc descs[BD71837_REGULATOR_CNT];
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struct bd71837 *mfd;
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struct platform_device *pdev;
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struct regulator_dev *rdev[BD71837_REGULATOR_CNT];
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};
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/*
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* BUCK1/2/3/4
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* BUCK1RAMPRATE[1:0] BUCK1 DVS ramp rate setting
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* 00: 10.00mV/usec 10mV 1uS
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* 01: 5.00mV/usec 10mV 2uS
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* 10: 2.50mV/usec 10mV 4uS
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* 11: 1.25mV/usec 10mV 8uS
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*/
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static int bd71837_buck1234_set_ramp_delay(struct regulator_dev *rdev,
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int ramp_delay)
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{
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struct bd71837_pmic *pmic = rdev_get_drvdata(rdev);
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struct bd71837 *mfd = pmic->mfd;
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int id = rdev->desc->id;
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unsigned int ramp_value = BUCK_RAMPRATE_10P00MV;
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dev_dbg(&pmic->pdev->dev, "Buck[%d] Set Ramp = %d\n", id + 1,
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ramp_delay);
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switch (ramp_delay) {
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case 1 ... 1250:
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ramp_value = BUCK_RAMPRATE_1P25MV;
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break;
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case 1251 ... 2500:
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ramp_value = BUCK_RAMPRATE_2P50MV;
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break;
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case 2501 ... 5000:
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ramp_value = BUCK_RAMPRATE_5P00MV;
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break;
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case 5001 ... 10000:
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ramp_value = BUCK_RAMPRATE_10P00MV;
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break;
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default:
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ramp_value = BUCK_RAMPRATE_10P00MV;
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dev_err(&pmic->pdev->dev,
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"%s: ramp_delay: %d not supported, setting 10000mV//us\n",
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rdev->desc->name, ramp_delay);
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}
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return regmap_update_bits(mfd->regmap, BD71837_REG_BUCK1_CTRL + id,
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BUCK_RAMPRATE_MASK, ramp_value << 6);
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}
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/* Bucks 1 to 4 support DVS. PWM mode is used when voltage is changed.
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* Bucks 5 to 8 and LDOs can use PFM and must be disabled when voltage
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* is changed. Hence we return -EBUSY for these if voltage is changed
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* when BUCK/LDO is enabled.
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*/
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static int bd71837_set_voltage_sel_restricted(struct regulator_dev *rdev,
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unsigned int sel)
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{
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if (regulator_is_enabled_regmap(rdev))
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return -EBUSY;
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return regulator_set_voltage_sel_regmap(rdev, sel);
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}
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static struct regulator_ops bd71837_ldo_regulator_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.list_voltage = regulator_list_voltage_linear_range,
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.set_voltage_sel = bd71837_set_voltage_sel_restricted,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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};
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static struct regulator_ops bd71837_ldo_regulator_nolinear_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.list_voltage = regulator_list_voltage_table,
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.set_voltage_sel = bd71837_set_voltage_sel_restricted,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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};
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static struct regulator_ops bd71837_buck_regulator_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.list_voltage = regulator_list_voltage_linear_range,
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.set_voltage_sel = bd71837_set_voltage_sel_restricted,
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.get_voltage_sel = regulator_get_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 bd71837_buck_regulator_nolinear_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.list_voltage = regulator_list_voltage_table,
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.set_voltage_sel = bd71837_set_voltage_sel_restricted,
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.get_voltage_sel = regulator_get_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 bd71837_buck1234_regulator_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.list_voltage = regulator_list_voltage_linear_range,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_time_sel = regulator_set_voltage_time_sel,
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.set_ramp_delay = bd71837_buck1234_set_ramp_delay,
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};
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/*
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* BUCK1/2/3/4
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* 0.70 to 1.30V (10mV step)
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*/
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static const struct regulator_linear_range bd71837_buck1234_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(700000, 0x00, 0x3C, 10000),
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REGULATOR_LINEAR_RANGE(1300000, 0x3D, 0x3F, 0),
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};
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/*
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* BUCK5
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* 0.9V to 1.35V ()
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*/
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static const struct regulator_linear_range bd71837_buck5_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(700000, 0x00, 0x03, 100000),
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REGULATOR_LINEAR_RANGE(1050000, 0x04, 0x05, 50000),
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REGULATOR_LINEAR_RANGE(1200000, 0x06, 0x07, 150000),
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};
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/*
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* BUCK6
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* 3.0V to 3.3V (step 100mV)
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*/
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static const struct regulator_linear_range bd71837_buck6_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
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};
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/*
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* BUCK7
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* 000 = 1.605V
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* 001 = 1.695V
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* 010 = 1.755V
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* 011 = 1.8V (Initial)
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* 100 = 1.845V
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* 101 = 1.905V
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* 110 = 1.95V
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* 111 = 1.995V
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*/
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static const unsigned int buck_7_volts[] = {
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1605000, 1695000, 1755000, 1800000, 1845000, 1905000, 1950000, 1995000
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};
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/*
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* BUCK8
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* 0.8V to 1.40V (step 10mV)
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*/
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static const struct regulator_linear_range bd71837_buck8_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(800000, 0x00, 0x3C, 10000),
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REGULATOR_LINEAR_RANGE(1400000, 0x3D, 0x3F, 0),
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};
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/*
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* LDO1
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* 3.0 to 3.3V (100mV step)
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*/
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static const struct regulator_linear_range bd71837_ldo1_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
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};
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/*
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* LDO2
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* 0.8 or 0.9V
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*/
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static const unsigned int ldo_2_volts[] = {
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900000, 800000
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};
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/*
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* LDO3
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* 1.8 to 3.3V (100mV step)
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*/
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static const struct regulator_linear_range bd71837_ldo3_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
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};
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/*
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* LDO4
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* 0.9 to 1.8V (100mV step)
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*/
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static const struct regulator_linear_range bd71837_ldo4_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
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REGULATOR_LINEAR_RANGE(1800000, 0x0A, 0x0F, 0),
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};
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/*
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* LDO5
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* 1.8 to 3.3V (100mV step)
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*/
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static const struct regulator_linear_range bd71837_ldo5_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
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};
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/*
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* LDO6
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* 0.9 to 1.8V (100mV step)
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*/
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static const struct regulator_linear_range bd71837_ldo6_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
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REGULATOR_LINEAR_RANGE(1800000, 0x0A, 0x0F, 0),
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};
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/*
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* LDO7
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* 1.8 to 3.3V (100mV step)
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*/
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static const struct regulator_linear_range bd71837_ldo7_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
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};
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static const struct regulator_desc bd71837_regulators[] = {
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{
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.name = "buck1",
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.of_match = of_match_ptr("BUCK1"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD71837_BUCK1,
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.ops = &bd71837_buck1234_regulator_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = BD71837_BUCK1_VOLTAGE_NUM,
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.linear_ranges = bd71837_buck1234_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
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.vsel_reg = BD71837_REG_BUCK1_VOLT_RUN,
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.vsel_mask = BUCK1_RUN_MASK,
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.enable_reg = BD71837_REG_BUCK1_CTRL,
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.enable_mask = BD71837_BUCK_EN,
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.owner = THIS_MODULE,
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},
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{
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.name = "buck2",
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.of_match = of_match_ptr("BUCK2"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD71837_BUCK2,
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.ops = &bd71837_buck1234_regulator_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = BD71837_BUCK2_VOLTAGE_NUM,
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.linear_ranges = bd71837_buck1234_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
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.vsel_reg = BD71837_REG_BUCK2_VOLT_RUN,
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.vsel_mask = BUCK2_RUN_MASK,
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.enable_reg = BD71837_REG_BUCK2_CTRL,
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.enable_mask = BD71837_BUCK_EN,
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.owner = THIS_MODULE,
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},
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{
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.name = "buck3",
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.of_match = of_match_ptr("BUCK3"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD71837_BUCK3,
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.ops = &bd71837_buck1234_regulator_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = BD71837_BUCK3_VOLTAGE_NUM,
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.linear_ranges = bd71837_buck1234_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
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.vsel_reg = BD71837_REG_BUCK3_VOLT_RUN,
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.vsel_mask = BUCK3_RUN_MASK,
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.enable_reg = BD71837_REG_BUCK3_CTRL,
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.enable_mask = BD71837_BUCK_EN,
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.owner = THIS_MODULE,
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},
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{
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.name = "buck4",
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.of_match = of_match_ptr("BUCK4"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD71837_BUCK4,
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.ops = &bd71837_buck1234_regulator_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = BD71837_BUCK4_VOLTAGE_NUM,
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.linear_ranges = bd71837_buck1234_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
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.vsel_reg = BD71837_REG_BUCK4_VOLT_RUN,
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.vsel_mask = BUCK4_RUN_MASK,
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.enable_reg = BD71837_REG_BUCK4_CTRL,
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.enable_mask = BD71837_BUCK_EN,
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.owner = THIS_MODULE,
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},
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{
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.name = "buck5",
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.of_match = of_match_ptr("BUCK5"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD71837_BUCK5,
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.ops = &bd71837_buck_regulator_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = BD71837_BUCK5_VOLTAGE_NUM,
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.linear_ranges = bd71837_buck5_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(bd71837_buck5_voltage_ranges),
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.vsel_reg = BD71837_REG_BUCK5_VOLT,
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.vsel_mask = BUCK5_MASK,
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.enable_reg = BD71837_REG_BUCK5_CTRL,
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.enable_mask = BD71837_BUCK_EN,
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.owner = THIS_MODULE,
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},
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{
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.name = "buck6",
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.of_match = of_match_ptr("BUCK6"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD71837_BUCK6,
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.ops = &bd71837_buck_regulator_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = BD71837_BUCK6_VOLTAGE_NUM,
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.linear_ranges = bd71837_buck6_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(bd71837_buck6_voltage_ranges),
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.vsel_reg = BD71837_REG_BUCK6_VOLT,
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.vsel_mask = BUCK6_MASK,
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.enable_reg = BD71837_REG_BUCK6_CTRL,
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.enable_mask = BD71837_BUCK_EN,
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.owner = THIS_MODULE,
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},
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{
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.name = "buck7",
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.of_match = of_match_ptr("BUCK7"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD71837_BUCK7,
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.ops = &bd71837_buck_regulator_nolinear_ops,
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.type = REGULATOR_VOLTAGE,
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.volt_table = &buck_7_volts[0],
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.n_voltages = ARRAY_SIZE(buck_7_volts),
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.vsel_reg = BD71837_REG_BUCK7_VOLT,
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.vsel_mask = BUCK7_MASK,
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.enable_reg = BD71837_REG_BUCK7_CTRL,
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.enable_mask = BD71837_BUCK_EN,
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.owner = THIS_MODULE,
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},
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{
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.name = "buck8",
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.of_match = of_match_ptr("BUCK8"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD71837_BUCK8,
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.ops = &bd71837_buck_regulator_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = BD71837_BUCK8_VOLTAGE_NUM,
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.linear_ranges = bd71837_buck8_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(bd71837_buck8_voltage_ranges),
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.vsel_reg = BD71837_REG_BUCK8_VOLT,
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.vsel_mask = BUCK8_MASK,
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.enable_reg = BD71837_REG_BUCK8_CTRL,
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.enable_mask = BD71837_BUCK_EN,
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.owner = THIS_MODULE,
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},
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{
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.name = "ldo1",
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.of_match = of_match_ptr("LDO1"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD71837_LDO1,
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.ops = &bd71837_ldo_regulator_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = BD71837_LDO1_VOLTAGE_NUM,
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.linear_ranges = bd71837_ldo1_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(bd71837_ldo1_voltage_ranges),
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.vsel_reg = BD71837_REG_LDO1_VOLT,
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.vsel_mask = LDO1_MASK,
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.enable_reg = BD71837_REG_LDO1_VOLT,
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.enable_mask = BD71837_LDO_EN,
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.owner = THIS_MODULE,
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},
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{
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.name = "ldo2",
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.of_match = of_match_ptr("LDO2"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD71837_LDO2,
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.ops = &bd71837_ldo_regulator_nolinear_ops,
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.type = REGULATOR_VOLTAGE,
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.volt_table = &ldo_2_volts[0],
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.vsel_reg = BD71837_REG_LDO2_VOLT,
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.vsel_mask = LDO2_MASK,
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.n_voltages = ARRAY_SIZE(ldo_2_volts),
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.n_voltages = BD71837_LDO2_VOLTAGE_NUM,
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.enable_reg = BD71837_REG_LDO2_VOLT,
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.enable_mask = BD71837_LDO_EN,
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.owner = THIS_MODULE,
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},
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{
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.name = "ldo3",
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.of_match = of_match_ptr("LDO3"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD71837_LDO3,
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.ops = &bd71837_ldo_regulator_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = BD71837_LDO3_VOLTAGE_NUM,
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.linear_ranges = bd71837_ldo3_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(bd71837_ldo3_voltage_ranges),
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.vsel_reg = BD71837_REG_LDO3_VOLT,
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.vsel_mask = LDO3_MASK,
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.enable_reg = BD71837_REG_LDO3_VOLT,
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.enable_mask = BD71837_LDO_EN,
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.owner = THIS_MODULE,
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},
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{
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.name = "ldo4",
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.of_match = of_match_ptr("LDO4"),
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.regulators_node = of_match_ptr("regulators"),
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.id = BD71837_LDO4,
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.ops = &bd71837_ldo_regulator_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = BD71837_LDO4_VOLTAGE_NUM,
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.linear_ranges = bd71837_ldo4_voltage_ranges,
|
|
.n_linear_ranges = ARRAY_SIZE(bd71837_ldo4_voltage_ranges),
|
|
.vsel_reg = BD71837_REG_LDO4_VOLT,
|
|
.vsel_mask = LDO4_MASK,
|
|
.enable_reg = BD71837_REG_LDO4_VOLT,
|
|
.enable_mask = BD71837_LDO_EN,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
{
|
|
.name = "ldo5",
|
|
.of_match = of_match_ptr("LDO5"),
|
|
.regulators_node = of_match_ptr("regulators"),
|
|
.id = BD71837_LDO5,
|
|
.ops = &bd71837_ldo_regulator_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.n_voltages = BD71837_LDO5_VOLTAGE_NUM,
|
|
.linear_ranges = bd71837_ldo5_voltage_ranges,
|
|
.n_linear_ranges = ARRAY_SIZE(bd71837_ldo5_voltage_ranges),
|
|
/* LDO5 is supplied by buck6 */
|
|
.supply_name = "buck6",
|
|
.vsel_reg = BD71837_REG_LDO5_VOLT,
|
|
.vsel_mask = LDO5_MASK,
|
|
.enable_reg = BD71837_REG_LDO5_VOLT,
|
|
.enable_mask = BD71837_LDO_EN,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
{
|
|
.name = "ldo6",
|
|
.of_match = of_match_ptr("LDO6"),
|
|
.regulators_node = of_match_ptr("regulators"),
|
|
.id = BD71837_LDO6,
|
|
.ops = &bd71837_ldo_regulator_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.n_voltages = BD71837_LDO6_VOLTAGE_NUM,
|
|
.linear_ranges = bd71837_ldo6_voltage_ranges,
|
|
.n_linear_ranges = ARRAY_SIZE(bd71837_ldo6_voltage_ranges),
|
|
/* LDO6 is supplied by buck7 */
|
|
.supply_name = "buck7",
|
|
.vsel_reg = BD71837_REG_LDO6_VOLT,
|
|
.vsel_mask = LDO6_MASK,
|
|
.enable_reg = BD71837_REG_LDO6_VOLT,
|
|
.enable_mask = BD71837_LDO_EN,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
{
|
|
.name = "ldo7",
|
|
.of_match = of_match_ptr("LDO7"),
|
|
.regulators_node = of_match_ptr("regulators"),
|
|
.id = BD71837_LDO7,
|
|
.ops = &bd71837_ldo_regulator_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.n_voltages = BD71837_LDO7_VOLTAGE_NUM,
|
|
.linear_ranges = bd71837_ldo7_voltage_ranges,
|
|
.n_linear_ranges = ARRAY_SIZE(bd71837_ldo7_voltage_ranges),
|
|
.vsel_reg = BD71837_REG_LDO7_VOLT,
|
|
.vsel_mask = LDO7_MASK,
|
|
.enable_reg = BD71837_REG_LDO7_VOLT,
|
|
.enable_mask = BD71837_LDO_EN,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
struct reg_init {
|
|
unsigned int reg;
|
|
unsigned int mask;
|
|
};
|
|
|
|
static int bd71837_probe(struct platform_device *pdev)
|
|
{
|
|
struct bd71837_pmic *pmic;
|
|
struct regulator_config config = { 0 };
|
|
struct reg_init pmic_regulator_inits[] = {
|
|
{
|
|
.reg = BD71837_REG_BUCK1_CTRL,
|
|
.mask = BD71837_BUCK_SEL,
|
|
}, {
|
|
.reg = BD71837_REG_BUCK2_CTRL,
|
|
.mask = BD71837_BUCK_SEL,
|
|
}, {
|
|
.reg = BD71837_REG_BUCK3_CTRL,
|
|
.mask = BD71837_BUCK_SEL,
|
|
}, {
|
|
.reg = BD71837_REG_BUCK4_CTRL,
|
|
.mask = BD71837_BUCK_SEL,
|
|
}, {
|
|
.reg = BD71837_REG_BUCK5_CTRL,
|
|
.mask = BD71837_BUCK_SEL,
|
|
}, {
|
|
.reg = BD71837_REG_BUCK6_CTRL,
|
|
.mask = BD71837_BUCK_SEL,
|
|
}, {
|
|
.reg = BD71837_REG_BUCK7_CTRL,
|
|
.mask = BD71837_BUCK_SEL,
|
|
}, {
|
|
.reg = BD71837_REG_BUCK8_CTRL,
|
|
.mask = BD71837_BUCK_SEL,
|
|
}, {
|
|
.reg = BD71837_REG_LDO1_VOLT,
|
|
.mask = BD71837_LDO_SEL,
|
|
}, {
|
|
.reg = BD71837_REG_LDO2_VOLT,
|
|
.mask = BD71837_LDO_SEL,
|
|
}, {
|
|
.reg = BD71837_REG_LDO3_VOLT,
|
|
.mask = BD71837_LDO_SEL,
|
|
}, {
|
|
.reg = BD71837_REG_LDO4_VOLT,
|
|
.mask = BD71837_LDO_SEL,
|
|
}, {
|
|
.reg = BD71837_REG_LDO5_VOLT,
|
|
.mask = BD71837_LDO_SEL,
|
|
}, {
|
|
.reg = BD71837_REG_LDO6_VOLT,
|
|
.mask = BD71837_LDO_SEL,
|
|
}, {
|
|
.reg = BD71837_REG_LDO7_VOLT,
|
|
.mask = BD71837_LDO_SEL,
|
|
}
|
|
};
|
|
|
|
int i, err;
|
|
|
|
pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
|
|
if (!pmic)
|
|
return -ENOMEM;
|
|
|
|
memcpy(pmic->descs, bd71837_regulators, sizeof(pmic->descs));
|
|
|
|
pmic->pdev = pdev;
|
|
pmic->mfd = dev_get_drvdata(pdev->dev.parent);
|
|
|
|
if (!pmic->mfd) {
|
|
dev_err(&pdev->dev, "No MFD driver data\n");
|
|
err = -EINVAL;
|
|
goto err;
|
|
}
|
|
platform_set_drvdata(pdev, pmic);
|
|
|
|
/* Register LOCK release */
|
|
err = regmap_update_bits(pmic->mfd->regmap, BD71837_REG_REGLOCK,
|
|
(REGLOCK_PWRSEQ | REGLOCK_VREG), 0);
|
|
if (err) {
|
|
dev_err(&pmic->pdev->dev, "Failed to unlock PMIC (%d)\n", err);
|
|
goto err;
|
|
} else {
|
|
dev_dbg(&pmic->pdev->dev, "Unlocked lock register 0x%x\n",
|
|
BD71837_REG_REGLOCK);
|
|
}
|
|
|
|
/*
|
|
* There is a HW quirk in BD71837. The shutdown sequence timings for
|
|
* bucks/LDOs which are controlled via register interface are changed.
|
|
* At PMIC poweroff the voltage for BUCK6/7 is cut immediately at the
|
|
* beginning of shut-down sequence. As bucks 6 and 7 are parent
|
|
* supplies for LDO5 and LDO6 - this causes LDO5/6 voltage
|
|
* monitoring to errorneously detect under voltage and force PMIC to
|
|
* emergency state instead of poweroff. In order to avoid this we
|
|
* disable voltage monitoring for LDO5 and LDO6
|
|
*/
|
|
err = regmap_update_bits(pmic->mfd->regmap, BD718XX_REG_MVRFLTMASK2,
|
|
BD718XX_LDO5_VRMON80 | BD718XX_LDO6_VRMON80,
|
|
BD718XX_LDO5_VRMON80 | BD718XX_LDO6_VRMON80);
|
|
if (err) {
|
|
dev_err(&pmic->pdev->dev,
|
|
"Failed to disable voltage monitoring\n");
|
|
goto err;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(pmic_regulator_inits); i++) {
|
|
|
|
struct regulator_desc *desc;
|
|
struct regulator_dev *rdev;
|
|
|
|
desc = &pmic->descs[i];
|
|
|
|
config.dev = pdev->dev.parent;
|
|
config.driver_data = pmic;
|
|
config.regmap = pmic->mfd->regmap;
|
|
|
|
rdev = devm_regulator_register(&pdev->dev, desc, &config);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(pmic->mfd->dev,
|
|
"failed to register %s regulator\n",
|
|
desc->name);
|
|
err = PTR_ERR(rdev);
|
|
goto err;
|
|
}
|
|
/* Regulator register gets the regulator constraints and
|
|
* applies them (set_machine_constraints). This should have
|
|
* turned the control register(s) to correct values and we
|
|
* can now switch the control from PMIC state machine to the
|
|
* register interface
|
|
*/
|
|
err = regmap_update_bits(pmic->mfd->regmap,
|
|
pmic_regulator_inits[i].reg,
|
|
pmic_regulator_inits[i].mask,
|
|
0xFFFFFFFF);
|
|
if (err) {
|
|
dev_err(&pmic->pdev->dev,
|
|
"Failed to write BUCK/LDO SEL bit for (%s)\n",
|
|
desc->name);
|
|
goto err;
|
|
}
|
|
|
|
pmic->rdev[i] = rdev;
|
|
}
|
|
|
|
err:
|
|
return err;
|
|
}
|
|
|
|
static struct platform_driver bd71837_regulator = {
|
|
.driver = {
|
|
.name = "bd71837-pmic",
|
|
},
|
|
.probe = bd71837_probe,
|
|
};
|
|
|
|
module_platform_driver(bd71837_regulator);
|
|
|
|
MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
|
|
MODULE_DESCRIPTION("BD71837 voltage regulator driver");
|
|
MODULE_LICENSE("GPL");
|