forked from Minki/linux
ecea7484d2
The struct of_regulator_match is declared as a non-static local variable so the structure members are not auto-initialized. Initialize the struct at declaration time to avoid the structure members values to be indeterminate and have sane defaults instead. Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk> Signed-off-by: Mark Brown <broonie@kernel.org>
587 lines
17 KiB
C
587 lines
17 KiB
C
/*
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* max77802.c - Regulator driver for the Maxim 77802
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*
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* Copyright (C) 2013-2014 Google, Inc
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* Simon Glass <sjg@chromium.org>
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*
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* Copyright (C) 2012 Samsung Electronics
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* Chiwoong Byun <woong.byun@smasung.com>
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* Jonghwa Lee <jonghwa3.lee@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* This driver is based on max8997.c
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*/
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#include <linux/kernel.h>
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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/gpio/consumer.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/max77686.h>
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#include <linux/mfd/max77686-private.h>
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/* Default ramp delay in case it is not manually set */
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#define MAX77802_RAMP_DELAY 100000 /* uV/us */
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#define MAX77802_OPMODE_SHIFT_LDO 6
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#define MAX77802_OPMODE_BUCK234_SHIFT 4
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#define MAX77802_OPMODE_MASK 0x3
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#define MAX77802_VSEL_MASK 0x3F
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#define MAX77802_DVS_VSEL_MASK 0xFF
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#define MAX77802_RAMP_RATE_MASK_2BIT 0xC0
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#define MAX77802_RAMP_RATE_SHIFT_2BIT 6
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#define MAX77802_RAMP_RATE_MASK_4BIT 0xF0
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#define MAX77802_RAMP_RATE_SHIFT_4BIT 4
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/* MAX77802 has two register formats: 2-bit and 4-bit */
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static const unsigned int ramp_table_77802_2bit[] = {
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12500,
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25000,
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50000,
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100000,
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};
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static unsigned int ramp_table_77802_4bit[] = {
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1000, 2000, 3030, 4000,
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5000, 5880, 7140, 8330,
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9090, 10000, 11110, 12500,
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16670, 25000, 50000, 100000,
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};
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struct max77802_regulator_prv {
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unsigned int opmode[MAX77802_REG_MAX];
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};
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static int max77802_get_opmode_shift(int id)
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{
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if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 &&
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id <= MAX77802_BUCK10))
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return 0;
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if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4)
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return MAX77802_OPMODE_BUCK234_SHIFT;
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if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35)
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return MAX77802_OPMODE_SHIFT_LDO;
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return -EINVAL;
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}
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/*
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* Some BUCKS supports Normal[ON/OFF] mode during suspend
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*
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* BUCK 1, 6, 2-4, 5, 7-10 (all)
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*
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* The other mode (0x02) will make PWRREQ switch between normal
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* and low power.
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*/
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static int max77802_buck_set_suspend_disable(struct regulator_dev *rdev)
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{
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unsigned int val = MAX77802_OPMODE_STANDBY;
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struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
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int id = rdev_get_id(rdev);
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int shift = max77802_get_opmode_shift(id);
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max77802->opmode[id] = val;
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return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
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rdev->desc->enable_mask, val << shift);
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}
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/*
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* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state
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* (Enable Control Logic1 by PWRREQ)
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*
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* LDOs 2, 4-19, 22-35.
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*
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*/
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static int max77802_ldo_set_suspend_mode_logic1(struct regulator_dev *rdev,
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unsigned int mode)
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{
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struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
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int id = rdev_get_id(rdev);
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unsigned int val;
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int shift = max77802_get_opmode_shift(id);
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switch (mode) {
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case REGULATOR_MODE_IDLE: /* ON in LP Mode */
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val = MAX77802_OPMODE_LP;
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break;
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case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
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val = MAX77802_OPMODE_NORMAL;
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break;
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case REGULATOR_MODE_STANDBY: /* ON/OFF by PWRREQ */
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val = MAX77802_OPMODE_STANDBY;
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break;
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default:
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dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
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rdev->desc->name, mode);
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return -EINVAL;
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}
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max77802->opmode[id] = val;
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return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
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rdev->desc->enable_mask, val << shift);
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}
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/*
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* Mode 1 (Output[ON/OFF] by PWRREQ) is not supported on some LDOs
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* (Enable Control Logic2 by PWRREQ)
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*
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* LDOs 1, 20, 21, and 3,
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*
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*/
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static int max77802_ldo_set_suspend_mode_logic2(struct regulator_dev *rdev,
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unsigned int mode)
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{
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struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
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int id = rdev_get_id(rdev);
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unsigned int val;
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int shift = max77802_get_opmode_shift(id);
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switch (mode) {
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case REGULATOR_MODE_IDLE: /* ON in LP Mode */
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val = MAX77802_OPMODE_LP;
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break;
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case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
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val = MAX77802_OPMODE_NORMAL;
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break;
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default:
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dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
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rdev->desc->name, mode);
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return -EINVAL;
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}
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max77802->opmode[id] = val;
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return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
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rdev->desc->enable_mask, val << shift);
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}
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static int max77802_enable(struct regulator_dev *rdev)
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{
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struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
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int id = rdev_get_id(rdev);
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int shift = max77802_get_opmode_shift(id);
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return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
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rdev->desc->enable_mask,
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max77802->opmode[id] << shift);
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}
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static int max77802_find_ramp_value(struct regulator_dev *rdev,
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const unsigned int limits[], int size,
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unsigned int ramp_delay)
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{
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int i;
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for (i = 0; i < size; i++) {
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if (ramp_delay <= limits[i])
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return i;
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}
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/* Use maximum value for no ramp control */
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dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n",
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rdev->desc->name, ramp_delay);
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return size - 1;
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}
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/* Used for BUCKs 2-4 */
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static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev,
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int ramp_delay)
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{
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int id = rdev_get_id(rdev);
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unsigned int ramp_value;
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if (id > MAX77802_BUCK4) {
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dev_warn(&rdev->dev,
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"%s: regulator: ramp delay not supported\n",
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rdev->desc->name);
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return -EINVAL;
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}
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ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit,
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ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay);
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return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
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MAX77802_RAMP_RATE_MASK_2BIT,
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ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT);
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}
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/* For BUCK1, 6 */
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static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev,
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int ramp_delay)
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{
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unsigned int ramp_value;
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ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit,
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ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay);
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return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
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MAX77802_RAMP_RATE_MASK_4BIT,
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ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT);
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}
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/*
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* LDOs 2, 4-19, 22-35
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*/
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static struct regulator_ops max77802_ldo_ops_logic1 = {
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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 = max77802_enable,
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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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.set_suspend_mode = max77802_ldo_set_suspend_mode_logic1,
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};
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/*
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* LDOs 1, 20, 21, 3
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*/
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static struct regulator_ops max77802_ldo_ops_logic2 = {
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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 = max77802_enable,
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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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.set_suspend_mode = max77802_ldo_set_suspend_mode_logic2,
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};
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/* BUCKS 1, 6 */
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static struct regulator_ops max77802_buck_16_dvs_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 = max77802_enable,
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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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.set_ramp_delay = max77802_set_ramp_delay_4bit,
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.set_suspend_disable = max77802_buck_set_suspend_disable,
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};
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/* BUCKs 2-4, 5, 7-10 */
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static struct regulator_ops max77802_buck_dvs_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 = max77802_enable,
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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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.set_ramp_delay = max77802_set_ramp_delay_2bit,
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.set_suspend_disable = max77802_buck_set_suspend_disable,
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};
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/* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */
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#define regulator_77802_desc_p_ldo(num, supply, log) { \
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.name = "LDO"#num, \
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.id = MAX77802_LDO##num, \
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.supply_name = "inl"#supply, \
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.ops = &max77802_ldo_ops_logic##log, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = 800000, \
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.uV_step = 50000, \
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.ramp_delay = MAX77802_RAMP_DELAY, \
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.n_voltages = 1 << 6, \
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.vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
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.vsel_mask = MAX77802_VSEL_MASK, \
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.enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
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.enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
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}
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/* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */
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#define regulator_77802_desc_n_ldo(num, supply, log) { \
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.name = "LDO"#num, \
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.id = MAX77802_LDO##num, \
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.supply_name = "inl"#supply, \
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.ops = &max77802_ldo_ops_logic##log, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = 800000, \
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.uV_step = 25000, \
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.ramp_delay = MAX77802_RAMP_DELAY, \
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.n_voltages = 1 << 6, \
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.vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
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.vsel_mask = MAX77802_VSEL_MASK, \
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.enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
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.enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
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}
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/* BUCKs 1, 6 */
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#define regulator_77802_desc_16_buck(num) { \
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.name = "BUCK"#num, \
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.id = MAX77802_BUCK##num, \
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.supply_name = "inb"#num, \
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.ops = &max77802_buck_16_dvs_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = 612500, \
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.uV_step = 6250, \
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.ramp_delay = MAX77802_RAMP_DELAY, \
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.n_voltages = 1 << 8, \
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.vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
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.vsel_mask = MAX77802_DVS_VSEL_MASK, \
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.enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \
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.enable_mask = MAX77802_OPMODE_MASK, \
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}
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/* BUCKS 2-4 */
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#define regulator_77802_desc_234_buck(num) { \
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.name = "BUCK"#num, \
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.id = MAX77802_BUCK##num, \
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.supply_name = "inb"#num, \
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.ops = &max77802_buck_dvs_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = 600000, \
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.uV_step = 6250, \
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.ramp_delay = MAX77802_RAMP_DELAY, \
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.n_voltages = 0x91, \
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.vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
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.vsel_mask = MAX77802_DVS_VSEL_MASK, \
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.enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \
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.enable_mask = MAX77802_OPMODE_MASK << \
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MAX77802_OPMODE_BUCK234_SHIFT, \
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}
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/* BUCK 5 */
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#define regulator_77802_desc_buck5(num) { \
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.name = "BUCK"#num, \
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.id = MAX77802_BUCK##num, \
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.supply_name = "inb"#num, \
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.ops = &max77802_buck_dvs_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = 750000, \
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.uV_step = 50000, \
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.ramp_delay = MAX77802_RAMP_DELAY, \
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.n_voltages = 1 << 6, \
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.vsel_reg = MAX77802_REG_BUCK5OUT, \
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.vsel_mask = MAX77802_VSEL_MASK, \
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.enable_reg = MAX77802_REG_BUCK5CTRL, \
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.enable_mask = MAX77802_OPMODE_MASK, \
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}
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/* BUCKs 7-10 */
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#define regulator_77802_desc_buck7_10(num) { \
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.name = "BUCK"#num, \
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.id = MAX77802_BUCK##num, \
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.supply_name = "inb"#num, \
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.ops = &max77802_buck_dvs_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = 750000, \
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.uV_step = 50000, \
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.ramp_delay = MAX77802_RAMP_DELAY, \
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.n_voltages = 1 << 6, \
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.vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \
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.vsel_mask = MAX77802_VSEL_MASK, \
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.enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \
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.enable_mask = MAX77802_OPMODE_MASK, \
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}
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static struct regulator_desc regulators[] = {
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regulator_77802_desc_16_buck(1),
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regulator_77802_desc_234_buck(2),
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regulator_77802_desc_234_buck(3),
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regulator_77802_desc_234_buck(4),
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regulator_77802_desc_buck5(5),
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regulator_77802_desc_16_buck(6),
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regulator_77802_desc_buck7_10(7),
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regulator_77802_desc_buck7_10(8),
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regulator_77802_desc_buck7_10(9),
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regulator_77802_desc_buck7_10(10),
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regulator_77802_desc_n_ldo(1, 10, 2),
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regulator_77802_desc_n_ldo(2, 10, 1),
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regulator_77802_desc_p_ldo(3, 3, 2),
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regulator_77802_desc_p_ldo(4, 6, 1),
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regulator_77802_desc_p_ldo(5, 3, 1),
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regulator_77802_desc_p_ldo(6, 3, 1),
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regulator_77802_desc_p_ldo(7, 3, 1),
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regulator_77802_desc_n_ldo(8, 1, 1),
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regulator_77802_desc_p_ldo(9, 5, 1),
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regulator_77802_desc_p_ldo(10, 4, 1),
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regulator_77802_desc_p_ldo(11, 4, 1),
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regulator_77802_desc_p_ldo(12, 9, 1),
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regulator_77802_desc_p_ldo(13, 4, 1),
|
|
regulator_77802_desc_p_ldo(14, 4, 1),
|
|
regulator_77802_desc_n_ldo(15, 1, 1),
|
|
regulator_77802_desc_n_ldo(17, 2, 1),
|
|
regulator_77802_desc_p_ldo(18, 7, 1),
|
|
regulator_77802_desc_p_ldo(19, 5, 1),
|
|
regulator_77802_desc_p_ldo(20, 7, 2),
|
|
regulator_77802_desc_p_ldo(21, 6, 2),
|
|
regulator_77802_desc_p_ldo(23, 9, 1),
|
|
regulator_77802_desc_p_ldo(24, 6, 1),
|
|
regulator_77802_desc_p_ldo(25, 9, 1),
|
|
regulator_77802_desc_p_ldo(26, 9, 1),
|
|
regulator_77802_desc_n_ldo(27, 2, 1),
|
|
regulator_77802_desc_p_ldo(28, 7, 1),
|
|
regulator_77802_desc_p_ldo(29, 7, 1),
|
|
regulator_77802_desc_n_ldo(30, 2, 1),
|
|
regulator_77802_desc_p_ldo(32, 9, 1),
|
|
regulator_77802_desc_p_ldo(33, 6, 1),
|
|
regulator_77802_desc_p_ldo(34, 9, 1),
|
|
regulator_77802_desc_n_ldo(35, 2, 1),
|
|
};
|
|
|
|
#ifdef CONFIG_OF
|
|
static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev,
|
|
struct max77686_platform_data *pdata)
|
|
{
|
|
struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
|
|
struct device_node *pmic_np, *regulators_np;
|
|
struct max77686_regulator_data *rdata;
|
|
struct of_regulator_match rmatch = { };
|
|
unsigned int i;
|
|
|
|
pmic_np = iodev->dev->of_node;
|
|
regulators_np = of_get_child_by_name(pmic_np, "regulators");
|
|
if (!regulators_np) {
|
|
dev_err(&pdev->dev, "could not find regulators sub-node\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
pdata->num_regulators = ARRAY_SIZE(regulators);
|
|
rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
|
|
pdata->num_regulators, GFP_KERNEL);
|
|
if (!rdata) {
|
|
of_node_put(regulators_np);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
for (i = 0; i < pdata->num_regulators; i++) {
|
|
rmatch.name = regulators[i].name;
|
|
rmatch.init_data = NULL;
|
|
rmatch.of_node = NULL;
|
|
if (of_regulator_match(&pdev->dev, regulators_np, &rmatch,
|
|
1) != 1) {
|
|
dev_warn(&pdev->dev, "No matching regulator for '%s'\n",
|
|
rmatch.name);
|
|
continue;
|
|
}
|
|
rdata[i].initdata = rmatch.init_data;
|
|
rdata[i].of_node = rmatch.of_node;
|
|
rdata[i].id = regulators[i].id;
|
|
}
|
|
|
|
pdata->regulators = rdata;
|
|
of_node_put(regulators_np);
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev,
|
|
struct max77686_platform_data *pdata)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_OF */
|
|
|
|
static int max77802_pmic_probe(struct platform_device *pdev)
|
|
{
|
|
struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
|
|
struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev);
|
|
struct max77802_regulator_prv *max77802;
|
|
int i, ret = 0, val;
|
|
struct regulator_config config = { };
|
|
|
|
/* This is allocated by the MFD driver */
|
|
if (!pdata) {
|
|
dev_err(&pdev->dev, "no platform data found for regulator\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
max77802 = devm_kzalloc(&pdev->dev,
|
|
sizeof(struct max77802_regulator_prv),
|
|
GFP_KERNEL);
|
|
if (!max77802)
|
|
return -ENOMEM;
|
|
|
|
if (iodev->dev->of_node) {
|
|
ret = max77802_pmic_dt_parse_pdata(pdev, pdata);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
config.dev = iodev->dev;
|
|
config.regmap = iodev->regmap;
|
|
config.driver_data = max77802;
|
|
platform_set_drvdata(pdev, max77802);
|
|
|
|
for (i = 0; i < MAX77802_REG_MAX; i++) {
|
|
struct regulator_dev *rdev;
|
|
int id = pdata->regulators[i].id;
|
|
int shift = max77802_get_opmode_shift(id);
|
|
|
|
config.init_data = pdata->regulators[i].initdata;
|
|
config.of_node = pdata->regulators[i].of_node;
|
|
|
|
ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val);
|
|
val = val >> shift & MAX77802_OPMODE_MASK;
|
|
|
|
/*
|
|
* If the regulator is disabled and the system warm rebooted,
|
|
* the hardware reports OFF as the regulator operating mode.
|
|
* Default to operating mode NORMAL in that case.
|
|
*/
|
|
if (val == MAX77802_OPMODE_OFF)
|
|
max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
|
|
else
|
|
max77802->opmode[id] = val;
|
|
|
|
rdev = devm_regulator_register(&pdev->dev,
|
|
®ulators[i], &config);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(&pdev->dev,
|
|
"regulator init failed for %d\n", i);
|
|
return PTR_ERR(rdev);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id max77802_pmic_id[] = {
|
|
{"max77802-pmic", 0},
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, max77802_pmic_id);
|
|
|
|
static struct platform_driver max77802_pmic_driver = {
|
|
.driver = {
|
|
.name = "max77802-pmic",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = max77802_pmic_probe,
|
|
.id_table = max77802_pmic_id,
|
|
};
|
|
|
|
module_platform_driver(max77802_pmic_driver);
|
|
|
|
MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver");
|
|
MODULE_AUTHOR("Simon Glass <sjg@chromium.org>");
|
|
MODULE_LICENSE("GPL");
|