linux/drivers/regulator/arizona-ldo1.c
Linus Torvalds e6b5be2be4 Driver core patches for 3.19-rc1
Here's the set of driver core patches for 3.19-rc1.
 
 They are dominated by the removal of the .owner field in platform
 drivers.  They touch a lot of files, but they are "simple" changes, just
 removing a line in a structure.
 
 Other than that, a few minor driver core and debugfs changes.  There are
 some ath9k patches coming in through this tree that have been acked by
 the wireless maintainers as they relied on the debugfs changes.
 
 Everything has been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core update from Greg KH:
 "Here's the set of driver core patches for 3.19-rc1.

  They are dominated by the removal of the .owner field in platform
  drivers.  They touch a lot of files, but they are "simple" changes,
  just removing a line in a structure.

  Other than that, a few minor driver core and debugfs changes.  There
  are some ath9k patches coming in through this tree that have been
  acked by the wireless maintainers as they relied on the debugfs
  changes.

  Everything has been in linux-next for a while"

* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
  Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
  fs: debugfs: add forward declaration for struct device type
  firmware class: Deletion of an unnecessary check before the function call "vunmap"
  firmware loader: fix hung task warning dump
  devcoredump: provide a one-way disable function
  device: Add dev_<level>_once variants
  ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
  ath: use seq_file api for ath9k debugfs files
  debugfs: add helper function to create device related seq_file
  drivers/base: cacheinfo: remove noisy error boot message
  Revert "core: platform: add warning if driver has no owner"
  drivers: base: support cpu cache information interface to userspace via sysfs
  drivers: base: add cpu_device_create to support per-cpu devices
  topology: replace custom attribute macros with standard DEVICE_ATTR*
  cpumask: factor out show_cpumap into separate helper function
  driver core: Fix unbalanced device reference in drivers_probe
  driver core: fix race with userland in device_add()
  sysfs/kernfs: make read requests on pre-alloc files use the buffer.
  sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
  fs: sysfs: return EGBIG on write if offset is larger than file size
  ...
2014-12-14 16:10:09 -08:00

313 lines
7.6 KiB
C

/*
* arizona-ldo1.c -- LDO1 supply for Arizona devices
*
* Copyright 2012 Wolfson Microelectronics PLC.
*
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/pdata.h>
#include <linux/mfd/arizona/registers.h>
struct arizona_ldo1 {
struct regulator_dev *regulator;
struct arizona *arizona;
struct regulator_consumer_supply supply;
struct regulator_init_data init_data;
};
static int arizona_ldo1_hc_list_voltage(struct regulator_dev *rdev,
unsigned int selector)
{
if (selector >= rdev->desc->n_voltages)
return -EINVAL;
if (selector == rdev->desc->n_voltages - 1)
return 1800000;
else
return rdev->desc->min_uV + (rdev->desc->uV_step * selector);
}
static int arizona_ldo1_hc_map_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
int sel;
sel = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
if (sel >= rdev->desc->n_voltages)
sel = rdev->desc->n_voltages - 1;
return sel;
}
static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev,
unsigned sel)
{
struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
struct regmap *regmap = ldo->arizona->regmap;
unsigned int val;
int ret;
if (sel == rdev->desc->n_voltages - 1)
val = ARIZONA_LDO1_HI_PWR;
else
val = 0;
ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2,
ARIZONA_LDO1_HI_PWR, val);
if (ret != 0)
return ret;
ret = regmap_update_bits(regmap, ARIZONA_DYNAMIC_FREQUENCY_SCALING_1,
ARIZONA_SUBSYS_MAX_FREQ, val);
if (ret != 0)
return ret;
if (val)
return 0;
val = sel << ARIZONA_LDO1_VSEL_SHIFT;
return regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_1,
ARIZONA_LDO1_VSEL_MASK, val);
}
static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev)
{
struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
struct regmap *regmap = ldo->arizona->regmap;
unsigned int val;
int ret;
ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val);
if (ret != 0)
return ret;
if (val & ARIZONA_LDO1_HI_PWR)
return rdev->desc->n_voltages - 1;
ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_1, &val);
if (ret != 0)
return ret;
return (val & ARIZONA_LDO1_VSEL_MASK) >> ARIZONA_LDO1_VSEL_SHIFT;
}
static struct regulator_ops arizona_ldo1_hc_ops = {
.list_voltage = arizona_ldo1_hc_list_voltage,
.map_voltage = arizona_ldo1_hc_map_voltage,
.get_voltage_sel = arizona_ldo1_hc_get_voltage_sel,
.set_voltage_sel = arizona_ldo1_hc_set_voltage_sel,
.get_bypass = regulator_get_bypass_regmap,
.set_bypass = regulator_set_bypass_regmap,
};
static const struct regulator_desc arizona_ldo1_hc = {
.name = "LDO1",
.supply_name = "LDOVDD",
.type = REGULATOR_VOLTAGE,
.ops = &arizona_ldo1_hc_ops,
.bypass_reg = ARIZONA_LDO1_CONTROL_1,
.bypass_mask = ARIZONA_LDO1_BYPASS,
.min_uV = 900000,
.uV_step = 50000,
.n_voltages = 8,
.enable_time = 1500,
.owner = THIS_MODULE,
};
static struct regulator_ops arizona_ldo1_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
};
static const struct regulator_desc arizona_ldo1 = {
.name = "LDO1",
.supply_name = "LDOVDD",
.type = REGULATOR_VOLTAGE,
.ops = &arizona_ldo1_ops,
.vsel_reg = ARIZONA_LDO1_CONTROL_1,
.vsel_mask = ARIZONA_LDO1_VSEL_MASK,
.min_uV = 900000,
.uV_step = 25000,
.n_voltages = 13,
.enable_time = 500,
.owner = THIS_MODULE,
};
static const struct regulator_init_data arizona_ldo1_dvfs = {
.constraints = {
.min_uV = 1200000,
.max_uV = 1800000,
.valid_ops_mask = REGULATOR_CHANGE_STATUS |
REGULATOR_CHANGE_VOLTAGE,
},
.num_consumer_supplies = 1,
};
static const struct regulator_init_data arizona_ldo1_default = {
.constraints = {
.valid_ops_mask = REGULATOR_CHANGE_STATUS,
},
.num_consumer_supplies = 1,
};
static int arizona_ldo1_of_get_pdata(struct arizona *arizona,
struct regulator_config *config,
const struct regulator_desc *desc)
{
struct arizona_pdata *pdata = &arizona->pdata;
struct arizona_ldo1 *ldo1 = config->driver_data;
struct device_node *init_node, *dcvdd_node;
struct regulator_init_data *init_data;
pdata->ldoena = arizona_of_get_named_gpio(arizona, "wlf,ldoena", true);
init_node = of_get_child_by_name(arizona->dev->of_node, "ldo1");
dcvdd_node = of_parse_phandle(arizona->dev->of_node, "DCVDD-supply", 0);
if (init_node) {
config->of_node = init_node;
init_data = of_get_regulator_init_data(arizona->dev, init_node,
desc);
if (init_data) {
init_data->consumer_supplies = &ldo1->supply;
init_data->num_consumer_supplies = 1;
if (dcvdd_node && dcvdd_node != init_node)
arizona->external_dcvdd = true;
pdata->ldo1 = init_data;
}
} else if (dcvdd_node) {
arizona->external_dcvdd = true;
}
of_node_put(dcvdd_node);
return 0;
}
static int arizona_ldo1_probe(struct platform_device *pdev)
{
struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
const struct regulator_desc *desc;
struct regulator_config config = { };
struct arizona_ldo1 *ldo1;
int ret;
arizona->external_dcvdd = false;
ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
if (!ldo1)
return -ENOMEM;
ldo1->arizona = arizona;
/*
* Since the chip usually supplies itself we provide some
* default init_data for it. This will be overridden with
* platform data if provided.
*/
switch (arizona->type) {
case WM5102:
case WM8997:
desc = &arizona_ldo1_hc;
ldo1->init_data = arizona_ldo1_dvfs;
break;
default:
desc = &arizona_ldo1;
ldo1->init_data = arizona_ldo1_default;
break;
}
ldo1->init_data.consumer_supplies = &ldo1->supply;
ldo1->supply.supply = "DCVDD";
ldo1->supply.dev_name = dev_name(arizona->dev);
config.dev = arizona->dev;
config.driver_data = ldo1;
config.regmap = arizona->regmap;
if (IS_ENABLED(CONFIG_OF)) {
if (!dev_get_platdata(arizona->dev)) {
ret = arizona_ldo1_of_get_pdata(arizona, &config, desc);
if (ret < 0)
return ret;
config.ena_gpio_initialized = true;
}
}
config.ena_gpio = arizona->pdata.ldoena;
if (arizona->pdata.ldo1)
config.init_data = arizona->pdata.ldo1;
else
config.init_data = &ldo1->init_data;
/*
* LDO1 can only be used to supply DCVDD so if it has no
* consumers then DCVDD is supplied externally.
*/
if (config.init_data->num_consumer_supplies == 0)
arizona->external_dcvdd = true;
ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config);
if (IS_ERR(ldo1->regulator)) {
ret = PTR_ERR(ldo1->regulator);
dev_err(arizona->dev, "Failed to register LDO1 supply: %d\n",
ret);
return ret;
}
of_node_put(config.of_node);
platform_set_drvdata(pdev, ldo1);
return 0;
}
static struct platform_driver arizona_ldo1_driver = {
.probe = arizona_ldo1_probe,
.driver = {
.name = "arizona-ldo1",
},
};
module_platform_driver(arizona_ldo1_driver);
/* Module information */
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("Arizona LDO1 driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:arizona-ldo1");