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linux/drivers/regulator/pcap-regulator.c
Mark Brown c172708d38 regulator: core: Use a struct to pass in regulator runtime configuration 
Rather than adding new arguments to regulator_register() every time we
want to add a new bit of dynamic information at runtime change the function
to take these via a struct. By doing this we avoid needing to do further
changes like the recent addition of device tree support which required each
regulator driver to be updated to take an additional parameter.

The regulator_desc which should (mostly) be static data is still passed
separately as most drivers are able to configure this statically at build
time.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-04-09 12:37:09 +01:00

304 lines
7.5 KiB
C
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/*
* PCAP2 Regulator Driver
*
* Copyright (c) 2009 Daniel Ribeiro <drwyrm@gmail.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/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/ezx-pcap.h>
static const u16 V1_table[] = {
2775, 1275, 1600, 1725, 1825, 1925, 2075, 2275,
};
static const u16 V2_table[] = {
2500, 2775,
};
static const u16 V3_table[] = {
1075, 1275, 1550, 1725, 1876, 1950, 2075, 2275,
};
static const u16 V4_table[] = {
1275, 1550, 1725, 1875, 1950, 2075, 2275, 2775,
};
static const u16 V5_table[] = {
1875, 2275, 2475, 2775,
};
static const u16 V6_table[] = {
2475, 2775,
};
static const u16 V7_table[] = {
1875, 2775,
};
#define V8_table V4_table
static const u16 V9_table[] = {
1575, 1875, 2475, 2775,
};
static const u16 V10_table[] = {
5000,
};
static const u16 VAUX1_table[] = {
1875, 2475, 2775, 3000,
};
#define VAUX2_table VAUX1_table
static const u16 VAUX3_table[] = {
1200, 1200, 1200, 1200, 1400, 1600, 1800, 2000,
2200, 2400, 2600, 2800, 3000, 3200, 3400, 3600,
};
static const u16 VAUX4_table[] = {
1800, 1800, 3000, 5000,
};
static const u16 VSIM_table[] = {
1875, 3000,
};
static const u16 VSIM2_table[] = {
1875,
};
static const u16 VVIB_table[] = {
1300, 1800, 2000, 3000,
};
static const u16 SW1_table[] = {
900, 950, 1000, 1050, 1100, 1150, 1200, 1250,
1300, 1350, 1400, 1450, 1500, 1600, 1875, 2250,
};
#define SW2_table SW1_table
static const u16 SW3_table[] = {
4000, 4500, 5000, 5500,
};
struct pcap_regulator {
const u8 reg;
const u8 en;
const u8 index;
const u8 stby;
const u8 lowpwr;
const u8 n_voltages;
const u16 *voltage_table;
};
#define NA 0xff
#define VREG_INFO(_vreg, _reg, _en, _index, _stby, _lowpwr) \
[_vreg] = { \
.reg = _reg, \
.en = _en, \
.index = _index, \
.stby = _stby, \
.lowpwr = _lowpwr, \
.n_voltages = ARRAY_SIZE(_vreg##_table), \
.voltage_table = _vreg##_table, \
}
static struct pcap_regulator vreg_table[] = {
VREG_INFO(V1, PCAP_REG_VREG1, 1, 2, 18, 0),
VREG_INFO(V2, PCAP_REG_VREG1, 5, 6, 19, 22),
VREG_INFO(V3, PCAP_REG_VREG1, 7, 8, 20, 23),
VREG_INFO(V4, PCAP_REG_VREG1, 11, 12, 21, 24),
/* V5 STBY and LOWPWR are on PCAP_REG_VREG2 */
VREG_INFO(V5, PCAP_REG_VREG1, 15, 16, 12, 19),
VREG_INFO(V6, PCAP_REG_VREG2, 1, 2, 14, 20),
VREG_INFO(V7, PCAP_REG_VREG2, 3, 4, 15, 21),
VREG_INFO(V8, PCAP_REG_VREG2, 5, 6, 16, 22),
VREG_INFO(V9, PCAP_REG_VREG2, 9, 10, 17, 23),
VREG_INFO(V10, PCAP_REG_VREG2, 10, NA, 18, 24),
VREG_INFO(VAUX1, PCAP_REG_AUXVREG, 1, 2, 22, 23),
/* VAUX2 ... VSIM2 STBY and LOWPWR are on PCAP_REG_LOWPWR */
VREG_INFO(VAUX2, PCAP_REG_AUXVREG, 4, 5, 0, 1),
VREG_INFO(VAUX3, PCAP_REG_AUXVREG, 7, 8, 2, 3),
VREG_INFO(VAUX4, PCAP_REG_AUXVREG, 12, 13, 4, 5),
VREG_INFO(VSIM, PCAP_REG_AUXVREG, 17, 18, NA, 6),
VREG_INFO(VSIM2, PCAP_REG_AUXVREG, 16, NA, NA, 7),
VREG_INFO(VVIB, PCAP_REG_AUXVREG, 19, 20, NA, NA),
VREG_INFO(SW1, PCAP_REG_SWCTRL, 1, 2, NA, NA),
VREG_INFO(SW2, PCAP_REG_SWCTRL, 6, 7, NA, NA),
/* SW3 STBY is on PCAP_REG_AUXVREG */
VREG_INFO(SW3, PCAP_REG_SWCTRL, 11, 12, 24, NA),
/* SWxS used to control SWx voltage on standby */
/* VREG_INFO(SW1S, PCAP_REG_LOWPWR, NA, 12, NA, NA),
VREG_INFO(SW2S, PCAP_REG_LOWPWR, NA, 20, NA, NA), */
};
static int pcap_regulator_set_voltage_sel(struct regulator_dev *rdev,
unsigned selector)
{
struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
void *pcap = rdev_get_drvdata(rdev);
/* the regulator doesn't support voltage switching */
if (vreg->n_voltages == 1)
return -EINVAL;
return ezx_pcap_set_bits(pcap, vreg->reg,
(vreg->n_voltages - 1) << vreg->index,
selector << vreg->index);
}
static int pcap_regulator_get_voltage_sel(struct regulator_dev *rdev)
{
struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
void *pcap = rdev_get_drvdata(rdev);
u32 tmp;
if (vreg->n_voltages == 1)
return 0;
ezx_pcap_read(pcap, vreg->reg, &tmp);
tmp = ((tmp >> vreg->index) & (vreg->n_voltages - 1));
return tmp;
}
static int pcap_regulator_enable(struct regulator_dev *rdev)
{
struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
void *pcap = rdev_get_drvdata(rdev);
if (vreg->en == NA)
return -EINVAL;
return ezx_pcap_set_bits(pcap, vreg->reg, 1 << vreg->en, 1 << vreg->en);
}
static int pcap_regulator_disable(struct regulator_dev *rdev)
{
struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
void *pcap = rdev_get_drvdata(rdev);
if (vreg->en == NA)
return -EINVAL;
return ezx_pcap_set_bits(pcap, vreg->reg, 1 << vreg->en, 0);
}
static int pcap_regulator_is_enabled(struct regulator_dev *rdev)
{
struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
void *pcap = rdev_get_drvdata(rdev);
u32 tmp;
if (vreg->en == NA)
return -EINVAL;
ezx_pcap_read(pcap, vreg->reg, &tmp);
return (tmp >> vreg->en) & 1;
}
static int pcap_regulator_list_voltage(struct regulator_dev *rdev,
unsigned int index)
{
struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
return vreg->voltage_table[index] * 1000;
}
static struct regulator_ops pcap_regulator_ops = {
.list_voltage = pcap_regulator_list_voltage,
.set_voltage_sel = pcap_regulator_set_voltage_sel,
.get_voltage_sel = pcap_regulator_get_voltage_sel,
.enable = pcap_regulator_enable,
.disable = pcap_regulator_disable,
.is_enabled = pcap_regulator_is_enabled,
};
#define VREG(_vreg) \
[_vreg] = { \
.name = #_vreg, \
.id = _vreg, \
.n_voltages = ARRAY_SIZE(_vreg##_table), \
.ops = &pcap_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}
static const struct regulator_desc pcap_regulators[] = {
VREG(V1), VREG(V2), VREG(V3), VREG(V4), VREG(V5), VREG(V6), VREG(V7),
VREG(V8), VREG(V9), VREG(V10), VREG(VAUX1), VREG(VAUX2), VREG(VAUX3),
VREG(VAUX4), VREG(VSIM), VREG(VSIM2), VREG(VVIB), VREG(SW1), VREG(SW2),
};
static int __devinit pcap_regulator_probe(struct platform_device *pdev)
{
struct regulator_dev *rdev;
void *pcap = dev_get_drvdata(pdev->dev.parent);
struct regulator_config config = { };
config.dev = &pdev->dev;
config.init_data = pdev->dev.platform_data;
config.driver_data = pcap;
rdev = regulator_register(&pcap_regulators[pdev->id], &config);
if (IS_ERR(rdev))
return PTR_ERR(rdev);
platform_set_drvdata(pdev, rdev);
return 0;
}
static int __devexit pcap_regulator_remove(struct platform_device *pdev)
{
struct regulator_dev *rdev = platform_get_drvdata(pdev);
regulator_unregister(rdev);
platform_set_drvdata(pdev, NULL);
return 0;
}
static struct platform_driver pcap_regulator_driver = {
.driver = {
.name = "pcap-regulator",
.owner = THIS_MODULE,
},
.probe = pcap_regulator_probe,
.remove = __devexit_p(pcap_regulator_remove),
};
static int __init pcap_regulator_init(void)
{
return platform_driver_register(&pcap_regulator_driver);
}
static void __exit pcap_regulator_exit(void)
{
platform_driver_unregister(&pcap_regulator_driver);
}
subsys_initcall(pcap_regulator_init);
module_exit(pcap_regulator_exit);
MODULE_AUTHOR("Daniel Ribeiro <drwyrm@gmail.com>");
MODULE_DESCRIPTION("PCAP2 Regulator Driver");
MODULE_LICENSE("GPL");
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