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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-23 12:43:55 +08:00
linux-next/drivers/mfd/max77686.c
Linus Torvalds 12e7b0a627 - New Drivers
- Freescale Touch Screen ADC
    - X-Powers AXP PMIC with RSB
    - TI TPS65086 Power Management IC (PMIC)
  - New Device Support
    - Supply device PCI IDs for Intel Broxton
  - Fix-ups
    - Move to clkdev_create() API; intel_quark_i2c_gpio
    - Complete re-write of TI's TPS65912 Power Management IC (PMIC)
    - Remove unnecessary function argument; axp20x
    - Separate out bus related code; axp20x
    - Coding Style changes; axp20x
    - Allow more drivers to be compiled as modules
    - Work around false positive 'used uninitialised' warning; db8500-prcmu
  - Bug Fixes
    - Remove do_div(); fsl-imx25-gcq
    - Fix driver init when built-in; tps65010
    - Fix clock-unregister leak; intel-lpss
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Merge tag 'mfd-for-linus-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd

Pull MFD updates from Lee Jones:
 "New Drivers:
   - Freescale Touch Screen ADC
   - X-Powers AXP PMIC with RSB
   - TI TPS65086 Power Management IC (PMIC)

  New Device Support:
   - Supply device PCI IDs for Intel Broxton

  Fix-ups:
   - Move to clkdev_create() API; intel_quark_i2c_gpio
   - Complete re-write of TI's TPS65912 Power Management IC (PMIC)
   - Remove unnecessary function argument; axp20x
   - Separate out bus related code; axp20x
   - Coding Style changes; axp20x
   - Allow more drivers to be compiled as modules
   - Work around false positive 'used uninitialised' warning; db8500-prcmu

  Bug Fixes:
   - Remove do_div(); fsl-imx25-gcq
   - Fix driver init when built-in; tps65010
   - Fix clock-unregister leak; intel-lpss"

* tag 'mfd-for-linus-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (53 commits)
  mfd: intel-lpss: Pass I2C configuration via properties on BXT
  mfd: imx6sx: Add PCIe register definitions for iomuxc gpr
  mfd: ipaq-micro: Use __maybe_unused to hide pm functions
  mfd: max77686: Add max77802 to I2C device ID table
  mfd: max77686: Export OF module alias information
  mfd: max77686: Allow driver to be built as a module
  mfd: stmpe: Add the proper PWM resources
  mfd: tps65090: Set regmap config reg counts properly
  mfd: syscon: Return ENOTSUPP instead of ENOSYS when disabled
  mfd: as3711: Set regmap config reg counts properly
  mfd: rc5t583: Set regmap config reg counts properly
  gpio: tps65086: Add GPO driver for the TPS65086 PMIC
  mfd: mt6397: Add platform device ID table
  mfd: da9063: Fix missing volatile registers in the core regmap_range volatile lists
  mfd: mt6397: Add MT6323 support to MT6397 driver
  mfd: mt6397: Add support for different Slave types
  mfd: mt6397: int_con and int_status may vary in location
  dt-bindings: mfd: Add bindings for the MediaTek MT6323 PMIC
  mfd: da9062: Fix missing volatile registers in the core regmap_range volatile lists
  mfd: Add documentation for ACT8945A DT bindings
  ...
2016-03-18 10:15:11 -07:00

340 lines
9.2 KiB
C

/*
* max77686.c - mfd core driver for the Maxim 77686/802
*
* Copyright (C) 2012 Samsung Electronics
* Chiwoong Byun <woong.byun@smasung.com>
* Jonghwa Lee <jonghwa3.lee@samsung.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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* This driver is based on max8997.c
*/
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/pm_runtime.h>
#include <linux/module.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max77686.h>
#include <linux/mfd/max77686-private.h>
#include <linux/err.h>
#include <linux/of.h>
static const struct mfd_cell max77686_devs[] = {
{ .name = "max77686-pmic", },
{ .name = "max77686-rtc", },
{ .name = "max77686-clk", },
};
static const struct mfd_cell max77802_devs[] = {
{ .name = "max77802-pmic", },
{ .name = "max77802-clk", },
{ .name = "max77802-rtc", },
};
static bool max77802_pmic_is_accessible_reg(struct device *dev,
unsigned int reg)
{
return reg < MAX77802_REG_PMIC_END;
}
static bool max77802_rtc_is_accessible_reg(struct device *dev,
unsigned int reg)
{
return (reg >= MAX77802_RTC_INT && reg < MAX77802_RTC_END);
}
static bool max77802_is_accessible_reg(struct device *dev, unsigned int reg)
{
return (max77802_pmic_is_accessible_reg(dev, reg) ||
max77802_rtc_is_accessible_reg(dev, reg));
}
static bool max77802_pmic_is_precious_reg(struct device *dev, unsigned int reg)
{
return (reg == MAX77802_REG_INTSRC || reg == MAX77802_REG_INT1 ||
reg == MAX77802_REG_INT2);
}
static bool max77802_rtc_is_precious_reg(struct device *dev, unsigned int reg)
{
return (reg == MAX77802_RTC_INT ||
reg == MAX77802_RTC_UPDATE0 ||
reg == MAX77802_RTC_UPDATE1);
}
static bool max77802_is_precious_reg(struct device *dev, unsigned int reg)
{
return (max77802_pmic_is_precious_reg(dev, reg) ||
max77802_rtc_is_precious_reg(dev, reg));
}
static bool max77802_pmic_is_volatile_reg(struct device *dev, unsigned int reg)
{
return (max77802_is_precious_reg(dev, reg) ||
reg == MAX77802_REG_STATUS1 || reg == MAX77802_REG_STATUS2 ||
reg == MAX77802_REG_PWRON);
}
static bool max77802_rtc_is_volatile_reg(struct device *dev, unsigned int reg)
{
return (max77802_rtc_is_precious_reg(dev, reg) ||
reg == MAX77802_RTC_SEC ||
reg == MAX77802_RTC_MIN ||
reg == MAX77802_RTC_HOUR ||
reg == MAX77802_RTC_WEEKDAY ||
reg == MAX77802_RTC_MONTH ||
reg == MAX77802_RTC_YEAR ||
reg == MAX77802_RTC_DATE);
}
static bool max77802_is_volatile_reg(struct device *dev, unsigned int reg)
{
return (max77802_pmic_is_volatile_reg(dev, reg) ||
max77802_rtc_is_volatile_reg(dev, reg));
}
static const struct regmap_config max77686_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static const struct regmap_config max77802_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.writeable_reg = max77802_is_accessible_reg,
.readable_reg = max77802_is_accessible_reg,
.precious_reg = max77802_is_precious_reg,
.volatile_reg = max77802_is_volatile_reg,
.name = "max77802-pmic",
.cache_type = REGCACHE_RBTREE,
};
static const struct regmap_irq max77686_irqs[] = {
/* INT1 interrupts */
{ .reg_offset = 0, .mask = MAX77686_INT1_PWRONF_MSK, },
{ .reg_offset = 0, .mask = MAX77686_INT1_PWRONR_MSK, },
{ .reg_offset = 0, .mask = MAX77686_INT1_JIGONBF_MSK, },
{ .reg_offset = 0, .mask = MAX77686_INT1_JIGONBR_MSK, },
{ .reg_offset = 0, .mask = MAX77686_INT1_ACOKBF_MSK, },
{ .reg_offset = 0, .mask = MAX77686_INT1_ACOKBR_MSK, },
{ .reg_offset = 0, .mask = MAX77686_INT1_ONKEY1S_MSK, },
{ .reg_offset = 0, .mask = MAX77686_INT1_MRSTB_MSK, },
/* INT2 interrupts */
{ .reg_offset = 1, .mask = MAX77686_INT2_140C_MSK, },
{ .reg_offset = 1, .mask = MAX77686_INT2_120C_MSK, },
};
static const struct regmap_irq_chip max77686_irq_chip = {
.name = "max77686-pmic",
.status_base = MAX77686_REG_INT1,
.mask_base = MAX77686_REG_INT1MSK,
.num_regs = 2,
.irqs = max77686_irqs,
.num_irqs = ARRAY_SIZE(max77686_irqs),
};
static const struct regmap_irq_chip max77802_irq_chip = {
.name = "max77802-pmic",
.status_base = MAX77802_REG_INT1,
.mask_base = MAX77802_REG_INT1MSK,
.num_regs = 2,
.irqs = max77686_irqs, /* same masks as 77686 */
.num_irqs = ARRAY_SIZE(max77686_irqs),
};
static const struct of_device_id max77686_pmic_dt_match[] = {
{
.compatible = "maxim,max77686",
.data = (void *)TYPE_MAX77686,
},
{
.compatible = "maxim,max77802",
.data = (void *)TYPE_MAX77802,
},
{ },
};
MODULE_DEVICE_TABLE(of, max77686_pmic_dt_match);
static int max77686_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct max77686_dev *max77686 = NULL;
const struct of_device_id *match;
unsigned int data;
int ret = 0;
const struct regmap_config *config;
const struct regmap_irq_chip *irq_chip;
const struct mfd_cell *cells;
int n_devs;
max77686 = devm_kzalloc(&i2c->dev,
sizeof(struct max77686_dev), GFP_KERNEL);
if (!max77686)
return -ENOMEM;
if (i2c->dev.of_node) {
match = of_match_node(max77686_pmic_dt_match, i2c->dev.of_node);
if (!match)
return -EINVAL;
max77686->type = (unsigned long)match->data;
} else
max77686->type = id->driver_data;
i2c_set_clientdata(i2c, max77686);
max77686->dev = &i2c->dev;
max77686->i2c = i2c;
max77686->irq = i2c->irq;
if (max77686->type == TYPE_MAX77686) {
config = &max77686_regmap_config;
irq_chip = &max77686_irq_chip;
cells = max77686_devs;
n_devs = ARRAY_SIZE(max77686_devs);
} else {
config = &max77802_regmap_config;
irq_chip = &max77802_irq_chip;
cells = max77802_devs;
n_devs = ARRAY_SIZE(max77802_devs);
}
max77686->regmap = devm_regmap_init_i2c(i2c, config);
if (IS_ERR(max77686->regmap)) {
ret = PTR_ERR(max77686->regmap);
dev_err(max77686->dev, "Failed to allocate register map: %d\n",
ret);
return ret;
}
ret = regmap_read(max77686->regmap, MAX77686_REG_DEVICE_ID, &data);
if (ret < 0) {
dev_err(max77686->dev,
"device not found on this channel (this is not an error)\n");
return -ENODEV;
}
ret = regmap_add_irq_chip(max77686->regmap, max77686->irq,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
IRQF_SHARED, 0, irq_chip,
&max77686->irq_data);
if (ret < 0) {
dev_err(&i2c->dev, "failed to add PMIC irq chip: %d\n", ret);
return ret;
}
ret = mfd_add_devices(max77686->dev, -1, cells, n_devs, NULL, 0, NULL);
if (ret < 0) {
dev_err(&i2c->dev, "failed to add MFD devices: %d\n", ret);
goto err_del_irqc;
}
return 0;
err_del_irqc:
regmap_del_irq_chip(max77686->irq, max77686->irq_data);
return ret;
}
static int max77686_i2c_remove(struct i2c_client *i2c)
{
struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
mfd_remove_devices(max77686->dev);
regmap_del_irq_chip(max77686->irq, max77686->irq_data);
return 0;
}
static const struct i2c_device_id max77686_i2c_id[] = {
{ "max77686", TYPE_MAX77686 },
{ "max77802", TYPE_MAX77802 },
{ }
};
MODULE_DEVICE_TABLE(i2c, max77686_i2c_id);
#ifdef CONFIG_PM_SLEEP
static int max77686_suspend(struct device *dev)
{
struct i2c_client *i2c = to_i2c_client(dev);
struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
if (device_may_wakeup(dev))
enable_irq_wake(max77686->irq);
/*
* IRQ must be disabled during suspend because if it happens
* while suspended it will be handled before resuming I2C.
*
* When device is woken up from suspend (e.g. by RTC wake alarm),
* an interrupt occurs before resuming I2C bus controller.
* Interrupt handler tries to read registers but this read
* will fail because I2C is still suspended.
*/
disable_irq(max77686->irq);
return 0;
}
static int max77686_resume(struct device *dev)
{
struct i2c_client *i2c = to_i2c_client(dev);
struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
if (device_may_wakeup(dev))
disable_irq_wake(max77686->irq);
enable_irq(max77686->irq);
return 0;
}
#endif /* CONFIG_PM_SLEEP */
static SIMPLE_DEV_PM_OPS(max77686_pm, max77686_suspend, max77686_resume);
static struct i2c_driver max77686_i2c_driver = {
.driver = {
.name = "max77686",
.pm = &max77686_pm,
.of_match_table = of_match_ptr(max77686_pmic_dt_match),
},
.probe = max77686_i2c_probe,
.remove = max77686_i2c_remove,
.id_table = max77686_i2c_id,
};
static int __init max77686_i2c_init(void)
{
return i2c_add_driver(&max77686_i2c_driver);
}
/* init early so consumer devices can complete system boot */
subsys_initcall(max77686_i2c_init);
static void __exit max77686_i2c_exit(void)
{
i2c_del_driver(&max77686_i2c_driver);
}
module_exit(max77686_i2c_exit);
MODULE_DESCRIPTION("MAXIM 77686/802 multi-function core driver");
MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
MODULE_LICENSE("GPL");