linux/drivers/mfd/stmpe-i2c.c
Linus Torvalds 8bd8fd0a29 - New Device Support
- New Clocksource driver from ST
    - New MFD/ACPI/DMA drivers for Intel's Sunrisepoint PCH based platforms
    - Add support for Arizona WM8998 and WM1814
    - Add support for Dialog Semi DA9062 and DA9063
    - Add support for Kontron COMe-bBL6 and COMe-cBW6
    - Add support for X-Powers AXP152
    - Add support for Atmel, many
    - Add support for STMPE, many
    - Add support for USB in X-Powers AXP22X
 
  - Core Frameworks
    - New Base API to traverse devices and their children in reverse order
 
  - Bug Fixes
    - Fix race between runtime-suspend and IRQs
    - Obtain platform data form more reliable source
 
  - Fix-ups
    - Constifying things
    - Variable signage changes
    - Kconfig depends|selects changes
    - Make use of BIT() macro
    - Do not supply .owner attribute in *_driver structures
    - MAINTAINERS entries
    - Stop using set_irq_flags()
    - Start using irq_set_chained_handler_and_data()
    - Export DT device ID structures
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Merge tag 'mfd-for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd

Pull MFD updates from Lee Jones:
 "New Device Support:
   - New Clocksource driver from ST
   - New MFD/ACPI/DMA drivers for Intel's Sunrisepoint PCH based platforms
   - Add support for Arizona WM8998 and WM1814
   - Add support for Dialog Semi DA9062 and DA9063
   - Add support for Kontron COMe-bBL6 and COMe-cBW6
   - Add support for X-Powers AXP152
   - Add support for Atmel, many
   - Add support for STMPE, many
   - Add support for USB in X-Powers AXP22X

  Core Frameworks:
   - New Base API to traverse devices and their children in reverse order

  Bug Fixes:
   - Fix race between runtime-suspend and IRQs
   - Obtain platform data form more reliable source

  Fix-ups:
   - Constifying things
   - Variable signage changes
   - Kconfig depends|selects changes
   - Make use of BIT() macro
   - Do not supply .owner attribute in *_driver structures
   - MAINTAINERS entries
   - Stop using set_irq_flags()
   - Start using irq_set_chained_handler_and_data()
   - Export DT device ID structures"

* tag 'mfd-for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (69 commits)
  mfd: jz4740-adc: Init mask cache in generic IRQ chip
  mfd: cros_ec: spi: Add OF match table
  mfd: stmpe: Add OF match table
  mfd: max77686: Split out regulator part from the DT binding
  mfd: Add DT binding for Maxim MAX77802 IC
  mfd: max77686: Use a generic name for the PMIC node in the example
  mfd: max77686: Don't suggest in binding to use a deprecated property
  mfd: Add MFD_CROS_EC dependencies
  mfd: cros_ec: Remove CROS_EC_PROTO dependency for SPI and I2C drivers
  mfd: axp20x: Add a cell for the usb power_supply part of the axp20x PMICs
  mfd: axp20x: Add missing registers, and mark more registers volatile
  mfd: arizona: Fixup some formatting/white space errors
  mfd: wm8994: Fix NULL pointer exception on missing pdata
  of: Add vendor prefix for Nuvoton
  mfd: mt6397: Implement wake handler and suspend/resume to handle wake up event
  mfd: atmel-hlcdc: Add support for new SoCs
  mfd: Export OF module alias information in missing drivers
  mfd: stw481x: Export I2C module alias information
  mfd: da9062: Support for the DA9063 OnKey in the DA9062 core
  mfd: max899x: Avoid redundant irq_data lookup
  ...
2015-09-04 11:35:03 -07:00

140 lines
3.5 KiB
C

/*
* ST Microelectronics MFD: stmpe's i2c client specific driver
*
* Copyright (C) ST-Ericsson SA 2010
* Copyright (C) ST Microelectronics SA 2011
*
* License Terms: GNU General Public License, version 2
* Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
* Author: Viresh Kumar <vireshk@kernel.org> for ST Microelectronics
*/
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/of_device.h>
#include "stmpe.h"
static int i2c_reg_read(struct stmpe *stmpe, u8 reg)
{
struct i2c_client *i2c = stmpe->client;
return i2c_smbus_read_byte_data(i2c, reg);
}
static int i2c_reg_write(struct stmpe *stmpe, u8 reg, u8 val)
{
struct i2c_client *i2c = stmpe->client;
return i2c_smbus_write_byte_data(i2c, reg, val);
}
static int i2c_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values)
{
struct i2c_client *i2c = stmpe->client;
return i2c_smbus_read_i2c_block_data(i2c, reg, length, values);
}
static int i2c_block_write(struct stmpe *stmpe, u8 reg, u8 length,
const u8 *values)
{
struct i2c_client *i2c = stmpe->client;
return i2c_smbus_write_i2c_block_data(i2c, reg, length, values);
}
static struct stmpe_client_info i2c_ci = {
.read_byte = i2c_reg_read,
.write_byte = i2c_reg_write,
.read_block = i2c_block_read,
.write_block = i2c_block_write,
};
static const struct of_device_id stmpe_of_match[] = {
{ .compatible = "st,stmpe610", .data = (void *)STMPE610, },
{ .compatible = "st,stmpe801", .data = (void *)STMPE801, },
{ .compatible = "st,stmpe811", .data = (void *)STMPE811, },
{ .compatible = "st,stmpe1601", .data = (void *)STMPE1601, },
{ .compatible = "st,stmpe1801", .data = (void *)STMPE1801, },
{ .compatible = "st,stmpe2401", .data = (void *)STMPE2401, },
{ .compatible = "st,stmpe2403", .data = (void *)STMPE2403, },
{},
};
MODULE_DEVICE_TABLE(of, stmpe_of_match);
static int
stmpe_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
{
enum stmpe_partnum partnum;
const struct of_device_id *of_id;
i2c_ci.data = (void *)id;
i2c_ci.irq = i2c->irq;
i2c_ci.client = i2c;
i2c_ci.dev = &i2c->dev;
of_id = of_match_device(stmpe_of_match, &i2c->dev);
if (!of_id) {
/*
* This happens when the I2C ID matches the node name
* but no real compatible string has been given.
*/
dev_info(&i2c->dev, "matching on node name, compatible is preferred\n");
partnum = id->driver_data;
} else
partnum = (enum stmpe_partnum)of_id->data;
return stmpe_probe(&i2c_ci, partnum);
}
static int stmpe_i2c_remove(struct i2c_client *i2c)
{
struct stmpe *stmpe = dev_get_drvdata(&i2c->dev);
return stmpe_remove(stmpe);
}
static const struct i2c_device_id stmpe_i2c_id[] = {
{ "stmpe610", STMPE610 },
{ "stmpe801", STMPE801 },
{ "stmpe811", STMPE811 },
{ "stmpe1601", STMPE1601 },
{ "stmpe1801", STMPE1801 },
{ "stmpe2401", STMPE2401 },
{ "stmpe2403", STMPE2403 },
{ }
};
MODULE_DEVICE_TABLE(i2c, stmpe_id);
static struct i2c_driver stmpe_i2c_driver = {
.driver = {
.name = "stmpe-i2c",
#ifdef CONFIG_PM
.pm = &stmpe_dev_pm_ops,
#endif
.of_match_table = stmpe_of_match,
},
.probe = stmpe_i2c_probe,
.remove = stmpe_i2c_remove,
.id_table = stmpe_i2c_id,
};
static int __init stmpe_init(void)
{
return i2c_add_driver(&stmpe_i2c_driver);
}
subsys_initcall(stmpe_init);
static void __exit stmpe_exit(void)
{
i2c_del_driver(&stmpe_i2c_driver);
}
module_exit(stmpe_exit);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("STMPE MFD I2C Interface Driver");
MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>");