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mfd: Move the mc13xxx-core spi specific code into a separate module 

All spi specific code is moved into a new module. The mc13xxx struct
moves to a new local include file by necessity.

A new config choice selects the SPI bus type support and by default is
value of SPI_MASTER to remain compatible with existing configs.

Signed-off-by: Marc Reilly <marc@cpdesign.com.au>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Marc Reilly 2012-04-01 16:41:38 +10:00 committed by Samuel Ortiz
parent 91b5e74118
commit a0c7c1d48e
5 changed files with 204 additions and 147 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/mfd/Kconfig
View File

@ -600,14 +600,23 @@ config MFD_MC13XXX
depends on SPI_MASTER
select MFD_CORE
select MFD_MC13783
select REGMAP_SPI
help
Support for the Freescale (Atlas) PMIC and audio CODECs
MC13783 and MC13892.
This driver provides common support for accessing the device,
Enable support for the Freescale MC13783 and MC13892 PMICs.
This driver provides common support for accessing the device,
additional drivers must be enabled in order to use the
functionality of the device.
if MFD_MC13XXX
config MFD_MC13XXX_SPI
tristate "MC13xxx SPI interface" if SPI_MASTER
default SPI_MASTER
select REGMAP_SPI
help
Select this if your MC13xxx is connected via an SPI bus.
endif
config ABX500_CORE
bool "ST-Ericsson ABX500 Mixed Signal Circuit register functions"
default y if ARCH_U300 || ARCH_U8500

1
drivers/mfd/Makefile
View File

@ -54,6 +54,7 @@ obj-$(CONFIG_TWL6030_PWM) += twl6030-pwm.o
obj-$(CONFIG_TWL6040_CORE) += twl6040-core.o twl6040-irq.o
obj-$(CONFIG_MFD_MC13XXX) += mc13xxx-core.o
obj-$(CONFIG_MFD_MC13XXX_SPI) += mc13xxx-spi.o
obj-$(CONFIG_MFD_CORE) += mfd-core.o

148
drivers/mfd/mc13xxx-core.c
View File

@ -15,36 +15,13 @@
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/spi/spi.h>
#include <linux/mfd/core.h>
#include <linux/mfd/mc13xxx.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/regmap.h>
#include <linux/err.h>
enum mc13xxx_id {
MC13XXX_ID_MC13783,
MC13XXX_ID_MC13892,
MC13XXX_ID_INVALID,
};
struct mc13xxx {
struct regmap *regmap;
struct device *dev;
enum mc13xxx_id ictype;
struct mutex lock;
int irq;
int flags;
irq_handler_t irqhandler[MC13XXX_NUM_IRQ];
void *irqdata[MC13XXX_NUM_IRQ];
int adcflags;
};
#include "mc13xxx.h"
#define MC13XXX_IRQSTAT0 0
#define MC13XXX_IRQSTAT0_ADCDONEI (1 << 0)
@ -151,8 +128,6 @@ struct mc13xxx {
#define MC13XXX_ADC2 45
#define MC13XXX_NUMREGS 0x3f
void mc13xxx_lock(struct mc13xxx *mc13xxx)
{
if (!mutex_trylock(&mc13xxx->lock)) {
@ -674,90 +649,7 @@ static inline int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx)
}
#endif
static const struct spi_device_id mc13xxx_device_id[] = {
{
.name = "mc13783",
.driver_data = MC13XXX_ID_MC13783,
}, {
.name = "mc13892",
.driver_data = MC13XXX_ID_MC13892,
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(spi, mc13xxx_device_id);
static const struct of_device_id mc13xxx_dt_ids[] = {
{ .compatible = "fsl,mc13783", .data = (void *) MC13XXX_ID_MC13783, },
{ .compatible = "fsl,mc13892", .data = (void *) MC13XXX_ID_MC13892, },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
static struct regmap_config mc13xxx_regmap_spi_config = {
.reg_bits = 7,
.pad_bits = 1,
.val_bits = 24,
.max_register = MC13XXX_NUMREGS,
.cache_type = REGCACHE_NONE,
};
static int mc13xxx_common_init(struct mc13xxx *mc13xxx,
struct mc13xxx_platform_data *pdata, int irq);
static void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx);
static int mc13xxx_spi_probe(struct spi_device *spi)
{
const struct of_device_id *of_id;
struct spi_driver *sdrv = to_spi_driver(spi->dev.driver);
struct mc13xxx *mc13xxx;
struct mc13xxx_platform_data *pdata = dev_get_platdata(&spi->dev);
int ret;
of_id = of_match_device(mc13xxx_dt_ids, &spi->dev);
if (of_id)
sdrv->id_table = &mc13xxx_device_id[(enum mc13xxx_id) of_id->data];
mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL);
if (!mc13xxx)
return -ENOMEM;
dev_set_drvdata(&spi->dev, mc13xxx);
spi->mode = SPI_MODE_0 | SPI_CS_HIGH;
spi->bits_per_word = 32;
mc13xxx->dev = &spi->dev;
mutex_init(&mc13xxx->lock);
mc13xxx->regmap = regmap_init_spi(spi, &mc13xxx_regmap_spi_config);
if (IS_ERR(mc13xxx->regmap)) {
ret = PTR_ERR(mc13xxx->regmap);
dev_err(mc13xxx->dev, "Failed to initialize register map: %d\n",
ret);
dev_set_drvdata(&spi->dev, NULL);
kfree(mc13xxx);
return ret;
}
ret = mc13xxx_common_init(mc13xxx, pdata, spi->irq);
if (ret) {
dev_set_drvdata(&spi->dev, NULL);
} else {
const struct spi_device_id *devid =
spi_get_device_id(spi);
if (!devid || devid->driver_data != mc13xxx->ictype)
dev_warn(mc13xxx->dev,
"device id doesn't match auto detection!\n");
}
return ret;
}
static int mc13xxx_common_init(struct mc13xxx *mc13xxx,
int mc13xxx_common_init(struct mc13xxx *mc13xxx,
struct mc13xxx_platform_data *pdata, int irq)
{
int ret;
@ -823,17 +715,9 @@ err_revision:
return 0;
}
EXPORT_SYMBOL_GPL(mc13xxx_common_init);
static int __devexit mc13xxx_spi_remove(struct spi_device *spi)
{
struct mc13xxx *mc13xxx = dev_get_drvdata(&spi->dev);
mc13xxx_common_cleanup(mc13xxx);
return 0;
}
static void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx)
void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx)
{
free_irq(mc13xxx->irq, mc13xxx);
@ -843,29 +727,7 @@ static void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx)
kfree(mc13xxx);
}
static struct spi_driver mc13xxx_spi_driver = {
.id_table = mc13xxx_device_id,
.driver = {
.name = "mc13xxx",
.owner = THIS_MODULE,
.of_match_table = mc13xxx_dt_ids,
},
.probe = mc13xxx_spi_probe,
.remove = __devexit_p(mc13xxx_spi_remove),
};
static int __init mc13xxx_init(void)
{
return spi_register_driver(&mc13xxx_spi_driver);
}
subsys_initcall(mc13xxx_init);
static void __exit mc13xxx_exit(void)
{
spi_unregister_driver(&mc13xxx_spi_driver);
}
module_exit(mc13xxx_exit);
EXPORT_SYMBOL_GPL(mc13xxx_common_cleanup);
MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC");
MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");

140
drivers/mfd/mc13xxx-spi.c Normal file
View File

@ -0,0 +1,140 @@
/*
* Copyright 2009-2010 Pengutronix
* Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
*
* loosely based on an earlier driver that has
* Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License version 2 as published by the
* Free Software Foundation.
*/
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/mfd/mc13xxx.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/err.h>
#include <linux/spi/spi.h>
#include "mc13xxx.h"
static const struct spi_device_id mc13xxx_device_id[] = {
{
.name = "mc13783",
.driver_data = MC13XXX_ID_MC13783,
}, {
.name = "mc13892",
.driver_data = MC13XXX_ID_MC13892,
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(spi, mc13xxx_device_id);
static const struct of_device_id mc13xxx_dt_ids[] = {
{ .compatible = "fsl,mc13783", .data = (void *) MC13XXX_ID_MC13783, },
{ .compatible = "fsl,mc13892", .data = (void *) MC13XXX_ID_MC13892, },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
static struct regmap_config mc13xxx_regmap_spi_config = {
.reg_bits = 7,
.pad_bits = 1,
.val_bits = 24,
.max_register = MC13XXX_NUMREGS,
.cache_type = REGCACHE_NONE,
};
static int mc13xxx_spi_probe(struct spi_device *spi)
{
const struct of_device_id *of_id;
struct spi_driver *sdrv = to_spi_driver(spi->dev.driver);
struct mc13xxx *mc13xxx;
struct mc13xxx_platform_data *pdata = dev_get_platdata(&spi->dev);
int ret;
of_id = of_match_device(mc13xxx_dt_ids, &spi->dev);
if (of_id)
sdrv->id_table = &mc13xxx_device_id[(enum mc13xxx_id) of_id->data];
mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL);
if (!mc13xxx)
return -ENOMEM;
dev_set_drvdata(&spi->dev, mc13xxx);
spi->mode = SPI_MODE_0 | SPI_CS_HIGH;
spi->bits_per_word = 32;
mc13xxx->dev = &spi->dev;
mutex_init(&mc13xxx->lock);
mc13xxx->regmap = regmap_init_spi(spi, &mc13xxx_regmap_spi_config);
if (IS_ERR(mc13xxx->regmap)) {
ret = PTR_ERR(mc13xxx->regmap);
dev_err(mc13xxx->dev, "Failed to initialize register map: %d\n",
ret);
dev_set_drvdata(&spi->dev, NULL);
kfree(mc13xxx);
return ret;
}
ret = mc13xxx_common_init(mc13xxx, pdata, spi->irq);
if (ret) {
dev_set_drvdata(&spi->dev, NULL);
} else {
const struct spi_device_id *devid =
spi_get_device_id(spi);
if (!devid || devid->driver_data != mc13xxx->ictype)
dev_warn(mc13xxx->dev,
"device id doesn't match auto detection!\n");
}
return ret;
}
static int __devexit mc13xxx_spi_remove(struct spi_device *spi)
{
struct mc13xxx *mc13xxx = dev_get_drvdata(&spi->dev);
mc13xxx_common_cleanup(mc13xxx);
return 0;
}
static struct spi_driver mc13xxx_spi_driver = {
.id_table = mc13xxx_device_id,
.driver = {
.name = "mc13xxx",
.owner = THIS_MODULE,
.of_match_table = mc13xxx_dt_ids,
},
.probe = mc13xxx_spi_probe,
.remove = __devexit_p(mc13xxx_spi_remove),
};
static int __init mc13xxx_init(void)
{
return spi_register_driver(&mc13xxx_spi_driver);
}
subsys_initcall(mc13xxx_init);
static void __exit mc13xxx_exit(void)
{
spi_unregister_driver(&mc13xxx_spi_driver);
}
module_exit(mc13xxx_exit);
MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC");
MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");
MODULE_LICENSE("GPL v2");

45
drivers/mfd/mc13xxx.h Normal file
View File

@ -0,0 +1,45 @@
/*
* Copyright 2012 Creative Product Design
* Marc Reilly <marc@cpdesign.com.au>
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License version 2 as published by the
* Free Software Foundation.
*/
#ifndef __DRIVERS_MFD_MC13XXX_H
#define __DRIVERS_MFD_MC13XXX_H
#include <linux/mutex.h>
#include <linux/regmap.h>
#include <linux/mfd/mc13xxx.h>
enum mc13xxx_id {
MC13XXX_ID_MC13783,
MC13XXX_ID_MC13892,
MC13XXX_ID_INVALID,
};
#define MC13XXX_NUMREGS 0x3f
struct mc13xxx {
struct regmap *regmap;
struct device *dev;
enum mc13xxx_id ictype;
struct mutex lock;
int irq;
int flags;
irq_handler_t irqhandler[MC13XXX_NUM_IRQ];
void *irqdata[MC13XXX_NUM_IRQ];
int adcflags;
};
int mc13xxx_common_init(struct mc13xxx *mc13xxx,
struct mc13xxx_platform_data *pdata, int irq);
void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx);
#endif /* __DRIVERS_MFD_MC13XXX_H */