mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 20:23:57 +08:00
380c09f648
This reduces code clutter a bit and will ease an migration to genirq. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
398 lines
8.6 KiB
C
398 lines
8.6 KiB
C
/* NXP PCF50633 Power Management Unit (PMU) driver
|
|
*
|
|
* (C) 2006-2008 by Openmoko, Inc.
|
|
* Author: Harald Welte <laforge@openmoko.org>
|
|
* Balaji Rao <balajirrao@openmoko.org>
|
|
* All rights reserved.
|
|
*
|
|
* 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/device.h>
|
|
#include <linux/sysfs.h>
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/mfd/pcf50633/core.h>
|
|
|
|
int pcf50633_irq_init(struct pcf50633 *pcf, int irq);
|
|
void pcf50633_irq_free(struct pcf50633 *pcf);
|
|
#ifdef CONFIG_PM
|
|
int pcf50633_irq_suspend(struct pcf50633 *pcf);
|
|
int pcf50633_irq_resume(struct pcf50633 *pcf);
|
|
#endif
|
|
|
|
static int __pcf50633_read(struct pcf50633 *pcf, u8 reg, int num, u8 *data)
|
|
{
|
|
int ret;
|
|
|
|
ret = i2c_smbus_read_i2c_block_data(pcf->i2c_client, reg,
|
|
num, data);
|
|
if (ret < 0)
|
|
dev_err(pcf->dev, "Error reading %d regs at %d\n", num, reg);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __pcf50633_write(struct pcf50633 *pcf, u8 reg, int num, u8 *data)
|
|
{
|
|
int ret;
|
|
|
|
ret = i2c_smbus_write_i2c_block_data(pcf->i2c_client, reg,
|
|
num, data);
|
|
if (ret < 0)
|
|
dev_err(pcf->dev, "Error writing %d regs at %d\n", num, reg);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
/* Read a block of upto 32 regs */
|
|
int pcf50633_read_block(struct pcf50633 *pcf, u8 reg,
|
|
int nr_regs, u8 *data)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(&pcf->lock);
|
|
ret = __pcf50633_read(pcf, reg, nr_regs, data);
|
|
mutex_unlock(&pcf->lock);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pcf50633_read_block);
|
|
|
|
/* Write a block of upto 32 regs */
|
|
int pcf50633_write_block(struct pcf50633 *pcf , u8 reg,
|
|
int nr_regs, u8 *data)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(&pcf->lock);
|
|
ret = __pcf50633_write(pcf, reg, nr_regs, data);
|
|
mutex_unlock(&pcf->lock);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pcf50633_write_block);
|
|
|
|
u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg)
|
|
{
|
|
u8 val;
|
|
|
|
mutex_lock(&pcf->lock);
|
|
__pcf50633_read(pcf, reg, 1, &val);
|
|
mutex_unlock(&pcf->lock);
|
|
|
|
return val;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pcf50633_reg_read);
|
|
|
|
int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(&pcf->lock);
|
|
ret = __pcf50633_write(pcf, reg, 1, &val);
|
|
mutex_unlock(&pcf->lock);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pcf50633_reg_write);
|
|
|
|
int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val)
|
|
{
|
|
int ret;
|
|
u8 tmp;
|
|
|
|
val &= mask;
|
|
|
|
mutex_lock(&pcf->lock);
|
|
ret = __pcf50633_read(pcf, reg, 1, &tmp);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
tmp &= ~mask;
|
|
tmp |= val;
|
|
ret = __pcf50633_write(pcf, reg, 1, &tmp);
|
|
|
|
out:
|
|
mutex_unlock(&pcf->lock);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask);
|
|
|
|
int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val)
|
|
{
|
|
int ret;
|
|
u8 tmp;
|
|
|
|
mutex_lock(&pcf->lock);
|
|
ret = __pcf50633_read(pcf, reg, 1, &tmp);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
tmp &= ~val;
|
|
ret = __pcf50633_write(pcf, reg, 1, &tmp);
|
|
|
|
out:
|
|
mutex_unlock(&pcf->lock);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits);
|
|
|
|
/* sysfs attributes */
|
|
static ssize_t show_dump_regs(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct pcf50633 *pcf = dev_get_drvdata(dev);
|
|
u8 dump[16];
|
|
int n, n1, idx = 0;
|
|
char *buf1 = buf;
|
|
static u8 address_no_read[] = { /* must be ascending */
|
|
PCF50633_REG_INT1,
|
|
PCF50633_REG_INT2,
|
|
PCF50633_REG_INT3,
|
|
PCF50633_REG_INT4,
|
|
PCF50633_REG_INT5,
|
|
0 /* terminator */
|
|
};
|
|
|
|
for (n = 0; n < 256; n += sizeof(dump)) {
|
|
for (n1 = 0; n1 < sizeof(dump); n1++)
|
|
if (n == address_no_read[idx]) {
|
|
idx++;
|
|
dump[n1] = 0x00;
|
|
} else
|
|
dump[n1] = pcf50633_reg_read(pcf, n + n1);
|
|
|
|
hex_dump_to_buffer(dump, sizeof(dump), 16, 1, buf1, 128, 0);
|
|
buf1 += strlen(buf1);
|
|
*buf1++ = '\n';
|
|
*buf1 = '\0';
|
|
}
|
|
|
|
return buf1 - buf;
|
|
}
|
|
static DEVICE_ATTR(dump_regs, 0400, show_dump_regs, NULL);
|
|
|
|
static ssize_t show_resume_reason(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct pcf50633 *pcf = dev_get_drvdata(dev);
|
|
int n;
|
|
|
|
n = sprintf(buf, "%02x%02x%02x%02x%02x\n",
|
|
pcf->resume_reason[0],
|
|
pcf->resume_reason[1],
|
|
pcf->resume_reason[2],
|
|
pcf->resume_reason[3],
|
|
pcf->resume_reason[4]);
|
|
|
|
return n;
|
|
}
|
|
static DEVICE_ATTR(resume_reason, 0400, show_resume_reason, NULL);
|
|
|
|
static struct attribute *pcf_sysfs_entries[] = {
|
|
&dev_attr_dump_regs.attr,
|
|
&dev_attr_resume_reason.attr,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute_group pcf_attr_group = {
|
|
.name = NULL, /* put in device directory */
|
|
.attrs = pcf_sysfs_entries,
|
|
};
|
|
|
|
static void
|
|
pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
|
|
struct platform_device **pdev)
|
|
{
|
|
int ret;
|
|
|
|
*pdev = platform_device_alloc(name, -1);
|
|
if (!*pdev) {
|
|
dev_err(pcf->dev, "Falied to allocate %s\n", name);
|
|
return;
|
|
}
|
|
|
|
(*pdev)->dev.parent = pcf->dev;
|
|
|
|
ret = platform_device_add(*pdev);
|
|
if (ret) {
|
|
dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret);
|
|
platform_device_put(*pdev);
|
|
*pdev = NULL;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int pcf50633_suspend(struct i2c_client *client, pm_message_t state)
|
|
{
|
|
struct pcf50633 *pcf;
|
|
pcf = i2c_get_clientdata(client);
|
|
|
|
return pcf50633_irq_suspend(pcf);
|
|
}
|
|
|
|
static int pcf50633_resume(struct i2c_client *client)
|
|
{
|
|
struct pcf50633 *pcf;
|
|
pcf = i2c_get_clientdata(client);
|
|
|
|
return pcf50633_irq_resume(pcf);
|
|
}
|
|
#else
|
|
#define pcf50633_suspend NULL
|
|
#define pcf50633_resume NULL
|
|
#endif
|
|
|
|
static int __devinit pcf50633_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *ids)
|
|
{
|
|
struct pcf50633 *pcf;
|
|
struct pcf50633_platform_data *pdata = client->dev.platform_data;
|
|
int i, ret;
|
|
int version, variant;
|
|
|
|
if (!client->irq) {
|
|
dev_err(&client->dev, "Missing IRQ\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
pcf = kzalloc(sizeof(*pcf), GFP_KERNEL);
|
|
if (!pcf)
|
|
return -ENOMEM;
|
|
|
|
pcf->pdata = pdata;
|
|
|
|
mutex_init(&pcf->lock);
|
|
|
|
i2c_set_clientdata(client, pcf);
|
|
pcf->dev = &client->dev;
|
|
pcf->i2c_client = client;
|
|
|
|
version = pcf50633_reg_read(pcf, 0);
|
|
variant = pcf50633_reg_read(pcf, 1);
|
|
if (version < 0 || variant < 0) {
|
|
dev_err(pcf->dev, "Unable to probe pcf50633\n");
|
|
ret = -ENODEV;
|
|
goto err_free;
|
|
}
|
|
|
|
dev_info(pcf->dev, "Probed device version %d variant %d\n",
|
|
version, variant);
|
|
|
|
pcf50633_irq_init(pcf, client->irq);
|
|
|
|
/* Create sub devices */
|
|
pcf50633_client_dev_register(pcf, "pcf50633-input",
|
|
&pcf->input_pdev);
|
|
pcf50633_client_dev_register(pcf, "pcf50633-rtc",
|
|
&pcf->rtc_pdev);
|
|
pcf50633_client_dev_register(pcf, "pcf50633-mbc",
|
|
&pcf->mbc_pdev);
|
|
pcf50633_client_dev_register(pcf, "pcf50633-adc",
|
|
&pcf->adc_pdev);
|
|
pcf50633_client_dev_register(pcf, "pcf50633-backlight",
|
|
&pcf->bl_pdev);
|
|
|
|
|
|
for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
|
|
struct platform_device *pdev;
|
|
|
|
pdev = platform_device_alloc("pcf50633-regltr", i);
|
|
if (!pdev) {
|
|
dev_err(pcf->dev, "Cannot create regulator %d\n", i);
|
|
continue;
|
|
}
|
|
|
|
pdev->dev.parent = pcf->dev;
|
|
platform_device_add_data(pdev, &pdata->reg_init_data[i],
|
|
sizeof(pdata->reg_init_data[i]));
|
|
pcf->regulator_pdev[i] = pdev;
|
|
|
|
platform_device_add(pdev);
|
|
}
|
|
|
|
ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
|
|
if (ret)
|
|
dev_err(pcf->dev, "error creating sysfs entries\n");
|
|
|
|
if (pdata->probe_done)
|
|
pdata->probe_done(pcf);
|
|
|
|
return 0;
|
|
|
|
err_free:
|
|
i2c_set_clientdata(client, NULL);
|
|
kfree(pcf);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit pcf50633_remove(struct i2c_client *client)
|
|
{
|
|
struct pcf50633 *pcf = i2c_get_clientdata(client);
|
|
int i;
|
|
|
|
pcf50633_irq_free(pcf);
|
|
|
|
platform_device_unregister(pcf->input_pdev);
|
|
platform_device_unregister(pcf->rtc_pdev);
|
|
platform_device_unregister(pcf->mbc_pdev);
|
|
platform_device_unregister(pcf->adc_pdev);
|
|
|
|
for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
|
|
platform_device_unregister(pcf->regulator_pdev[i]);
|
|
|
|
i2c_set_clientdata(client, NULL);
|
|
kfree(pcf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct i2c_device_id pcf50633_id_table[] = {
|
|
{"pcf50633", 0x73},
|
|
{/* end of list */}
|
|
};
|
|
|
|
static struct i2c_driver pcf50633_driver = {
|
|
.driver = {
|
|
.name = "pcf50633",
|
|
},
|
|
.id_table = pcf50633_id_table,
|
|
.probe = pcf50633_probe,
|
|
.remove = __devexit_p(pcf50633_remove),
|
|
.suspend = pcf50633_suspend,
|
|
.resume = pcf50633_resume,
|
|
};
|
|
|
|
static int __init pcf50633_init(void)
|
|
{
|
|
return i2c_add_driver(&pcf50633_driver);
|
|
}
|
|
|
|
static void __exit pcf50633_exit(void)
|
|
{
|
|
i2c_del_driver(&pcf50633_driver);
|
|
}
|
|
|
|
MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU");
|
|
MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
subsys_initcall(pcf50633_init);
|
|
module_exit(pcf50633_exit);
|