mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-14 18:36:42 +07:00
07e4049ae0
i2c_device_id are not supposed to change at runtime. All functions working with i2c_device_id provided by <linux/i2c.h> work with const i2c_device_id. So mark the non-const structs as const. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
239 lines
5.5 KiB
C
239 lines
5.5 KiB
C
/*
|
|
* isl29020.c - Intersil ALS Driver
|
|
*
|
|
* Copyright (C) 2008 Intel Corp
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*
|
|
* 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; version 2 of the License.
|
|
*
|
|
* 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.
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*
|
|
* Data sheet at: http://www.intersil.com/data/fn/fn6505.pdf
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/err.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/sysfs.h>
|
|
#include <linux/pm_runtime.h>
|
|
|
|
static DEFINE_MUTEX(mutex);
|
|
|
|
static ssize_t als_sensing_range_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
int val;
|
|
|
|
val = i2c_smbus_read_byte_data(client, 0x00);
|
|
|
|
if (val < 0)
|
|
return val;
|
|
return sprintf(buf, "%d000\n", 1 << (2 * (val & 3)));
|
|
|
|
}
|
|
|
|
static ssize_t als_lux_input_data_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
int ret_val, val;
|
|
unsigned long int lux;
|
|
int temp;
|
|
|
|
pm_runtime_get_sync(dev);
|
|
msleep(100);
|
|
|
|
mutex_lock(&mutex);
|
|
temp = i2c_smbus_read_byte_data(client, 0x02); /* MSB data */
|
|
if (temp < 0) {
|
|
pm_runtime_put_sync(dev);
|
|
mutex_unlock(&mutex);
|
|
return temp;
|
|
}
|
|
|
|
ret_val = i2c_smbus_read_byte_data(client, 0x01); /* LSB data */
|
|
mutex_unlock(&mutex);
|
|
|
|
if (ret_val < 0) {
|
|
pm_runtime_put_sync(dev);
|
|
return ret_val;
|
|
}
|
|
|
|
ret_val |= temp << 8;
|
|
val = i2c_smbus_read_byte_data(client, 0x00);
|
|
pm_runtime_put_sync(dev);
|
|
if (val < 0)
|
|
return val;
|
|
lux = ((((1 << (2 * (val & 3))))*1000) * ret_val) / 65536;
|
|
return sprintf(buf, "%ld\n", lux);
|
|
}
|
|
|
|
static ssize_t als_sensing_range_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
int ret_val;
|
|
unsigned long val;
|
|
|
|
ret_val = kstrtoul(buf, 10, &val);
|
|
if (ret_val)
|
|
return ret_val;
|
|
|
|
if (val < 1 || val > 64000)
|
|
return -EINVAL;
|
|
|
|
/* Pick the smallest sensor range that will meet our requirements */
|
|
if (val <= 1000)
|
|
val = 1;
|
|
else if (val <= 4000)
|
|
val = 2;
|
|
else if (val <= 16000)
|
|
val = 3;
|
|
else
|
|
val = 4;
|
|
|
|
ret_val = i2c_smbus_read_byte_data(client, 0x00);
|
|
if (ret_val < 0)
|
|
return ret_val;
|
|
|
|
ret_val &= 0xFC; /*reset the bit before setting them */
|
|
ret_val |= val - 1;
|
|
ret_val = i2c_smbus_write_byte_data(client, 0x00, ret_val);
|
|
|
|
if (ret_val < 0)
|
|
return ret_val;
|
|
return count;
|
|
}
|
|
|
|
static void als_set_power_state(struct i2c_client *client, int enable)
|
|
{
|
|
int ret_val;
|
|
|
|
ret_val = i2c_smbus_read_byte_data(client, 0x00);
|
|
if (ret_val < 0)
|
|
return;
|
|
|
|
if (enable)
|
|
ret_val |= 0x80;
|
|
else
|
|
ret_val &= 0x7F;
|
|
|
|
i2c_smbus_write_byte_data(client, 0x00, ret_val);
|
|
}
|
|
|
|
static DEVICE_ATTR(lux0_sensor_range, S_IRUGO | S_IWUSR,
|
|
als_sensing_range_show, als_sensing_range_store);
|
|
static DEVICE_ATTR(lux0_input, S_IRUGO, als_lux_input_data_show, NULL);
|
|
|
|
static struct attribute *mid_att_als[] = {
|
|
&dev_attr_lux0_sensor_range.attr,
|
|
&dev_attr_lux0_input.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group m_als_gr = {
|
|
.name = "isl29020",
|
|
.attrs = mid_att_als
|
|
};
|
|
|
|
static int als_set_default_config(struct i2c_client *client)
|
|
{
|
|
int retval;
|
|
|
|
retval = i2c_smbus_write_byte_data(client, 0x00, 0xc0);
|
|
if (retval < 0) {
|
|
dev_err(&client->dev, "default write failed.");
|
|
return retval;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int isl29020_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
int res;
|
|
|
|
res = als_set_default_config(client);
|
|
if (res < 0)
|
|
return res;
|
|
|
|
res = sysfs_create_group(&client->dev.kobj, &m_als_gr);
|
|
if (res) {
|
|
dev_err(&client->dev, "isl29020: device create file failed\n");
|
|
return res;
|
|
}
|
|
dev_info(&client->dev, "%s isl29020: ALS chip found\n", client->name);
|
|
als_set_power_state(client, 0);
|
|
pm_runtime_enable(&client->dev);
|
|
return res;
|
|
}
|
|
|
|
static int isl29020_remove(struct i2c_client *client)
|
|
{
|
|
sysfs_remove_group(&client->dev.kobj, &m_als_gr);
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id isl29020_id[] = {
|
|
{ "isl29020", 0 },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, isl29020_id);
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
static int isl29020_runtime_suspend(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
als_set_power_state(client, 0);
|
|
return 0;
|
|
}
|
|
|
|
static int isl29020_runtime_resume(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
als_set_power_state(client, 1);
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops isl29020_pm_ops = {
|
|
.runtime_suspend = isl29020_runtime_suspend,
|
|
.runtime_resume = isl29020_runtime_resume,
|
|
};
|
|
|
|
#define ISL29020_PM_OPS (&isl29020_pm_ops)
|
|
#else /* CONFIG_PM */
|
|
#define ISL29020_PM_OPS NULL
|
|
#endif /* CONFIG_PM */
|
|
|
|
static struct i2c_driver isl29020_driver = {
|
|
.driver = {
|
|
.name = "isl29020",
|
|
.pm = ISL29020_PM_OPS,
|
|
},
|
|
.probe = isl29020_probe,
|
|
.remove = isl29020_remove,
|
|
.id_table = isl29020_id,
|
|
};
|
|
|
|
module_i2c_driver(isl29020_driver);
|
|
|
|
MODULE_AUTHOR("Kalhan Trisal <kalhan.trisal@intel.com>");
|
|
MODULE_DESCRIPTION("Intersil isl29020 ALS Driver");
|
|
MODULE_LICENSE("GPL v2");
|