mirror of
https://github.com/torvalds/linux.git
synced 2024-11-26 22:21:42 +00:00
f050bb8f56
After commitb8a1a4cd5a("i2c: Provide a temporary .probe_new() call-back type"), all drivers being converted to .probe_new() and then03c835f498("i2c: Switch .probe() to not take an id parameter") convert back to (the new) .probe() to be able to eventually drop .probe_new() from struct i2c_driver. While touching these drivers, fix alignment in apds990x.c and bh1770glc.c. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Link: https://lore.kernel.org/r/20230517220135.170379-1-u.kleine-koenig@pengutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
144 lines
3.4 KiB
C
144 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* hmc6352.c - Honeywell Compass Driver
|
|
*
|
|
* Copyright (C) 2009 Intel Corp
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*/
|
|
|
|
#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/nospec.h>
|
|
|
|
static DEFINE_MUTEX(compass_mutex);
|
|
|
|
static int compass_command(struct i2c_client *c, u8 cmd)
|
|
{
|
|
int ret = i2c_master_send(c, &cmd, 1);
|
|
if (ret < 0)
|
|
dev_warn(&c->dev, "command '%c' failed.\n", cmd);
|
|
return ret;
|
|
}
|
|
|
|
static int compass_store(struct device *dev, const char *buf, size_t count,
|
|
const char *map)
|
|
{
|
|
struct i2c_client *c = to_i2c_client(dev);
|
|
int ret;
|
|
unsigned long val;
|
|
|
|
ret = kstrtoul(buf, 10, &val);
|
|
if (ret)
|
|
return ret;
|
|
if (val >= strlen(map))
|
|
return -EINVAL;
|
|
val = array_index_nospec(val, strlen(map));
|
|
mutex_lock(&compass_mutex);
|
|
ret = compass_command(c, map[val]);
|
|
mutex_unlock(&compass_mutex);
|
|
if (ret < 0)
|
|
return ret;
|
|
return count;
|
|
}
|
|
|
|
static ssize_t compass_calibration_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
return compass_store(dev, buf, count, "EC");
|
|
}
|
|
|
|
static ssize_t compass_power_mode_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
return compass_store(dev, buf, count, "SW");
|
|
}
|
|
|
|
static ssize_t compass_heading_data_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
unsigned char i2c_data[2];
|
|
int ret;
|
|
|
|
mutex_lock(&compass_mutex);
|
|
ret = compass_command(client, 'A');
|
|
if (ret != 1) {
|
|
mutex_unlock(&compass_mutex);
|
|
return ret;
|
|
}
|
|
msleep(10); /* sending 'A' cmd we need to wait for 7-10 millisecs */
|
|
ret = i2c_master_recv(client, i2c_data, 2);
|
|
mutex_unlock(&compass_mutex);
|
|
if (ret < 0) {
|
|
dev_warn(dev, "i2c read data cmd failed\n");
|
|
return ret;
|
|
}
|
|
ret = (i2c_data[0] << 8) | i2c_data[1];
|
|
return sprintf(buf, "%d.%d\n", ret/10, ret%10);
|
|
}
|
|
|
|
|
|
static DEVICE_ATTR(heading0_input, S_IRUGO, compass_heading_data_show, NULL);
|
|
static DEVICE_ATTR(calibration, S_IWUSR, NULL, compass_calibration_store);
|
|
static DEVICE_ATTR(power_state, S_IWUSR, NULL, compass_power_mode_store);
|
|
|
|
static struct attribute *mid_att_compass[] = {
|
|
&dev_attr_heading0_input.attr,
|
|
&dev_attr_calibration.attr,
|
|
&dev_attr_power_state.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group m_compass_gr = {
|
|
.name = "hmc6352",
|
|
.attrs = mid_att_compass
|
|
};
|
|
|
|
static int hmc6352_probe(struct i2c_client *client)
|
|
{
|
|
int res;
|
|
|
|
res = sysfs_create_group(&client->dev.kobj, &m_compass_gr);
|
|
if (res) {
|
|
dev_err(&client->dev, "device_create_file failed\n");
|
|
return res;
|
|
}
|
|
dev_info(&client->dev, "%s HMC6352 compass chip found\n",
|
|
client->name);
|
|
return 0;
|
|
}
|
|
|
|
static void hmc6352_remove(struct i2c_client *client)
|
|
{
|
|
sysfs_remove_group(&client->dev.kobj, &m_compass_gr);
|
|
}
|
|
|
|
static const struct i2c_device_id hmc6352_id[] = {
|
|
{ "hmc6352", 0 },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, hmc6352_id);
|
|
|
|
static struct i2c_driver hmc6352_driver = {
|
|
.driver = {
|
|
.name = "hmc6352",
|
|
},
|
|
.probe = hmc6352_probe,
|
|
.remove = hmc6352_remove,
|
|
.id_table = hmc6352_id,
|
|
};
|
|
|
|
module_i2c_driver(hmc6352_driver);
|
|
|
|
MODULE_AUTHOR("Kalhan Trisal <kalhan.trisal@intel.com");
|
|
MODULE_DESCRIPTION("hmc6352 Compass Driver");
|
|
MODULE_LICENSE("GPL v2");
|