linux/drivers/hwmon/pmbus/max20751.c
Stephen Kitt dd43193976 hwmon (pmbus) use simple i2c probe function
pmbus_do_probe doesn't use the id information provided in its second
argument, so this can be removed, which then allows using the
single-parameter i2c probe function ("probe_new") for probes.

This avoids scanning the identifier tables during probes.

Drivers which didn't use the id are converted as-is; drivers which did
are modified as follows:

* if the information in i2c_client is sufficient, that's used instead
  (client->name);
* configured v. probed comparisons are performed by comparing the
  configured name to the detected name, instead of the ids; this
  involves strcmp but is still cheaper than comparing all the device
  names when scanning the tables;
* anything else is handled by calling i2c_match_id() with the same
  level of error-handling (if any) as before.

Additionally, the mismatch message in the ltc2978 driver is adjusted
so that it no longer assumes that the driver_data is an index into
ltc2978_id.

Signed-off-by: Stephen Kitt <steve@sk2.org>
Acked-by: Wolfram Sang <wsa@kernel.org>
Link: https://lore.kernel.org/r/20200808210004.30880-1-steve@sk2.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2020-09-23 09:42:39 -07:00

55 lines
1.3 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Hardware monitoring driver for Maxim MAX20751
*
* Copyright (c) 2015 Guenter Roeck
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include "pmbus.h"
static struct pmbus_driver_info max20751_info = {
.pages = 1,
.format[PSC_VOLTAGE_IN] = linear,
.format[PSC_VOLTAGE_OUT] = vid,
.vrm_version[0] = vr12,
.format[PSC_TEMPERATURE] = linear,
.format[PSC_CURRENT_OUT] = linear,
.format[PSC_POWER] = linear,
.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
PMBUS_HAVE_POUT,
};
static int max20751_probe(struct i2c_client *client)
{
return pmbus_do_probe(client, &max20751_info);
}
static const struct i2c_device_id max20751_id[] = {
{"max20751", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, max20751_id);
static struct i2c_driver max20751_driver = {
.driver = {
.name = "max20751",
},
.probe_new = max20751_probe,
.remove = pmbus_do_remove,
.id_table = max20751_id,
};
module_i2c_driver(max20751_driver);
MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
MODULE_DESCRIPTION("PMBus driver for Maxim MAX20751");
MODULE_LICENSE("GPL");