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dd43193976
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>
55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Hardware monitoring driver for Maxim MAX20751
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*
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* Copyright (c) 2015 Guenter Roeck
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include "pmbus.h"
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static struct pmbus_driver_info max20751_info = {
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.pages = 1,
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.format[PSC_VOLTAGE_IN] = linear,
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.format[PSC_VOLTAGE_OUT] = vid,
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.vrm_version[0] = vr12,
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.format[PSC_TEMPERATURE] = linear,
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.format[PSC_CURRENT_OUT] = linear,
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.format[PSC_POWER] = linear,
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.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
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PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
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PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
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PMBUS_HAVE_POUT,
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};
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static int max20751_probe(struct i2c_client *client)
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{
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return pmbus_do_probe(client, &max20751_info);
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}
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static const struct i2c_device_id max20751_id[] = {
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{"max20751", 0},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, max20751_id);
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static struct i2c_driver max20751_driver = {
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.driver = {
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.name = "max20751",
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},
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.probe_new = max20751_probe,
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.remove = pmbus_do_remove,
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.id_table = max20751_id,
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};
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module_i2c_driver(max20751_driver);
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MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
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MODULE_DESCRIPTION("PMBus driver for Maxim MAX20751");
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MODULE_LICENSE("GPL");
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