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hwmon: (it87) Allow multiple chip IDs for force_id

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Extend the force_id module parameter to allow specifying one or both
chip IDs separately.  If only a single parameter is given it defaults
to using that value for all chips, similar to previous usage.

Signed-off-by: Frank Crawford <frank@crawford.emu.id.au>
Link: https://lore.kernel.org/r/20230128060308.1549707-6-frank@crawford.emu.id.au
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Frank Crawford 2023-01-28 17:03:06 +11:00 committed by Guenter Roeck
parent f09c796505
commit 2a64e9d445
1 changed files with 13 additions and 8 deletions
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21
drivers/hwmon/it87.c
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@ -175,8 +175,9 @@ static inline void superio_exit(int ioreg, bool noexit)
#define IT87_SIO_VID_REG 0xfc /* VID value */
#define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */
/* Force chip ID to specified value. Should only be used for testing */
static unsigned short force_id;
/* Force chip IDs to specified values. Should only be used for testing */
static unsigned short force_id[2];
static unsigned int force_id_cnt;
/* ACPI resource conflicts are ignored if this parameter is set to 1 */
static bool ignore_resource_conflict;
@ -2410,7 +2411,7 @@ static const struct attribute_group it87_group_auto_pwm = {
/* SuperIO detection - will change isa_address if a chip is found */
static int __init it87_find(int sioaddr, unsigned short *address,
struct it87_sio_data *sio_data)
struct it87_sio_data *sio_data, int chip_cnt)
{
int err;
u16 chip_type;
@ -2426,8 +2427,12 @@ static int __init it87_find(int sioaddr, unsigned short *address,
if (chip_type == 0xffff)
goto exit;
if (force_id)
chip_type = force_id;
if (force_id_cnt == 1) {
/* If only one value given use for all chips */
if (force_id[0])
chip_type = force_id[0];
} else if (force_id[chip_cnt])
chip_type = force_id[chip_cnt];
switch (chip_type) {
case IT8705F_DEVID:
@ -3419,7 +3424,7 @@ static int __init sm_it87_init(void)
for (i = 0; i < ARRAY_SIZE(sioaddr); i++) {
memset(&sio_data, 0, sizeof(struct it87_sio_data));
isa_address[i] = 0;
err = it87_find(sioaddr[i], &isa_address[i], &sio_data);
err = it87_find(sioaddr[i], &isa_address[i], &sio_data, i);
if (err || isa_address[i] == 0)
continue;
/*
@ -3468,8 +3473,8 @@ static void __exit sm_it87_exit(void)
MODULE_AUTHOR("Chris Gauthron, Jean Delvare <jdelvare@suse.de>");
MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
module_param(force_id, ushort, 0);
MODULE_PARM_DESC(force_id, "Override the detected device ID");
module_param_array(force_id, ushort, &force_id_cnt, 0);
MODULE_PARM_DESC(force_id, "Override one or more detected device ID(s)");
module_param(ignore_resource_conflict, bool, 0);
MODULE_PARM_DESC(ignore_resource_conflict, "Ignore ACPI resource conflict");