diff mbox series

[v1,5/7] hwmon: (it87) Allow multiple chip IDs for force_id

Message ID 20230126040223.986189-6-frank@crawford.emu.id.au (mailing list archive)
State Superseded
Headers show
Series hwmon: (it87) Complete handling multi-chip configuration | expand

Commit Message

Frank Crawford Jan. 26, 2023, 4:02 a.m. UTC 
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>
---
 drivers/hwmon/it87.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)
diff mbox series

Patch

diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 5ca8449887da..e8eeedd23bee 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -175,8 +175,9 @@  static inline void superio_exit(int ioreg, bool doexit)
 #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;
@@ -2405,7 +2406,7 @@  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;
@@ -2422,8 +2423,12 @@  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:
@@ -3426,7 +3431,7 @@  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;
 		/*
@@ -3475,8 +3480,8 @@  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");