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hwmon: (jc42) Strengthen detect function

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Configuration register bit 5 must read 0 for all JC42.4 compliant chips.
Several capability register bits must be set for all TSE2004 compliant
chips. Use that information to strengthen the detect function.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2024-06-30 13:08:40 -07:00
parent c98cf41dfb
commit b3e992f69c
1 changed files with 5 additions and 1 deletions
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6
drivers/hwmon/jc42.c
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@ -413,7 +413,11 @@ static int jc42_detect(struct i2c_client *client, struct i2c_board_info *info)
if (cap < 0 || config < 0 || manid < 0 || devid < 0)
return -ENODEV;
if ((cap & 0xff00) || (config & 0xf800))
if ((cap & 0xff00) || (config & 0xf820))
return -ENODEV;
if ((devid & TSE2004_DEVID_MASK) == TSE2004_DEVID &&
(cap & 0x00e7) != 0x00e7)
return -ENODEV;
for (i = 0; i < ARRAY_SIZE(jc42_chips); i++) {