[PATCH 6.11 059/261] [PATCH} hwmon: (jc42) Properly detect TSE2004-compliant devices again

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

6.11-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jean Delvare <jdelvare@suse.de>

[ Upstream commit eabb03810194b75417b09cff8a526d26939736ac ]

Commit b3e992f69c23 ("hwmon: (jc42)  Strengthen detect function")
attempted to make the detect function more robust for
TSE2004-compliant devices by checking capability bits which, according
to the JEDEC 21-C specification, should always be set. Unfortunately,
not all real-world implementations fully adhere to this specification,
so this change caused a regression.

Stop testing bit 7 (EVSD) of the Capabilities register, as it was
found to be 0 on one real-world device.

Also stop testing bits 0 (EVENT) and 2 (RANGE) as vendor datasheets
(Renesas TSE2004GB2B0, ST STTS2004) suggest that they may not always
be set either.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Message-ID: <20241014141204.026f4641@endymion.delvare>
Fixes: b3e992f69c23 ("hwmon: (jc42)  Strengthen detect function")
Message-ID: <20241014220426.0c8f4d9c@endymion.delvare>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/hwmon/jc42.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/jc42.c b/drivers/hwmon/jc42.c
index a260cff750a58..c459dce496a6e 100644
--- a/drivers/hwmon/jc42.c
+++ b/drivers/hwmon/jc42.c
@@ -417,7 +417,7 @@ static int jc42_detect(struct i2c_client *client, struct i2c_board_info *info)
 		return -ENODEV;
 
 	if ((devid & TSE2004_DEVID_MASK) == TSE2004_DEVID &&
-	    (cap & 0x00e7) != 0x00e7)
+	    (cap & 0x0062) != 0x0062)
 		return -ENODEV;
 
 	for (i = 0; i < ARRAY_SIZE(jc42_chips); i++) {
-- 
2.43.0