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hwmon: (spd5118) Name chips taking the specification literally

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The Renesas/IDT SPD5118 Hub Controller is known to take the specification
literally and does not permit access to volatile registers except for the
page register if the selected page is non-zero. Explicitly name the chip
to ensure that the information does not get lost.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2024-11-17 07:55:32 -08:00
parent 4cf1aab45c
commit ae28532aff
1 changed files with 2 additions and 1 deletions
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3
drivers/hwmon/spd5118.c
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@ -621,7 +621,8 @@ static int spd5118_i2c_init(struct i2c_client *client)
* If the device type registers return 0, it is possible that the chip
* has a non-zero page selected and takes the specification literally,
* i.e. disables access to volatile registers besides the page register
* if the page is not 0. Try to identify such chips.
* if the page is not 0. The Renesas/ITD SPD5118 Hub Controller is known
* to show this behavior. Try to identify such chips.
*/
if (!regval) {
/* Vendor ID registers must also be 0 */