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hwmon: (it87) Add support to detect sensor type AMDTSI 

Add test for sensor type AMDTSI which is available on certain recent
chipsets.

Signed-off-by: Frank Crawford <frank@crawford.emu.id.au>
Link: https://lore.kernel.org/r/20230707123005.956415-4-frank@crawford.emu.id.au
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Frank Crawford 2023-07-07 22:29:52 +10:00 committed by Guenter Roeck
parent 2f60e59329
commit 6593eac899
1 changed files with 31 additions and 4 deletions
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35
drivers/hwmon/it87.c
View File

@ -221,6 +221,10 @@ static bool fix_pwm_polarity;
* Super-I/O configuration space.
*/
#define IT87_REG_VID 0x0a
/* Interface Selection register on other chips */
#define IT87_REG_IFSEL 0x0a
/*
* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
* for fan divisors. Later IT8712F revisions must use 16-bit tachometer
@ -1170,14 +1174,37 @@ static int get_temp_type(struct it87_data *data, int index)
* 0 = disabled
*/
u8 reg, extra;
int type = 0;
int ttype, type = 0;
reg = data->sensor; /* In case value is updated while used */
extra = data->extra;
/* Detect PECI vs. AMDTSI */
ttype = 6;
if ((has_temp_peci(data, index)) || data->type == it8721 ||
data->type == it8720) {
extra = it87_read_value(data, IT87_REG_IFSEL);
if ((extra & 0x70) == 0x40)
ttype = 5;
}
reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
/* Per chip special detection */
switch (data->type) {
case it8622:
if (!(reg & 0xc0) && index == 3)
type = ttype;
break;
default:
break;
}
if (type || index >= 3)
return type;
extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
if ((has_temp_peci(data, index) && (reg >> 6 == index + 1)) ||
(has_temp_old_peci(data, index) && (extra & 0x80)))
type = 6; /* Intel PECI */
type = ttype; /* Intel PECI or AMDTSI */
else if (reg & BIT(index))
type = 3; /* thermal diode */
else if (reg & BIT(index + 3))