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