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SubjectRe: [ibm-acpi-devel] [PATCH] Add Second Fan Support for Thinkpad P50
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Yes, I tested this successfully on my P50 (see below). Thanks for Ack'ing. 


ak@REDDOT:~$ sensors
thinkpad-isa-0000
Adapter: ISA adapter
fan1: 3778 RPM
fan2: 3771 RPM
...



On 04/02/2018 01:22 PM, Andy Shevchenko wrote:
> I would rather name it ..._QB() instead
>
> Better of course to use three letters, though let's leave this when we
> really have a need.
Agreed; ideally we'd use a bitmask.


On 04/02/2018 12:08 PM, Henrique de Moraes Holschuh wrote:
> On Mon, 02 Apr 2018, Alexander Kappner wrote:
>> The Thinkpad P50 has 2 fans. Add the 2FAN quirk so the tpacpi driver
>> properly reports both fan speeds.
>> Because the P50 doesn't report the version of its EC controller, we need to
>> identify it by BIOS version (N1).
>>
>> Signed-off-by: Alexander Kappner <agk@godking.net>
>
> I assume you tested this on real hardware? If so:
>
> Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
>
>> ---
>> drivers/platform/x86/thinkpad_acpi.c | 8 ++++++++
>> 1 file changed, 8 insertions(+)
>>
>> diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
>> index d5eaf3b1..ebdc300 100644
>> --- a/drivers/platform/x86/thinkpad_acpi.c
>> +++ b/drivers/platform/x86/thinkpad_acpi.c
>> @@ -8699,16 +8699,24 @@ static const struct attribute_group fan_attr_group = {
>> .ec = TPID(__id1, __id2), \
>> .quirks = __quirks }
>>
>> +#define TPACPI_FAN_QL_BIOS(__id1, __id2, __quirks) \
>> + { .vendor = PCI_VENDOR_ID_LENOVO, \
>> + .bios = TPID(__id1, __id2), \
>> + .ec = TPACPI_MATCH_ANY, \
>> + .quirks = __quirks }
>> +
>> static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
>> TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
>> TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
>> TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
>> TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
>> TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
>> + TPACPI_FAN_QL_BIOS('N', '1', TPACPI_FAN_2FAN) // Thinkpad P50 has 2 fans
>> };
>>
>> #undef TPACPI_FAN_QL
>> #undef TPACPI_FAN_QI
>> +#undef TPACPI_FAN_QL_BIOS
>>
>> static int __init fan_init(struct ibm_init_struct *iibm)
>> {
>

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