* sysfs entries not created for temperature in adm1278
@ 2020-05-06 19:40 Manikandan E
2020-05-07 0:06 ` Milton Miller II
0 siblings, 1 reply; 2+ messages in thread
From: Manikandan E @ 2020-05-06 19:40 UTC (permalink / raw
To: openbmc@lists.ozlabs.org
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Hi,
The adm1278 hwmon sysfs entries not created for temperature.
root@yosemitev2:~# ls -l /sys/class/hwmon/hwmon4/
curr1_highest curr_samples in1_max_alarm in2_label in_samples power1_label
curr1_input device/ in1_min in2_max name power1_max
curr1_label in1_highest in1_min_alarm in2_max_alarm of_node/ power1_reset_history
curr1_max in1_input in1_reset_history in2_min power1_alarm power_samples
curr1_max_alarm in1_label in2_highest in2_min_alarm power1_input subsystem/
curr1_reset_history in1_max in2_input in2_reset_history power1_input_highest uevent
Thanks
Mani.E
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: sysfs entries not created for temperature in adm1278
2020-05-06 19:40 sysfs entries not created for temperature in adm1278 Manikandan E
@ 2020-05-07 0:06 ` Milton Miller II
0 siblings, 0 replies; 2+ messages in thread
From: Milton Miller II @ 2020-05-07 0:06 UTC (permalink / raw
To: Manikandan E; +Cc: openbmc@lists.ozlabs.org
On May 6, 2020 around 6:02PM in some timezone, Manikandan E wrote:
> Hi,
>
>
> The adm1278 hwmon sysfs entries not created for temperature.
> root@yosemitev2:~# ls -l /sys/class/hwmon/hwmon4/
>
>curr1_highest curr_samples in1_max_alarm
>in2_label in_samples power1_label
>
>curr1_input device/ in1_min
>in2_max name power1_max
>
>curr1_label in1_highest in1_min_alarm
>in2_max_alarm of_node/ power1_reset_history
>
>curr1_max in1_input in1_reset_history
>in2_min power1_alarm power_samples
>
>curr1_max_alarm in1_label in2_highest
>in2_min_alarm power1_input subsystem/
>
>curr1_reset_history in1_max in2_input
>in2_reset_history power1_input_highest uevent
>
A quick look at the upstream driver says that it reads the
power management config register at 0xd4 and enables what
is there, but (1) it doesn't account that the register is
16 bits on 1278 and (2) although the register is rw according
to the datasheet the driver doesn't appear to have proviisons
to configure it.
I'd suggest (1) unbindig the driver, writing the register,
and then try binding the driver again (or warm reboot) to see
if this works around the issue, and
(2) raise the issue with the upstream on the linux-hwmon
mailing list (or read the wiki in MAINTAINTERS). The
driver is adm1275.
I'd suggest a binding that allows the config register to be
specified in the device tree but I am not familiar with the
hwmon comunity or practice for similar.
Hope this helps
milton
Speaking only for myself.
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2020-05-06 19:40 sysfs entries not created for temperature in adm1278 Manikandan E
2020-05-07 0:06 ` Milton Miller II
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