On Tue, Apr 17, 2018 at 3:40 PM, Jae Hyun Yoo
<jae.hyun.yoo@xxxxxxxxxxxxxxx> wrote:
On 4/16/2018 4:51 PM, Jae Hyun Yoo wrote:
On 4/16/2018 4:22 PM, Jae Hyun Yoo wrote:
On 4/16/2018 11:14 AM, Rob Herring wrote:
On Tue, Apr 10, 2018 at 11:32:09AM -0700, Jae Hyun Yoo wrote:
This commit adds dt-bindings documents for PECI cputemp and dimmtemp
client
drivers.
[...]
+Example:
+ peci-bus@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ < more properties >
+
+ peci-dimmtemp@cpu0 {
unit-address is wrong.
Will fix it using the reg value.
It is a different bus from cputemp? Otherwise, you have conflicting
addresses. If that's the case, probably should make it clear by showing
different host adapters for each example.
It could be the same bus with cputemp. Also, client address sharing is
possible by PECI core if the functionality is different. I mean, cputemp and
dimmtemp targeting the same client is possible case like this.
peci-cputemp@30
peci-dimmtemp@30
Oh, I got your point. Probably, I should change these separate settings
into one like
peci-client@30 {
compatible = "intel,peci-client";
reg = <0x30>;
};
Then cputemp and dimmtemp drivers could refer the same compatible string.
Will rewrite it.
I've checked it again and realized that it should use function based node
name like:
peci-cputemp@30
peci-dimmtemp@30
If it use the same string like 'peci-client@30', the drivers cannot be
selectively enabled. The client address sharing way is well handled in PECI
core and this way would be better for the future implementations of other
PECI functional drivers such as crash dump driver and so on. So I'm going
change the unit-address only.
2 nodes at the same address is wrong (and soon dtc will warn you on
this). You have 2 potential options. The first is you need additional
address information in the DT if these are in fact 2 independent
devices. This could be something like a function number to use
something from PCI addressing. From what I found on PECI, it doesn't
seem to have anything like that. The 2nd option is you have a single
DT node which registers multiple hwmon devices. DT nodes and drivers
don't have to be 1-1. Don't design your DT nodes from how you want to
partition drivers in some OS.
Rob