Shawn Guo <shawn.guo@xxxxxxxxxx> writes:
> On Sun, Apr 11, 2021 at 10:57:54AM +0300, Kalle Valo wrote:
>> Shawn Guo <shawn.guo@xxxxxxxxxx> writes:
>>
>> > Add optional brcm,ccode-map property to support translation from ISO3166
>> > country code to brcmfmac firmware country code and revision.
>> >
>> > Signed-off-by: Shawn Guo <shawn.guo@xxxxxxxxxx>
>> > ---
>> > .../devicetree/bindings/net/wireless/brcm,bcm43xx-fmac.txt | 7 +++++++
>> > 1 file changed, 7 insertions(+)
>> >
>> > diff --git a/Documentation/devicetree/bindings/net/wireless/brcm,bcm43xx-fmac.txt b/Documentation/devicetree/bindings/net/wireless/brcm,bcm43xx-fmac.txt
>> > index cffb2d6876e3..a65ac4384c04 100644
>> > --- a/Documentation/devicetree/bindings/net/wireless/brcm,bcm43xx-fmac.txt
>> > +++ b/Documentation/devicetree/bindings/net/wireless/brcm,bcm43xx-fmac.txt
>> > @@ -15,6 +15,12 @@ Optional properties:
>> > When not specified the device will use in-band SDIO interrupts.
>> > - interrupt-names : name of the out-of-band interrupt, which must be set
>> > to "host-wake".
>> > + - brcm,ccode-map : multiple strings for translating ISO3166 country code to
>> > + brcmfmac firmware country code and revision. Each string must be in
>> > + format "AA-BB-num" where:
>> > + AA is the ISO3166 country code which must be 2 characters.
>> > + BB is the firmware country code which must be 2 characters.
>> > + num is the revision number which must fit into signed integer.
>> >
>> > Example:
>> >
>> > @@ -34,5 +40,6 @@ mmc3: mmc@1c12000 {
>> > interrupt-parent = <&pio>;
>> > interrupts = <10 8>; /* PH10 / EINT10 */
>> > interrupt-names = "host-wake";
>> > + brcm,ccode-map = "JP-JP-78", "US-Q2-86";
>>
>> The commit log does not answer "Why?". Why this needs to be in device
>> tree and, for example, not hard coded in the driver?
>
> Thanks for the comment, Kalle. Actually, this is something I need some
> input from driver maintainers. I can see this country code mapping
> table is chipset specific, and can be hard coded in driver per chip id
> and revision. But on the other hand, it makes some sense to have this
> table in device tree, as the country code that need to be supported
> could be a device specific configuration.
Could be? Does such a use case exist at the moment or are just guessing
future needs?
>From what I have learned so far I think this kind of data should be in
the driver, but of course I might be missing something.
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