linux-kernel - Re: [PATCH 2/2] brcmfmac: support parse country code map from DT

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Message-ID: <20210413074509.GD15093@dragon>
Date:   Tue, 13 Apr 2021 15:45:09 +0800
From:   Shawn Guo <shawn.guo@...aro.org>
To:     Arend van Spriel <arend.vanspriel@...adcom.com>
Cc:     Kalle Valo <kvalo@...eaurora.org>,
        Rob Herring <robh+dt@...nel.org>,
        Rafał Miłecki <rafal@...ecki.pl>,
        Arend van Spriel <aspriel@...il.com>,
        Franky Lin <franky.lin@...adcom.com>,
        Hante Meuleman <hante.meuleman@...adcom.com>,
        Chi-hsien Lin <chi-hsien.lin@...ineon.com>,
        Wright Feng <wright.feng@...ineon.com>,
        Chung-hsien Hsu <chung-hsien.hsu@...ineon.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        brcm80211-dev-list.pdl@...adcom.com,
        SHA-cyfmac-dev-list@...ineon.com
Subject: Re: [PATCH 2/2] brcmfmac: support parse country code map from DT

On Mon, Apr 12, 2021 at 10:09:38AM +0200, Arend van Spriel wrote:
> On 08-04-2021 13:30, Shawn Guo wrote:
> > With any regulatory domain requests coming from either user space or
> > 802.11 IE (Information Element), the country is coded in ISO3166
> > standard.  It needs to be translated to firmware country code and
> > revision with the mapping info in settings->country_codes table.
> > Support populate country_codes table by parsing the mapping from DT.
> 
> comment below, but you may add...
> 
> Reviewed-by: Arend van Spriel <arend.vanspriel@...adcom.com>

Thanks for reviewing, Arend.

> > Signed-off-by: Shawn Guo <shawn.guo@...aro.org>
> > ---
> >   .../wireless/broadcom/brcm80211/brcmfmac/of.c | 53 +++++++++++++++++++
> >   1 file changed, 53 insertions(+)
> > 
> > diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
> > index a7554265f95f..ea5c7f434c2c 100644
> > --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
> > +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
> 
> [...]
> 
> > @@ -47,6 +96,10 @@ void brcmf_of_probe(struct device *dev, enum brcmf_bus_type bus_type,
> >   	    !of_device_is_compatible(np, "brcm,bcm4329-fmac"))
> >   		return;
> > +	ret = brcmf_of_get_country_codes(dev, settings);
> > +	if (ret)
> > +		dev_warn(dev, "failed to get OF country code map\n");
> 
> First of all I prefer to use brcmf_err and add ret value to the print
> message " (err=%d)\n".

Okay.

> Another thing is that this mapping is not only
> applicable for SDIO devices so you may consider doing this for other bus
> types as well which requires a bit more rework here.

Right. I will take care of it, if we can convince Kalle that having
this data in DT is not such a bad idea.

Shawn