Em Wed, 26 Aug 2020 13:41:49 +0100
Robin Murphy <robin.murphy@xxxxxxx> escreveu:
> On 2020-08-26 06:57, Mauro Carvalho Chehab wrote:
> > The dwmmc2 is used on Hikey 970 for WiFi support. The
> > hi3670.dtsi adds it, but with status="disabled".
> >
> > For WiFi to work,it needs to be enabled. While here, add
> > the missing properties:
> >
> > #address-cells = <0x1>;
> > #size-cells = <0x0>;
> >
> > and add
> > ti,non-removable
> >
> > To DT properties, as the WiFi support is on a non-removable slot.
> >
> > Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
> > ---
> > arch/arm64/boot/dts/hisilicon/hi3670-hikey970.dts | 5 +++++
> > 1 file changed, 5 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/hisilicon/hi3670-hikey970.dts b/arch/arm64/boot/dts/hisilicon/hi3670-hikey970.dts
> > index f218acceec0b..a2b0d2a1d09d 100644
> > --- a/arch/arm64/boot/dts/hisilicon/hi3670-hikey970.dts
> > +++ b/arch/arm64/boot/dts/hisilicon/hi3670-hikey970.dts
> > @@ -402,6 +402,7 @@ &sd_clk_cfg_func
> >
> > &dwmmc2 { /* WIFI */
> > bus-width = <0x4>;
> > + ti,non-removable;
>
> Why? This property is only defined for OMAP HSMMC controllers, which
> this isn't, and you've already got the proper generic property right
> there below. Plus in terms of Linux it will have zero effect, since it's
> only parsed by the omap_hsmmc driver anyway.
>
> > non-removable;
> > broken-cd;
> > cap-power-off-card;
> > @@ -409,8 +410,12 @@ &dwmmc2 { /* WIFI */
> > pinctrl-0 = <&sdio_pmx_func
> > &sdio_clk_cfg_func
> > &sdio_cfg_func>;
> > + status = "ok";
>
> Have you noticed the context 6 lines below?
>
> > +
> > /* WL_EN */
> > vmmc-supply = <&wlan_en>;
> > + #address-cells = <0x1>;
> > + #size-cells = <0x0>;
>
> These are already present in hi3670.dtsi. AFAICS Wifi support was merged
> 18 months ago :/
My mistake! It seems that I need more caffeine today.
I wrote this patch for an older Kernel version (4.19).
I ended porting it to 5.8, with also required another patch,
due to a regression between Kernel 5.7 and 5.8:
https://lore.kernel.org/lkml/f0a2cb7ea606f1a284d4c23cbf983da2954ce9b6.1598420968.git.mchehab+huawei@xxxxxxxxxx/
Thanks,
Mauro
