On Tue, Apr 23, 2019 at 02:26:04PM -0300, Pablo Greco wrote: > The AP6212 is based on the Broadcom BCM43430 or BCM43438. The WiFi side > identifies as BCM43430, while the Bluetooth side identifies as BCM43438. > > The Bluetooth side is connected to UART3 in a 4 wire configuration. Same > as the WiFi side, due to being the same chip and package, DLDO1 and > DLDO2 regulator outputs from the PMIC provide overall power via VBAT and > I/O power via VDDIO. The CLK_OUT_A clock output from the SoC provides > the LPO low power clock at 32.768 kHz. > > This patch enables Bluetooth on this board, and also adds the missing > LPO clock on the WiFi side. There is also a PCM connection for > Bluetooth, but this is not covered here. > > The LPO clock is fed from CLK_OUT_A, which needs to be muxed on pin > PI12. This can be represented in multiple ways. This patch puts the > pinctrl property in the pin controller node. This is due to limitations > in Linux, where pinmux settings, even the same one, can not be shared > by multiple devices. Thus we cannot put it in both the WiFi and > Bluetooth device nodes. Putting it the CCU node is another option, but > Linux's CCU driver does not handle pinctrl. Also the pin controller is > guaranteed to be initialized after the CCU, when clocks are available. > And any other devices that use muxed pins are guaranteed to be > initialized after the pin controller. Thus having the CLK_OUT_A pinmux > reference be in the pin controller node is a good choice without having > to deal with implementation issues. > > Signed-off-by: Pablo Greco <[email protected]> > --- > arch/arm/boot/dts/sun8i-v40-bananapi-m2-berry.dts | 22 ++++++++++++++++++++++ > 1 file changed, 22 insertions(+) > > diff --git a/arch/arm/boot/dts/sun8i-v40-bananapi-m2-berry.dts > b/arch/arm/boot/dts/sun8i-v40-bananapi-m2-berry.dts > index c87f2c0..15c22b0 100644 > --- a/arch/arm/boot/dts/sun8i-v40-bananapi-m2-berry.dts > +++ b/arch/arm/boot/dts/sun8i-v40-bananapi-m2-berry.dts > @@ -96,6 +96,8 @@ > wifi_pwrseq: wifi_pwrseq { > compatible = "mmc-pwrseq-simple"; > reset-gpios = <&pio 6 10 GPIO_ACTIVE_LOW>; /* PG10 WIFI_EN */ > + clocks = <&ccu CLK_OUTA>; > + clock-names = "ext_clock";
So if you don't have that patch (that enables bluetooth) the wifi
doesn't work (even though the previous patch is supposed to enable it)
?
> };
> };
>
> @@ -173,6 +175,7 @@
>
> &pio {
> pinctrl-names = "default";
> + pinctrl-0 = <&clk_out_a_pin>;
This one should bein the previous one as well
Maxime
--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
--
You received this message because you are subscribed to the Google Groups
"linux-sunxi" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
signature.asc
Description: PGP signature
