Allwinner A64: Issue on external rtc clock to wifi chip

Maxime Ripard
2018-05-14T07:57:27Z

Hi,

On Mon, May 14, 2018 at 12:37:49PM +0530, Jagan Teki wrote:
> Hi Maxime and All,
>
> We are trying to bring-up AP6330 Wifi chip for A64 board. We noticed
> to have an external rtc clock has driven from wifi chip.
>
> So the devicetree is configured according to this as below.
>
> / {
> wifi_pwrseq: wifi-pwrseq {
> compatible = "mmc-pwrseq-simple";
> clocks = <&rtc 1>;
> clock-names = "ext_clock";
> reset-gpios = <&r_pio 0 2 GPIO_ACTIVE_LOW>; /* PL2 */
> post-power-on-delay-ms = <400>;
> };
> };
>
> &rtc {
> clock-output-names = "rtc-osc32k", "rtc-osc32k-out";
> clocks = <&osc32k>;
> #clock-cells = <1>;
> };
>
> &mmc1 {
> pinctrl-names = "default";
> pinctrl-0 = <&mmc1_pins>;
> vmmc-supply = <&reg_dcdc1>;
> vqmmc-supply = <&reg_eldo1>;
> mmc-pwrseq = <&wifi_pwrseq>;
> bus-width = <4>;
> non-removable;
> status = "okay";
>
> brcmf: wifi at 1 {
> reg = <1>;
> compatible = "brcm,bcm4329-fmac";
> interrupt-parent = <&r_pio>;
> interrupts = <0 3 IRQ_TYPE_LEVEL_LOW>; /* WL-WAKE-AP: PL3 */
> interrupt-names = "host-wake";
> };
> };
>
> And observed rtc-osc32k-out clock is never enabled[1] and the value of
> LOSC_OUT_GATING is 0x0 which eventually not enabling
> LOSC_OUT_GATING_EN
>
> Pls. let us know if we miss anything here?
>
> [1] https://paste.ubuntu.com/p/X2By4q8kD2/

Could you paste your config and the logs from a boot to?

Thanks!
Maxime

--
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com
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