linux-kernel - Re: [PATCH 5/7] arm64: allwinner: h6: Add RTC node

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Message-ID: <CAMty3ZAW5KndyJj81obK49MKczdbk4SoUncmiiE_OhH1g7qFUA@mail.gmail.com>
Date:   Thu, 1 Nov 2018 13:03:43 +0530
From:   Jagan Teki <jagan@...rulasolutions.com>
To:     Chen-Yu Tsai <wens@...e.org>
Cc:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Icenowy Zheng <icenowy@...c.io>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-sunxi@...glegroups.com, Jagan Teki <jagan@...nedev.com>
Subject: Re: [PATCH 5/7] arm64: allwinner: h6: Add RTC node

On Thu, Nov 1, 2018 at 8:25 AM Chen-Yu Tsai <wens@...e.org> wrote:
>
> On Thu, Nov 1, 2018 at 2:37 AM Jagan Teki <jagan@...rulasolutions.com> wrote:
> >
> > From: Jagan Teki <jagan@...nedev.com>
> >
> > RTC controller is similar to A31, so use the same compatible
> > for H6 and update interrupt numbers as per manual.
>
> No. Unfortunately they are not that compatible. The A31 does not have
> the RTC clock output. So everyone got it wrong. :( Plus the clock rate
> of the internal RC oscillator varies between SoCs. I'm working on a
> series of patches to correct this. Stay tuned.

4 bit, EXT_LOSC_EN of LOSC_CTRL_REG (0x00) seem available in H6. I can
see external clock working with WIFI for A31 compatible.