linux-kernel - Re: [PATCH v8 06/11] rtc: sun6i: Add support for RTCs without external LOSCs

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Message-ID: <3166830.bveH9cQ5e6@kista>
Date:   Sun, 25 Jul 2021 08:18:23 +0200
From:   Jernej Škrabec <jernej.skrabec@...il.com>
To:     Maxime Ripard <mripard@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
        Andre Przywara <andre.przywara@....com>
Cc:     Rob Herring <robh@...nel.org>, Icenowy Zheng <icenowy@...c.io>,
        Samuel Holland <samuel@...lland.org>,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...glegroups.com,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Ondrej Jirman <megous@...ous.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        linux-rtc@...r.kernel.org
Subject: Re: [PATCH v8 06/11] rtc: sun6i: Add support for RTCs without external LOSCs

Hi Andre!

Dne petek, 23. julij 2021 ob 17:38:33 CEST je Andre Przywara napisal(a):
> Some newer Allwinner RTCs (for instance the one in the H616 SoC) lack
> a pin for an external 32768 Hz oscillator. As a consequence, this LOSC
> can't be selected as the RTC clock source, and we must rely on the
> internal RC oscillator.
> To allow additions of clocks to the RTC node, add a feature bit to ignore
> any provided clocks for now (the current code would think this is the
> external LOSC). Later DTs and code can then for instance add the PLL
> based clock input, and older kernel won't get confused.
> 
> Signed-off-by: Andre Przywara <andre.przywara@....com>
> ---
>  drivers/rtc/rtc-sun6i.c | 16 +++++++++++-----
>  1 file changed, 11 insertions(+), 5 deletions(-)
> 

Acked-by: Jernej Skrabec <jernej.skrabec@...il.com>

Best regards,
Jernej