From mboxrd@z Thu Jan 1 00:00:00 1970 From: Maxime Ripard Subject: Re: [PATCH 04/15] dt-bindings: rtc: sun6i-rtc: Export internal RC oscillator Date: Wed, 28 Nov 2018 11:32:19 +0100 Message-ID: <20181128103219.b625lttcgoluhgz5@flea> References: <20181128093013.24442-1-wens@csie.org> <20181128093013.24442-5-wens@csie.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="booz6elk33kflwpj" Return-path: Content-Disposition: inline In-Reply-To: <20181128093013.24442-5-wens@csie.org> Sender: linux-kernel-owner@vger.kernel.org To: Chen-Yu Tsai Cc: Alexandre Belloni , Alessandro Zummo , Michael Turquette , Stephen Boyd , Rob Herring , Mark Rutland , linux-arm-kernel@lists.infradead.org, linux-rtc@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com List-Id: devicetree@vger.kernel.org --booz6elk33kflwpj Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Nov 28, 2018 at 05:30:01PM +0800, Chen-Yu Tsai wrote: > Experiments showed that on at least the H3/H5/A64 the RTC's internal > oscillator also feeds the CPUS mux in the PRCM. >=20 > Export this clock through the device tree, instead of having to use > a dummy fixed-clock device node, for the PRCM to consume. This will > properly describe the relationship between the clocks. >=20 > Signed-off-by: Chen-Yu Tsai > --- > Documentation/devicetree/bindings/rtc/sun6i-rtc.txt | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) >=20 > diff --git a/Documentation/devicetree/bindings/rtc/sun6i-rtc.txt b/Docume= ntation/devicetree/bindings/rtc/sun6i-rtc.txt > index 78c4fb472eb7..1bd37faadecb 100644 > --- a/Documentation/devicetree/bindings/rtc/sun6i-rtc.txt > +++ b/Documentation/devicetree/bindings/rtc/sun6i-rtc.txt > @@ -24,7 +24,7 @@ Required properties: > =20 > Required properties for new device trees > - clocks : phandle to the 32kHz external oscillator > -- clock-output-names : names of the two clock outputs. See below. > +- clock-output-names : names of the three clock outputs. See below. > - #clock-cells : must be equal to 1. > =20 > The RTC provides the following clocks at the given indices: > @@ -32,6 +32,7 @@ The RTC provides the following clocks at the given indi= ces: > - 1: LOSC external output, known as X32KFOUT in the datasheet. > This clock is not available on the A31 and is deprecated for old > device trees still using the "allwinner,sun6i-a31-rtc" compatible. > +- 2: InternalOSC, or internal RC oscillator It seems to be required only for a few RTC though (H3, H5 and R40?) Maxime --=20 Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com --booz6elk33kflwpj Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCW/5uswAKCRDj7w1vZxhR xeZMAQDI/0l2TQDQE4latkDeQLbxx81a5mh0WiAiVsYp/WkiZwEAv4zE0ICSI7iK DBVFBjPBy0KOPmmpaH67xLoBPuxG1Q0= =f8qS -----END PGP SIGNATURE----- --booz6elk33kflwpj--