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boundary="===============2303743152450615635==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============2303743152450615635== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="U2yG7SBZt5e06VSB" Content-Disposition: inline --U2yG7SBZt5e06VSB Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, May 15, 2024 at 02:28:51PM -0400, Frank Li wrote: > On Wed, May 15, 2024 at 05:04:48PM +0100, Conor Dooley wrote: > > On Wed, May 15, 2024 at 10:47:57AM +0800, Shengjiu Wang wrote: > > > On Wed, May 15, 2024 at 5:09=E2=80=AFAM Stephen Boyd wrote: > > > > > > > > Quoting Conor Dooley (2024-05-14 11:06:14) > > > > > On Tue, May 14, 2024 at 05:33:27PM +0800, Shengjiu Wang wrote: > > > > > > diff --git a/Documentation/devicetree/bindings/clock/imx8mp-aud= iomix.yaml b/Documentation/devicetree/bindings/clock/imx8mp-audiomix.yaml > > > > > > index 0a6dc1a6e122..a403ace4d11f 100644 > > > > > > --- a/Documentation/devicetree/bindings/clock/imx8mp-audiomix.y= aml > > > > > > +++ b/Documentation/devicetree/bindings/clock/imx8mp-audiomix.y= aml > > > > > > @@ -15,7 +15,10 @@ description: | > > > > > > > > > > > > properties: > > > > > > compatible: > > > > > > - const: fsl,imx8mp-audio-blk-ctrl > > > > > > + items: > > > > > > + - const: fsl,imx8mp-audio-blk-ctrl > > > > > > + - const: syscon > > > > > > + - const: simple-mfd > > > > > > > > > > > > reg: > > > > > > maxItems: 1 > > > > > > @@ -44,6 +47,11 @@ properties: > > > > > > ID in its "clocks" phandle cell. See include/dt-bindings= /clock/imx8mp-clock.h > > > > > > for the full list of i.MX8MP IMX8MP_CLK_AUDIOMIX_ clock = IDs. > > > > > > > > > > > > + reset-controller: > > > > > > + type: object > > > > > > + $ref: /schemas/reset/fsl,imx8mp-audiomix-reset.yaml# > > > > > > + description: The child reset devices of AudioMIX Block Con= trol. > > > > > > > > > > Why not just set #reset-cells =3D <1> in the existing node? IIRC = it was > > > > > already suggested to you to do that and use auxdev to set up the = reset > > > > > driver. > > > > > > > > Yes, do that. > > >=20 > > > Can I know why sub nodes can't be used? the relationship of parent and > > > child devices looks better with sub nodes. > >=20 > > That's pretty subjective. I don't think it looks better to have a clock > > node that is also a syscon with a reset child node as it is rather > > inconsistent. >=20 > I think it is multi function device syscon node. it should be like >=20 > mfd > { > clock > { > ... > } >=20 > reset > { > ... > } > } >=20 > clock and reset are difference device node with totally difference's > compatible string. Which is I suspect is gonna require a change to your clock driver, because the range in the existing clock nodes: audio_blk_ctrl: clock-controller@30e20000 { compatible =3D "fsl,imx8mp-audio-blk-ctrl"; reg =3D <0x30e20000 0x10000>; }; would then have to move to the mfd parent node, and your clock child would have a reg property that overlaps the reset region. You'd need to then define a new binding that splits the range in two - obviously doable, but significantly more work and more disruptive than using an auxdev. > > > A further question is can I use the reset-ti-syscon? which is a gener= ic reset > > > device for SoCs. with it I don't even need to write a new reset devi= ce driver. > > > it is more simple. > >=20 > > That is for a TI SoC. You're working on an imx. I don't think that you > > should be using that... >=20 > I think this statement violate the linux basic reuse prinicple. If the > code logic are the same why need duplicate it just because it is differen= ce > company. Of coures, if it is generic enough, it'd better to add a more > generic compatible string. That's true, but I suspect it only works because only through (ab)use of the ti,reset-bits property not because you're actually compatible with TI's reset hardware. Cheers, Conor. --U2yG7SBZt5e06VSB Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRh246EGq/8RLhDjO14tDGHoIJi0gUCZkY/JgAKCRB4tDGHoIJi 0q+6AQCaCdwhlVdXFZP7SLpIqoKwLTKzXYkUuCLzJaLFquKGEQD9Gnc2Qf41W7Rp SFmFc2JvIqe5qBGdEVUNt25VHvyqsgA= =A/oq -----END PGP SIGNATURE----- --U2yG7SBZt5e06VSB-- --===============2303743152450615635== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============2303743152450615635==--