Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755245AbcDFNLl (ORCPT ); Wed, 6 Apr 2016 09:11:41 -0400 Received: from mail-ig0-f194.google.com ([209.85.213.194]:34338 "EHLO mail-ig0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754092AbcDFNLj (ORCPT ); Wed, 6 Apr 2016 09:11:39 -0400 MIME-Version: 1.0 In-Reply-To: <1459947173-6664-1-git-send-email-sjoerd.simons@collabora.co.uk> References: <1459947173-6664-1-git-send-email-sjoerd.simons@collabora.co.uk> Date: Wed, 6 Apr 2016 15:11:37 +0200 X-Google-Sender-Auth: iMhh1vOKvN2s8X1D7w4BlRVoOMQ Message-ID: Subject: Re: [PATCH] ARM: dts: r8a7791: Don't disable referenced optional clocks From: Geert Uytterhoeven To: Sjoerd Simons Cc: Simon Horman , linux-renesas-soc@vger.kernel.org, "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , Michael Turquette , Stephen Boyd , linux-clk Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3072 Lines: 90 CC Mike, Stephen, linux-clk (this time with the new Mike) On Wed, Apr 6, 2016 at 2:52 PM, Sjoerd Simons wrote: > clk_get on a disabled clock node will return EPROBE_DEFER, which can > cause drivers to be deferred forever if such clocks are referenced in > their clocks property. Is this a side effect of commit 3e5dd6f6e690048d ("clk: Ignore disabled DT clock providers")? > Update the various disabled external clock nodes to default to a > frequency of 0, but don't disable them to prevent this. > > Signed-off-by: Sjoerd Simons > > --- > > arch/arm/boot/dts/r8a7791-koelsch.dts | 1 + > arch/arm/boot/dts/r8a7791-porter.dts | 1 + > arch/arm/boot/dts/r8a7791.dtsi | 5 +---- > 3 files changed, 3 insertions(+), 4 deletions(-) > > diff --git a/arch/arm/boot/dts/r8a7791-koelsch.dts b/arch/arm/boot/dts/r8a7791-koelsch.dts > index 1adf877..da59c28 100644 > --- a/arch/arm/boot/dts/r8a7791-koelsch.dts > +++ b/arch/arm/boot/dts/r8a7791-koelsch.dts > @@ -660,6 +660,7 @@ > }; > > &pcie_bus_clk { > + clock-frequency = <100000000>; > status = "okay"; > }; > > diff --git a/arch/arm/boot/dts/r8a7791-porter.dts b/arch/arm/boot/dts/r8a7791-porter.dts > index 9554d13..19b257e 100644 > --- a/arch/arm/boot/dts/r8a7791-porter.dts > +++ b/arch/arm/boot/dts/r8a7791-porter.dts > @@ -413,6 +413,7 @@ > }; > > &pcie_bus_clk { > + clock-frequency = <100000000>; > status = "okay"; > }; > > diff --git a/arch/arm/boot/dts/r8a7791.dtsi b/arch/arm/boot/dts/r8a7791.dtsi > index 8693888..676df63 100644 > --- a/arch/arm/boot/dts/r8a7791.dtsi > +++ b/arch/arm/boot/dts/r8a7791.dtsi > @@ -1104,8 +1104,7 @@ > pcie_bus_clk: pcie_bus { > compatible = "fixed-clock"; > #clock-cells = <0>; > - clock-frequency = <100000000>; > - status = "disabled"; > + clock-frequency = <0>; > }; > > /* External SCIF clock */ > @@ -1114,7 +1113,6 @@ > #clock-cells = <0>; > /* This value must be overridden by the board. */ > clock-frequency = <0>; > - status = "disabled"; > }; > > /* External USB clock - can be overridden by the board */ > @@ -1130,7 +1128,6 @@ > #clock-cells = <0>; > /* This value must be overridden by the board. */ > clock-frequency = <0>; > - status = "disabled"; > }; > > /* Special CPG clocks */ > -- > 2.8.0.rc3 Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds