Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932499AbcJUJIY (ORCPT ); Fri, 21 Oct 2016 05:08:24 -0400 Received: from mail-qk0-f174.google.com ([209.85.220.174]:35797 "EHLO mail-qk0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752372AbcJUJIT (ORCPT ); Fri, 21 Oct 2016 05:08:19 -0400 From: Peter Griffin To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@stlinux.com, patrice.chotard@st.com Cc: peter.griffin@linaro.org, lee.jones@linaro.org Subject: [PATCH] ARM: sti: stih407-clocks: Identify critical clocks Date: Fri, 21 Oct 2016 10:08:11 +0100 Message-Id: <1477040891-31611-1-git-send-email-peter.griffin@linaro.org> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1840 Lines: 65 Lots of platforms contain clocks which if turned off would prove fatal. The only way to recover is to restart the board(s). This driver takes references to clocks which are required to be always-on. The Common Clk Framework will then take references to them. This way they will not be turned off during the clk_disabled_unused() procedure. In this patch we are identifying clocks, which if gated would render the STiH407 development board unserviceable. Signed-off-by: Peter Griffin --- arch/arm/boot/dts/stih407-clock.dtsi | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/arm/boot/dts/stih407-clock.dtsi b/arch/arm/boot/dts/stih407-clock.dtsi index 13029c0..34c119a 100644 --- a/arch/arm/boot/dts/stih407-clock.dtsi +++ b/arch/arm/boot/dts/stih407-clock.dtsi @@ -101,6 +101,7 @@ clocks = <&clk_sysin>; clock-output-names = "clk-s-a0-pll-ofd-0"; + clock-critical = <0>; /* clk-s-a0-pll-ofd-0 */ }; clk_s_a0_flexgen: clk-s-a0-flexgen { @@ -112,6 +113,7 @@ <&clk_sysin>; clock-output-names = "clk-ic-lmi0"; + clock-critical = ; }; }; @@ -126,6 +128,7 @@ "clk-s-c0-fs0-ch1", "clk-s-c0-fs0-ch2", "clk-s-c0-fs0-ch3"; + clock-critical = <0>; /* clk-s-c0-fs0-ch0 */ }; clk_s_c0: clockgen-c@09103000 { @@ -139,6 +142,7 @@ clocks = <&clk_sysin>; clock-output-names = "clk-s-c0-pll0-odf-0"; + clock-critical = <0>; /* clk-s-c0-pll0-odf-0 */ }; clk_s_c0_pll1: clk-s-c0-pll1 { @@ -194,6 +198,12 @@ "clk-main-disp", "clk-aux-disp", "clk-compo-dvp"; + clock-critical = , + , + , + , + , + ; }; }; -- 1.9.1