From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753444AbbDGSoM (ORCPT ); Tue, 7 Apr 2015 14:44:12 -0400 Received: from mail-wg0-f47.google.com ([74.125.82.47]:35865 "EHLO mail-wg0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753403AbbDGSoK (ORCPT ); Tue, 7 Apr 2015 14:44:10 -0400 From: Lee Jones To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: lee.jones@linaro.org, kernel@stlinux.com, mturquette@linaro.org, sboyd@codeaurora.org, devicetree@vger.kernel.org, geert@linux-m68k.org Subject: [PATCH v6 2/4] ARM: sti: stih410-clocks: Identify critical clocks as always-on Date: Tue, 7 Apr 2015 19:43:57 +0100 Message-Id: <1428432239-4114-3-git-send-email-lee.jones@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1428432239-4114-1-git-send-email-lee.jones@linaro.org> References: <1428432239-4114-1-git-send-email-lee.jones@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 STiH410 development board unserviceable. Signed-off-by: Lee Jones --- arch/arm/boot/dts/stih410-clock.dtsi | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/arm/boot/dts/stih410-clock.dtsi b/arch/arm/boot/dts/stih410-clock.dtsi index 6b5803a..e1dd9b2 100644 --- a/arch/arm/boot/dts/stih410-clock.dtsi +++ b/arch/arm/boot/dts/stih410-clock.dtsi @@ -103,6 +103,7 @@ clocks = <&clk_sysin>; clock-output-names = "clk-s-a0-pll-ofd-0"; + clock-always-on = <0>; /* clk-s-a0-pll-ofd-0 */ }; clk_s_a0_flexgen: clk-s-a0-flexgen { @@ -115,6 +116,8 @@ clock-output-names = "clk-ic-lmi0", "clk-ic-lmi1"; + + clock-always-on = ; }; }; @@ -142,6 +145,7 @@ clocks = <&clk_sysin>; clock-output-names = "clk-s-c0-pll0-odf-0"; + clock-always-on = <0>; /* clk-s-c0-pll0-odf-0 */ }; clk_s_c0_pll1: clk-s-c0-pll1 { @@ -204,6 +208,12 @@ "clk-clust-hades", "clk-hwpe-hades", "clk-fc-hades"; + + clock-always-on = , + , + , + , + ; }; }; -- 1.9.1