From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lee Jones Subject: [PATCH v3 2/4] ARM: sti: stih407-family: Add platform interconnects to always-on clk domain Date: Tue, 24 Feb 2015 17:33:40 +0000 Message-ID: <1424799222-9301-3-git-send-email-lee.jones@linaro.org> References: <1424799222-9301-1-git-send-email-lee.jones@linaro.org> Return-path: In-Reply-To: <1424799222-9301-1-git-send-email-lee.jones@linaro.org> Sender: linux-kernel-owner@vger.kernel.org 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 List-Id: devicetree@vger.kernel.org Certain clocks should not be turned of by clk_disable_unused. Until now we have been using the kernel command-line of the same name to prevent common clk from turning off all clocks without a reference, as this would ensure hardware lockup. This patch lists each platform interconnect which needs to stay on to prevent the aforementioned issue from arising. Signed-off-by: Lee Jones --- arch/arm/boot/dts/stih407-family.dtsi | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/arm/boot/dts/stih407-family.dtsi b/arch/arm/boot/dts/stih407-family.dtsi index c06a546..35c74c6 100644 --- a/arch/arm/boot/dts/stih407-family.dtsi +++ b/arch/arm/boot/dts/stih407-family.dtsi @@ -34,6 +34,21 @@ reg = <0x08761000 0x1000>, <0x08760100 0x100>; }; + /* + * ICNs are not visible/controllable in Linux, but references to their + * clocks must be obtained and retained or the platform will become + * irrecoverably unresponsive. + */ + icn { + compatible = "clk-always-on"; + clocks = <&clk_s_c0_flexgen CLK_ICN_SBC>, + <&clk_s_c0_flexgen CLK_ICN_CPU>, + <&clk_s_c0_flexgen CLK_ICN_LMI>, + <&clk_s_c0_flexgen CLK_TX_ICN_DMU>, + <&clk_s_a0_flexgen CLK_IC_LMI0>, + <&clk_s_c0_flexgen CLK_EXT2F_A9>; + }; + scu@08760000 { compatible = "arm,cortex-a9-scu"; reg = <0x08760000 0x1000>; -- 1.9.1