From: Lee Jones <lee.jones@linaro.org> To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: kernel@stlinux.com, maxime.coquelin@st.com, patrice.chotard@st.com, mturquette@baylibre.com, sboyd@codeaurora.org, broonie@kernel.org, linux-clk@vger.kernel.org, linux-spi@vger.kernel.org, Lee Jones <lee.jones@linaro.org> Subject: [PATCH 5/6] ARM: sti: stih410-clocks: Identify critical clocks Date: Tue, 7 Jun 2016 12:19:29 +0100 [thread overview] Message-ID: <20160607111930.10375-6-lee.jones@linaro.org> (raw) In-Reply-To: <20160607111930.10375-1-lee.jones@linaro.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 <lee.jones@linaro.org> --- arch/arm/boot/dts/stih410-clock.dtsi | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm/boot/dts/stih410-clock.dtsi b/arch/arm/boot/dts/stih410-clock.dtsi index d1f2aca..fd50496 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-critical = <0>; /* clk-s-a0-pll-ofd-0 */ }; clk_s_a0_flexgen: clk-s-a0-flexgen { @@ -115,6 +116,7 @@ clock-output-names = "clk-ic-lmi0", "clk-ic-lmi1"; + clock-critical = <CLK_IC_LMI0>; }; }; @@ -129,6 +131,7 @@ "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 { @@ -142,6 +145,7 @@ 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 { @@ -204,6 +208,11 @@ "clk-clust-hades", "clk-hwpe-hades", "clk-fc-hades"; + clock-critical = <CLK_ICN_CPU>, + <CLK_TX_ICN_DMU>, + <CLK_EXT2F_A9>, + <CLK_ICN_LMI>, + <CLK_ICN_SBC>; }; }; -- 2.8.3
WARNING: multiple messages have this Message-ID (diff)
From: lee.jones@linaro.org (Lee Jones) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 5/6] ARM: sti: stih410-clocks: Identify critical clocks Date: Tue, 7 Jun 2016 12:19:29 +0100 [thread overview] Message-ID: <20160607111930.10375-6-lee.jones@linaro.org> (raw) In-Reply-To: <20160607111930.10375-1-lee.jones@linaro.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 <lee.jones@linaro.org> --- arch/arm/boot/dts/stih410-clock.dtsi | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm/boot/dts/stih410-clock.dtsi b/arch/arm/boot/dts/stih410-clock.dtsi index d1f2aca..fd50496 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-critical = <0>; /* clk-s-a0-pll-ofd-0 */ }; clk_s_a0_flexgen: clk-s-a0-flexgen { @@ -115,6 +116,7 @@ clock-output-names = "clk-ic-lmi0", "clk-ic-lmi1"; + clock-critical = <CLK_IC_LMI0>; }; }; @@ -129,6 +131,7 @@ "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 at 09103000 { @@ -142,6 +145,7 @@ 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 { @@ -204,6 +208,11 @@ "clk-clust-hades", "clk-hwpe-hades", "clk-fc-hades"; + clock-critical = <CLK_ICN_CPU>, + <CLK_TX_ICN_DMU>, + <CLK_EXT2F_A9>, + <CLK_ICN_LMI>, + <CLK_ICN_SBC>; }; }; -- 2.8.3
next prev parent reply other threads:[~2016-06-07 11:21 UTC|newest] Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-06-07 11:19 [PATCH 0/6] clk: sti: Add support for critical clocks Lee Jones 2016-06-07 11:19 ` Lee Jones 2016-06-07 11:19 ` [PATCH 1/6] clk: st: clk-flexgen: Detect " Lee Jones 2016-06-07 11:19 ` Lee Jones 2016-06-07 11:19 ` Lee Jones 2016-06-07 11:19 ` [PATCH 2/6] clk: st: clkgen-fsyn: " Lee Jones 2016-06-07 11:19 ` Lee Jones 2016-06-07 11:19 ` Lee Jones 2016-06-07 11:19 ` [PATCH 3/6] clk: st: clkgen-pll: " Lee Jones 2016-06-07 11:19 ` Lee Jones 2016-06-07 11:19 ` [PATCH 4/6] ARM: sti: stih407-family: Supply defines for CLOCKGEN A0 Lee Jones 2016-06-07 11:19 ` Lee Jones 2016-06-07 11:19 ` Lee Jones [this message] 2016-06-07 11:19 ` [PATCH 5/6] ARM: sti: stih410-clocks: Identify critical clocks Lee Jones 2016-06-07 11:19 ` [PATCH 6/6] spi: st-ssc4: Remove 'no clocking' hack Lee Jones 2016-06-07 11:19 ` Lee Jones 2016-06-07 15:17 ` Mark Brown 2016-06-07 15:17 ` Mark Brown 2016-06-30 20:52 ` Lee Jones 2016-06-30 20:52 ` Lee Jones 2016-06-30 20:52 ` Lee Jones 2016-07-01 9:59 ` Mark Brown 2016-07-01 9:59 ` Mark Brown 2016-06-30 19:23 ` [PATCH 0/6] clk: sti: Add support for critical clocks Stephen Boyd 2016-06-30 19:23 ` Stephen Boyd 2016-06-30 20:54 ` Lee Jones 2016-06-30 20:54 ` Lee Jones 2016-06-30 20:54 ` Lee Jones
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