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From: Lee Jones <lee.jones@linaro.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 Subject: [PATCH 0/4] clk: st: New clock domain Date: Mon, 26 Jan 2015 11:13:56 +0000 [thread overview] Message-ID: <1422270840-3039-1-git-send-email-lee.jones@linaro.org> (raw) ST hardware have a bunch of clocks which must not be turned off. If drivers a) fail to obtain a reference to any of these or b) give up a previously obtained reference during suspend, the common clk framework will attempt to turn them off and the hardware will subsequently die. The only way to recover from this failure is to restart. To avoid either of these two scenarios from catastrophically disabling the running system we have implemented a clock domain where clocks are consumed and references are taken, thus preventing them from being shut down by the framework. Lee Jones (4): ARM: sti: stih407-family: Supply defines for CLOCKGEN A0 ARM: sti: stih407-family: Provide Clock Domain information clk: st: Provide a clock domain clk: dt: st: Introduce clock domain documentation .../devicetree/bindings/clock/st/st,clk-domain.txt | 34 ++++++++++++ arch/arm/boot/dts/stih407-family.dtsi | 13 +++++ drivers/clk/st/Makefile | 2 +- drivers/clk/st/clk-domain.c | 63 ++++++++++++++++++++++ include/dt-bindings/clock/stih407-clks.h | 4 ++ 5 files changed, 115 insertions(+), 1 deletion(-) create mode 100644 Documentation/devicetree/bindings/clock/st/st,clk-domain.txt create mode 100644 drivers/clk/st/clk-domain.c -- 1.9.1
next reply other threads:[~2015-01-26 11:14 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-01-26 11:13 Lee Jones [this message] 2015-01-26 11:13 ` [PATCH 1/4] ARM: sti: stih407-family: Supply defines for CLOCKGEN A0 Lee Jones 2015-01-26 11:13 ` [PATCH 2/4] ARM: sti: stih407-family: Provide Clock Domain information Lee Jones 2015-01-26 11:13 ` [PATCH 3/4] clk: st: Provide a clock domain Lee Jones 2015-01-26 11:14 ` [PATCH 4/4] clk: dt: st: Introduce clock domain documentation Lee Jones 2015-01-28 1:19 ` Mike Turquette 2015-01-28 7:58 ` Lee Jones
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