From: Leo Yan <leo.yan-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> To: Wei Xu <xuwei5-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org>, Dan Zhao <dan.zhao-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org>, zhenwei.wang-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org, Haojian Zhuang <haojian.zhuang-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>, Bintian Wang <bintian.wang-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>, mturquette-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: Leo Yan <leo.yan-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> Subject: [PATCH 2/4] dt-bindings: clk: hisilicon: Document stub clock driver Date: Thu, 26 Mar 2015 19:13:37 +0800 [thread overview] Message-ID: <1427368419-22222-3-git-send-email-leo.yan@linaro.org> (raw) In-Reply-To: <1427368419-22222-1-git-send-email-leo.yan-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> Document the new compatible for stub clock driver which is used for CPU and DDR's dynamic frequency scaling. Signed-off-by: Leo Yan <leo.yan-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> --- .../devicetree/bindings/clock/hisi,stub-clock.txt | 38 ++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/hisi,stub-clock.txt diff --git a/Documentation/devicetree/bindings/clock/hisi,stub-clock.txt b/Documentation/devicetree/bindings/clock/hisi,stub-clock.txt new file mode 100644 index 0000000..07ef5a11 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/hisi,stub-clock.txt @@ -0,0 +1,38 @@ +* Clock bindings for Hisilicon Stub Clock Driver + +The Hisilicon stub clock will directly send dynamic frequency scaling request +to power controller, then the power controller will handle the request for +cpu and ddr's frequency change. + +Required properties: +- compatible: must be "hisilicon,hisi-clock-stub" +- hisilicon,clk-stub-sram: phandle to the syscon managing the SoC internal sram; + the driver need use the sram to pass parameters for frequency change. +- hisilicon,clk-stub-mc: phandle to the syscon managing the multi-cores' + communication; need set related register to trigger the dynamic frequency + scaling. +- #clock-cells: should be <1> + +Each clock is assigned an identifier and client nodes use this identifier +to specify the clock which they consume. + +All these identifier could be found in <dt-bindings/clock/hisi,stub-clock.h>. + +Example: + + sram: sram { + compatible = "hisilicon,sram", "syscon"; + reg = <0x0 0xFFF80000 0x0 0x12000>; + }; + + ipc_s: ipc_s { + compatible = "hisilicon,ipc-s", "syscon"; + reg = <0x0 0xF7510000 0x0 0x1000>; + }; + + clock_stub: clock_stub { + compatible = "hisilicon,hisi-clock-stub"; + hisilicon,clk-stub-sram = <&sram>; + hisilicon,clk-stub-mc = <&ipc_s>; + #clock-cells = <1>; + }; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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From: leo.yan@linaro.org (Leo Yan) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 2/4] dt-bindings: clk: hisilicon: Document stub clock driver Date: Thu, 26 Mar 2015 19:13:37 +0800 [thread overview] Message-ID: <1427368419-22222-3-git-send-email-leo.yan@linaro.org> (raw) In-Reply-To: <1427368419-22222-1-git-send-email-leo.yan@linaro.org> Document the new compatible for stub clock driver which is used for CPU and DDR's dynamic frequency scaling. Signed-off-by: Leo Yan <leo.yan@linaro.org> --- .../devicetree/bindings/clock/hisi,stub-clock.txt | 38 ++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/hisi,stub-clock.txt diff --git a/Documentation/devicetree/bindings/clock/hisi,stub-clock.txt b/Documentation/devicetree/bindings/clock/hisi,stub-clock.txt new file mode 100644 index 0000000..07ef5a11 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/hisi,stub-clock.txt @@ -0,0 +1,38 @@ +* Clock bindings for Hisilicon Stub Clock Driver + +The Hisilicon stub clock will directly send dynamic frequency scaling request +to power controller, then the power controller will handle the request for +cpu and ddr's frequency change. + +Required properties: +- compatible: must be "hisilicon,hisi-clock-stub" +- hisilicon,clk-stub-sram: phandle to the syscon managing the SoC internal sram; + the driver need use the sram to pass parameters for frequency change. +- hisilicon,clk-stub-mc: phandle to the syscon managing the multi-cores' + communication; need set related register to trigger the dynamic frequency + scaling. +- #clock-cells: should be <1> + +Each clock is assigned an identifier and client nodes use this identifier +to specify the clock which they consume. + +All these identifier could be found in <dt-bindings/clock/hisi,stub-clock.h>. + +Example: + + sram: sram { + compatible = "hisilicon,sram", "syscon"; + reg = <0x0 0xFFF80000 0x0 0x12000>; + }; + + ipc_s: ipc_s { + compatible = "hisilicon,ipc-s", "syscon"; + reg = <0x0 0xF7510000 0x0 0x1000>; + }; + + clock_stub: clock_stub { + compatible = "hisilicon,hisi-clock-stub"; + hisilicon,clk-stub-sram = <&sram>; + hisilicon,clk-stub-mc = <&ipc_s>; + #clock-cells = <1>; + }; -- 1.9.1
next prev parent reply other threads:[~2015-03-26 11:13 UTC|newest] Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-03-26 11:13 [PATCH 0/4] clk: hisilicon: support stub clock Leo Yan 2015-03-26 11:13 ` Leo Yan [not found] ` <1427368419-22222-1-git-send-email-leo.yan-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> 2015-03-26 11:13 ` [PATCH 1/4] clk: hisi: add API for allocation clk data struct Leo Yan 2015-03-26 11:13 ` Leo Yan [not found] ` <1427368419-22222-2-git-send-email-leo.yan-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> 2015-03-26 14:18 ` Russell King - ARM Linux 2015-03-26 14:18 ` Russell King - ARM Linux [not found] ` <20150326141834.GI8656-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org> 2015-03-27 1:48 ` Leo Yan 2015-03-27 1:48 ` Leo Yan 2015-03-26 11:13 ` Leo Yan [this message] 2015-03-26 11:13 ` [PATCH 2/4] dt-bindings: clk: hisilicon: Document stub clock driver Leo Yan 2015-03-26 11:13 ` [PATCH 3/4] clk: hisi: add stub clk driver Leo Yan 2015-03-26 11:13 ` Leo Yan [not found] ` <1427368419-22222-4-git-send-email-leo.yan-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> 2015-03-26 14:22 ` Russell King - ARM Linux 2015-03-26 14:22 ` Russell King - ARM Linux [not found] ` <20150326142226.GJ8656-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org> 2015-03-27 2:08 ` Leo Yan 2015-03-27 2:08 ` Leo Yan 2015-03-26 11:13 ` [PATCH 4/4] clk: hisi: add stub clock register function Leo Yan 2015-03-26 11:13 ` Leo Yan
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