From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Szyprowski Subject: [PATCH v3 1/7 RESEND] PM / Domains: Add a note about power domain subdomains Date: Wed, 14 Jan 2015 15:12:15 +0100 Message-ID: <1421244735-10844-1-git-send-email-m.szyprowski@samsung.com> References: <1421243091-10778-2-git-send-email-m.szyprowski@samsung.com> Return-path: In-reply-to: <1421243091-10778-2-git-send-email-m.szyprowski@samsung.com> Sender: linux-samsung-soc-owner@vger.kernel.org To: linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org Cc: Marek Szyprowski , Kukjin Kim , Tobias Jakobi , Daniel Drake , Andrzej Hajda , Inki Dae , Tomasz Figa , kyungmin.park@samsung.com, Pankaj Dubey , Amit Daniel Kachhap , Geert Uytterhoeven , Ulf Hansson , devicetree@vger.kernel.org List-Id: devicetree@vger.kernel.org This patch adds a note on defining subdomains to generic PM domain binding documentation to let power domain providers use common approach for defining power domain hierarchy. Signed-off-by: Marek Szyprowski --- RESEND version: - fixed spelling mistakes, thanks go to Geert! --- .../devicetree/bindings/power/power_domain.txt | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/Documentation/devicetree/bindings/power/power_domain.txt b/Documentation/devicetree/bindings/power/power_domain.txt index 98c1667..eeea45b 100644 --- a/Documentation/devicetree/bindings/power/power_domain.txt +++ b/Documentation/devicetree/bindings/power/power_domain.txt @@ -19,6 +19,16 @@ Required properties: providing multiple PM domains (e.g. power controllers), but can be any value as specified by device tree binding documentation of particular provider. +Optional properties: + - power-domains : A phandle and PM domain specifier as defined by bindings of + the power controller specified by phandle. + Some power domains might be powered from another power domain (or have + other hardware specific dependencies). For representing such dependency + a standard PM domain consumer binding is used. When provided, all domains + created by the given provider should be subdomains of the domain + specified by this binding. More details about power domain specifier are + available in the next section. + Example: power: power-controller@12340000 { @@ -30,6 +40,25 @@ Example: The node above defines a power controller that is a PM domain provider and expects one cell as its phandle argument. +Example 2: + + parent: power-controller@12340000 { + compatible = "foo,power-controller"; + reg = <0x12340000 0x1000>; + #power-domain-cells = <1>; + }; + + child: power-controller@12340000 { + compatible = "foo,power-controller"; + reg = <0x12341000 0x1000>; + power-domains = <&parent 0>; + #power-domain-cells = <1>; + }; + +The nodes above define two power controllers: 'parent' and 'child'. +Domains created by the 'child' power controller are subdomains of '0' power +domain provided by the 'parent' power controller. + ==PM domain consumers== Required properties: -- 1.9.2 From mboxrd@z Thu Jan 1 00:00:00 1970 From: m.szyprowski@samsung.com (Marek Szyprowski) Date: Wed, 14 Jan 2015 15:12:15 +0100 Subject: [PATCH v3 1/7 RESEND] PM / Domains: Add a note about power domain subdomains In-Reply-To: <1421243091-10778-2-git-send-email-m.szyprowski@samsung.com> References: <1421243091-10778-2-git-send-email-m.szyprowski@samsung.com> Message-ID: <1421244735-10844-1-git-send-email-m.szyprowski@samsung.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This patch adds a note on defining subdomains to generic PM domain binding documentation to let power domain providers use common approach for defining power domain hierarchy. Signed-off-by: Marek Szyprowski --- RESEND version: - fixed spelling mistakes, thanks go to Geert! --- .../devicetree/bindings/power/power_domain.txt | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/Documentation/devicetree/bindings/power/power_domain.txt b/Documentation/devicetree/bindings/power/power_domain.txt index 98c1667..eeea45b 100644 --- a/Documentation/devicetree/bindings/power/power_domain.txt +++ b/Documentation/devicetree/bindings/power/power_domain.txt @@ -19,6 +19,16 @@ Required properties: providing multiple PM domains (e.g. power controllers), but can be any value as specified by device tree binding documentation of particular provider. +Optional properties: + - power-domains : A phandle and PM domain specifier as defined by bindings of + the power controller specified by phandle. + Some power domains might be powered from another power domain (or have + other hardware specific dependencies). For representing such dependency + a standard PM domain consumer binding is used. When provided, all domains + created by the given provider should be subdomains of the domain + specified by this binding. More details about power domain specifier are + available in the next section. + Example: power: power-controller at 12340000 { @@ -30,6 +40,25 @@ Example: The node above defines a power controller that is a PM domain provider and expects one cell as its phandle argument. +Example 2: + + parent: power-controller at 12340000 { + compatible = "foo,power-controller"; + reg = <0x12340000 0x1000>; + #power-domain-cells = <1>; + }; + + child: power-controller at 12340000 { + compatible = "foo,power-controller"; + reg = <0x12341000 0x1000>; + power-domains = <&parent 0>; + #power-domain-cells = <1>; + }; + +The nodes above define two power controllers: 'parent' and 'child'. +Domains created by the 'child' power controller are subdomains of '0' power +domain provided by the 'parent' power controller. + ==PM domain consumers== Required properties: -- 1.9.2