From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Szyprowski Subject: [PATCH v3 2/7] ARM: Exynos: add support for sub-power domains Date: Wed, 14 Jan 2015 14:44:46 +0100 Message-ID: <1421243091-10778-3-git-send-email-m.szyprowski@samsung.com> References: <1421243091-10778-1-git-send-email-m.szyprowski@samsung.com> Return-path: Received: from mailout4.w1.samsung.com ([210.118.77.14]:16641 "EHLO mailout4.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753041AbbANNpE (ORCPT ); Wed, 14 Jan 2015 08:45:04 -0500 Received: from eucpsbgm2.samsung.com (unknown [203.254.199.245]) by mailout4.w1.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0NI600K0N6DP1040@mailout4.w1.samsung.com> for linux-samsung-soc@vger.kernel.org; Wed, 14 Jan 2015 13:49:01 +0000 (GMT) In-reply-to: <1421243091-10778-1-git-send-email-m.szyprowski@samsung.com> Sender: linux-samsung-soc-owner@vger.kernel.org List-Id: linux-samsung-soc@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 This patch adds support for making one power domain a sub-domain of other domain. This is useful for modeling power dependences for devices like TV Mixer or Camera ISP, which needs to have more than one power domain enabled to be operational. Based on previous work by Amit Daniel Kachhap . Signed-off-by: Marek Szyprowski --- .../bindings/arm/exynos/power_domain.txt | 2 ++ arch/arm/mach-exynos/pm_domains.c | 28 ++++++++++++++++++++++ 2 files changed, 30 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt index f4445e5..1e09703 100644 --- a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt +++ b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt @@ -22,6 +22,8 @@ Optional Properties: - pclkN, clkN: Pairs of parent of input clock and input clock to the devices in this power domain. Maximum of 4 pairs (N = 0 to 3) are supported currently. +- power-domains: phandle pointing to the parent power domain, for more details + see Documentation/devicetree/bindings/power/power_domain.txt Node of a device using power domains must have a power-domains property defined with a phandle to respective power domain. diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c index 20f2671..37266a8 100644 --- a/arch/arm/mach-exynos/pm_domains.c +++ b/arch/arm/mach-exynos/pm_domains.c @@ -161,6 +161,34 @@ no_clk: of_genpd_add_provider_simple(np, &pd->pd); } + /* Assign the child power domains to their parents */ + for_each_compatible_node(np, NULL, "samsung,exynos4210-pd") { + struct generic_pm_domain *child_domain, *parent_domain; + struct of_phandle_args args; + + args.np = np; + args.args_count = 0; + child_domain = of_genpd_get_from_provider(&args); + if (!child_domain) + continue; + + if (of_parse_phandle_with_args(np, "power-domains", + "#power-domain-cells", 0, &args) != 0) + continue; + + parent_domain = of_genpd_get_from_provider(&args); + if (!parent_domain) + continue; + + if (pm_genpd_add_subdomain(parent_domain, child_domain)) + pr_warn("%s failed to add subdomain: %s\n", + parent_domain->name, child_domain->name); + else + pr_info("%s has as child subdomain: %s.\n", + parent_domain->name, child_domain->name); + of_node_put(np); + } + return 0; } arch_initcall(exynos4_pm_init_power_domain); -- 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 14:44:46 +0100 Subject: [PATCH v3 2/7] ARM: Exynos: add support for sub-power domains In-Reply-To: <1421243091-10778-1-git-send-email-m.szyprowski@samsung.com> References: <1421243091-10778-1-git-send-email-m.szyprowski@samsung.com> Message-ID: <1421243091-10778-3-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 support for making one power domain a sub-domain of other domain. This is useful for modeling power dependences for devices like TV Mixer or Camera ISP, which needs to have more than one power domain enabled to be operational. Based on previous work by Amit Daniel Kachhap . Signed-off-by: Marek Szyprowski --- .../bindings/arm/exynos/power_domain.txt | 2 ++ arch/arm/mach-exynos/pm_domains.c | 28 ++++++++++++++++++++++ 2 files changed, 30 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt index f4445e5..1e09703 100644 --- a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt +++ b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt @@ -22,6 +22,8 @@ Optional Properties: - pclkN, clkN: Pairs of parent of input clock and input clock to the devices in this power domain. Maximum of 4 pairs (N = 0 to 3) are supported currently. +- power-domains: phandle pointing to the parent power domain, for more details + see Documentation/devicetree/bindings/power/power_domain.txt Node of a device using power domains must have a power-domains property defined with a phandle to respective power domain. diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c index 20f2671..37266a8 100644 --- a/arch/arm/mach-exynos/pm_domains.c +++ b/arch/arm/mach-exynos/pm_domains.c @@ -161,6 +161,34 @@ no_clk: of_genpd_add_provider_simple(np, &pd->pd); } + /* Assign the child power domains to their parents */ + for_each_compatible_node(np, NULL, "samsung,exynos4210-pd") { + struct generic_pm_domain *child_domain, *parent_domain; + struct of_phandle_args args; + + args.np = np; + args.args_count = 0; + child_domain = of_genpd_get_from_provider(&args); + if (!child_domain) + continue; + + if (of_parse_phandle_with_args(np, "power-domains", + "#power-domain-cells", 0, &args) != 0) + continue; + + parent_domain = of_genpd_get_from_provider(&args); + if (!parent_domain) + continue; + + if (pm_genpd_add_subdomain(parent_domain, child_domain)) + pr_warn("%s failed to add subdomain: %s\n", + parent_domain->name, child_domain->name); + else + pr_info("%s has as child subdomain: %s.\n", + parent_domain->name, child_domain->name); + of_node_put(np); + } + return 0; } arch_initcall(exynos4_pm_init_power_domain); -- 1.9.2