From: Marek Szyprowski <m.szyprowski@samsung.com> To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org Cc: Marek Szyprowski <m.szyprowski@samsung.com>, Kukjin Kim <kgene@kernel.org>, Inki Dae <inki.dae@samsung.com>, Tobias Jakobi <Liquid.Acid@gmx.net>, Daniel Drake <drake@endlessm.com>, Andrzej Hajda <a.hajda@samsung.com>, Tomasz Figa <tomasz.figa@gmail.com>, Pankaj Dubey <pankaj.dubey@samsung.com>, Amit Daniel Kachhap <amit.daniel@samsung.com>, Geert Uytterhoeven <geert@linux-m68k.org>, Ulf Hansson <ulf.hansson@linaro.org> Subject: [PATCH v2 2/7] ARM: Exynos: add support for sub-power domains Date: Wed, 03 Dec 2014 13:33:44 +0100 [thread overview] Message-ID: <1417610024-29748-1-git-send-email-m.szyprowski@samsung.com> (raw) In-Reply-To: <1416814256-24288-3-git-send-email-a.hajda@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. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> --- Documentation/devicetree/bindings/arm/exynos/power_domain.txt | 2 ++ arch/arm/mach-exynos/pm_domains.c | 11 ++++++++++- 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt index abde1ea8a119..b884358ebb1a 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. +- samsung,power-domain: phandle to a master power domain that the given domain + is a part of Node of a device using power domains must have a samsung,power-domain 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 20f267121b3e..fa9a47ddad81 100644 --- a/arch/arm/mach-exynos/pm_domains.c +++ b/arch/arm/mach-exynos/pm_domains.c @@ -108,7 +108,7 @@ static int exynos_pd_power_off(struct generic_pm_domain *domain) static __init int exynos4_pm_init_power_domain(void) { struct platform_device *pdev; - struct device_node *np; + struct device_node *np, *master_np; for_each_compatible_node(np, NULL, "samsung,exynos4210-pd") { struct exynos_pm_domain *pd; @@ -159,6 +159,15 @@ no_clk: pm_genpd_init(&pd->pd, NULL, !on); of_genpd_add_provider_simple(np, &pd->pd); + + /* make master and slave hierarchy */ + master_np = of_parse_phandle(np, "samsung,power-domain", 0); + if (!master_np) + master_np = of_parse_phandle(np, "power-domains", 0); + if (master_np) { + pm_genpd_add_subdomain_names(master_np->name, np->name); + of_node_put(master_np); + } } return 0; -- 1.9.2
WARNING: multiple messages have this Message-ID (diff)
From: m.szyprowski@samsung.com (Marek Szyprowski) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 2/7] ARM: Exynos: add support for sub-power domains Date: Wed, 03 Dec 2014 13:33:44 +0100 [thread overview] Message-ID: <1417610024-29748-1-git-send-email-m.szyprowski@samsung.com> (raw) In-Reply-To: <1416814256-24288-3-git-send-email-a.hajda@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. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> --- Documentation/devicetree/bindings/arm/exynos/power_domain.txt | 2 ++ arch/arm/mach-exynos/pm_domains.c | 11 ++++++++++- 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt index abde1ea8a119..b884358ebb1a 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. +- samsung,power-domain: phandle to a master power domain that the given domain + is a part of Node of a device using power domains must have a samsung,power-domain 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 20f267121b3e..fa9a47ddad81 100644 --- a/arch/arm/mach-exynos/pm_domains.c +++ b/arch/arm/mach-exynos/pm_domains.c @@ -108,7 +108,7 @@ static int exynos_pd_power_off(struct generic_pm_domain *domain) static __init int exynos4_pm_init_power_domain(void) { struct platform_device *pdev; - struct device_node *np; + struct device_node *np, *master_np; for_each_compatible_node(np, NULL, "samsung,exynos4210-pd") { struct exynos_pm_domain *pd; @@ -159,6 +159,15 @@ no_clk: pm_genpd_init(&pd->pd, NULL, !on); of_genpd_add_provider_simple(np, &pd->pd); + + /* make master and slave hierarchy */ + master_np = of_parse_phandle(np, "samsung,power-domain", 0); + if (!master_np) + master_np = of_parse_phandle(np, "power-domains", 0); + if (master_np) { + pm_genpd_add_subdomain_names(master_np->name, np->name); + of_node_put(master_np); + } } return 0; -- 1.9.2
next prev parent reply other threads:[~2014-12-03 12:34 UTC|newest] Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-11-24 7:30 [PATCH RESEND 0/7] Enable HDMI support on Exynos platforms Andrzej Hajda 2014-11-24 7:30 ` [PATCH RESEND 1/7] clk: samsung: exynos4: set parent of sclk_hdmiphy to hdmi Andrzej Hajda 2014-11-24 10:42 ` Sylwester Nawrocki 2014-11-24 7:30 ` [PATCH RESEND 2/7] ARM: Exynos: add support for sub-power domains Andrzej Hajda 2014-11-26 10:30 ` [RESEND,2/7] " Pankaj Dubey 2014-12-03 12:33 ` Marek Szyprowski [this message] 2014-12-03 12:33 ` [PATCH v2 2/7] " Marek Szyprowski 2014-12-03 12:36 ` Geert Uytterhoeven 2014-12-03 12:36 ` Geert Uytterhoeven 2014-12-03 12:36 ` Geert Uytterhoeven 2014-12-03 12:47 ` Marek Szyprowski 2014-12-03 12:47 ` Marek Szyprowski 2014-12-03 12:47 ` Marek Szyprowski 2014-12-03 19:57 ` Kevin Hilman 2014-12-03 19:57 ` Kevin Hilman 2014-12-03 19:57 ` Kevin Hilman 2014-12-04 3:45 ` amit daniel kachhap 2014-12-04 3:45 ` amit daniel kachhap 2014-12-04 3:45 ` amit daniel kachhap 2015-01-02 10:20 ` Marek Szyprowski 2015-01-02 10:20 ` Marek Szyprowski 2015-01-02 10:20 ` Marek Szyprowski 2014-11-24 7:30 ` [PATCH RESEND 3/7] ARM: dts: exynos4: add hdmi related nodes Andrzej Hajda 2014-11-24 7:30 ` [PATCH RESEND 4/7] ARM: dts: exynos4: add dependency between TV and LCD0 power domains Andrzej Hajda 2014-12-03 12:34 ` [PATCH v2 " Marek Szyprowski 2014-12-03 12:34 ` Marek Szyprowski 2014-11-24 7:30 ` [PATCH RESEND 5/7] ARM: dts: exynos4412-odroid: enable hdmi support Andrzej Hajda 2014-11-24 7:36 ` [PATCH RESEND 6/7] ARM: dts: exynos4210-universal_c210: " Andrzej Hajda 2014-11-24 7:36 ` [PATCH RESEND 7/7] ARM: dts: exynos5250: add display power domain Andrzej Hajda
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