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Message-id: <1399553355-6615-4-git-send-email-t.figa@samsung.com>
Date: Thu, 08 May 2014 14:49:15 +0200
From: Tomasz Figa <t.figa@...sung.com>
To: linux-pm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
Pavel Machek <pavel@....cz>, Len Brown <len.brown@...el.com>,
Russell King - ARM Linux <linux@....linux.org.uk>,
Kukjin Kim <kgene.kim@...sung.com>,
Kumar Gala <galak@...eaurora.org>,
Mark Rutland <mark.rutland@....com>,
Pawel Moll <pawel.moll@....com>,
Rob Herring <robh+dt@...nel.org>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
Stephen Warren <swarren@...dotorg.org>,
Stephen Boyd <sboyd@...eaurora.org>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
Ulf Hansson <ulf.hansson@...aro.org>,
Marek Szyprowski <m.szyprowski@...sung.com>,
Kevin Hilman <khilman@...aro.org>,
Philipp Zabel <philipp.zabel@...il.com>,
Tomasz Figa <tomasz.figa@...il.com>,
Tomasz Figa <t.figa@...sung.com>
Subject: [PATCH v4 3/3] ARM: exynos: Move to generic power domain bindings
This patch moves Exynos power domain code to use the new generic power
domain look-up framework introduced by previous patch, allowing the new
code to be compiled with CONFIG_ARCH_EXYNOS selected as well.
Signed-off-by: Tomasz Figa <t.figa@...sung.com>
Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>
---
.../bindings/arm/exynos/power_domain.txt | 12 ++--
arch/arm/mach-exynos/pm_domains.c | 81 +---------------------
kernel/power/Kconfig | 2 +-
3 files changed, 7 insertions(+), 88 deletions(-)
diff --git a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt
index 5216b41..60f26a8 100644
--- a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt
+++ b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt
@@ -8,6 +8,8 @@ Required Properties:
* samsung,exynos4210-pd - for exynos4210 type power domain.
- reg: physical base address of the controller and length of memory mapped
region.
+- #power-domain-cells: number of cells in power domain specifier;
+ must be 0.
Node of a device using power domains must have a samsung,power-domain property
defined with a phandle to respective power domain.
@@ -17,12 +19,8 @@ Example:
lcd0: power-domain-lcd0 {
compatible = "samsung,exynos4210-pd";
reg = <0x10023C00 0x10>;
+ #power-domain-cells = <0>;
};
-Example of the node using power domain:
-
- node {
- /* ... */
- samsung,power-domain = <&lcd0>;
- /* ... */
- };
+See Documentation/devicetree/bindings/power/power_domain.txt for description
+of consumer-side bindings.
diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c
index fe6570e..9cad3c6 100644
--- a/arch/arm/mach-exynos/pm_domains.c
+++ b/arch/arm/mach-exynos/pm_domains.c
@@ -73,89 +73,14 @@ static int exynos_pd_power_off(struct generic_pm_domain *domain)
return exynos_pd_power(domain, false);
}
-static void exynos_add_device_to_domain(struct exynos_pm_domain *pd,
- struct device *dev)
-{
- int ret;
-
- dev_dbg(dev, "adding to power domain %s\n", pd->pd.name);
-
- while (1) {
- ret = pm_genpd_add_device(&pd->pd, dev);
- if (ret != -EAGAIN)
- break;
- cond_resched();
- }
-
- pm_genpd_dev_need_restore(dev, true);
-}
-
-static void exynos_remove_device_from_domain(struct device *dev)
-{
- struct generic_pm_domain *genpd = dev_to_genpd(dev);
- int ret;
-
- dev_dbg(dev, "removing from power domain %s\n", genpd->name);
-
- while (1) {
- ret = pm_genpd_remove_device(genpd, dev);
- if (ret != -EAGAIN)
- break;
- cond_resched();
- }
-}
-
-static void exynos_read_domain_from_dt(struct device *dev)
-{
- struct platform_device *pd_pdev;
- struct exynos_pm_domain *pd;
- struct device_node *node;
-
- node = of_parse_phandle(dev->of_node, "samsung,power-domain", 0);
- if (!node)
- return;
- pd_pdev = of_find_device_by_node(node);
- if (!pd_pdev)
- return;
- pd = platform_get_drvdata(pd_pdev);
- exynos_add_device_to_domain(pd, dev);
-}
-
-static int exynos_pm_notifier_call(struct notifier_block *nb,
- unsigned long event, void *data)
-{
- struct device *dev = data;
-
- switch (event) {
- case BUS_NOTIFY_BIND_DRIVER:
- if (dev->of_node)
- exynos_read_domain_from_dt(dev);
-
- break;
-
- case BUS_NOTIFY_UNBOUND_DRIVER:
- exynos_remove_device_from_domain(dev);
-
- break;
- }
- return NOTIFY_DONE;
-}
-
-static struct notifier_block platform_nb = {
- .notifier_call = exynos_pm_notifier_call,
-};
-
static __init int exynos4_pm_init_power_domain(void)
{
- struct platform_device *pdev;
struct device_node *np;
for_each_compatible_node(np, NULL, "samsung,exynos4210-pd") {
struct exynos_pm_domain *pd;
int on;
- pdev = of_find_device_by_node(np);
-
pd = kzalloc(sizeof(*pd), GFP_KERNEL);
if (!pd) {
pr_err("%s: failed to allocate memory for domain\n",
@@ -168,17 +93,13 @@ static __init int exynos4_pm_init_power_domain(void)
pd->base = of_iomap(np, 0);
pd->pd.power_off = exynos_pd_power_off;
pd->pd.power_on = exynos_pd_power_on;
- pd->pd.of_node = np;
-
- platform_set_drvdata(pdev, pd);
on = __raw_readl(pd->base + 0x4) & S5P_INT_LOCAL_PWR_EN;
pm_genpd_init(&pd->pd, NULL, !on);
+ of_genpd_add_provider(np, of_genpd_xlate_simple, &pd->pd);
}
- bus_register_notifier(&platform_bus_type, &platform_nb);
-
return 0;
}
arch_initcall(exynos4_pm_init_power_domain);
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 45aa98e..b17588c 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -308,7 +308,7 @@ config PM_GENERIC_DOMAINS_RUNTIME
config PM_GENERIC_DOMAINS_OF
def_bool y
- depends on PM_GENERIC_DOMAINS && OF && !ARCH_EXYNOS
+ depends on PM_GENERIC_DOMAINS && OF
config CPU_PM
bool
--
1.9.2
--
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