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authorTomasz Figa <tomasz.figa@gmail.com>2014-09-19 20:27:43 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-09-22 15:57:40 +0200
commita4a8c2c4962bb655e7152c53a0eb6ca31c47f159 (patch)
treeaf36f6e73ca3bd4d653c485d8858e0fcc6b06f2b
parent207f1a2d294e3781b56d1acecd48aaa3b4b7b2ad (diff)
ARM: exynos: Move to generic PM domain DT bindings
This patch moves Exynos PM domain code to use the new generic PM domain look-up framework introduced in previous patches, thus also allowing the new code to be compiled with CONFIG_ARCH_EXYNOS. This patch was originally submitted by Tomasz Figa when he was employed by Samsung. Link: http://marc.info/?l=linux-pm&m=139955336002083&w=2 Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Kevin Hilman <khilman@linaro.org> Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
-rw-r--r--Documentation/devicetree/bindings/arm/exynos/power_domain.txt13
-rw-r--r--arch/arm/mach-exynos/pm_domains.c78
-rw-r--r--kernel/power/Kconfig2
3 files changed, 8 insertions, 85 deletions
diff --git a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt
index 8b4f7b7fe88..abde1ea8a11 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.
Optional Properties:
- clocks: List of clock handles. The parent clocks of the input clocks to the
@@ -29,6 +31,7 @@ Example:
lcd0: power-domain-lcd0 {
compatible = "samsung,exynos4210-pd";
reg = <0x10023C00 0x10>;
+ #power-domain-cells = <0>;
};
mfc_pd: power-domain@10044060 {
@@ -37,12 +40,8 @@ Example:
clocks = <&clock CLK_FIN_PLL>, <&clock CLK_MOUT_SW_ACLK333>,
<&clock CLK_MOUT_USER_ACLK333>;
clock-names = "oscclk", "pclk0", "clk0";
+ #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 fd76e1b5a47..20f267121b3 100644
--- a/arch/arm/mach-exynos/pm_domains.c
+++ b/arch/arm/mach-exynos/pm_domains.c
@@ -105,78 +105,6 @@ 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;
@@ -202,7 +130,6 @@ 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;
pd->oscclk = clk_get(dev, "oscclk");
if (IS_ERR(pd->oscclk))
@@ -228,15 +155,12 @@ static __init int exynos4_pm_init_power_domain(void)
clk_put(pd->oscclk);
no_clk:
- platform_set_drvdata(pdev, pd);
-
on = __raw_readl(pd->base + 0x4) & INT_LOCAL_PWR_EN;
pm_genpd_init(&pd->pd, NULL, !on);
+ of_genpd_add_provider_simple(np, &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 897619b11fb..bbef57f5bdf 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -304,7 +304,7 @@ 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