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authorOlof Johansson <olof@lixom.net>2012-11-26 00:06:23 -0800
committerOlof Johansson <olof@lixom.net>2012-11-26 00:06:23 -0800
commitd408c5dcc524dfc8e687c443719a3d6be86e2ea0 (patch)
tree0fee3f9936e9950d3b0db7d4f466b2b89718a2bb /arch/arm/mach-exynos
parent8d2282a77bf0977e7033d8ea5970f369bc28f0f0 (diff)
parentd80162eccd56c40228e1232de8a203e8553b20a4 (diff)
downloadop-kernel-dev-d408c5dcc524dfc8e687c443719a3d6be86e2ea0.zip
op-kernel-dev-d408c5dcc524dfc8e687c443719a3d6be86e2ea0.tar.gz
Merge branch 'next/dt-samsung-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/dt
From Kukjin Kim: Here is second Samsung DT stuff for v3.8. This is including power domain DT support for exynos and Google ARM Chromebook, Snow board and exynos4210-origen updates. * 'next/dt-samsung-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: ARM: dts: Use drive strength 3 for SD pins for exynos4 ARM: dts: Set up power domains for exynos4 ARM: EXYNOS: Bind devices to power domains using DT ARM: EXYNOS: Fix power domain name initialization ARM: EXYNOS: Detect power domain state on registration from DT ARM: dts: Add vmmc fixed voltage regulator for exynos4210-origen ARM: dts: Update sdhci nodes for current bindings for exynos4210-origen ARM: dts: Update for pinctrl-samsung driver for exynos4210-origen ARM: dts: Split memory sections for exynos4210-origen ARM: EXYNOS: add all i2c busses to auxdata for DT ARM: dts: Add aliases for i2c controller for exynos4 ARM: dts: Add board dts file for Snow board (ARM Chromebook) ARM: dts: Move the dwmmc aliases from smdk5250 dts to exynos Add/add conflicts resolved in arch/arm/boot/dts/exynos5250-smdk5250.dts and arch/arm/mach-exynos/mach-exynos5-dt.c. Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/arm/mach-exynos')
-rw-r--r--arch/arm/mach-exynos/mach-exynos5-dt.c10
-rw-r--r--arch/arm/mach-exynos/pm_domains.c93
2 files changed, 99 insertions, 4 deletions
diff --git a/arch/arm/mach-exynos/mach-exynos5-dt.c b/arch/arm/mach-exynos/mach-exynos5-dt.c
index 28146f2..25f464c 100644
--- a/arch/arm/mach-exynos/mach-exynos5-dt.c
+++ b/arch/arm/mach-exynos/mach-exynos5-dt.c
@@ -52,6 +52,16 @@ static const struct of_dev_auxdata exynos5250_auxdata_lookup[] __initconst = {
"s3c2440-i2c.1", NULL),
OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(2),
"s3c2440-i2c.2", NULL),
+ OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(3),
+ "s3c2440-i2c.3", NULL),
+ OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(4),
+ "s3c2440-i2c.4", NULL),
+ OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(5),
+ "s3c2440-i2c.5", NULL),
+ OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(6),
+ "s3c2440-i2c.6", NULL),
+ OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(7),
+ "s3c2440-i2c.7", NULL),
OF_DEV_AUXDATA("samsung,s3c2440-hdmiphy-i2c", EXYNOS5_PA_IIC(8),
"s3c2440-hdmiphy-i2c", NULL),
OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI0,
diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c
index c0bc83a..9f1351d 100644
--- a/arch/arm/mach-exynos/pm_domains.c
+++ b/arch/arm/mach-exynos/pm_domains.c
@@ -19,6 +19,8 @@
#include <linux/pm_domain.h>
#include <linux/delay.h>
#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/sched.h>
#include <mach/regs-pmu.h>
#include <plat/devs.h>
@@ -83,12 +85,88 @@ static struct exynos_pm_domain PD = { \
}
#ifdef CONFIG_OF
+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 exynos_pm_dt_parse_domains(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) {
@@ -97,15 +175,22 @@ static __init int exynos_pm_dt_parse_domains(void)
return -ENOMEM;
}
- if (of_get_property(np, "samsung,exynos4210-pd-off", NULL))
- pd->is_off = true;
- pd->name = np->name;
+ pd->pd.name = kstrdup(np->name, GFP_KERNEL);
+ pd->name = pd->pd.name;
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;
- pm_genpd_init(&pd->pd, NULL, false);
+
+ platform_set_drvdata(pdev, pd);
+
+ on = __raw_readl(pd->base + 0x4) & S5P_INT_LOCAL_PWR_EN;
+
+ pm_genpd_init(&pd->pd, NULL, !on);
}
+
+ bus_register_notifier(&platform_bus_type, &platform_nb);
+
return 0;
}
#else
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