Merge tag 'pm-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates for 3.4 from Rafael Wysocki:
 "Assorted extensions and fixes including:

  * Introduction of early/late suspend/hibernation device callbacks.
  * Generic PM domains extensions and fixes.
  * devfreq updates from Axel Lin and MyungJoo Ham.
  * Device PM QoS updates.
  * Fixes of concurrency problems with wakeup sources.
  * System suspend and hibernation fixes."

* tag 'pm-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (43 commits)
  PM / Domains: Check domain status during hibernation restore of devices
  PM / devfreq: add relation of recommended frequency.
  PM / shmobile: Make MTU2 driver use pm_genpd_dev_always_on()
  PM / shmobile: Make CMT driver use pm_genpd_dev_always_on()
  PM / shmobile: Make TMU driver use pm_genpd_dev_always_on()
  PM / Domains: Introduce "always on" device flag
  PM / Domains: Fix hibernation restore of devices, v2
  PM / Domains: Fix handling of wakeup devices during system resume
  sh_mmcif / PM: Use PM QoS latency constraint
  tmio_mmc / PM: Use PM QoS latency constraint
  PM / QoS: Make it possible to expose PM QoS latency constraints
  PM / Sleep: JBD and JBD2 missing set_freezable()
  PM / Domains: Fix include for PM_GENERIC_DOMAINS=n case
  PM / Freezer: Remove references to TIF_FREEZE in comments
  PM / Sleep: Add more wakeup source initialization routines
  PM / Hibernate: Enable usermodehelpers in hibernate() error path
  PM / Sleep: Make __pm_stay_awake() delete wakeup source timers
  PM / Sleep: Fix race conditions related to wakeup source timer function
  PM / Sleep: Fix possible infinite loop during wakeup source destruction
  PM / Hibernate: print physical addresses consistently with other parts of kernel
  ...

1 files changed, 195 insertions, 0 deletions

diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c
new file mode 100644
index 0000000..0b04af2
--- /dev/null
+++ b/arch/arm/mach-exynos/pm_domains.c
@@ -0,0 +1,195 @@
+/*
+ * Exynos Generic power domain support.
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Implementation of Exynos specific power domain control which is used in
+ * conjunction with runtime-pm. Support for both device-tree and non-device-tree
+ * based power domain support is included.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/io.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/pm_domain.h>
+#include <linux/delay.h>
+#include <linux/of_address.h>
+
+#include <mach/regs-pmu.h>
+#include <plat/devs.h>
+
+/*
+ * Exynos specific wrapper around the generic power domain
+ */
+struct exynos_pm_domain {
+	void __iomem *base;
+	char const *name;
+	bool is_off;
+	struct generic_pm_domain pd;
+};
+
+static int exynos_pd_power(struct generic_pm_domain *domain, bool power_on)
+{
+	struct exynos_pm_domain *pd;
+	void __iomem *base;
+	u32 timeout, pwr;
+	char *op;
+
+	pd = container_of(domain, struct exynos_pm_domain, pd);
+	base = pd->base;
+
+	pwr = power_on ? S5P_INT_LOCAL_PWR_EN : 0;
+	__raw_writel(pwr, base);
+
+	/* Wait max 1ms */
+	timeout = 10;
+
+	while ((__raw_readl(base + 0x4) & S5P_INT_LOCAL_PWR_EN)	!= pwr) {
+		if (!timeout) {
+			op = (power_on) ? "enable" : "disable";
+			pr_err("Power domain %s %s failed\n", domain->name, op);
+			return -ETIMEDOUT;
+		}
+		timeout--;
+		cpu_relax();
+		usleep_range(80, 100);
+	}
+	return 0;
+}
+
+static int exynos_pd_power_on(struct generic_pm_domain *domain)
+{
+	return exynos_pd_power(domain, true);
+}
+
+static int exynos_pd_power_off(struct generic_pm_domain *domain)
+{
+	return exynos_pd_power(domain, false);
+}
+
+#define EXYNOS_GPD(PD, BASE, NAME)			\
+static struct exynos_pm_domain PD = {			\
+	.base = (void __iomem *)BASE,			\
+	.name = NAME,					\
+	.pd = {						\
+		.power_off = exynos_pd_power_off,	\
+		.power_on = exynos_pd_power_on,	\
+	},						\
+}
+
+#ifdef CONFIG_OF
+static __init int exynos_pm_dt_parse_domains(void)
+{
+	struct device_node *np;
+
+	for_each_compatible_node(np, NULL, "samsung,exynos4210-pd") {
+		struct exynos_pm_domain *pd;
+
+		pd = kzalloc(sizeof(*pd), GFP_KERNEL);
+		if (!pd) {
+			pr_err("%s: failed to allocate memory for domain\n",
+					__func__);
+			return -ENOMEM;
+		}
+
+		if (of_get_property(np, "samsung,exynos4210-pd-off", NULL))
+			pd->is_off = true;
+		pd->name = np->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);
+	}
+	return 0;
+}
+#else
+static __init int exynos_pm_dt_parse_domains(void)
+{
+	return 0;
+}
+#endif /* CONFIG_OF */
+
+static __init void exynos_pm_add_dev_to_genpd(struct platform_device *pdev,
+						struct exynos_pm_domain *pd)
+{
+	if (pdev->dev.bus) {
+		if (pm_genpd_add_device(&pd->pd, &pdev->dev))
+			pr_info("%s: error in adding %s device to %s power"
+				"domain\n", __func__, dev_name(&pdev->dev),
+				pd->name);
+	}
+}
+
+EXYNOS_GPD(exynos4_pd_mfc, S5P_PMU_MFC_CONF, "pd-mfc");
+EXYNOS_GPD(exynos4_pd_g3d, S5P_PMU_G3D_CONF, "pd-g3d");
+EXYNOS_GPD(exynos4_pd_lcd0, S5P_PMU_LCD0_CONF, "pd-lcd0");
+EXYNOS_GPD(exynos4_pd_lcd1, S5P_PMU_LCD1_CONF, "pd-lcd1");
+EXYNOS_GPD(exynos4_pd_tv, S5P_PMU_TV_CONF, "pd-tv");
+EXYNOS_GPD(exynos4_pd_cam, S5P_PMU_CAM_CONF, "pd-cam");
+EXYNOS_GPD(exynos4_pd_gps, S5P_PMU_GPS_CONF, "pd-gps");
+
+static struct exynos_pm_domain *exynos4_pm_domains[] = {
+	&exynos4_pd_mfc,
+	&exynos4_pd_g3d,
+	&exynos4_pd_lcd0,
+	&exynos4_pd_lcd1,
+	&exynos4_pd_tv,
+	&exynos4_pd_cam,
+	&exynos4_pd_gps,
+};
+
+static __init int exynos4_pm_init_power_domain(void)
+{
+	int idx;
+
+	if (of_have_populated_dt())
+		return exynos_pm_dt_parse_domains();
+
+	for (idx = 0; idx < ARRAY_SIZE(exynos4_pm_domains); idx++)
+		pm_genpd_init(&exynos4_pm_domains[idx]->pd, NULL,
+				exynos4_pm_domains[idx]->is_off);
+
+#ifdef CONFIG_S5P_DEV_FIMD0
+	exynos_pm_add_dev_to_genpd(&s5p_device_fimd0, &exynos4_pd_lcd0);
+#endif
+#ifdef CONFIG_S5P_DEV_TV
+	exynos_pm_add_dev_to_genpd(&s5p_device_hdmi, &exynos4_pd_tv);
+	exynos_pm_add_dev_to_genpd(&s5p_device_mixer, &exynos4_pd_tv);
+#endif
+#ifdef CONFIG_S5P_DEV_MFC
+	exynos_pm_add_dev_to_genpd(&s5p_device_mfc, &exynos4_pd_mfc);
+#endif
+#ifdef CONFIG_S5P_DEV_FIMC0
+	exynos_pm_add_dev_to_genpd(&s5p_device_fimc0, &exynos4_pd_cam);
+#endif
+#ifdef CONFIG_S5P_DEV_FIMC1
+	exynos_pm_add_dev_to_genpd(&s5p_device_fimc1, &exynos4_pd_cam);
+#endif
+#ifdef CONFIG_S5P_DEV_FIMC2
+	exynos_pm_add_dev_to_genpd(&s5p_device_fimc2, &exynos4_pd_cam);
+#endif
+#ifdef CONFIG_S5P_DEV_FIMC3
+	exynos_pm_add_dev_to_genpd(&s5p_device_fimc3, &exynos4_pd_cam);
+#endif
+#ifdef CONFIG_S5P_DEV_CSIS0
+	exynos_pm_add_dev_to_genpd(&s5p_device_mipi_csis0, &exynos4_pd_cam);
+#endif
+#ifdef CONFIG_S5P_DEV_CSIS1
+	exynos_pm_add_dev_to_genpd(&s5p_device_mipi_csis1, &exynos4_pd_cam);
+#endif
+	return 0;
+}
+arch_initcall(exynos4_pm_init_power_domain);
+
+static __init int exynos_pm_late_initcall(void)
+{
+	pm_genpd_poweroff_unused();
+	return 0;
+}
+late_initcall(exynos_pm_late_initcall);