Merge tag 'tegra-for-3.10-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into next/soc

From Stephen Warren <swarren@wwwdotorg.org>:

ARM: tegra: core SoC support development

This branch includes major development on the core Tegra SoC support code
in the mach-tegra directory:

* SMP support for Tegra114.
* Exposes SoC chip ID and revision through standard sysfs files.
* System-level suspend/resume for Tegra20/30. At present, this only
  supports "LP2" mode (CPU power-down), but provides the basis to
  implement "LP0"/"LP1" (various levels of core/chip power-down) in the
  hopefully near future.
* A minor cleanup of a duplicate include, which was introduced in this
  branch.

This branch is based on the previous cleanup pull request.

* tag 'tegra-for-3.10-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra:
  ARM: tegra: pm: remove duplicated include from pm.c
  ARM: tegra: cpuidle: remove redundant parameters for powered-down mode
  ARM: tegra: pm: add platform suspend support
  ARM: dt: tegra: add bindings of power management configurations for PMC
  ARM: tegra: irq: add wake up handling
  gpio: tegra: add gpio wakeup source handling
  ARM: tegra: moving the CPU power timer function to PMC driver
  ARM: tegra: add clock source of PMC to device trees
  ARM: tegra: add speedo-based process id for Tegra114
  ARM: tegra: expose chip ID and revision
  ARM: tegra: bring up secondary CPU for Tegra114

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 81 insertions, 50 deletions

diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c
index acacbe8d1afc..d647e9e0e197 100644
--- a/arch/arm/mach-tegra/pm.c
+++ b/arch/arm/mach-tegra/pm.c
@@ -22,7 +22,7 @@
 #include <linux/cpumask.h>
 #include <linux/delay.h>
 #include <linux/cpu_pm.h>
-#include <linux/clk.h>
+#include <linux/suspend.h>
 #include <linux/err.h>
 #include <linux/clk/tegra.h>
 
@@ -37,52 +37,13 @@
 #include "reset.h"
 #include "flowctrl.h"
 #include "fuse.h"
+#include "pmc.h"
 #include "sleep.h"
 
-#define TEGRA_POWER_CPU_PWRREQ_OE	(1 << 16)  /* CPU pwr req enable */
-
-#define PMC_CTRL		0x0
-#define PMC_CPUPWRGOOD_TIMER	0xc8
-#define PMC_CPUPWROFF_TIMER	0xcc
-
 #ifdef CONFIG_PM_SLEEP
 static DEFINE_SPINLOCK(tegra_lp2_lock);
-static void __iomem *pmc = IO_ADDRESS(TEGRA_PMC_BASE);
-static struct clk *tegra_pclk;
 void (*tegra_tear_down_cpu)(void);
 
-static void set_power_timers(unsigned long us_on, unsigned long us_off)
-{
-	unsigned long long ticks;
-	unsigned long long pclk;
-	unsigned long rate;
-	static unsigned long tegra_last_pclk;
-
-	if (tegra_pclk == NULL) {
-		tegra_pclk = clk_get_sys(NULL, "pclk");
-		WARN_ON(IS_ERR(tegra_pclk));
-	}
-
-	rate = clk_get_rate(tegra_pclk);
-
-	if (WARN_ON_ONCE(rate <= 0))
-		pclk = 100000000;
-	else
-		pclk = rate;
-
-	if ((rate != tegra_last_pclk)) {
-		ticks = (us_on * pclk) + 999999ull;
-		do_div(ticks, 1000000);
-		writel((unsigned long)ticks, pmc + PMC_CPUPWRGOOD_TIMER);
-
-		ticks = (us_off * pclk) + 999999ull;
-		do_div(ticks, 1000000);
-		writel((unsigned long)ticks, pmc + PMC_CPUPWROFF_TIMER);
-		wmb();
-	}
-	tegra_last_pclk = pclk;
-}
-
 /*
  * restore_cpu_complex
  *
@@ -173,16 +134,9 @@ static int tegra_sleep_cpu(unsigned long v2p)
 	return 0;
 }
 
-void tegra_idle_lp2_last(u32 cpu_on_time, u32 cpu_off_time)
+void tegra_idle_lp2_last(void)
 {
-	u32 mode;
-
-	/* Only the last cpu down does the final suspend steps */
-	mode = readl(pmc + PMC_CTRL);
-	mode |= TEGRA_POWER_CPU_PWRREQ_OE;
-	writel(mode, pmc + PMC_CTRL);
-
-	set_power_timers(cpu_on_time, cpu_off_time);
+	tegra_pmc_pm_set(TEGRA_SUSPEND_LP2);
 
 	cpu_cluster_pm_enter();
 	suspend_cpu_complex();
@@ -192,4 +146,81 @@ void tegra_idle_lp2_last(u32 cpu_on_time, u32 cpu_off_time)
 	restore_cpu_complex();
 	cpu_cluster_pm_exit();
 }
+
+enum tegra_suspend_mode tegra_pm_validate_suspend_mode(
+				enum tegra_suspend_mode mode)
+{
+	/* Tegra114 didn't support any suspending mode yet. */
+	if (tegra_chip_id == TEGRA114)
+		return TEGRA_SUSPEND_NONE;
+
+	/*
+	 * The Tegra devices only support suspending to LP2 currently.
+	 */
+	if (mode > TEGRA_SUSPEND_LP2)
+		return TEGRA_SUSPEND_LP2;
+
+	return mode;
+}
+
+static const char *lp_state[TEGRA_MAX_SUSPEND_MODE] = {
+	[TEGRA_SUSPEND_NONE] = "none",
+	[TEGRA_SUSPEND_LP2] = "LP2",
+	[TEGRA_SUSPEND_LP1] = "LP1",
+	[TEGRA_SUSPEND_LP0] = "LP0",
+};
+
+static int __cpuinit tegra_suspend_enter(suspend_state_t state)
+{
+	enum tegra_suspend_mode mode = tegra_pmc_get_suspend_mode();
+
+	if (WARN_ON(mode < TEGRA_SUSPEND_NONE ||
+		    mode >= TEGRA_MAX_SUSPEND_MODE))
+		return -EINVAL;
+
+	pr_info("Entering suspend state %s\n", lp_state[mode]);
+
+	tegra_pmc_pm_set(mode);
+
+	local_fiq_disable();
+
+	suspend_cpu_complex();
+	switch (mode) {
+	case TEGRA_SUSPEND_LP2:
+		tegra_set_cpu_in_lp2(0);
+		break;
+	default:
+		break;
+	}
+
+	cpu_suspend(PHYS_OFFSET - PAGE_OFFSET, &tegra_sleep_cpu);
+
+	switch (mode) {
+	case TEGRA_SUSPEND_LP2:
+		tegra_clear_cpu_in_lp2(0);
+		break;
+	default:
+		break;
+	}
+	restore_cpu_complex();
+
+	local_fiq_enable();
+
+	return 0;
+}
+
+static const struct platform_suspend_ops tegra_suspend_ops = {
+	.valid		= suspend_valid_only_mem,
+	.enter		= tegra_suspend_enter,
+};
+
+void __init tegra_init_suspend(void)
+{
+	if (tegra_pmc_get_suspend_mode() == TEGRA_SUSPEND_NONE)
+		return;
+
+	tegra_pmc_suspend_init();
+
+	suspend_set_ops(&tegra_suspend_ops);
+}
 #endif