ARM: tegra: cpuidle: separate cpuidle driver for different chips

The different Tegra chips may have different CPU idle states and data.
Individual CPU idle driver make it more easy to maintain.
Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

arch/arm/mach-tegra/Makefile

@@ -15,9 +15,16 @@ obj-$(CONFIG_ARCH_TEGRA_2x_SOC)         += tegra20_clocks_data.o
 obj-$(CONFIG_ARCH_TEGRA_2x_SOC)		+= tegra20_speedo.o
 obj-$(CONFIG_ARCH_TEGRA_2x_SOC)		+= tegra2_emc.o
 obj-$(CONFIG_ARCH_TEGRA_2x_SOC)		+= sleep-tegra20.o
+ifeq ($(CONFIG_CPU_IDLE),y)
+obj-$(CONFIG_ARCH_TEGRA_2x_SOC)		+= cpuidle-tegra20.o
+endif
 obj-$(CONFIG_ARCH_TEGRA_3x_SOC)		+= tegra30_clocks.o
 obj-$(CONFIG_ARCH_TEGRA_3x_SOC)		+= tegra30_clocks_data.o
 obj-$(CONFIG_ARCH_TEGRA_3x_SOC)		+= tegra30_speedo.o
+obj-$(CONFIG_ARCH_TEGRA_3x_SOC)		+= sleep-tegra30.o
+ifeq ($(CONFIG_CPU_IDLE),y)
+obj-$(CONFIG_ARCH_TEGRA_3x_SOC)		+= cpuidle-tegra30.o
+endif
 obj-$(CONFIG_SMP)			+= platsmp.o headsmp.o
 obj-$(CONFIG_SMP)                       += reset.o
 obj-$(CONFIG_HOTPLUG_CPU)               += hotplug.o

arch/arm/mach-tegra/cpuidle-tegra20.c

+/*
+ * CPU idle driver for Tegra CPUs
+ *
+ * Copyright (c) 2010-2012, NVIDIA Corporation.
+ * Copyright (c) 2011 Google, Inc.
+ * Author: Colin Cross <ccross@android.com>
+ *         Gary King <gking@nvidia.com>
+ *
+ * Rework for 3.3 by Peter De Schrijver <pdeschrijver@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/cpuidle.h>
+
+#include <asm/cpuidle.h>
+
+static struct cpuidle_driver tegra_idle_driver = {
+	.name = "tegra_idle",
+	.owner = THIS_MODULE,
+	.en_core_tk_irqen = 1,
+	.state_count = 1,
+	.states = {
+		[0] = ARM_CPUIDLE_WFI_STATE_PWR(600),
+	},
+};
+
+static DEFINE_PER_CPU(struct cpuidle_device, tegra_idle_device);
+
+int __init tegra20_cpuidle_init(void)
+{
+	int ret;
+	unsigned int cpu;
+	struct cpuidle_device *dev;
+	struct cpuidle_driver *drv = &tegra_idle_driver;
+
+	ret = cpuidle_register_driver(&tegra_idle_driver);
+	if (ret) {
+		pr_err("CPUidle driver registration failed\n");
+		return ret;
+	}
+
+	for_each_possible_cpu(cpu) {
+		dev = &per_cpu(tegra_idle_device, cpu);
+		dev->cpu = cpu;
+
+		dev->state_count = drv->state_count;
+		ret = cpuidle_register_device(dev);
+		if (ret) {
+			pr_err("CPU%u: CPUidle device registration failed\n",
+				cpu);
+			return ret;
+		}
+	}
+	return 0;
+}

arch/arm/mach-tegra/cpuidle-tegra30.c

+/*
+ * CPU idle driver for Tegra CPUs
+ *
+ * Copyright (c) 2010-2012, NVIDIA Corporation.
+ * Copyright (c) 2011 Google, Inc.
+ * Author: Colin Cross <ccross@android.com>
+ *         Gary King <gking@nvidia.com>
+ *
+ * Rework for 3.3 by Peter De Schrijver <pdeschrijver@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/cpuidle.h>
+
+#include <asm/cpuidle.h>
+
+static struct cpuidle_driver tegra_idle_driver = {
+	.name = "tegra_idle",
+	.owner = THIS_MODULE,
+	.en_core_tk_irqen = 1,
+	.state_count = 1,
+	.states = {
+		[0] = ARM_CPUIDLE_WFI_STATE_PWR(600),
+	},
+};
+
+static DEFINE_PER_CPU(struct cpuidle_device, tegra_idle_device);
+
+int __init tegra30_cpuidle_init(void)
+{
+	int ret;
+	unsigned int cpu;
+	struct cpuidle_device *dev;
+	struct cpuidle_driver *drv = &tegra_idle_driver;
+
+	ret = cpuidle_register_driver(&tegra_idle_driver);
+	if (ret) {
+		pr_err("CPUidle driver registration failed\n");
+		return ret;
+	}
+
+	for_each_possible_cpu(cpu) {
+		dev = &per_cpu(tegra_idle_device, cpu);
+		dev->cpu = cpu;
+
+		dev->state_count = drv->state_count;
+		ret = cpuidle_register_device(dev);
+		if (ret) {
+			pr_err("CPU%u: CPUidle device registration failed\n",
+				cpu);
+			return ret;
+		}
+	}
+	return 0;
+}

arch/arm/mach-tegra/cpuidle.c

@@ -23,47 +23,26 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/cpuidle.h>
 
-#include <asm/cpuidle.h>
-
-struct cpuidle_driver tegra_idle_driver = {
-	.name = "tegra_idle",
-	.owner = THIS_MODULE,
-	.en_core_tk_irqen = 1,
-	.state_count = 1,
-	.states = {
-		[0] = ARM_CPUIDLE_WFI_STATE_PWR(600),
-	},
-};
-
-static DEFINE_PER_CPU(struct cpuidle_device, tegra_idle_device);
+#include "fuse.h"
+#include "cpuidle.h"
 
 static int __init tegra_cpuidle_init(void)
 {
 	int ret;
-	unsigned int cpu;
-	struct cpuidle_device *dev;
-	struct cpuidle_driver *drv = &tegra_idle_driver;
 
-	ret = cpuidle_register_driver(&tegra_idle_driver);
-	if (ret) {
-		pr_err("CPUidle driver registration failed\n");
-		return ret;
+	switch (tegra_chip_id) {
+	case TEGRA20:
+		ret = tegra20_cpuidle_init();
+		break;
+	case TEGRA30:
+		ret = tegra30_cpuidle_init();
+		break;
+	default:
+		ret = -ENODEV;
+		break;
 	}
 
-	for_each_possible_cpu(cpu) {
-		dev = &per_cpu(tegra_idle_device, cpu);
-		dev->cpu = cpu;
-
-		dev->state_count = drv->state_count;
-		ret = cpuidle_register_device(dev);
-		if (ret) {
-			pr_err("CPU%u: CPUidle device registration failed\n",
-				cpu);
-			return ret;
-		}
-	}
-	return 0;
+	return ret;
 }
 device_initcall(tegra_cpuidle_init);

arch/arm/mach-tegra/cpuidle.h

+/*
+ * Copyright (c) 2012, NVIDIA Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __MACH_TEGRA_CPUIDLE_H
+#define __MACH_TEGRA_CPUIDLE_H
+
+#ifdef CONFIG_ARCH_TEGRA_2x_SOC
+int tegra20_cpuidle_init(void);
+#else
+static inline int tegra20_cpuidle_init(void) { return -ENODEV; }
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_3x_SOC
+int tegra30_cpuidle_init(void);
+#else
+static inline int tegra30_cpuidle_init(void) { return -ENODEV; }
+#endif
+
+#endif