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>

5 files changed, 184 insertions, 34 deletions

diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index dcd4726ebbae..488159eaa429 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/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
diff --git a/arch/arm/mach-tegra/cpuidle-tegra20.c b/arch/arm/mach-tegra/cpuidle-tegra20.c
new file mode 100644
index 000000000000..d32e8b0dbd4f
--- /dev/null
+++ b/arch/arm/mach-tegra/cpuidle-tegra20.c
@@ -0,0 +1,66 @@
+/*
+ * 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;
+}
diff --git a/arch/arm/mach-tegra/cpuidle-tegra30.c b/arch/arm/mach-tegra/cpuidle-tegra30.c
new file mode 100644
index 000000000000..37e75512f697
--- /dev/null
+++ b/arch/arm/mach-tegra/cpuidle-tegra30.c
@@ -0,0 +1,66 @@
+/*
+ * 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;
+}
diff --git a/arch/arm/mach-tegra/cpuidle.c b/arch/arm/mach-tegra/cpuidle.c
index 4e0b07c7963c..d0651397aec7 100644
--- a/arch/arm/mach-tegra/cpuidle.c
+++ b/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);
diff --git a/arch/arm/mach-tegra/cpuidle.h b/arch/arm/mach-tegra/cpuidle.h
new file mode 100644
index 000000000000..496204d34e55
--- /dev/null
+++ b/arch/arm/mach-tegra/cpuidle.h
@@ -0,0 +1,32 @@
+/*
+ * 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