From 0b25e25bef0e03c0465c3eb1119b32cb906db689 Mon Sep 17 00:00:00 2001 From: Joseph Lo Date: Wed, 31 Oct 2012 17:41:15 +0800 Subject: 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 Signed-off-by: Stephen Warren --- arch/arm/mach-tegra/cpuidle-tegra30.c | 66 +++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 arch/arm/mach-tegra/cpuidle-tegra30.c (limited to 'arch/arm/mach-tegra/cpuidle-tegra30.c') 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 + * Gary King + * + * Rework for 3.3 by Peter De Schrijver + * + * 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 +#include +#include + +#include + +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; +} -- cgit