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Release 4.17 drivers/cpuidle/cpuidle-zynq.c

Directory: drivers/cpuidle
/*
 * Copyright (C) 2012-2013 Xilinx
 *
 * CPU idle support for Xilinx Zynq
 *
 * based on arch/arm/mach-at91/cpuidle.c
 *
 * 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/>.
 *
 * The cpu idle uses wait-for-interrupt and RAM self refresh in order
 * to implement two idle states -
 * #1 wait-for-interrupt
 * #2 wait-for-interrupt and RAM self refresh
 *
 * Maintainer: Michal Simek <michal.simek@xilinx.com>
 */

#include <linux/init.h>
#include <linux/cpuidle.h>
#include <linux/platform_device.h>
#include <asm/cpuidle.h>


#define ZYNQ_MAX_STATES		2

/* Actual code that puts the SoC in different idle states */

static int zynq_enter_idle(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index) { /* Add code for DDR self refresh start */ cpu_do_idle(); return index; }

Contributors

PersonTokensPropCommitsCommitProp
Michal Simek26100.00%1100.00%
Total26100.00%1100.00%

static struct cpuidle_driver zynq_idle_driver = { .name = "zynq_idle", .owner = THIS_MODULE, .states = { ARM_CPUIDLE_WFI_STATE, { .enter = zynq_enter_idle, .exit_latency = 10, .target_residency = 10000, .name = "RAM_SR", .desc = "WFI and RAM Self Refresh", }, }, .safe_state_index = 0, .state_count = ZYNQ_MAX_STATES, }; /* Initialize CPU idle by registering the idle states */
static int zynq_cpuidle_probe(struct platform_device *pdev) { pr_info("Xilinx Zynq CpuIdle Driver started\n"); return cpuidle_register(&zynq_idle_driver, NULL); }

Contributors

PersonTokensPropCommitsCommitProp
Michal Simek2080.00%150.00%
Daniel Lezcano520.00%150.00%
Total25100.00%2100.00%

static struct platform_driver zynq_cpuidle_driver = { .driver = { .name = "cpuidle-zynq", }, .probe = zynq_cpuidle_probe, }; builtin_platform_driver(zynq_cpuidle_driver);

Overall Contributors

PersonTokensPropCommitsCommitProp
Michal Simek12679.75%133.33%
Daniel Lezcano3119.62%133.33%
Paul Gortmaker10.63%133.33%
Total158100.00%3100.00%
Directory: drivers/cpuidle
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