e6b5be2be4
Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEABECAAYFAlSOD20ACgkQMUfUDdst+ylLPACg2QrW1oHhdTMT9WI8jihlHVRM 53kAoLeteByQ3iVwWurwwseRPiWa8+MI =OVRS -----END PGP SIGNATURE----- Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core update from Greg KH: "Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while" * tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits) Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries" fs: debugfs: add forward declaration for struct device type firmware class: Deletion of an unnecessary check before the function call "vunmap" firmware loader: fix hung task warning dump devcoredump: provide a one-way disable function device: Add dev_<level>_once variants ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries ath: use seq_file api for ath9k debugfs files debugfs: add helper function to create device related seq_file drivers/base: cacheinfo: remove noisy error boot message Revert "core: platform: add warning if driver has no owner" drivers: base: support cpu cache information interface to userspace via sysfs drivers: base: add cpu_device_create to support per-cpu devices topology: replace custom attribute macros with standard DEVICE_ATTR* cpumask: factor out show_cpumap into separate helper function driver core: Fix unbalanced device reference in drivers_probe driver core: fix race with userland in device_add() sysfs/kernfs: make read requests on pre-alloc files use the buffer. sysfs/kernfs: allow attributes to request write buffer be pre-allocated. fs: sysfs: return EGBIG on write if offset is larger than file size ...
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
/*
|
|
* 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/proc-fns.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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static struct platform_driver zynq_cpuidle_driver = {
|
|
.driver = {
|
|
.name = "cpuidle-zynq",
|
|
},
|
|
.probe = zynq_cpuidle_probe,
|
|
};
|
|
|
|
module_platform_driver(zynq_cpuidle_driver);
|