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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 ...
104 lines
2.3 KiB
C
104 lines
2.3 KiB
C
/*
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* CPU idle for DaVinci SoCs
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*
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* Copyright (C) 2009 Texas Instruments Incorporated. http://www.ti.com/
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*
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* Derived from Marvell Kirkwood CPU idle code
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* (arch/arm/mach-kirkwood/cpuidle.c)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/cpuidle.h>
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#include <linux/io.h>
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#include <linux/export.h>
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#include <asm/proc-fns.h>
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#include <asm/cpuidle.h>
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#include <mach/cpuidle.h>
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#include <mach/ddr2.h>
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#define DAVINCI_CPUIDLE_MAX_STATES 2
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static void __iomem *ddr2_reg_base;
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static bool ddr2_pdown;
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static void davinci_save_ddr_power(int enter, bool pdown)
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{
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u32 val;
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val = __raw_readl(ddr2_reg_base + DDR2_SDRCR_OFFSET);
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if (enter) {
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if (pdown)
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val |= DDR2_SRPD_BIT;
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else
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val &= ~DDR2_SRPD_BIT;
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val |= DDR2_LPMODEN_BIT;
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} else {
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val &= ~(DDR2_SRPD_BIT | DDR2_LPMODEN_BIT);
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}
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__raw_writel(val, ddr2_reg_base + DDR2_SDRCR_OFFSET);
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}
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/* Actual code that puts the SoC in different idle states */
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static int davinci_enter_idle(struct cpuidle_device *dev,
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struct cpuidle_driver *drv, int index)
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{
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davinci_save_ddr_power(1, ddr2_pdown);
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cpu_do_idle();
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davinci_save_ddr_power(0, ddr2_pdown);
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return index;
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}
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static struct cpuidle_driver davinci_idle_driver = {
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.name = "cpuidle-davinci",
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.owner = THIS_MODULE,
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.states[0] = ARM_CPUIDLE_WFI_STATE,
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.states[1] = {
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.enter = davinci_enter_idle,
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.exit_latency = 10,
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.target_residency = 10000,
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.name = "DDR SR",
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.desc = "WFI and DDR Self Refresh",
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},
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.state_count = DAVINCI_CPUIDLE_MAX_STATES,
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};
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static int __init davinci_cpuidle_probe(struct platform_device *pdev)
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{
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struct davinci_cpuidle_config *pdata = pdev->dev.platform_data;
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if (!pdata) {
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dev_err(&pdev->dev, "cannot get platform data\n");
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return -ENOENT;
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}
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ddr2_reg_base = pdata->ddr2_ctlr_base;
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ddr2_pdown = pdata->ddr2_pdown;
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return cpuidle_register(&davinci_idle_driver, NULL);
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}
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static struct platform_driver davinci_cpuidle_driver = {
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.driver = {
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.name = "cpuidle-davinci",
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},
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};
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static int __init davinci_cpuidle_init(void)
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{
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return platform_driver_probe(&davinci_cpuidle_driver,
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davinci_cpuidle_probe);
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}
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device_initcall(davinci_cpuidle_init);
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