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| author | Samuel Morris <samorris@lexmark.com> | 2018-05-29 10:06:12 +0000 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2018-06-18 10:58:55 -0700 |
| commit | aece27a2f01be4bb7683790f69cd1bed3a0929a2 (patch) | |
| tree | 7a54d8b35b74fe7df3f2e08755c2f01ef7d5f329 /drivers/ata/ahci_platform.c | |
| parent | 332c42a9ff7f75a4d9dd263a6e5da32b45de12ec (diff) | |
| download | linux-aece27a2f01be4bb7683790f69cd1bed3a0929a2.tar.gz linux-aece27a2f01be4bb7683790f69cd1bed3a0929a2.tar.bz2 linux-aece27a2f01be4bb7683790f69cd1bed3a0929a2.zip | |
ata: ahci_platform: allow disabling of hotplug to save power
A number of resources remain powered to support hotplug. On platforms
I've worked with, allowing the ahci_platform to suspend saves about
150mW. This patch enables rpm and allows the device to be auto-suspended
through sysfs.
Signed-off-by: Samuel Morris <samorris@lexmark.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata/ahci_platform.c')
| -rw-r--r-- | drivers/ata/ahci_platform.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c index 99f9a895a459..757729376eda 100644 --- a/drivers/ata/ahci_platform.c +++ b/drivers/ata/ahci_platform.c @@ -68,8 +68,13 @@ disable_resources: return rc; } -static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend, - ahci_platform_resume); +#ifdef CONFIG_PM_SLEEP +static const struct dev_pm_ops ahci_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(ahci_platform_suspend, ahci_platform_resume) + SET_RUNTIME_PM_OPS(ahci_platform_runtime_suspend, + ahci_platform_runtime_resume, NULL) +}; +#endif static const struct of_device_id ahci_of_match[] = { { .compatible = "generic-ahci", }, @@ -98,7 +103,9 @@ static struct platform_driver ahci_driver = { .name = DRV_NAME, .of_match_table = ahci_of_match, .acpi_match_table = ahci_acpi_match, +#ifdef CONFIG_PM_SLEEP .pm = &ahci_pm_ops, +#endif }, }; module_platform_driver(ahci_driver); |