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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-05-25 14:38:52 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-05-25 14:38:52 +0200 |
| commit | 8ce62f85a81f57e86bc120ab690facc612223188 (patch) | |
| tree | 1754f856a05e238e0b5cf30aa89e4f82b2f803b3 /drivers/acpi/acpi_lpss.c | |
| parent | a3cffce4fbafac072660648e028cc9e629b5b3c8 (diff) | |
| download | linux-8ce62f85a81f57e86bc120ab690facc612223188.tar.bz2 | |
ACPI / platform / LPSS: Enable async suspend/resume of LPSS devices
To seed up suspend and resume of devices included into Intel SoCs
handled by the ACPI LPSS driver during system suspend, make
acpi_lpss_create_device() call device_enable_async_suspend() for
every device created by it.
This requires acpi_create_platform_device() to be modified to return
a pointer to struct platform_device instead of an int. As a result,
acpi_create_platform_device() cannot be pointed to by the .attach
pointer in platform_handler directly any more, so a simple wrapper
around it is necessary for this purpose. That, in turn, allows the
second unused argument of acpi_create_platform_device() to be
dropped, which is an improvement.
Tested-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/acpi_lpss.c')
| -rw-r--r-- | drivers/acpi/acpi_lpss.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c index 69e29f409d4c..0e9c0d38b85c 100644 --- a/drivers/acpi/acpi_lpss.c +++ b/drivers/acpi/acpi_lpss.c @@ -267,12 +267,14 @@ static int acpi_lpss_create_device(struct acpi_device *adev, struct lpss_private_data *pdata; struct resource_list_entry *rentry; struct list_head resource_list; + struct platform_device *pdev; int ret; dev_desc = (struct lpss_device_desc *)id->driver_data; - if (!dev_desc) - return acpi_create_platform_device(adev, id); - + if (!dev_desc) { + pdev = acpi_create_platform_device(adev); + return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1; + } pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); if (!pdata) return -ENOMEM; @@ -322,10 +324,13 @@ static int acpi_lpss_create_device(struct acpi_device *adev, dev_desc->setup(pdata); adev->driver_data = pdata; - ret = acpi_create_platform_device(adev, id); - if (ret > 0) - return ret; + pdev = acpi_create_platform_device(adev); + if (!IS_ERR_OR_NULL(pdev)) { + device_enable_async_suspend(&pdev->dev); + return 1; + } + ret = PTR_ERR(pdev); adev->driver_data = NULL; err_out: |