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authorMika Westerberg <mika.westerberg@linux.intel.com>2013-10-10 14:28:48 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-10-11 04:23:14 +0400
commit33cf00e5708290f7e57d949219ef443a2aef34e0 (patch)
tree9099e5cc31154c90472b2afbeaf72e3df786d309 /drivers/acpi
parenta76e9bd89ae70fdfff5fd1ca47756a35d10c5f3f (diff)
downloadlinux-33cf00e5708290f7e57d949219ef443a2aef34e0.tar.xz
spi: attach/detach SPI device to the ACPI power domain
If the SPI device is enumerated from ACPI namespace (it has an ACPI handle) it might have ACPI methods that needs to be called in order to transition the device to different power states (such as _PSx). We follow what has been done for platform and I2C buses here and attach the SPI device to the ACPI power domain if the device has an ACPI handle. This makes sure that the device is powered on when its ->probe() is called. For non-ACPI devices this patch is a no-op. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Mark Brown <broonie@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
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