On Fri, 23 May 2008, Francesco VIRLINZI wrote: > Hi all > I'm Francesco Virlinzi and I work in STMicroelectronics, I'm a > developers of STLinux (www.stlinux.com) an > embedded Linux distribution for ST Set Top Box. > > I read in the pm mail list that you are going to remove in the kernel the > dev_pm_info.power_state field in the dev_pm_info struct replaced by > bus-specific field. > > My request is: don't do that. > In embedded system it' s really useful because there are a lot of > generic IP on a single bus (the pltaform bus) > and the only way to check the power state of each IP is based on > 'dev_pm_info.power_state' > without this filed we will have our IP (platform_device) with no power > state concept... That isn't the only way to check the power state. You should have a private data structure associated with each of the devices you care about. The address of the private data structure is what you store in platform_set_drvdata(). In the private data structure you can have a field to indicate the device's power state. If the platform-bus IP really is generic then you can't possibly know what its dev_pm_info.power_state value means, anyway. Alan Stern _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
