On 10/19/18 11:45 AM, Joakim Zhang wrote: > From: Dong Aisheng <aisheng.dong@xxxxxxx> > > Flexcan will be disabled during suspend if no wakeup function required > and enabled after resume accordingly. During this period, we could > explicitly disable clocks. > > Implement Runtime PM which will: > 1) Keep device in suspend state (clocks disabled) if it's not openned > 2) Make Power Domain framework be able to shutdown the corresponding power > domain of this device. Without CONFIG_PM the device fails to probe: > [ 214.420606] flexcan 2090000.flexcan: 2090000.flexcan supply xceiver not found, using dummy regulator > [ 214.445952] flexcan 2090000.flexcan: Linked as a consumer to regulator.0 > [ 214.453448] flexcan 2090000.flexcan: registering netdev failed > [ 214.459666] flexcan 2090000.flexcan: Dropping the link to regulator.0 > [ 214.472066] flexcan: probe of 2090000.flexcan failed with error -110 Marc -- Pengutronix e.K. | Marc Kleine-Budde | Industrial Linux Solutions | Phone: +49-231-2826-924 | Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
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