On 08/04/2018 04:00 PM, Andy Shevchenko wrote: > On Sat, Aug 4, 2018 at 2:57 AM, Grygorii Strashko > <grygorii.strashko@xxxxxx> wrote: > > >> But ... PM operation can involve many devices :( pmic, gpio, i2c-muxes, regulators, so >> such flag will just spread all over the kernel. >> >> Another, options is to mark i2c devices in DT, but that might not go as SW specific. >> >>> >>> Or? > > Can't we use device links for that? > > IIUC, Rafael specifically introduced them to alllow independednt > devices to be link in a chain from PM wise prospective. > it's not about shutdown sequence, so device links wouldn't help. It's about making some i2c bus + set of selected i2c devices working during very late shutdown stages (irqs disabled) and block (or warn) any other i2c devices. -- regards, -grygorii
