On Wed, 1 Nov 2023 at 11:08, Abel Vesa <abel.vesa@xxxxxxxxxx> wrote: > > From: Ulf Hansson <ulf.hansson@xxxxxxxxxx> > > Some power-domains may be capable of relying on the HW to control the power > for a device that's hooked up to it. Typically, for these kinds of > configurations the device doesn't really need to be attached to a PM domain > (genpd), from Linux point of view. However, in some cases the behaviour of > the power-domain and its device can be changed in runtime. > > To allow a consumer driver to change the behaviour of the PM domain for its > device, let's provide a new function, dev_pm_genpd_set_hwmode(). Moreover, > let's add a corresponding optional genpd callback, ->set_hwmode_dev(), > which the genpd provider should implement if it can support switching > between HW controlled mode and SW controlled mode. Similarly, add the > dev_pm_genpd_get_hwmode() to allow consumers to read the current mode and > its corresponding optional genpd callback, ->get_hwmode_dev(), which the > genpd provider can also implement for reading back the mode from the > hardware. > > Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> > Signed-off-by: Abel Vesa <abel.vesa@xxxxxxxxxx> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> -- With best wishes Dmitry
