Re: Re: [PATCH 2/2] soc: s4: Add support for power domains controller
From: Kevin Hilman <khilman@baylibre.com>
Date: 2022-02-09 20:31:03
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linux-amlogic, lkml
"shunzhou.jiang@amlogic.com" [off-list ref] writes:
Hi Kevin: Thanks your reply. Please refer to below comment,quoted
S4_VPU_HDMI: for vpu domain, this domain provide power to many moudles(osd, vpp, hdr, dv, di), if close, will cause system crash S4_USB_COMB domain: for usb, if not always on, all usb status will clear to 0, that's not right status for usb
Yes, I understand, this is teh same as for other SoCs (e.g. A1.) The solution is not to set the domain to always on. The solution is for the drivers for the devices in these domains use runtime PM so that when the drivers are active, the power domain does not get shut off.
quoted
S4_ETH: for ethernet online wakeup, and if power down, status also not right
OK, this one makes sense for "always on" since it used by firmware for wakeup. Kevin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel