From: Sudeep Holla <sudeep.holla@arm.com>
To: Jacky Bai <ping.bai@nxp.com>
Cc: Aisheng Dong <aisheng.dong@nxp.com>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"festevam@gmail.com" <festevam@gmail.com>,
"s.hauer@pengutronix.de" <s.hauer@pengutronix.de>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
dl-linux-imx <linux-imx@nxp.com>,
"kernel@pengutronix.de" <kernel@pengutronix.de>,
Sudeep Holla <sudeep.holla@arm.com>,
"shawnguo@kernel.org" <shawnguo@kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Lucas Stach <l.stach@pengutronix.de>
Subject: Re: [PATCH 0/3] Add power domain driver support for i.mx8m family
Date: Wed, 17 Apr 2019 15:43:20 +0100 [thread overview]
Message-ID: <20190417144309.GA21117@e107155-lin> (raw)
In-Reply-To: <VI1PR0402MB3519F2EBBDB8DAB002EAAA2E87250@VI1PR0402MB3519.eurprd04.prod.outlook.com>
On Wed, Apr 17, 2019 at 02:30:53PM +0000, Jacky Bai wrote:
>
> Hi Lucas,
>
> Either SCMI or SCPI, I think it is initially designed for SOC that has
> dedicated SCP to manage the SOC resource, but for i.MX8M, we don't have such
> support. so just for the power domain support, do you have other suggestion
> for it.
>
I disagree, I thought it was clear from my earlier email. All OSPM like
Linux kernel cares is conformance to the interface. And SCMI/SCPI kind
of interface doesn't mandate how to implement either at the hardware
(you may or may not have dedicated processor) or software level(can do
it in TF-A through SMC, or some remote process through mailbox)
I am clearly against the custom SMC:
1. It will never end and it's put together without much design thoughts
just to address specific need of the hour.
2. It gets obsolete very soon, mainly because of (1)
3. Very platform and vendor specific and soon we will find ourselves
in ocean of such custom calls
And I can definitely continue the list, but I have made the point.
I think we already have enough of those custom SMC already now and it's
high time to stop that non-sense for OSPM.
--
Regards,
Sudeep
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next parent reply other threads:[~2019-04-17 14:43 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <VI1PR0402MB3519F2EBBDB8DAB002EAAA2E87250@VI1PR0402MB3519.eurprd04.prod.outlook.com>
2019-04-17 14:43 ` Sudeep Holla [this message]
[not found] <AM0PR04MB44812EBB23214A5892C3E04C88200@AM0PR04MB4481.eurprd04.prod.outlook.com>
2019-04-23 11:07 ` [PATCH 0/3] Add power domain driver support for i.mx8m family Sudeep Holla
2019-04-23 14:02 ` Peng Fan
2019-04-17 5:27 Jacky Bai
2019-04-17 11:16 ` Aisheng Dong
2019-04-17 12:13 ` Lucas Stach
2019-04-17 12:40 ` Leonard Crestez
2019-04-17 12:54 ` Lucas Stach
2019-04-17 13:25 ` Sudeep Holla
2019-04-17 12:54 ` Peng Fan
2019-04-17 13:33 ` Sudeep Holla
2019-04-17 16:21 ` Leonard Crestez
2019-04-18 14:43 ` Sudeep Holla
2019-11-07 21:28 ` Adam Ford
2020-02-13 9:16 ` Schrempf Frieder
2020-02-13 9:21 ` Jacky Bai
2020-02-13 10:52 ` Schrempf Frieder
2020-02-13 11:32 ` Lucas Stach
2020-02-13 14:30 ` Leonard Crestez
2020-02-13 14:47 ` Lucas Stach
2020-02-13 15:19 ` Leonard Crestez
2020-02-13 15:58 ` Lucas Stach
2020-02-13 16:16 ` Schrempf Frieder
2019-04-17 13:23 ` Sudeep Holla
2019-04-17 13:36 ` Sudeep Holla
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