From: Alexandre Belloni <alexandre.belloni@bootlin.com>
To: Anson Huang <anson.huang@nxp.com>
Cc: "Lothar Wa��mann" <LW@KARO-electronics.de>,
"a.zummo@towertech.it" <a.zummo@towertech.it>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
"will.deacon@arm.com" <will.deacon@arm.com>,
"Aisheng DONG" <aisheng.dong@nxp.com>,
"Andy Gross" <andy.gross@linaro.org>,
"arnd@arndb.de" <arnd@arndb.de>,
"horms+renesas@verge.net.au" <horms+renesas@verge.net.au>,
"heiko@sntech.de" <heiko@sntech.de>,
"bjorn.andersson@linaro.org" <bjorn.andersson@linaro.org>,
"enric.balletbo@collabora.com" <enric.balletbo@collabora.com>,
"amit.kucheria@linaro.org" <amit.kucheria@linaro.org>,
"ezequiel@collabora.com" <ezequiel@collabora.com>,
"olof@lixom.net" <olof@lixom.net>
Subject: Re: [PATCH 4/4] ARM64: dts: imx: add i.MX8QXP system controller RTC support
Date: Wed, 28 Nov 2018 10:58:23 +0100 [thread overview]
Message-ID: <20181128095823.GE8952@piout.net> (raw)
In-Reply-To: <DB3PR0402MB3916DE94D437DC51435D00CEF5D10@DB3PR0402MB3916.eurprd04.prod.outlook.com>
On 28/11/2018 09:41:22+0000, Anson Huang wrote:
> > > i.MX SoCs ONLY have 1 RTC. And RTC are always enabled by default for
> > > all i.MX SoCs, so do we have to disable it here and enable it in board dts?
> > >
> >
> > I would say that most of the i.MX based boards include another RTC because
> > the SoC one consumes way too much power.
> >
> > Note that I don't care too much whether it is enabled by default, I was simply
> > explaining why you may want to disable it by default.
>
> OK, this system controller RTC is a little different, it is controlled by system controller firmware,
> and system controller firmware will always select the best one for its user(Linux kernel) if there are other
> RTCs available, so I think we can keep it enabled by default for now. Thanks.
>
Do you mean that the plan is to push support for the external RTCs (e.g.
the i2c ones) to the M4 firmware?
--
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
next prev parent reply other threads:[~2018-11-28 9:58 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-27 9:41 [PATCH 0/4] Add i.MX system controller RTC driver Anson Huang
2018-11-27 9:41 ` [PATCH 1/4] rtc: add i.MX system controller RTC support Anson Huang
2018-11-27 9:41 ` Anson Huang
2018-11-27 21:35 ` Alexandre Belloni
2018-11-27 9:41 ` [PATCH 2/4] dt-bindings: rtc: add binding doc for i.MX system controller RTC driver Anson Huang
2018-11-27 21:26 ` Alexandre Belloni
2018-11-27 9:41 ` Anson Huang
2018-11-27 9:41 ` [PATCH 3/4] defconfig: arm64: add i.MX system controller RTC support Anson Huang
2018-11-27 9:41 ` Anson Huang
2018-11-27 21:36 ` Alexandre Belloni
2018-11-27 9:41 ` [PATCH 4/4] ARM64: dts: imx: add i.MX8QXP " Anson Huang
2018-11-27 9:41 ` Anson Huang
2018-11-28 9:04 ` Lothar Waßmann
2018-11-28 9:06 ` Anson Huang
2018-11-28 9:12 ` Lothar Waßmann
2018-11-28 9:20 ` Anson Huang
2018-11-28 9:19 ` Alexandre Belloni
2018-11-28 9:21 ` Anson Huang
2018-11-28 9:33 ` Alexandre Belloni
2018-11-28 9:41 ` Anson Huang
2018-11-28 9:58 ` Alexandre Belloni [this message]
2018-11-28 10:03 ` Anson Huang
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