linux-kernel - Re: [PATCH 0/2] rtc: pch-rtc: add Intel Series PCH built-in read-only RTC

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Message-ID: <20210814224215.GX15173@home.paul.comp>
Date:   Sun, 15 Aug 2021 01:42:15 +0300
From:   Paul Fertser <fercerpav@...il.com>
To:     Ivan Mikhaylov <i.mikhaylov@...ro.com>
Cc:     Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        openbmc@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] rtc: pch-rtc: add Intel Series PCH built-in
 read-only RTC

On Tue, Aug 10, 2021 at 06:44:34PM +0300, Ivan Mikhaylov wrote:
> Add RTC driver with dt binding tree document. Also this driver adds one sysfs
> attribute for host power control which I think is odd for RTC driver.
> Need I cut it off and use I2C_SLAVE_FORCE? I2C_SLAVE_FORCE is not good
> way too from my point of view. Is there any better approach?

Reading the C620 datasheet I see this interface also allows other
commands (wake up, watchdog feeding, reboot etc.) and reading statuses
(e.g Intruder Detect, POWER_OK_BAD).

I think if there's any plan to use anything other but RTC via this
interface then the driver should be registered as an MFD.

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