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From: Julius Werner <jwerner@chromium.org>
To: Xingyu Chen <xingyu.chen@amlogic.com>
Cc: Julius Werner <jwerner@chromium.org>,
	Evan Benn <evanbenn@chromium.org>,
	Guenter Roeck <linux@roeck-us.net>, Rob Herring <robh@kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	devicetree@vger.kernel.org,
	"David S. Miller" <davem@davemloft.net>,
	Jonathan Cameron <Jonathan.Cameron@huawei.com>,
	Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
	Wim Van Sebroeck <wim@linux-watchdog.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Mark Rutland <mark.rutland@arm.com>,
	linux-watchdog@vger.kernel.org,
	Jianxin Pan <jianxin.pan@amlogic.com>,
	Yonghui Yu <yonghui.yu@amlogic.com>
Subject: Re: [PATCH 1/2] dt-bindings: watchdog: Add arm,smc-wdt watchdog arm,smc-wdt compatible
Date: Mon, 24 Feb 2020 17:23:46 -0800
Message-ID: <CAODwPW8WwntWb_=dg2J3AMy-gHw2QvNj_g98SufN13+AuGnUSg@mail.gmail.com> (raw)
In-Reply-To: <1326f594-3cfd-c03d-4f2c-50eeb75724b2@amlogic.com>

> The SMC function ID may be solved by the DTS, but the wdt indexs(Eg:
> SMCWD_INFO) are also different
> for each vendor. The imx_sc_wdt.c is also use the SMC to operate the
> WDT, but the wdt indexs(Eg: IMX_SIP_TIMER_START_WDOG)
> are different from ours. IMO, If the ATF can implement a common hal
> interface and index for watchdog, then writing a
> common smc wdt driver will be easier to compatible with all vendors.

The MediaTek driver is still in flux (e.g. still being reviewed in
Trusted Firmware here:
https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/3405),
we can still change it. So if we can now decide on making this a
"standard" driver, we can change the MediaTek interface to match IMX
and standardize on that. (There are existing Chromebooks shipped with
a different interface, but we could handle those separately with
downstream patches. I think having a unified interface that will
prevent this problem in the future would be worth some extra
complication right now.)

  parent reply index

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-14  6:26 [PATCH 0/2] Add a watchdog driver that uses ARM Secure Monitor Calls Evan Benn
2020-02-14  6:26 ` [PATCH 1/2] dt-bindings: watchdog: Add arm,smc-wdt watchdog arm,smc-wdt compatible Evan Benn
2020-02-19 22:30   ` Rob Herring
2020-02-19 23:04     ` Julius Werner
2020-02-19 23:20       ` Guenter Roeck
2020-02-20  6:41         ` Evan Benn
2020-02-20 15:43           ` Guenter Roeck
2020-02-21 15:36           ` Xingyu Chen
2020-02-21 19:41             ` Julius Werner
2020-02-21 20:46               ` Guenter Roeck
2020-02-22  4:01               ` Xingyu Chen
2020-02-24  1:10                 ` Evan Benn
2020-02-25  1:23                 ` Julius Werner [this message]
2020-02-25  7:44                   ` Xingyu Chen
2020-03-10  1:00                     ` Evan Benn
     [not found]                       ` <ad28aa47-0490-937f-898f-0e4695ef6ec6@amlogic.com>
2020-03-11 19:24                         ` Julius Werner
2020-03-13 16:13                           ` Xingyu Chen
2020-02-14  6:26 ` [PATCH 2/2] watchdog: Add new arm_smc_wdt watchdog driver Evan Benn
2020-02-14  9:35   ` Enric Balletbo Serra
2020-02-14 14:10   ` Guenter Roeck
2020-02-14 21:32     ` Julius Werner
2020-02-15  1:39       ` Evan Benn
2020-02-20  6:50     ` Evan Benn
2020-02-20 15:52       ` Guenter Roeck

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