From: Guenter Roeck <linux@roeck-us.net>
To: Julius Werner <jwerner@chromium.org>
Cc: Xingyu Chen <xingyu.chen@amlogic.com>,
Evan Benn <evanbenn@chromium.org>, 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: Fri, 21 Feb 2020 12:46:58 -0800 [thread overview]
Message-ID: <20200221204658.GA6074@roeck-us.net> (raw)
In-Reply-To: <CAODwPW94KX46PzSrf_uuEFPKudXor=26d=g3Qta5veRfxmMDUA@mail.gmail.com>
On Fri, Feb 21, 2020 at 11:41:47AM -0800, Julius Werner wrote:
> > Because the ATF does not define standard wdt index, each vendor defines
> > its own index.
> > So I don't think that the current driver[0] can fully cover my usecases.
>
> I think the best way to solve this would be to put the SMC function ID
> as another field into the device tree, so that multiple vendors could
> share the same driver even if their firmware interface uses a
> different SMC. But they still have to implement the same API for that
> SMC, of course, not sure if the Meson driver is suitable for that (but
> if it is then I think merging those drivers would be a good idea).
More common would be to have a single driver and multiple compatible
strings. The driver would then pick the SMC function ID from the compatible
string. After all, we'd not only need the SMC function ID; parameters
are also different.
Guenter
next prev parent reply other threads:[~2020-02-21 20:47 UTC|newest]
Thread overview: 36+ 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 ` 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 [this message]
2020-02-22 4:01 ` Xingyu Chen
2020-02-24 1:10 ` Evan Benn
2020-02-25 1:23 ` Julius Werner
2020-02-25 7:44 ` Xingyu Chen
2020-02-25 7:44 ` Xingyu Chen
2020-03-10 1:00 ` Evan Benn
2020-03-10 1:00 ` Evan Benn
[not found] ` <ad28aa47-0490-937f-898f-0e4695ef6ec6@amlogic.com>
2020-03-11 19:24 ` Julius Werner
2020-03-11 19:24 ` Julius Werner
2020-03-13 16:13 ` Xingyu Chen
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 6:26 ` Evan Benn
2020-02-14 9:35 ` Enric Balletbo Serra
2020-02-14 9:35 ` Enric Balletbo Serra
2020-02-14 14:10 ` Guenter Roeck
2020-02-14 14:10 ` Guenter Roeck
2020-02-14 21:32 ` Julius Werner
2020-02-14 21:32 ` Julius Werner
2020-02-15 1:39 ` Evan Benn
2020-02-15 1:39 ` Evan Benn
2020-02-20 6:50 ` Evan Benn
2020-02-20 6:50 ` Evan Benn
2020-02-20 15:52 ` Guenter Roeck
2020-02-20 15:52 ` Guenter Roeck
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