From: Arnd Bergmann <arnd@arndb.de>
To: linux-arm-kernel@lists.infradead.org
Cc: Hoan Tran <hotran@apm.com>,
linux-hwmon@vger.kernel.org, Jonathan Corbet <corbet@lwn.net>,
Jean Delvare <jdelvare@suse.com>,
Ashwin Chaugule <ashwin.chaugule@linaro.org>,
Duc Dang <dhdang@apm.com>, Jassi Brar <jassisinghbrar@gmail.com>,
linux-doc@vger.kernel.org, lkml <linux-kernel@vger.kernel.org>,
Devicetree List <devicetree@vger.kernel.org>,
Rob Herring <robh+dt@kernel.org>, Loc Ho <lho@apm.com>,
Guenter Roeck <linux@roeck-us.net>
Subject: Re: [PATCH] hwmon: xgene: access mailbox as RAM
Date: Fri, 09 Sep 2016 22:50:43 +0200 [thread overview]
Message-ID: <6198994.YhDCC7xNAM@wuerfel> (raw)
In-Reply-To: <CAFHUOYyGf0MFtDrYaAMSRjZ5hJ4yxV6wSa3BpGF73tyC6GQBxw@mail.gmail.com>
On Friday, September 9, 2016 1:43:17 PM CEST Hoan Tran wrote:
>
> > * Are you sure you don't need any smp_rmb()/smp_wmb() barriers
> > between the accesses?
>
> No, we don't need a strict read/write during access PCC subspace. Just
> make sure all access is committed before PCC send message to the
> platform which done by PCC mailbox driver.
>
Ok, got it. The PCC mailbox driver presumably uses writel() to
send the message, and that implies the necessary barrier
(unlike writel_relaxed), right?
Arnd
next prev parent reply other threads:[~2016-09-09 20:52 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-21 20:55 [PATCH v3 0/3] hwmon: xgene: Add support for X-Gene hwmon driver Hoan Tran
2016-07-21 20:55 ` [PATCH v3 1/3] Documentation: dtb: xgene: Add hwmon dts binding documentation Hoan Tran
2016-07-21 22:02 ` Guenter Roeck
2016-07-21 20:55 ` [PATCH v3 2/3] hwmon: xgene: Add hwmon driver Hoan Tran
2016-07-21 22:09 ` Guenter Roeck
2016-07-21 22:21 ` Hoan Tran
2016-08-01 13:21 ` kbuild test robot
2016-08-01 16:39 ` Hoan Tran
2016-09-07 21:41 ` Arnd Bergmann
2016-09-07 22:27 ` Guenter Roeck
2016-09-08 8:15 ` Arnd Bergmann
2016-09-08 14:55 ` Guenter Roeck
2016-09-08 14:59 ` Arnd Bergmann
2016-09-07 22:37 ` Guenter Roeck
2016-09-08 8:14 ` Arnd Bergmann
2016-09-08 10:47 ` James Morse
2016-09-09 3:18 ` AKASHI Takahiro
2016-09-09 9:31 ` James Morse
2016-09-09 15:38 ` Arnd Bergmann
2016-09-09 15:38 ` [PATCH] hwmon: xgene: access mailbox as RAM Arnd Bergmann
2016-09-09 16:58 ` Guenter Roeck
2016-09-09 17:05 ` Hoan Tran
2016-09-09 19:24 ` Hoan Tran
2016-09-09 19:58 ` Arnd Bergmann
2016-09-09 20:10 ` [PATCH v2] " Arnd Bergmann
2016-09-09 20:47 ` Hoan Tran
2016-09-09 21:56 ` Guenter Roeck
2016-09-09 20:43 ` [PATCH] " Hoan Tran
2016-09-09 20:50 ` Arnd Bergmann [this message]
2016-09-09 20:51 ` Hoan Tran
2016-07-21 20:55 ` [PATCH v3 3/3] arm64: dts: apm: Add X-Gene SoC hwmon to device tree Hoan Tran
2016-07-21 22:09 ` Guenter Roeck
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