From: Wolfram Sang <wsa@the-dreams.de>
To: Ray Jui <ray.jui@broadcom.com>
Cc: Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
linux-i2c@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
bcm-kernel-feedback-list@broadcom.com,
Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Subject: Re: [PATCH v5 6/8] dt-bindings: i2c: iproc: add "brcm,iproc-nic-i2c" compatible string
Date: Tue, 2 Apr 2019 12:17:57 +0200 [thread overview]
Message-ID: <20190402101757.GC2960@kunai> (raw)
In-Reply-To: <0b97cacd-9bf4-135a-b2ee-1d51ab380b1c@broadcom.com>
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> Note APE is a co-processor that is not visible from the Linux running
> from the host processor.
>
> "brcm,iproc-nic-i2c" here is introduced to allow the I2C port from APE
> to be completely owned by the host CPU, to meet the requirement of
> certain use cases. At the same time, the control of the I2C port from
> APE will be disabled.
>
> The "brcm,ape-hsls-addr-mask" defines the address translation and be
> programmed into some configuration registers to allow the host to
> directly access the I2C registers of APE. Note those configuration
> registers are owned by the host, and that address is not APE's address
> space nor the host is intending to take over the control of APE.
>
> Therefore, I think it makes way more sense to use an address mask type
> of DT property here.
Thanks for the explanation! Well, since Rob is already OK with it, then
so am I.
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next prev parent reply other threads:[~2019-04-02 10:18 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-14 17:57 [PATCH v5 0/8] iProc I2C slave mode and NIC mode Ray Jui
2019-02-14 17:57 ` [PATCH v5 1/8] i2c: iproc: Extend I2C read up to 255 bytes Ray Jui
2019-03-27 22:17 ` Wolfram Sang
2019-04-01 21:35 ` Ray Jui
2019-02-14 17:57 ` [PATCH v5 2/8] i2c: iproc: Add slave mode support Ray Jui
2019-03-27 22:14 ` Wolfram Sang
2019-03-27 22:41 ` Wolfram Sang
2019-04-01 21:33 ` Ray Jui
2019-04-02 8:24 ` Rayagonda Kokatanur
2019-04-02 9:01 ` Wolfram Sang
2019-02-14 17:57 ` [PATCH v5 3/8] dt-bindings: i2c: iproc: make 'interrupts' optional Ray Jui
2019-02-14 22:25 ` Rob Herring
2019-02-14 17:57 ` [PATCH v5 4/8] i2c: iproc: add polling support Ray Jui
2019-02-14 17:57 ` [PATCH v5 5/8] i2c: iproc: use wrapper for read/write access Ray Jui
2019-02-14 17:57 ` [PATCH v5 6/8] dt-bindings: i2c: iproc: add "brcm,iproc-nic-i2c" compatible string Ray Jui
2019-02-14 22:26 ` Rob Herring
2019-03-27 22:24 ` Wolfram Sang
2019-04-01 21:43 ` Ray Jui
2019-04-02 10:17 ` Wolfram Sang [this message]
2019-02-14 17:57 ` [PATCH v5 7/8] i2c: iproc: add NIC I2C support Ray Jui
2019-04-02 10:27 ` Wolfram Sang
2019-04-02 17:57 ` Ray Jui
2019-04-03 1:10 ` Ray Jui
2019-02-14 17:57 ` [PATCH v5 8/8] arm64: dts: Stingray: Add NIC i2c device node Ray Jui
2019-02-22 20:04 ` [PATCH v5 0/8] iProc I2C slave mode and NIC mode Ray Jui
2019-03-22 16:40 ` Florian Fainelli
2019-03-27 22:27 ` Wolfram Sang
2019-04-01 21:44 ` Ray Jui
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