From: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
To: Lee Jones <lee.jones@linaro.org>
Cc: Vladimir Zapolskiy <vz@mleia.com>,
Linus Walleij <linus.walleij@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Marek Vasut <marek.vasut@gmail.com>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Wolfram Sang <wsa@the-dreams.de>, <devicetree@vger.kernel.org>,
<linux-gpio@vger.kernel.org>, <linux-media@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 5/7] mfd: ds90ux9xx: add I2C bridge/alias and link connection driver
Date: Fri, 12 Oct 2018 10:32:32 +0300 [thread overview]
Message-ID: <c8f01b88-c14f-867d-d796-7464b2e8ccfb@mentor.com> (raw)
In-Reply-To: <20181012060455.GV4939@dell>
Hi Lee,
On 10/12/2018 09:04 AM, Lee Jones wrote:
> On Tue, 09 Oct 2018, Vladimir Zapolskiy wrote:
>
>> From: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
>>
>> The change adds TI DS90Ux9xx I2C bridge/alias subdevice driver and
>> FPD Link connection handling mechanism.
>>
>> Access to I2C devices connected to a remote de-/serializer is done in
>> a transparent way, on established link detection event such devices
>> are registered on an I2C bus, which serves a local de-/serializer IC.
>>
>> The development of the driver was a collaborative work, the
>> contribution done by Balasubramani Vivekanandan includes:
>> * original simplistic implementation of the driver,
>> * support of implicitly specified devices in device tree,
>> * support of multiple FPD links for TI DS90Ux9xx,
>> * other kind of valuable review comments, clean-ups and fixes.
>>
>> Also Steve Longerbeam made the following changes:
>> * clear address maps after linked device removal,
>> * disable pass-through in disconnection,
>> * qualify locked status with non-zero remote address.
>>
>> Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
>> ---
>> drivers/mfd/Kconfig | 8 +
>> drivers/mfd/Makefile | 1 +
>> drivers/mfd/ds90ux9xx-i2c-bridge.c | 764 +++++++++++++++++++++++++++++
>> 3 files changed, 773 insertions(+)
>> create mode 100644 drivers/mfd/ds90ux9xx-i2c-bridge.c
>
> Shouldn't this live in drivers/i2c?
no, the driver is not for an I2C controller of any kind, and the driver does
not register itself in the I2C subsystem by calling i2c_add_adapter() or
i2c_add_numbered_adapter() or i2c_mux_add_adapter() etc, this topic was
discussed with Wolfram also.
Formally the driver converts the managed IC into a multi-address I2C
slave device, I understand that it does not sound like a well suited driver
for MFD, but ds90ux9xx-core.c and ds90ux9xx-i2c-bridge.c drivers are quite
tightly coupled.
--
Best wishes,
Vladimir
next prev parent reply other threads:[~2018-10-12 7:32 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-08 21:11 [PATCH 0/7] mfd/pinctrl: add initial support of TI DS90Ux9xx ICs Vladimir Zapolskiy
2018-10-08 21:11 ` [PATCH 1/7] dt-bindings: mfd: ds90ux9xx: add description " Vladimir Zapolskiy
2018-10-09 0:13 ` Marek Vasut
2018-10-09 11:11 ` Vladimir Zapolskiy
2018-10-09 20:55 ` Vladimir Zapolskiy
2018-10-09 21:03 ` Marek Vasut
2018-10-10 8:41 ` Linus Walleij
2018-10-12 11:44 ` Laurent Pinchart
2018-10-13 14:28 ` Vladimir Zapolskiy
2018-10-16 12:30 ` Laurent Pinchart
2018-10-30 16:43 ` Luca Ceresoli
2018-10-30 23:40 ` Vladimir Zapolskiy
2018-10-08 21:12 ` [PATCH 2/7] dt-bindings: mfd: ds90ux9xx: add description of TI DS90Ux9xx I2C bridge Vladimir Zapolskiy
2018-10-12 11:54 ` Laurent Pinchart
2018-10-30 16:43 ` Luca Ceresoli
2018-10-31 20:12 ` Vladimir Zapolskiy
2018-11-03 21:00 ` Luca Ceresoli
2018-11-03 22:07 ` Vladimir Zapolskiy
2018-10-08 21:12 ` [PATCH 3/7] dt-bindings: pinctrl: ds90ux9xx: add description of TI DS90Ux9xx pinmux Vladimir Zapolskiy
2018-10-10 8:45 ` Linus Walleij
2018-10-17 15:02 ` Rob Herring
2018-10-12 12:01 ` Laurent Pinchart
2018-10-13 13:47 ` Vladimir Zapolskiy
2018-10-16 12:48 ` Laurent Pinchart
2018-10-30 16:44 ` Luca Ceresoli
2018-10-31 20:31 ` Vladimir Zapolskiy
2018-10-08 21:12 ` [PATCH 4/7] mfd: ds90ux9xx: add TI DS90Ux9xx de-/serializer MFD driver Vladimir Zapolskiy
2018-10-09 4:08 ` kbuild test robot
2018-10-09 11:14 ` Vladimir Zapolskiy
2018-10-12 6:03 ` Lee Jones
2018-10-12 7:41 ` Vladimir Zapolskiy
2018-10-12 8:39 ` Lee Jones
2018-10-12 9:20 ` Kieran Bingham
2018-10-12 10:58 ` Vladimir Zapolskiy
2018-10-12 11:34 ` Lee Jones
2018-10-12 14:13 ` Vladimir Zapolskiy
2018-10-12 14:25 ` Lee Jones
2018-10-12 11:47 ` Kieran Bingham
2018-10-12 13:01 ` Laurent Pinchart
2018-10-12 13:59 ` Vladimir Zapolskiy
2018-10-16 13:08 ` Laurent Pinchart
2018-10-23 8:16 ` Vladimir Zapolskiy
2018-10-30 16:44 ` Luca Ceresoli
2018-10-13 15:10 ` Vladimir Zapolskiy
2018-10-16 13:12 ` Laurent Pinchart
2018-10-16 18:32 ` Vladimir Zapolskiy
2018-10-13 12:33 ` Vladimir Zapolskiy
2018-10-12 11:24 ` Vladimir Zapolskiy
2018-10-12 11:43 ` Lee Jones
2018-10-12 14:23 ` Vladimir Zapolskiy
2018-10-12 13:07 ` Laurent Pinchart
2018-10-08 21:12 ` [PATCH 5/7] mfd: ds90ux9xx: add I2C bridge/alias and link connection driver Vladimir Zapolskiy
2018-10-12 6:04 ` Lee Jones
2018-10-12 7:32 ` Vladimir Zapolskiy [this message]
2018-10-12 9:03 ` Lee Jones
2018-10-12 13:12 ` Laurent Pinchart
2018-10-12 14:36 ` Vladimir Zapolskiy
2018-10-16 14:06 ` Laurent Pinchart
2018-10-08 21:12 ` [PATCH 6/7] pinctrl: ds90ux9xx: add TI DS90Ux9xx pinmux and GPIO controller driver Vladimir Zapolskiy
2018-10-10 9:04 ` Linus Walleij
2018-10-08 21:12 ` [PATCH 7/7] MAINTAINERS: add entry for TI DS90Ux9xx FPD-Link III drivers Vladimir Zapolskiy
2018-10-12 11:34 ` [PATCH 0/7] mfd/pinctrl: add initial support of TI DS90Ux9xx ICs Laurent Pinchart
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