From: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
To: Lee Jones <lee.jones@linaro.org>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Vladimir Zapolskiy <vz@mleia.com>,
Linus Walleij <linus.walleij@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Marek Vasut <marek.vasut@gmail.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 4/7] mfd: ds90ux9xx: add TI DS90Ux9xx de-/serializer MFD driver
Date: Fri, 12 Oct 2018 10:41:20 +0300 [thread overview]
Message-ID: <63733d2e-f95e-8894-f2b0-0b551b5cfeeb@mentor.com> (raw)
In-Reply-To: <20181012060314.GU4939@dell>
Hi Lee,
On 10/12/2018 09:03 AM, Lee Jones wrote:
> On Tue, 09 Oct 2018, Vladimir Zapolskiy wrote:
>
>> From: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
>>
>> The change adds I2C device driver for TI DS90Ux9xx de-/serializers,
>> support of subdevice controllers is done in separate drivers, because
>> not all IC functionality may be needed in particular situations, and
>> this can be fine grained controlled in device tree.
>>
>> The development of the driver was a collaborative work, the
>> contribution done by Balasubramani Vivekanandan includes:
>> * original implementation of the driver based on a reference driver,
>> * regmap powered interrupt controller support on serializers,
>> * support of implicitly or improperly specified in device tree ICs,
>> * support of device properties and attributes: backward compatible
>> mode, low frequency operation mode, spread spectrum clock generator.
>>
>> Contribution by Steve Longerbeam:
>> * added ds90ux9xx_read_indirect() function,
>> * moved number of links property and added ds90ux9xx_num_fpd_links(),
>> * moved and updated ds90ux9xx_get_link_status() function to core driver,
>> * added fpd_link_show device attribute.
>>
>> Sandeep Jain added support of pixel clock edge configuration.
>>
>> Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
>> ---
>> drivers/mfd/Kconfig | 14 +
>> drivers/mfd/Makefile | 1 +
>> drivers/mfd/ds90ux9xx-core.c | 879 ++++++++++++++++++++++++++++++++++
>> include/linux/mfd/ds90ux9xx.h | 42 ++
>> 4 files changed, 936 insertions(+)
>> create mode 100644 drivers/mfd/ds90ux9xx-core.c
>> create mode 100644 include/linux/mfd/ds90ux9xx.h
>>
>> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
>> index 8c5dfdce4326..a969fa123f64 100644
>> --- a/drivers/mfd/Kconfig
>> +++ b/drivers/mfd/Kconfig
>> @@ -1280,6 +1280,20 @@ config MFD_DM355EVM_MSP
>> boards. MSP430 firmware manages resets and power sequencing,
>> inputs from buttons and the IR remote, LEDs, an RTC, and more.
>>
>> +config MFD_DS90UX9XX
>> + tristate "TI DS90Ux9xx FPD-Link de-/serializer driver"
>> + depends on I2C && OF
>> + select MFD_CORE
>> + select REGMAP_I2C
>> + help
>> + Say yes here to enable support for TI DS90UX9XX de-/serializer ICs.
>> +
>> + This driver provides basic support for setting up the de-/serializer
>> + chips. Additional functionalities like connection handling to
>> + remote de-/serializers, I2C bridging, pin multiplexing, GPIO
>> + controller and so on are provided by separate drivers and should
>> + enabled individually.
>
> This is not an MFD driver.
Why do you think so? The representation of the ICs into device tree format
of hardware description shows that this is a truly MFD driver with multiple
IP subcomponents naturally mapped into MFD cells.
Basically it is possible to replace explicit of_platform_populate() by
adding a "simple-mfd" compatible, if it is desired.
> After a 30 second Google of what this device actually does, perhaps
> drivers/media might be a better fit?
>
I assume it would be quite unusual to add a driver with NO media functions
and controls into drivers/media.
Laurent, can you please share your opinion?
--
Best wishes,
Vladimir
next prev parent reply other threads:[~2018-10-12 7:41 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 [this message]
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
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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