From: Rob Herring <robh@kernel.org>
To: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Cc: pawel.moll@arm.com, mark.rutland@arm.com,
ijc+devicetree@hellion.org.uk, galak@codeaurora.org,
myungjoo.ham@samsung.com, cw00.choi@samsung.com,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-sh@vger.kernel.org, linux-usb@vger.kernel.org
Subject: Re: [PATCH v4] extcon: add Maxim MAX3355 driver
Date: Fri, 18 Dec 2015 22:17:14 -0600 [thread overview]
Message-ID: <20151219041714.GB14936@rob-hp-laptop> (raw)
In-Reply-To: <1767472.2Rx4LOCrWY@wasted.cogentembedded.com>
On Fri, Dec 18, 2015 at 01:47:14AM +0300, Sergei Shtylyov wrote:
> Maxim Integrated MAX3355E chip integrates a charge pump and comparators to
> enable a system with an integrated USB OTG dual-role transceiver to
> function as an USB OTG dual-role device. In addition to sensing/controlling
> Vbus, the chip also passes thru the ID signal from the USB OTG connector.
> On some Renesas boards, this signal is just fed into the SoC thru a GPIO
> pin -- there's no real OTG controller, only host and gadget USB controllers
> sharing the same USB bus; however, we'd like to allow host or gadget
> drivers to be loaded depending on the cable type, hence the need for the
> MAX3355 extcon driver. The Vbus status signals are also wired to GPIOs
> (however, we aren't currently interested in them), the OFFVBUS# signal is
> controlled by the host controllers, there's also the SHDN# signal wired to
> a GPIO, it should be driven high for the normal operation.
>
> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
>
> ---
> The patch is against the 'extcon-next' branch of the 'extcon.git' repo.
>
> Changes in version 4:
> - stopped calling kstrdup() for the device name;
> - removed unneeded 'owner' field initializer;
> - moved devm_extcon_allocate() call further down in the probe() method;
> - extended the driver copyright;
> - indented the continuation lines in the binding document.
>
> Changes in version 3:
> - reformatted the change log.
>
> Changes in version 2:
> - added the USB gadget cable support;
> - added the remove() driver method which drives SHDN# GPIO low to save power;
> - dropped vendor prefix from the ID GPIO property name;
> - changed the GPIO property name suffix to "-gpios";
> - switched to usign extcon_set_cable_state_() API;
> - switched to using the gpiod/sleeping 'gpiolib' APIs;
> - addded error messages to max3355_probe();
> - added IRQF_NO_SUSPEND flasg to the devm_request_threaded_irq() call;
> - renamed 'ret' variable to 'err' in max3355_probe();
> - expanded the Kconfig entry help text;
> - added vendor name to the patch summary, the bindings document, the Kconfig
> entry, the driver heading comment, the module description, and the change log;
> - fixed up and reformatted the change log.
>
> Documentation/devicetree/bindings/extcon/extcon-max3355.txt | 21 +
Acked-by: Rob Herring <robh@kernel.org>
> drivers/extcon/Kconfig | 8
> drivers/extcon/Makefile | 1
> drivers/extcon/extcon-max3355.c | 151 ++++++++++++
> 4 files changed, 181 insertions(+)
prev parent reply other threads:[~2015-12-19 4:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-17 22:47 [PATCH v4] extcon: add Maxim MAX3355 driver Sergei Shtylyov
2015-12-18 1:14 ` Chanwoo Choi
2015-12-18 14:33 ` Sergei Shtylyov
2015-12-19 4:17 ` Rob Herring [this message]
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