From: Rahul Rameshbabu <sergeantsagara@protonmail.com>
To: Johannes Roith <johannes@gnu-linux.rocks>
Cc: jikos@kernel.org, andi.shyti@kernel.org,
benjamin.tissoires@redhat.com, christophe.jaillet@wanadoo.fr,
linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
rdunlap@infradead.org
Subject: Re: [PATCH v7] HID: mcp2200: added driver for GPIOs of MCP2200
Date: Fri, 22 Sep 2023 04:32:41 +0000 [thread overview]
Message-ID: <87r0mqhlp6.fsf@protonmail.com> (raw)
In-Reply-To: <20230921164928.170383-1-johannes@gnu-linux.rocks>
On Thu, 21 Sep, 2023 18:49:28 +0200 "Johannes Roith" <johannes@gnu-linux.rocks> wrote:
> Added a gpiochip compatible driver to control the 8 GPIOs of
> the MCP2200 by using the HID interface.
>
> Using GPIOs with alternative functions (GP0<->SSPND, GP1<->USBCFG,
> GP6<->RXLED, GP7<->TXLED) will reset the functions, if set (unset by
> default).
>
> The driver was tested while also using the UART of the chip. Setting
> and reading the GPIOs has no effect on the UART communication. However,
> a reset is triggered after the CONFIGURE command. If the GPIO Direction
> is constantly changed, this will affect the communication at low baud
> rates. This is a hardware problem of the MCP2200 and is not caused by
> the driver.
>
> Signed-off-by: Johannes Roith <johannes@gnu-linux.rocks>
> ---
Reviewed-by: Rahul Rameshbabu <sergeantsagara@protonmail.com>
next prev parent reply other threads:[~2023-09-22 4:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-21 16:49 [PATCH v7] HID: mcp2200: added driver for GPIOs of MCP2200 Johannes Roith
2023-09-22 4:32 ` Rahul Rameshbabu [this message]
2023-11-12 19:58 ` Johannes Roith
2023-11-21 8:28 ` Jiri Kosina
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