From: George Hilliard <ghilliard@kopismobile.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: George Hilliard <ghilliard@kopismobile.com>,
NXP Linux Team <linux-imx@nxp.com>,
linux-serial@vger.kernel.org, devicetree@vger.kernel.org,
kernel@pengutronix.de
Subject: [PATCH v2 0/2] Implement support for inverted serial TX/RX on i.MX
Date: Mon, 10 Feb 2020 13:29:47 -0600 [thread overview]
Message-ID: <20200210192949.7338-1-ghilliard@kopismobile.com> (raw)
This peripheral has dedicated control bits that flip input/output
signals before handing them off to the OS. This is useful on my
hardware because the UART is connected to an RS-422 transceiver with the
+/- pins hooked up backward. Instead of a hack flipping all the bits
before sending them, the hardware can do it for free.
Functionally unchanged from v1, but the confidentiality notice has been
removed. I also CC'd other lists that Uwe suggested.
George Hilliard (2):
dt-bindings: serial: document fsl,inverted-tx and -rx options
tty: imx serial: Implement support for reversing TX and RX polarity
.../bindings/serial/fsl-imx-uart.txt | 4 ++++
drivers/tty/serial/imx.c | 22 +++++++++++++------
2 files changed, 19 insertions(+), 7 deletions(-)
--
2.25.0
next reply other threads:[~2020-02-10 19:30 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-10 19:29 George Hilliard [this message]
2020-02-10 19:29 ` [PATCH v2 1/2] dt-bindings: serial: document fsl,inverted-tx and -rx options George Hilliard
2020-02-10 19:29 ` [PATCH v2 2/2] tty: imx serial: Implement support for reversing TX and RX polarity George Hilliard
2020-02-10 20:50 ` Uwe Kleine-König
2020-02-10 23:03 ` George Hilliard
2020-02-11 7:38 ` Uwe Kleine-König
2020-02-11 16:18 ` George Hilliard
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