From: Martin Kepplinger <martin.kepplinger@ginzinger.com>
To: gregkh@linuxfoundation.org, robh+dt@kernel.org,
mark.rutland@arm.com, jslaby@suse.com, corbet@lwn.net,
richard.genoud@gmail.com, nicolas.ferre@microchip.com,
alexandre.belloni@bootlin.com, ludovic.desroches@microchip.com,
mcoquelin.stm32@gmail.com, alexandre.torgue@st.com,
linux-serial@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-stm32@st-md-mailman.stormreply.com
Cc: linux-kernel@vger.kernel.org,
Martin Kepplinger <martin.kepplinger@ginzinger.com>
Subject: [PATCH v2 6/9] serial: sc16is7xx: add support for rs485 RTS delays in microseconds
Date: Thu, 21 Feb 2019 18:17:55 +0100 [thread overview]
Message-ID: <20190221171758.10322-6-martin.kepplinger@ginzinger.com> (raw)
In-Reply-To: <20190221171758.10322-1-martin.kepplinger@ginzinger.com>
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Read struct serial_rs485's flag SER_RS485_DELAY_IN_USEC and apply the delay
accordingly.
Signed-off-by: Martin Kepplinger <martin.kepplinger@ginzinger.com>
---
drivers/tty/serial/sc16is7xx.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index 635178cf3eed..b0e00b9fb177 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -743,7 +743,13 @@ static void sc16is7xx_tx_proc(struct kthread_work *ws)
struct uart_port *port = &(to_sc16is7xx_one(ws, tx_work)->port);
if ((port->rs485.flags & SER_RS485_ENABLED) &&
- (port->rs485.delay_rts_before_send > 0))
+ (port->rs485.delay_rts_before_send > 0) &&
+ (port->rs485.flags & SER_RS485_DELAY_IN_USEC))
+ usleep_range(port->rs485.delay_rts_before_send,
+ port->rs485.delay_rts_before_send);
+ else if ((port->rs485.flags & SER_RS485_ENABLED) &&
+ (port->rs485.delay_rts_before_send > 0) &&
+ !(port->rs485.flags & SER_RS485_DELAY_IN_USEC))
msleep(port->rs485.delay_rts_before_send);
sc16is7xx_handle_tx(port);
--
2.20.1
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next prev parent reply other threads:[~2019-02-21 17:17 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-21 17:17 [PATCH v2 1/9] serial: uapi: add SER_RS485_DELAY_IN_USEC flag to struct serial_rs485 Martin Kepplinger
2019-02-21 17:17 ` [PATCH v2 2/9] Documentation: serial-rs485: document SER_RS485_DELAY_IN_USEC flag Martin Kepplinger
2019-02-21 17:17 ` [PATCH v2 3/9] serial: core: add rs485-rts-delay-us devicetree property for RS485 Martin Kepplinger
2019-02-22 23:44 ` Rob Herring
2019-02-21 17:17 ` [PATCH v2 4/9] serial: 8250: add support for rs485 RTS delays in microseconds Martin Kepplinger
2019-03-29 14:36 ` Ahmad Fatoum
2019-02-21 17:17 ` [PATCH v2 5/9] serial: omap-serial: " Martin Kepplinger
2019-02-21 17:17 ` Martin Kepplinger [this message]
2019-02-21 17:17 ` [PATCH v2 7/9] serial: atmel_serial: set SER_RS485_DELAY_IN_USEC accordingly Martin Kepplinger
2019-02-21 17:17 ` [PATCH v2 8/9] serial: fsl_lpuart: " Martin Kepplinger
2019-02-21 17:17 ` [PATCH v2 9/9] serial: st32-usart: " Martin Kepplinger
2019-03-08 7:36 ` [PATCH v2 1/9] serial: uapi: add SER_RS485_DELAY_IN_USEC flag to struct serial_rs485 Martin Kepplinger
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