From: Daniel Mack <daniel@zonque.org>
To: devicetree@vger.kernel.org, linux-serial@vger.kernel.org
Cc: gregkh@linuxfoundation.org, robh+dt@kernel.org, jslaby@suse.com,
pascal.huerst@gmail.com
Subject: [PATCH 2/4] sc16is7xx: Add flag to activate IrDA mode
Date: Fri, 8 May 2020 16:37:55 +0200 [thread overview]
Message-ID: <20200508143757.2609740-3-daniel@zonque.org> (raw)
In-Reply-To: <20200508143757.2609740-1-daniel@zonque.org>
From: Pascal Huerst <pascal.huerst@gmail.com>
This series of uart controllers is able to work in IrDA mode.
Add per-port flag to the device-tree to enable that feature if needed.
Signed-off-by: Pascal Huerst <pascal.huerst@gmail.com>
---
drivers/tty/serial/sc16is7xx.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index 7d3ae31cc720..e4025b8566a4 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -315,6 +315,7 @@ struct sc16is7xx_one {
struct kthread_work tx_work;
struct kthread_work reg_work;
struct sc16is7xx_one_config config;
+ bool irda_mode;
};
struct sc16is7xx_port {
@@ -994,6 +995,7 @@ static int sc16is7xx_config_rs485(struct uart_port *port,
static int sc16is7xx_startup(struct uart_port *port)
{
+ struct sc16is7xx_one *one = to_sc16is7xx_one(port, port);
struct sc16is7xx_port *s = dev_get_drvdata(port->dev);
unsigned int val;
@@ -1032,6 +1034,13 @@ static int sc16is7xx_startup(struct uart_port *port)
/* Now, initialize the UART */
sc16is7xx_port_write(port, SC16IS7XX_LCR_REG, SC16IS7XX_LCR_WORD_LEN_8);
+ /* Enable IrDA mode if requested in DT */
+ /* This bit must be written with LCR[7] = 0 */
+ sc16is7xx_port_update(port, SC16IS7XX_MCR_REG,
+ SC16IS7XX_MCR_IRDA_BIT,
+ one->irda_mode ?
+ SC16IS7XX_MCR_IRDA_BIT : 0);
+
/* Enable the Rx and Tx FIFO */
sc16is7xx_port_update(port, SC16IS7XX_EFCR_REG,
SC16IS7XX_EFCR_RXDISABLE_BIT |
@@ -1254,6 +1263,8 @@ static int sc16is7xx_probe(struct device *dev,
SC16IS7XX_IOCONTROL_SRESET_BIT);
for (i = 0; i < devtype->nr_uart; ++i) {
+ char name[32];
+
s->p[i].line = i;
/* Initialize port data */
s->p[i].port.dev = dev;
@@ -1271,6 +1282,9 @@ static int sc16is7xx_probe(struct device *dev,
goto out_ports;
}
+ snprintf(name, sizeof(name), "linux,irda-mode-port-%d", i);
+ s->p[i].irda_mode = device_property_read_bool(dev, name);
+
/* Disable all interrupts */
sc16is7xx_port_write(&s->p[i].port, SC16IS7XX_IER_REG, 0);
/* Disable TX/RX */
--
2.26.2
next prev parent reply other threads:[~2020-05-08 14:43 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-08 14:37 [PATCH 0/4] sc16is7xx: Add IrDA mode and threaded IRQ Daniel Mack
2020-05-08 14:37 ` [PATCH 1/4] dt-bindings: sc16is7xx: Add flag to activate IrDA mode Daniel Mack
2020-05-18 18:08 ` Rob Herring
2020-05-18 18:41 ` Daniel Mack
2020-05-19 12:01 ` Maarten Brock
2020-05-08 14:37 ` Daniel Mack [this message]
2020-05-08 14:37 ` [PATCH 3/4] sc16is7xx: Always use falling edge IRQ Daniel Mack
2020-05-09 12:41 ` Maarten Brock
2020-05-08 14:37 ` [PATCH 4/4] sc16is7xx: Use threaded IRQ Daniel Mack
2020-05-09 12:55 ` Maarten Brock
2020-05-17 20:44 ` Daniel Mack
2020-05-18 11:14 ` Maarten Brock
2020-05-18 16:57 ` Daniel Mack
2020-05-19 16:32 ` Maarten Brock
2020-05-19 17:37 ` Daniel Mack
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200508143757.2609740-3-daniel@zonque.org \
--to=daniel@zonque.org \
--cc=devicetree@vger.kernel.org \
--cc=gregkh@linuxfoundation.org \
--cc=jslaby@suse.com \
--cc=linux-serial@vger.kernel.org \
--cc=pascal.huerst@gmail.com \
--cc=robh+dt@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).