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Commit 8ee3fde0 authored by Rob Herring's avatar Rob Herring Committed by Greg Kroah-Hartman
Browse files

tty_port: register tty ports with serdev bus 



Register a serdev controller with the serdev bus when a tty_port is
registered. This creates the serdev controller and create's serdev
devices for any DT child nodes of the tty_port's parent (i.e. the UART
device).

Signed-off-by: default avatarRob Herring <robh@kernel.org>
Reviewed-By: default avatarSebastian Reichel <sre@kernel.org>
Tested-By: default avatarSebastian Reichel <sre@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent bed35c6d

drivers/tty/tty_port.c

+12 −0
Original line number Original line Diff line number Diff line
@@ -16,6 +16,7 @@ 
#include <linux/bitops.h>

#include <linux/bitops.h>

#include <linux/delay.h>

#include <linux/delay.h>

#include <linux/module.h>

#include <linux/module.h>

#include <linux/serdev.h>





static int tty_port_default_receive_buf(struct tty_port *port,

static int tty_port_default_receive_buf(struct tty_port *port,

					const unsigned char *p,

					const unsigned char *p,
@@ -128,7 +129,15 @@ struct device *tty_port_register_device_attr(struct tty_port *port, 
		struct device *device, void *drvdata,

		struct device *device, void *drvdata,

		const struct attribute_group **attr_grp)

		const struct attribute_group **attr_grp)

{

{

	struct device *dev;



	tty_port_link_device(port, driver, index);

	tty_port_link_device(port, driver, index);



	dev = serdev_tty_port_register(port, device, driver, index);

	if (PTR_ERR(dev) != -ENODEV)

		/* Skip creating cdev if we registered a serdev device */

		return dev;



	return tty_register_device_attr(driver, index, device, drvdata,

	return tty_register_device_attr(driver, index, device, drvdata,

			attr_grp);

			attr_grp);

}

}
@@ -180,6 +189,9 @@ static void tty_port_destructor(struct kref *kref) 
	/* check if last port ref was dropped before tty release */

	/* check if last port ref was dropped before tty release */

	if (WARN_ON(port->itty))

	if (WARN_ON(port->itty))

		return;

		return;



	serdev_tty_port_unregister(port);



	if (port->xmit_buf)

	if (port->xmit_buf)

		free_page((unsigned long)port->xmit_buf);

		free_page((unsigned long)port->xmit_buf);

	tty_port_destroy(port);

	tty_port_destroy(port);