C++ (Cpp) s3c24xx_serial_set_termios示例

示例#1

static int s3c24xx_serial_cpufreq_transition(struct notifier_block *nb,
        unsigned long val, void *data)
{
    struct s3c24xx_uart_port *port;
    struct uart_port *uport;

    port = container_of(nb, struct s3c24xx_uart_port, freq_transition);
    uport = &port->port;

    /* check to see if port is enabled */

    if (port->pm_level != 0)
        return 0;

    /* try and work out if the baudrate is changing, we can detect
     * a change in rate, but we do not have support for detecting
     * a disturbance in the clock-rate over the change.
     */

    if (IS_ERR(port->clk))
        goto exit;

    if (port->baudclk_rate == clk_get_rate(port->clk))
        goto exit;

    if (val == CPUFREQ_PRECHANGE) {
        /* we should really shut the port down whilst the
         * frequency change is in progress. */

    } else if (val == CPUFREQ_POSTCHANGE) {
        struct ktermios *termios;
        struct tty_struct *tty;

        if (uport->state == NULL)
            goto exit;

        tty = uport->state->port.tty;

        if (tty == NULL)
            goto exit;

        termios = tty->termios;

        if (termios == NULL) {
            printk(KERN_WARNING "%s: no termios?\n", __func__);
            goto exit;
        }

        s3c24xx_serial_set_termios(uport, termios, NULL);
    }

exit:
    return 0;
}

示例#2

static int s3c24xx_serial_cpufreq_transition(struct notifier_block *nb,
					     unsigned long val, void *data)
{
	struct s3c24xx_uart_port *port;
	struct uart_port *uport;

	port = container_of(nb, struct s3c24xx_uart_port, freq_transition);
	uport = &port->port;

	

	if (port->pm_level != 0)
		return 0;

	

	if (IS_ERR(port->clk))
		goto exit;

	if (port->baudclk_rate == clk_get_rate(port->clk))
		goto exit;

	if (val == CPUFREQ_PRECHANGE) {
		

	} else if (val == CPUFREQ_POSTCHANGE) {
		struct ktermios *termios;
		struct tty_struct *tty;

		if (uport->state == NULL)
			goto exit;

		tty = uport->state->port.tty;

		if (tty == NULL)
			goto exit;

		termios = tty->termios;

		if (termios == NULL) {
			printk(KERN_WARNING "%s: no termios?\n", __func__);
			goto exit;
		}

		s3c24xx_serial_set_termios(uport, termios, NULL);
	}

 exit:
	return 0;
}