static int
ar933x_param(struct uart_bas *bas, int baudrate, int databits, int stopbits,
int parity)
{
/* UART always 8 bits */
/* UART always 1 stop bit */
/* UART parity is controllable by bits 0:1, ignore for now */
/* Set baudrate if required. */
if (baudrate > 0) {
uint32_t clock_scale, clock_step;
/* Find the best fit for the given baud rate */
ar933x_uart_get_scale_step(bas, baudrate, &clock_scale,
&clock_step);
/*
* Program the clock register in its entirety - no need
* for Read-Modify-Write.
*/
ar933x_setreg(bas, AR933X_UART_CLOCK_REG,
((clock_scale & AR933X_UART_CLOCK_SCALE_M)
<< AR933X_UART_CLOCK_SCALE_S) |
(clock_step & AR933X_UART_CLOCK_STEP_M));
}
uart_barrier(bas);
return (0);
}
static int ar933x_serial_setbaudrate(struct console_device *cdev, int baudrate)
{
struct ar933x_uart_priv *priv = cdev->dev->priv;
unsigned int scale, step;
ar933x_uart_get_scale_step(clk_get_rate(priv->clk), baudrate, &scale,
&step);
ar933x_serial_writel(cdev, (scale << AR933X_UART_CLOCK_SCALE_S) | step,
AR933X_UART_CLOCK_REG);
return 0;
}