53 #define CDNS_UART_BAUDGEN	0x18  /* Baud Rate Generator */
60 #define CDNS_UART_BAUDDIV	0x34  /* Baud Rate Divider */
180 /* baud dividers min/max values */
192  * @baud:		Current baud rate
201 	unsigned int		baud;  member
393  * cdns_uart_calc_baud_divs - Calculate baud rate divisors
395  * @baud: Desired baud rate
399  * Return: baud rate, requested baud when possible, or actual baud when there
402  * Formula to obtain baud rate is
409  *			baud rate generate register
410  *			baud rate clock divisor register
413 		unsigned int baud, u32 *rbdiv, u32 *rcd, int *div8)  in cdns_uart_calc_baud_divs()  argument
421 	if (baud < clk / ((CDNS_UART_BDIV_MAX + 1) * CDNS_UART_CD_MAX)) {  in cdns_uart_calc_baud_divs()
429 		cd = DIV_ROUND_CLOSEST(clk, baud * (bdiv + 1));  in cdns_uart_calc_baud_divs()
435 		if (baud > calc_baud)  in cdns_uart_calc_baud_divs()
436 			bauderror = baud - calc_baud;  in cdns_uart_calc_baud_divs()
438 			bauderror = calc_baud - baud;  in cdns_uart_calc_baud_divs()
448 	if (((besterror * 100) / baud) < 3)  in cdns_uart_calc_baud_divs()
449 		bestbaud = baud;  in cdns_uart_calc_baud_divs()
455  * cdns_uart_set_baud_rate - Calculate and set the baud rate
457  * @baud: Baud rate to set
458  * Return: baud rate, requested baud when possible, or actual baud when there
462 		unsigned int baud)  in cdns_uart_set_baud_rate()  argument
470 	calc_baud = cdns_uart_calc_baud_divs(port->uartclk, baud, &bdiv, &cd,  in cdns_uart_set_baud_rate()
482 	cdns_uart->baud = baud;  in cdns_uart_set_baud_rate()
516 		 * Find out if current baud-rate can be achieved with new clock  in cdns_uart_clk_notifier_cb()
519 		if (!cdns_uart_calc_baud_divs(ndata->new_rate, cdns_uart->baud,  in cdns_uart_clk_notifier_cb()
527 		/* Disable the TX and RX to set baud rate */  in cdns_uart_clk_notifier_cb()
538 		 * Set clk dividers to generate correct baud with new clock  in cdns_uart_clk_notifier_cb()
547 		cdns_uart->baud = cdns_uart_set_baud_rate(cdns_uart->port,  in cdns_uart_clk_notifier_cb()
548 				cdns_uart->baud);  in cdns_uart_clk_notifier_cb()
688  *				stop bits, flow control, baud rate
697 	unsigned int baud, minbaud, maxbaud;  in cdns_uart_set_termios()  local
703 	/* Disable the TX and RX to set baud rate */  in cdns_uart_set_termios()
709 	 * Min baud rate = 6bps and Max Baud Rate is 10Mbps for 100Mhz clk  in cdns_uart_set_termios()
710 	 * min and max baud should be calculated here based on port->uartclk.  in cdns_uart_set_termios()
711 	 * this way we get a valid baud and can safely call set_baud()  in cdns_uart_set_termios()
716 	baud = uart_get_baud_rate(port, termios, old, minbaud, maxbaud);  in cdns_uart_set_termios()
717 	baud = cdns_uart_set_baud_rate(port, baud);  in cdns_uart_set_termios()
719 		tty_termios_encode_baud_rate(termios, baud, baud);  in cdns_uart_set_termios()
722 	uart_update_timeout(port, termios->c_cflag, baud);  in cdns_uart_set_termios()
1174 	/* only set baud if specified on command line - otherwise  in cdns_early_console_setup()
1177 	if (port->uartclk && device->baud) {  in cdns_early_console_setup()
1182 		cdns_uart_calc_baud_divs(port->uartclk, device->baud,  in cdns_early_console_setup()
1262 	int baud = 9600;  in cdns_uart_console_setup()  local
1275 		uart_parse_options(options, &baud, &parity, &bits, &flow);  in cdns_uart_console_setup()
1284 	return uart_set_options(port, co, baud, parity, bits, flow);  in cdns_uart_console_setup()