57 #define CDNS_UART_BAUDGEN	0x18  /* Baud Rate Generator */
64 #define CDNS_UART_BAUDDIV	0x34  /* Baud Rate Divider */
174 /* baud dividers min/max values */
185  * @baud:		Current baud rate
193 	unsigned int		baud;  member
381  * cdns_uart_calc_baud_divs - Calculate baud rate divisors
383  * @baud: Desired baud rate
387  * Return: baud rate, requested baud when possible, or actual baud when there
390  * Formula to obtain baud rate is
397  *			baud rate generate register
398  *			baud rate clock divisor register
401 		unsigned int baud, u32 *rbdiv, u32 *rcd, int *div8)  in cdns_uart_calc_baud_divs()  argument
409 	if (baud < clk / ((CDNS_UART_BDIV_MAX + 1) * CDNS_UART_CD_MAX)) {  in cdns_uart_calc_baud_divs()
417 		cd = DIV_ROUND_CLOSEST(clk, baud * (bdiv + 1));  in cdns_uart_calc_baud_divs()
423 		if (baud > calc_baud)  in cdns_uart_calc_baud_divs()
424 			bauderror = baud - calc_baud;  in cdns_uart_calc_baud_divs()
426 			bauderror = calc_baud - baud;  in cdns_uart_calc_baud_divs()
436 	if (((besterror * 100) / baud) < 3)  in cdns_uart_calc_baud_divs()
437 		bestbaud = baud;  in cdns_uart_calc_baud_divs()
443  * cdns_uart_set_baud_rate - Calculate and set the baud rate
445  * @baud: Baud rate to set
446  * Return: baud rate, requested baud when possible, or actual baud when there
450 		unsigned int baud)  in cdns_uart_set_baud_rate()  argument
458 	calc_baud = cdns_uart_calc_baud_divs(port->uartclk, baud, &bdiv, &cd,  in cdns_uart_set_baud_rate()
470 	cdns_uart->baud = baud;  in cdns_uart_set_baud_rate()
504 		 * Find out if current baud-rate can be achieved with new clock  in cdns_uart_clk_notifier_cb()
507 		if (!cdns_uart_calc_baud_divs(ndata->new_rate, cdns_uart->baud,  in cdns_uart_clk_notifier_cb()
515 		/* Disable the TX and RX to set baud rate */  in cdns_uart_clk_notifier_cb()
526 		 * Set clk dividers to generate correct baud with new clock  in cdns_uart_clk_notifier_cb()
535 		cdns_uart->baud = cdns_uart_set_baud_rate(cdns_uart->port,  in cdns_uart_clk_notifier_cb()
536 				cdns_uart->baud);  in cdns_uart_clk_notifier_cb()
675  *				stop bits, flow control, baud rate
684 	unsigned int baud, minbaud, maxbaud;  in cdns_uart_set_termios()  local
702 	/* Disable the TX and RX to set baud rate */  in cdns_uart_set_termios()
708 	 * Min baud rate = 6bps and Max Baud Rate is 10Mbps for 100Mhz clk  in cdns_uart_set_termios()
709 	 * min and max baud should be calculated here based on port->uartclk.  in cdns_uart_set_termios()
710 	 * this way we get a valid baud and can safely call set_baud()  in cdns_uart_set_termios()
715 	baud = uart_get_baud_rate(port, termios, old, minbaud, maxbaud);  in cdns_uart_set_termios()
716 	baud = cdns_uart_set_baud_rate(port, baud);  in cdns_uart_set_termios()
718 		tty_termios_encode_baud_rate(termios, baud, baud);  in cdns_uart_set_termios()
721 	uart_update_timeout(port, termios->c_cflag, baud);  in cdns_uart_set_termios()
1145 	/* only set baud if specified on command line - otherwise  in cdns_early_console_setup()
1148 	if (port->uartclk && device->baud) {  in cdns_early_console_setup()
1153 		cdns_uart_calc_baud_divs(port->uartclk, device->baud,  in cdns_early_console_setup()
1235 	int baud = 9600;  in cdns_uart_console_setup()  local
1248 		uart_parse_options(options, &baud, &parity, &bits, &flow);  in cdns_uart_console_setup()
1257 	return uart_set_options(port, co, baud, parity, bits, flow);  in cdns_uart_console_setup()