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Commit e5586ecc authored by Feng Tang's avatar Feng Tang Committed by Greg Kroah-Hartman
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serial: mfd: add more baud rates support 



Add more baud rates support referring the baud_table[] defined
in drivers/char/tty_ioctl.c: 3000000/2000000/1000000/500000

Signed-off-by: default avatarFeng Tang <feng.tang@intel.com>
Acked-by: default avatarAlan Cox <alan.cox@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent abf4f6a5

drivers/serial/mfd.c

+27 −14
Original line number Diff line number Diff line
@@ -929,39 +929,52 @@ serial_hsu_set_termios(struct uart_port *port, struct ktermios *termios, 
		cval |= UART_LCR_EPAR;



	/*

	 * The base clk is 50Mhz, and the baud rate come from:

	 *	baud = 50M * MUL / (DIV * PS * DLAB)

	 *

	 * For those basic low baud rate we can get the direct

	 * scalar from 2746800, like 115200 = 2746800/24, for those

	 * higher baud rate, we have to handle them case by case,

	 * but DIV reg is never touched as its default value 0x3d09

	 * scalar from 2746800, like 115200 = 2746800/24. For those

	 * higher baud rate, we handle them case by case, mainly by

	 * adjusting the MUL/PS registers, and DIV register is kept

	 * as default value 0x3d09 to make things simple

	 */

	baud = uart_get_baud_rate(port, termios, old, 0, 4000000);

	quot = uart_get_divisor(port, baud);



	quot = 1;

	switch (baud) {

	case 3500000:

		mul = 0x3345;

		ps = 0xC;

		quot = 1;

		break;

	case 3000000:

		mul = 0x2EE0;

		break;

	case 2500000:

		mul = 0x2710;

		ps = 0x10;

		quot = 1;

		break;

	case 18432000:

	case 2000000:

		mul = 0x1F40;

		break;

	case 1843200:

		mul = 0x2400;

		ps = 0x10;

		quot = 1;

		break;

	case 1500000:

		mul = 0x1D4C;

		ps = 0xc;

		quot = 1;

		mul = 0x1770;

		break;

	case 1000000:

		mul = 0xFA0;

		break;

	case 500000:

		mul = 0x7D0;

		break;

	default:

		;

		/* Use uart_get_divisor to get quot for other baud rates */

		quot = 0;

	}



	if (!quot)

		quot = uart_get_divisor(port, baud);



	if ((up->port.uartclk / quot) < (2400 * 16))

		fcr = UART_FCR_ENABLE_FIFO | UART_FCR_HSU_64_1B;

	else if ((up->port.uartclk / quot) < (230400 * 16))