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Commit 8b526ae4 authored by Jongpill Lee's avatar Jongpill Lee Committed by Kukjin Kim
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ARM: SAMSUNG: serial: Add FRACVAL support for newer UART 



Add support for the FRACVAL register on the newer UART blocks which provides
the same function as UDIVSLOT register but the FRACVAL is easier to implement.
To support UDIVSLOT register, UDIVSLOT table search is necessary though
supporting FRACVAL only needs the index value of UDIVSLOT table.

Signed-off-by: default avatarJongpill Lee <boyko.lee@samsung.com>
Acked-by: default avatarChanghwan Youn <chaos.youn@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent 9fe6206f

arch/arm/plat-samsung/include/plat/regs-serial.h

+2 −0
Original line number Diff line number Diff line
@@ -259,6 +259,8 @@ struct s3c2410_uartcfg { 
	unsigned short	   flags;

	upf_t		   uart_flags;	 /* default uart flags */



	unsigned int	   has_fracval;



	unsigned long	   ucon;	 /* value of ucon for port */

	unsigned long	   ulcon;	 /* value of ulcon for port */

	unsigned long	   ufcon;	 /* value of ufcon for port */

drivers/serial/samsung.c

+7 −2
Original line number Diff line number Diff line
@@ -705,9 +705,14 @@ static void s3c24xx_serial_set_termios(struct uart_port *port, 
	if (ourport->info->has_divslot) {

		unsigned int div = ourport->baudclk_rate / baud;



		if (cfg->has_fracval) {

			udivslot = (div & 15);

			dbg("fracval = %04x\n", udivslot);

		} else {

			udivslot = udivslot_table[div & 15];

			dbg("udivslot = %04x (div %d)\n", udivslot, div & 15);

		}

	}



	switch (termios->c_cflag & CSIZE) {

	case CS5: