From: Jongpill Lee Date: Fri, 16 Jul 2010 01:19:41 +0000 (+0900) Subject: ARM: SAMSUNG: serial: Add FRACVAL support for newer UART X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8b526ae4ddd7a62397d99856079b59eda5d09360;p=linux-beck.git 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: Jongpill Lee Acked-by: Changhwan Youn Signed-off-by: Kukjin Kim --- diff --git a/arch/arm/plat-samsung/include/plat/regs-serial.h b/arch/arm/plat-samsung/include/plat/regs-serial.h index a6eba8496b24..788837e99cb3 100644 --- a/arch/arm/plat-samsung/include/plat/regs-serial.h +++ b/arch/arm/plat-samsung/include/plat/regs-serial.h @@ -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 */ diff --git a/drivers/serial/samsung.c b/drivers/serial/samsung.c index a9d6c5626a0a..b1156ba8ad14 100644 --- a/drivers/serial/samsung.c +++ b/drivers/serial/samsung.c @@ -705,8 +705,13 @@ static void s3c24xx_serial_set_termios(struct uart_port *port, if (ourport->info->has_divslot) { unsigned int div = ourport->baudclk_rate / baud; - udivslot = udivslot_table[div & 15]; - dbg("udivslot = %04x (div %d)\n", udivslot, div & 15); + 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) {