From mboxrd@z Thu Jan 1 00:00:00 1970 From: Felipe Balbi Subject: [PATCH v4 21/21] serial: omap: enable RX and TX FIFO usage Date: Thu, 6 Sep 2012 15:45:40 +0300 Message-ID: <1346935540-1792-22-git-send-email-balbi@ti.com> References: <20120906122948.GC29202@arwen.pp.htv.fi> <1346935540-1792-1-git-send-email-balbi@ti.com> Return-path: In-Reply-To: <1346935540-1792-1-git-send-email-balbi@ti.com> Sender: linux-omap-owner@vger.kernel.org To: Greg KH Cc: alan@linux.intel.com, Tony Lindgren , Kevin Hilman , Linux OMAP Mailing List , Linux ARM Kernel Mailing List , linux-serial@vger.kernel.org, Linux Kernel Mailing List , Santosh Shilimkar , Shubhrajyoti Datta , Sourav Poddar , Felipe Balbi List-Id: linux-serial@vger.kernel.org enable RX FIFO for 16 characters and TX FIFO for 16 spaces. Tested-by: Shubhrajyoti D Signed-off-by: Felipe Balbi --- drivers/tty/serial/omap-serial.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 164c3c9..cfd2094 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -56,8 +56,8 @@ #define OMAP_UART_SCR_RX_TRIG_GRANU1_MASK (1 << 7) /* FCR register bitmasks */ -#define OMAP_UART_FCR_RX_FIFO_TRIG_SHIFT 6 #define OMAP_UART_FCR_RX_FIFO_TRIG_MASK (0x3 << 6) +#define OMAP_UART_FCR_TX_FIFO_TRIG_MASK (0x3 << 4) /* MVR register bitmasks */ #define OMAP_UART_MVR_SCHEME_SHIFT 30 @@ -834,9 +834,13 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, up->scr |= OMAP_UART_SCR_RX_TRIG_GRANU1_MASK; - /* Set receive FIFO threshold to 1 byte */ + /* Set receive FIFO threshold to 16 characters and + * transmit FIFO threshold to 16 spaces + */ up->fcr &= ~OMAP_UART_FCR_RX_FIFO_TRIG_MASK; - up->fcr |= (0x1 << OMAP_UART_FCR_RX_FIFO_TRIG_SHIFT); + up->fcr &= ~OMAP_UART_FCR_TX_FIFO_TRIG_MASK; + up->fcr |= UART_FCR6_R_TRIGGER_16 | UART_FCR6_T_TRIGGER_24 | + UART_FCR_ENABLE_FIFO; serial_out(up, UART_FCR, up->fcr); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); -- 1.7.12.rc3