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[ARM] 3029/1: Add HWUART support for PXA 255/26x

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Patch from Matt Reimer

Adds support for HWUART on PXA 255 / 26x. This patch originally came from
http://svn.rungie.com/svn/gumstix-buildroot/trunk/sources/kernel-patches/000-gumstix-hwuart.patch
and has been tweaked by me.

Signed-off-by: Matt Reimer <mreimer@vpop.net>
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Matt Reimer
2005-10-28 16:25:02 +01:00
committed by Russell King
parent 80a18573ce
commit d9e2964987
4 changed files with 71 additions and 2 deletions
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21
drivers/serial/pxa.c
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@@ -358,6 +358,9 @@ static int serial_pxa_startup(struct uart_port *port)
unsigned long flags;
int retval;
if (port->line == 3) /* HWUART */
up->mcr |= UART_MCR_AFE;
else
up->mcr = 0;
/*
@@ -481,8 +484,10 @@ serial_pxa_set_termios(struct uart_port *port, struct termios *termios,
if ((up->port.uartclk / quot) < (2400 * 16))
fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR1;
else
else if ((up->port.uartclk / quot) < (230400 * 16))
fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR8;
else
fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR32;
/*
* Ok, we're now changing the port state. Do it with
@@ -772,6 +777,20 @@ static struct uart_pxa_port serial_pxa_ports[] = {
.ops = &serial_pxa_pops,
.line = 2,
},
}, { /* HWUART */
.name = "HWUART",
.cken = CKEN4_HWUART,
.port = {
.type = PORT_PXA,
.iotype = UPIO_MEM,
.membase = (void *)&HWUART,
.mapbase = __PREG(HWUART),
.irq = IRQ_HWUART,
.uartclk = 921600 * 16,
.fifosize = 64,
.ops = &serial_pxa_pops,
.line = 3,
},
}
};