[ARM] 3029/1: Add HWUART support for PXA 255/26x
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>
diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c
index 90c2a86..005f027 100644
--- a/drivers/serial/pxa.c
+++ b/drivers/serial/pxa.c
@@ -358,6 +358,9 @@
unsigned long flags;
int retval;
+ if (port->line == 3) /* HWUART */
+ up->mcr |= UART_MCR_AFE;
+ else
up->mcr = 0;
/*
@@ -481,8 +484,10 @@
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 @@
.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,
+ },
}
};