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authorLaurent Pinchart <laurentp@cse-semaphore.com>2008-04-10 17:01:27 +0200
committerKumar Gala <galak@kernel.crashing.org>2008-04-17 01:01:36 -0500
commitd464df2667cf181419604e656773f80996cf0470 (patch)
treefedca2185763550331f0a73450c1d82f0c146ad6 /drivers/serial/cpm_uart/cpm_uart_cpm1.c
parent1028d4f162796a99b87565b6b40b5fec79c242d0 (diff)
[POWERPC] cpm_uart: Allocate DPRAM memory for SMC ports on CPM2-based platforms.
This patch allocates parameter RAM for SMC serial ports without relying on previous initialisation by a boot loader or a wrapper layer. SMC parameter RAM on CPM2-based platforms can be allocated anywhere in the general-purpose areas of the dual-port RAM. The current code relies on the boot loader to allocate a section of general-purpose CPM RAM and gets the section address from the device tree. This patch modifies the device tree address usage to reference the SMC parameter RAM base pointer instead of a pre-allocated RAM section and allocates memory from the CPM dual-port RAM when initialising the SMC port. CPM1-based platforms are not affected. Signed-off-by: Laurent Pinchart <laurentp@cse-semaphore.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'drivers/serial/cpm_uart/cpm_uart_cpm1.c')
-rw-r--r--drivers/serial/cpm_uart/cpm_uart_cpm1.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/serial/cpm_uart/cpm_uart_cpm1.c b/drivers/serial/cpm_uart/cpm_uart_cpm1.c
index 6ea0366e26a..74f1432bb24 100644
--- a/drivers/serial/cpm_uart/cpm_uart_cpm1.c
+++ b/drivers/serial/cpm_uart/cpm_uart_cpm1.c
@@ -45,6 +45,8 @@
#include <linux/serial_core.h>
#include <linux/kernel.h>
+#include <linux/of.h>
+
#include "cpm_uart.h"
/**************************************************************/
@@ -54,6 +56,18 @@ void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd)
{
cpm_command(port->command, cmd);
}
+
+void __iomem *cpm_uart_map_pram(struct uart_cpm_port *port,
+ struct device_node *np)
+{
+ return of_iomap(np, 1);
+}
+
+void cpm_uart_unmap_pram(struct uart_cpm_port *port, void __iomem *pram)
+{
+ iounmap(pram);
+}
+
#else
void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd)
{