diff options
author | Laurent Pinchart <laurentp@cse-semaphore.com> | 2008-04-10 17:01:27 +0200 |
---|---|---|
committer | Kumar Gala <galak@kernel.crashing.org> | 2008-04-17 01:01:36 -0500 |
commit | d464df2667cf181419604e656773f80996cf0470 (patch) | |
tree | fedca2185763550331f0a73450c1d82f0c146ad6 /drivers/serial/cpm_uart/cpm_uart_cpm1.c | |
parent | 1028d4f162796a99b87565b6b40b5fec79c242d0 (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.c | 14 |
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) { |