]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
[POWERPC] cpm_uart: Allocate DPRAM memory for SMC ports on CPM2-based platforms.
authorLaurent Pinchart <laurentp@cse-semaphore.com>
Thu, 10 Apr 2008 15:01:27 +0000 (17:01 +0200)
committerKumar Gala <galak@kernel.crashing.org>
Thu, 17 Apr 2008 06:01:36 +0000 (01:01 -0500)
commitd464df2667cf181419604e656773f80996cf0470
treefedca2185763550331f0a73450c1d82f0c146ad6
parent1028d4f162796a99b87565b6b40b5fec79c242d0
[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>
drivers/serial/cpm_uart/cpm_uart.h
drivers/serial/cpm_uart/cpm_uart_core.c
drivers/serial/cpm_uart/cpm_uart_cpm1.c
drivers/serial/cpm_uart/cpm_uart_cpm2.c