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authorDmitry Baryshkov <dbaryshkov@gmail.com>2010-06-11 01:52:35 +0000
committerGrant Likely <grant.likely@secretlab.ca>2010-06-15 14:47:04 -0600
commitfb73538e10c7fc4823a56e97bba600c2f9294012 (patch)
tree4b3766db5c91161d90ae0a0a33fb6293f52109f7 /arch/powerpc
parenta2c9a603c72be0d9a0780f196bff53ab0d517347 (diff)
downloadlinux-fb73538e10c7fc4823a56e97bba600c2f9294012.tar.bz2
powerpc/5200: fix oops during going to standby
When going to standby mode mpc code maps the whole soc5200 node to access warious MBAR registers. However as of_iomap uses 'reg' property of device node, only small part of MBAR is getting mapped. Thus pm code gets oops when trying to access high parts of MBAR. As a way to overcome this, make mpc52xx_pm_prepare() explicitly map whole MBAR (0xc0000). Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/platforms/52xx/mpc52xx_pm.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_pm.c b/arch/powerpc/platforms/52xx/mpc52xx_pm.c
index a55b0b6813ed..76722532bd95 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_pm.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_pm.c
@@ -64,10 +64,19 @@ int mpc52xx_pm_prepare(void)
{ .type = "builtin", .compatible = "mpc5200", }, /* efika */
{}
};
+ struct resource res;
/* map the whole register space */
np = of_find_matching_node(NULL, immr_ids);
- mbar = of_iomap(np, 0);
+
+ if (of_address_to_resource(np, 0, &res)) {
+ pr_err("mpc52xx_pm_prepare(): could not get IMMR address\n");
+ of_node_put(np);
+ return -ENOSYS;
+ }
+
+ mbar = ioremap(res.start, 0xc000); /* we should map whole region including SRAM */
+
of_node_put(np);
if (!mbar) {
pr_err("mpc52xx_pm_prepare(): could not map registers\n");