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| author | Dmitry Baryshkov <dbaryshkov@gmail.com> | 2010-06-11 01:52:35 +0000 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2010-06-15 14:47:04 -0600 |
| commit | fb73538e10c7fc4823a56e97bba600c2f9294012 (patch) | |
| tree | 4b3766db5c91161d90ae0a0a33fb6293f52109f7 /arch | |
| parent | a2c9a603c72be0d9a0780f196bff53ab0d517347 (diff) | |
| download | linux-stable-fb73538e10c7fc4823a56e97bba600c2f9294012.tar.gz linux-stable-fb73538e10c7fc4823a56e97bba600c2f9294012.tar.bz2 linux-stable-fb73538e10c7fc4823a56e97bba600c2f9294012.zip | |
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')
| -rw-r--r-- | arch/powerpc/platforms/52xx/mpc52xx_pm.c | 11 |
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"); |