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| author | Timur Tabi <timur@freescale.com> | 2009-09-04 17:05:24 -0500 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2009-09-08 09:10:06 -0500 |
| commit | 74c5dfd81f94a2a1f0d6990d17c491d718e8b9ea (patch) | |
| tree | 9f6baf00f502561336e9ad55cbe5fda05e9ede6d | |
| parent | c7259086816405fe0eb77f4dc22e76980a040cef (diff) | |
| download | u-boot-imx-74c5dfd81f94a2a1f0d6990d17c491d718e8b9ea.zip u-boot-imx-74c5dfd81f94a2a1f0d6990d17c491d718e8b9ea.tar.gz u-boot-imx-74c5dfd81f94a2a1f0d6990d17c491d718e8b9ea.tar.bz2 | |
fsl: add register read-back to set_law()
After programming a new LAW, we should read-back the LAWAR register so that
we sync the writes. Otherwise, code that attempts to use the new LAW-mapped
memory might fail right away.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| -rw-r--r-- | drivers/misc/fsl_law.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/misc/fsl_law.c b/drivers/misc/fsl_law.c index 147fe0a..7bdd355 100644 --- a/drivers/misc/fsl_law.c +++ b/drivers/misc/fsl_law.c @@ -58,7 +58,8 @@ void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id) out_be32(lawbar, addr >> 12); out_be32(lawar, LAWAR_EN | ((u32)id << 20) | (u32)sz); - return ; + /* Read back so that we sync the writes */ + in_be32(lawar); } int set_next_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id) |