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| author | James Hogan <james.hogan@imgtec.com> | 2015-04-28 10:57:29 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-05-26 16:46:52 +0200 |
| commit | e21422de817ab0b67ed1902fe1383bcdeece855e (patch) | |
| tree | 4d6ade38fa6638a82c49f0321f0401176ff7f5b1 /drivers/bus/mips_cdmm.c | |
| parent | ba155e2d21f6bf05de86a78dbe5bfd8757604a65 (diff) | |
| download | lwn-e21422de817ab0b67ed1902fe1383bcdeece855e.tar.gz lwn-e21422de817ab0b67ed1902fe1383bcdeece855e.zip | |
MIPS: Fix CDMM to use native endian MMIO reads
The MIPS Common Device Memory Map (CDMM) is internal to the core and has
native endianness. There is therefore no need to byte swap the accesses
on big endian targets, so convert the CDMM bus driver to use
__raw_readl() rather than readl().
Fixes: 8286ae03308c ("MIPS: Add CDMM bus support")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9904/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'drivers/bus/mips_cdmm.c')
| -rw-r--r-- | drivers/bus/mips_cdmm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/bus/mips_cdmm.c b/drivers/bus/mips_cdmm.c index 5bd792c68f9b..ab3bde16ecb4 100644 --- a/drivers/bus/mips_cdmm.c +++ b/drivers/bus/mips_cdmm.c @@ -453,7 +453,7 @@ void __iomem *mips_cdmm_early_probe(unsigned int dev_type) /* Look for a specific device type */ for (; drb < bus->drbs; drb += size + 1) { - acsr = readl(cdmm + drb * CDMM_DRB_SIZE); + acsr = __raw_readl(cdmm + drb * CDMM_DRB_SIZE); type = (acsr & CDMM_ACSR_DEVTYPE) >> CDMM_ACSR_DEVTYPE_SHIFT; if (type == dev_type) return cdmm + drb * CDMM_DRB_SIZE; @@ -500,7 +500,7 @@ static void mips_cdmm_bus_discover(struct mips_cdmm_bus *bus) bus->discovered = true; pr_info("cdmm%u discovery (%u blocks)\n", cpu, bus->drbs); for (; drb < bus->drbs; drb += size + 1) { - acsr = readl(cdmm + drb * CDMM_DRB_SIZE); + acsr = __raw_readl(cdmm + drb * CDMM_DRB_SIZE); type = (acsr & CDMM_ACSR_DEVTYPE) >> CDMM_ACSR_DEVTYPE_SHIFT; size = (acsr & CDMM_ACSR_DEVSIZE) >> CDMM_ACSR_DEVSIZE_SHIFT; rev = (acsr & CDMM_ACSR_DEVREV) >> CDMM_ACSR_DEVREV_SHIFT; |