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>

diff --git a/drivers/bus/mips_cdmm.c b/drivers/bus/mips_cdmm.c
index 5bd792c68f9b897ddbafe50a39c3bdb9b49306d6..ab3bde16ecb4443a2e63d8e327fa1db730294dff 100644 (file)
--- 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;