mfd: wm5102: Mark only extant DSP registers volatile

Since regmap sometimes uses volatile as a proxy for readable simply
having a blanket condition can mark too many registers as readable.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 7 insertions, 4 deletions

diff --git a/drivers/mfd/wm5102-tables.c b/drivers/mfd/wm5102-tables.c
index 1133a64c2dc9..ee0a109f5ce9 100644
--- a/drivers/mfd/wm5102-tables.c
+++ b/drivers/mfd/wm5102-tables.c
@@ -1831,9 +1831,6 @@ static bool wm5102_readable_register(struct device *dev, unsigned int reg)
 
 static bool wm5102_volatile_register(struct device *dev, unsigned int reg)
 {
-        if (reg > 0xffff)
-                return true;
-
         switch (reg) {
         case ARIZONA_SOFTWARE_RESET:
         case ARIZONA_DEVICE_REVISION:
@@ -1878,7 +1875,13 @@ static bool wm5102_volatile_register(struct device *dev, unsigned int reg)
         case ARIZONA_MIC_DETECT_3:
                 return true;
         default:
-                return false;
+                if ((reg >= 0x100000 && reg < 0x106000) ||
+                    (reg >= 0x180000 && reg < 0x180800) ||
+                    (reg >= 0x190000 && reg < 0x194800) ||
+                    (reg >= 0x1a8000 && reg < 0x1a9800))
+                        return true;
+                else
+                        return false;
         }
 }