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>

diff --git a/drivers/mfd/wm5102-tables.c b/drivers/mfd/wm5102-tables.c
index 1133a64c2dc9388609ff125c480a82840d9285d1..ee0a109f5ce9591734ec7cbc23682c204736718f 100644 (file)
--- 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;
        }
 }