mfd: Add comments for the twl4030-power register and bit layout
Describe how the resource registers are laid out and the various bit-fields in
them.
Signed-off-by: Amit Kucheria <amit.kucheria@verdurent.com>
Cc: linux-omap@vger.kernel.org
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/twl4030-power.c b/drivers/mfd/twl4030-power.c
index 82e3bcb..2c38ac1 100644
--- a/drivers/mfd/twl4030-power.c
+++ b/drivers/mfd/twl4030-power.c
@@ -67,14 +67,22 @@
#define R_KEY_1 0xC0
#define R_KEY_2 0x0C
-/* resource configuration registers */
-
+/* resource configuration registers
+ <RESOURCE>_DEV_GRP at address 'n+0'
+ <RESOURCE>_TYPE at address 'n+1'
+ <RESOURCE>_REMAP at address 'n+2'
+ <RESOURCE>_DEDICATED at address 'n+3'
+*/
#define DEV_GRP_OFFSET 0
#define TYPE_OFFSET 1
/* Bit positions in the registers */
+
+/* <RESOURCE>_DEV_GRP */
#define DEV_GRP_SHIFT 5
#define DEV_GRP_MASK (7 << DEV_GRP_SHIFT)
+
+/* <RESOURCE>_TYPE */
#define TYPE_SHIFT 0
#define TYPE_MASK (7 << TYPE_SHIFT)
#define TYPE2_SHIFT 3