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    Subject[PATCH 2/5] mfd: twl4030-power: Add comments for the register and bit layout
    Date
    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: sameo@linux.intel.com
    Cc: linux-omap@vger.kernel.org
    ---
    drivers/mfd/twl4030-power.c | 12 ++++++++++--
    1 files changed, 10 insertions(+), 2 deletions(-)

    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 @@ static u8 twl4030_start_script_address = 0x2b;
    #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
    --
    1.6.3.3


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