wm831x: Factor out WM831x backup battery charger

The backup battery on WM831x is a separate IP block to the main PMU
and is largely unrelated to the main supply functionality. Factor it
out into a separate driver in order to reflect this and better support
future hardware versions.

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

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index cea6cef27e89..783e9b790b02 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -29,6 +29,13 @@ config APM_POWER
           Say Y here to enable support APM status emulation using
           battery class devices.
 
+config WM831X_BACKUP
+        tristate "WM831X backup battery charger support"
+        depends on MFD_WM831X
+        help
+          Say Y here to enable support for the backup battery charger
+          in the Wolfson Microelectronics WM831x PMICs.
+
 config WM831X_POWER
         tristate "WM831X PMU support"
         depends on MFD_WM831X