dm: regulator: add implementation of driver model regulator uclass

This commit introduces the implementation of dm regulator API.
Device tree support allows for auto binding. And by the basic
uclass operations, it allows to driving the devices in a common
way. For detailed informations, please look into the header file.

Core files:
- drivers/power/regulator-uclass.c - provides regulator common functions api
- include/power/regulator.h - define all structures required by the regulator

Changes:
- new uclass-id: UCLASS_REGULATOR
- new config: CONFIG_DM_REGULATOR

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
new file mode 100644
index 0000000000..cb1516258a
--- /dev/null
+++ b/drivers/power/regulator/Kconfig
@@ -0,0 +1,17 @@
+config DM_REGULATOR
+	bool "Enable Driver Model for REGULATOR drivers (UCLASS_REGULATOR)"
+	depends on DM
+	---help---
+	This config enables the driver model regulator support.
+	UCLASS_REGULATOR - designed to provide a common API for basic regulator's
+	functions, like get/set Voltage or Current value, enable state, etc...
+	Note:
+	When enabling this, please read the description, found in the files:
+	- 'include/power/pmic.h'
+	- 'include/power/regulator.h'
+	- 'drivers/power/pmic/pmic-uclass.c'
+	- 'drivers/power/pmic/regulator-uclass.c'
+	It's important to call the device_bind() with the proper node offset,
+	when binding the regulator devices. The pmic_bind_childs() can be used
+	for this purpose if PMIC I/O driver is implemented or dm_scan_fdt_node()
+	otherwise. Detailed informations can be found in the header file.