dm: pmic: add s2mps11 PMIC I/O driver

This driver allows I/O operations on the Samsung S2MPS11 PMIC,
which provides lots of LDO/BUCK outputs.

To enable it, update defconfig with:
- CONFIG_PMIC_S2MPS11
and additional, if were not defined:
- CONFIG_CMD_PMIC
- CONFIG_ERRNO_STR

The binding info: doc/device-tree-bindings/pmic/s2mps11.txt

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Anand Moon <linux.amoon@gmail.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/include/power/s2mps11.h b/include/power/s2mps11.h
new file mode 100644
index 0000000..5da4719
--- /dev/null
+++ b/include/power/s2mps11.h
@@ -0,0 +1,109 @@
+#ifndef __S2MPS11__H__
+#define __S2MPS11__H__
+
+enum s2mps11_reg {
+	S2MPS11_REG_ID = 0,
+	S2MPS11_REG_INT1,
+	S2MPS11_REG_INT2,
+	S2MPS11_REG_INT3,
+	S2MPS11_REG_INT1M,
+	S2MPS11_REG_INT2M,
+	S2MPS11_REG_INT3M,
+	S2MPS11_REG_STATUS1,
+	S2MPS11_REG_STATUS2,
+	S2MPS11_REG_OFFSRC,
+	S2MPS11_REG_PWRONSRC,
+	S2MPS11_REG_RTC_CTRL,
+	S2MPS11_REG_CTRL1,
+	S2MPS11_REG_ETC_TEST,
+	S2MPS11_REG_RSVD3,
+	S2MPS11_REG_BU_CHG,
+	S2MPS11_REG_RAMP,
+	S2MPS11_REG_RAMP_BUCK,
+	S2MPS11_REG_LDO1_8,
+	S2MPS11_REG_LDO9_16,
+	S2MPS11_REG_LDO17_24,
+	S2MPS11_REG_LDO25_32,
+	S2MPS11_REG_LDO33_38,
+	S2MPS11_REG_LDO1_8_OVC,
+	S2MPS11_REG_LDO9_16_OVC,
+	S2MPS11_REG_LDO17_24_OVC,
+	S2MPS11_REG_LDO25_32_OVC,
+	S2MPS11_REG_LDO33_38_OVC,
+	S2MPS11_REG_RESERVED1,
+	S2MPS11_REG_RESERVED2,
+	S2MPS11_REG_RESERVED3,
+	S2MPS11_REG_RESERVED4,
+	S2MPS11_REG_RESERVED5,
+	S2MPS11_REG_RESERVED6,
+	S2MPS11_REG_RESERVED7,
+	S2MPS11_REG_RESERVED8,
+	S2MPS11_REG_WDRSTEN_CTRL,
+	S2MPS11_REG_B1CTRL1,
+	S2MPS11_REG_B1CTRL2,
+	S2MPS11_REG_B2CTRL1,
+	S2MPS11_REG_B2CTRL2,
+	S2MPS11_REG_B3CTRL1,
+	S2MPS11_REG_B3CTRL2,
+	S2MPS11_REG_B4CTRL1,
+	S2MPS11_REG_B4CTRL2,
+	S2MPS11_REG_B5CTRL1,
+	S2MPS11_REG_BUCK5_SW,
+	S2MPS11_REG_B5CTRL2,
+	S2MPS11_REG_B5CTRL3,
+	S2MPS11_REG_B5CTRL4,
+	S2MPS11_REG_B5CTRL5,
+	S2MPS11_REG_B6CTRL1,
+	S2MPS11_REG_B6CTRL2,
+	S2MPS11_REG_B7CTRL1,
+	S2MPS11_REG_B7CTRL2,
+	S2MPS11_REG_B8CTRL1,
+	S2MPS11_REG_B8CTRL2,
+	S2MPS11_REG_B9CTRL1,
+	S2MPS11_REG_B9CTRL2,
+	S2MPS11_REG_B10CTRL1,
+	S2MPS11_REG_B10CTRL2,
+	S2MPS11_REG_L1CTRL,
+	S2MPS11_REG_L2CTRL,
+	S2MPS11_REG_L3CTRL,
+	S2MPS11_REG_L4CTRL,
+	S2MPS11_REG_L5CTRL,
+	S2MPS11_REG_L6CTRL,
+	S2MPS11_REG_L7CTRL,
+	S2MPS11_REG_L8CTRL,
+	S2MPS11_REG_L9CTRL,
+	S2MPS11_REG_L10CTRL,
+	S2MPS11_REG_L11CTRL,
+	S2MPS11_REG_L12CTRL,
+	S2MPS11_REG_L13CTRL,
+	S2MPS11_REG_L14CTRL,
+	S2MPS11_REG_L15CTRL,
+	S2MPS11_REG_L16CTRL,
+	S2MPS11_REG_L17CTRL,
+	S2MPS11_REG_L18CTRL,
+	S2MPS11_REG_L19CTRL,
+	S2MPS11_REG_L20CTRL,
+	S2MPS11_REG_L21CTRL,
+	S2MPS11_REG_L22CTRL,
+	S2MPS11_REG_L23CTRL,
+	S2MPS11_REG_L24CTRL,
+	S2MPS11_REG_L25CTRL,
+	S2MPS11_REG_L26CTRL,
+	S2MPS11_REG_L27CTRL,
+	S2MPS11_REG_L28CTRL,
+	S2MPS11_REG_L29CTRL,
+	S2MPS11_REG_L30CTRL,
+	S2MPS11_REG_L31CTRL,
+	S2MPS11_REG_L32CTRL,
+	S2MPS11_REG_L33CTRL,
+	S2MPS11_REG_L34CTRL,
+	S2MPS11_REG_L35CTRL,
+	S2MPS11_REG_L36CTRL,
+	S2MPS11_REG_L37CTRL,
+	S2MPS11_REG_L38CTRL,
+	S2MPS11_REG_COUNT,
+};
+
+#define S2MPS11_LDO26_ENABLE	0xec
+
+#endif