lib: adp536x: remove obsolete ad-hoc regulator API

The Zephyr regulator framework offers now a standard interface for
regulators, so drop the custom ad-hoc implementation and update
documentation.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>

Author: gmarull

doc/nrf/libraries/others/adp536x.rst

@@ -16,6 +16,9 @@ The library accesses the features of the ADP5360 PMIC by conducting Inter-Integr
 Generic read, write, and masked write functions are private to the library.
 The feature-specific functions are available to the user.
 
+.. note::
+   Regulator functionality (BUCK/BUCKBOOST) is exposed using the :ref:`Zephyr regulator API <regulator_api>`.
+
 Supported features
 ==================
 

include/adp536x.h

@@ -154,32 +154,6 @@ int adp536x_oc_chg_hiccup_set(bool enable);
  */
 int adp536x_oc_dis_hiccup_set(bool enable);
 
-/**
- * @brief Enable the buck/boost regulator.
- *
- * @param[in] enable The requested regulator operation state.
- *
- * @retval 0 If the operation was successful.
- *           Otherwise, a (negative) error code is returned.
- */
-int adp536x_buckbst_enable(bool enable);
-
-/**
- * @brief Set the buck regulator to 1.8 V.
- *
- * @retval 0 If the operation was successful.
- *           Otherwise, a (negative) error code is returned.
- */
-int adp536x_buck_1v8_set(void);
-
-/**
- * @brief Set the buck/boost regulator to 3.3 V.
- *
- * @retval 0 If the operation was successful.
- *           Otherwise, a (negative) error code is returned.
- */
-int adp536x_buckbst_3v3_set(void);
-
 /**
  * @brief Reset the device to its default values.
  *
@@ -198,16 +172,6 @@ int adp536x_factory_reset(void);
  */
 int adp536x_oc_chg_current_set(uint8_t value);
 
-/**
- * @brief Set the buck discharge resistor status.
- *
- * @param[in] enable Boolean value to enable or disable the discharge resistor.
- *
- * @retval 0 If the operation was successful.
- *           Otherwise, a (negative) error code is returned.
- */
-int adp536x_buck_discharge_set(bool enable);
-
 /**
  * @brief Set Fuel Gauge operating mode
  *

lib/adp536x/adp536x.c

@@ -30,10 +30,6 @@
 #define ADP536X_VBAT_READ_H				0x25
 #define ADP536X_VBAT_READ_L				0x26
 #define ADP536X_FUEL_GAUGE_MODE				0x27
-#define ADP536X_BUCK_CFG				0x29
-#define ADP536X_BUCK_OUTPUT				0x2A
-#define ADP536X_BUCKBST_CFG				0x2B
-#define ADP536X_BUCKBST_OUTPUT				0x2C
 #define ADP536X_DEFAULT_SET_REG				0x37
 
 /* Manufacturer and model ID register. */
@@ -119,26 +115,6 @@
 #define ADP536X_BAT_OC_CHG_DGT_OC_CHG_MSK		GENMASK(4, 3)
 #define ADP536X_BAT_OC_CHG_DGT_OC_CHG(x)		(((x) & 0x03) << 3)
 
-/* Buck configure register. */
-#define ADP536X_BUCK_CFG_DISCHG_BUCK_MSK		BIT(1)
-#define ADP536X_BUCK_CFG_DISCHG_BUCK(x)			(((x) & 0x01) << 1)
-
-/* Buck output voltage setting register. */
-#define ADP536X_BUCK_OUTPUT_VOUT_BUCK_MSK		GENMASK(5, 0)
-#define ADP536X_BUCK_OUTPUT_VOUT_BUCK(x)		(((x) & 0x3F) << 0)
-#define ADP536X_BUCK_OUTPUT_BUCK_DLY_MSK		GENMASK(7, 6)
-#define ADP536X_BUCK_OUTPUT_BUCK_DLY(x)			(((x) & 0x03) << 6)
-
-/* Buck/boost output voltage setting register. */
-#define ADP536X_BUCKBST_OUTPUT_VOUT_BUCKBST_MSK		GENMASK(5, 0)
-#define ADP536X_BUCKBST_OUTPUT_VOUT_BUCKBST(x)		(((x) & 0x3F) << 0)
-#define ADP536X_BUCKBST_OUT_BUCK_DLY_MSK		GENMASK(7, 6)
-#define ADP536X_BUCKBST_OUT_BUCK_DLY(x)			(((x) & 0x03) << 6)
-
-/* Buck/boost configure register. */
-#define ADP536X_BUCKBST_CFG_EN_BUCKBST_MSK		BIT(0)
-#define ADP536X_BUCKBST_CFG_EN_BUCKBST(x)		(((x) & 0x01) << 0)
-
 /* DEFAULT_SET register. */
 #define ADP536X_DEFAULT_SET_MSK				GENMASK(7, 0)
 #define ADP536X_DEFAULT_SET(x)				(((x) & 0xFF) << 0)
@@ -245,40 +221,6 @@ int adp536x_oc_chg_current_set(uint8_t value)
 					ADP536X_BAT_OC_CHG_OC_CHG(value));
 }
 
-int adp536x_buck_1v8_set(void)
-{
-	/* 1.8V equals to 0b11000 = 0x18 according to ADP536X datasheet. */
-	uint8_t value = 0x18;
-
-	return adp536x_reg_write_mask(ADP536X_BUCK_OUTPUT,
-					ADP536X_BUCK_OUTPUT_VOUT_BUCK_MSK,
-					ADP536X_BUCK_OUTPUT_VOUT_BUCK(value));
-}
-
-int adp536x_buck_discharge_set(bool enable)
-{
-	return adp536x_reg_write_mask(ADP536X_BUCK_CFG,
-				ADP536X_BUCK_CFG_DISCHG_BUCK_MSK,
-				ADP536X_BUCK_CFG_DISCHG_BUCK(enable));
-}
-
-int adp536x_buckbst_3v3_set(void)
-{
-	/* 3.3V equals to 0b10011 = 0x13, according to ADP536X datasheet. */
-	uint8_t value = 0x13;
-
-	return adp536x_reg_write_mask(ADP536X_BUCKBST_OUTPUT,
-				ADP536X_BUCKBST_OUTPUT_VOUT_BUCKBST_MSK,
-				ADP536X_BUCKBST_OUTPUT_VOUT_BUCKBST(value));
-}
-
-int adp536x_buckbst_enable(bool enable)
-{
-	return adp536x_reg_write_mask(ADP536X_BUCKBST_CFG,
-					ADP536X_BUCKBST_CFG_EN_BUCKBST_MSK,
-					ADP536X_BUCKBST_CFG_EN_BUCKBST(enable));
-}
-
 static int adp536x_default_set(void)
 {
 	/* The value 0x7F has to be written to this register to accomplish