regulator: mcp16502: adapt for get/set on other registers

MCP16502 have multiple registers for each regulator (as described
in enum mcp16502_reg). Adapt the code to be able to get/set all these
registers. This is necessary for the following commits.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/1605280870-32432-5-git-send-email-claudiu.beznea@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/mcp16502.c

@@ -54,13 +54,9 @@
  * This function is useful for iterating over all regulators and accessing their
  * registers in a generic way or accessing a regulator device by its id.
  */
-#define MCP16502_BASE(i) (((i) + 1) << 4)
+#define MCP16502_REG_BASE(i, r) ((((i) + 1) << 4) + MCP16502_REG_##r)
 #define MCP16502_STAT_BASE(i) ((i) + 5)
 
-#define MCP16502_OFFSET_MODE_A 0
-#define MCP16502_OFFSET_MODE_LPM 1
-#define MCP16502_OFFSET_MODE_HIB 2
-
 #define MCP16502_OPMODE_ACTIVE REGULATOR_MODE_NORMAL
 #define MCP16502_OPMODE_LPM REGULATOR_MODE_IDLE
 #define MCP16502_OPMODE_HIB REGULATOR_MODE_STANDBY
@@ -75,6 +71,23 @@
 #define MCP16502_MIN_REG 0x0
 #define MCP16502_MAX_REG 0x65
 
+/**
+ * enum mcp16502_reg - MCP16502 regulators's registers
+ * @MCP16502_REG_A: active state register
+ * @MCP16502_REG_LPM: low power mode state register
+ * @MCP16502_REG_HIB: hibernate state register
+ * @MCP16502_REG_SEQ: startup sequence register
+ * @MCP16502_REG_CFG: configuration register
+ */
+enum mcp16502_reg {
+	MCP16502_REG_A,
+	MCP16502_REG_LPM,
+	MCP16502_REG_HIB,
+	MCP16502_REG_HPM,
+	MCP16502_REG_SEQ,
+	MCP16502_REG_CFG,
+};
+
 static unsigned int mcp16502_of_map_mode(unsigned int mode)
 {
 	if (mode == REGULATOR_MODE_NORMAL || mode == REGULATOR_MODE_IDLE)
@@ -144,22 +157,20 @@ static void mcp16502_gpio_set_mode(struct mcp16502 *mcp, int mode)
 }
 
 /*
- * mcp16502_get_reg() - get the PMIC's configuration register for opmode
+ * mcp16502_get_reg() - get the PMIC's state configuration register for opmode
  *
  * @rdev: the regulator whose register we are searching
  * @opmode: the PMIC's operating mode ACTIVE, Low-power, Hibernate
  */
-static int mcp16502_get_reg(struct regulator_dev *rdev, int opmode)
+static int mcp16502_get_state_reg(struct regulator_dev *rdev, int opmode)
 {
-	int reg = MCP16502_BASE(rdev_get_id(rdev));
-
 	switch (opmode) {
 	case MCP16502_OPMODE_ACTIVE:
-		return reg + MCP16502_OFFSET_MODE_A;
+		return MCP16502_REG_BASE(rdev_get_id(rdev), A);
 	case MCP16502_OPMODE_LPM:
-		return reg + MCP16502_OFFSET_MODE_LPM;
+		return MCP16502_REG_BASE(rdev_get_id(rdev), LPM);
 	case MCP16502_OPMODE_HIB:
-		return reg + MCP16502_OFFSET_MODE_HIB;
+		return MCP16502_REG_BASE(rdev_get_id(rdev), HIB);
 	default:
 		return -EINVAL;
 	}
@@ -179,7 +190,7 @@ static unsigned int mcp16502_get_mode(struct regulator_dev *rdev)
 	unsigned int val;
 	int ret, reg;
 
-	reg = mcp16502_get_reg(rdev, MCP16502_OPMODE_ACTIVE);
+	reg = mcp16502_get_state_reg(rdev, MCP16502_OPMODE_ACTIVE);
 	if (reg < 0)
 		return reg;
 
@@ -210,7 +221,7 @@ static int _mcp16502_set_mode(struct regulator_dev *rdev, unsigned int mode,
 	int val;
 	int reg;
 
-	reg = mcp16502_get_reg(rdev, op_mode);
+	reg = mcp16502_get_state_reg(rdev, op_mode);
 	if (reg < 0)
 		return reg;
 
@@ -269,10 +280,10 @@ static int mcp16502_suspend_get_target_reg(struct regulator_dev *rdev)
 {
 	switch (pm_suspend_target_state) {
 	case PM_SUSPEND_STANDBY:
-		return mcp16502_get_reg(rdev, MCP16502_OPMODE_LPM);
+		return mcp16502_get_state_reg(rdev, MCP16502_OPMODE_LPM);
 	case PM_SUSPEND_ON:
 	case PM_SUSPEND_MEM:
-		return mcp16502_get_reg(rdev, MCP16502_OPMODE_HIB);
+		return mcp16502_get_state_reg(rdev, MCP16502_OPMODE_HIB);
 	default:
 		dev_err(&rdev->dev, "invalid suspend target: %d\n",
 			pm_suspend_target_state);