regulator: axp20x: AXP717: Add boost regulator

The AXP717 also contains an adjustable boost regulator, to provide the
5V USB VBUS rail when running on battery.

Add the regulator description that states the voltage range this
regulator can cover.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: John Watts <contact@jookia.org>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Link: https://patch.msgid.link/20240816001824.6028-4-andre.przywara@arm.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/axp20x-regulator.c

@@ -143,6 +143,7 @@
 #define AXP717_DCDC3_NUM_VOLTAGES	103
 #define AXP717_DCDC_V_OUT_MASK		GENMASK(6, 0)
 #define AXP717_LDO_V_OUT_MASK		GENMASK(4, 0)
+#define AXP717_BOOST_V_OUT_MASK		GENMASK(7, 4)
 
 #define AXP803_PWR_OUT_DCDC1_MASK	BIT_MASK(0)
 #define AXP803_PWR_OUT_DCDC2_MASK	BIT_MASK(1)
@@ -834,6 +835,9 @@ static const struct regulator_desc axp717_regulators[] = {
 	AXP_DESC(AXP717, CPUSLDO, "cpusldo", "vin1", 500, 1400, 50,
 		 AXP717_CPUSLDO_CONTROL, AXP717_LDO_V_OUT_MASK,
 		 AXP717_LDO1_OUTPUT_CONTROL, BIT(4)),
+	AXP_DESC(AXP717, BOOST, "boost", "vin1", 4550, 5510, 64,
+		 AXP717_BOOST_CONTROL, AXP717_BOOST_V_OUT_MASK,
+		 AXP717_MODULE_EN_CONTROL_2, BIT(4)),
 };
 
 /* DCDC ranges shared with AXP813 */

include/linux/mfd/axp20x.h

@@ -486,6 +486,7 @@ enum {
 	AXP717_CLDO3,
 	AXP717_CLDO4,
 	AXP717_CPUSLDO,
+	AXP717_BOOST,
 	AXP717_REG_ID_MAX,
 };