power: supply: axp288_charger: Round constant_charge_voltage writes down

Round constant_charge_voltage writes down to the first supported lower
value, rather then rounding them up to the first supported higher value.

This fixes e.g. writing 4250000 resulting in a value of 4350000 which
might be dangerous, instead writing 4250000 will now result in a safe
4200000 value.

Fixes: 843735b7 ("power: axp288_charger: axp288 charger driver")
Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20240717200333.56669-2-hdegoede@redhat.comSigned-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

drivers/power/supply/axp288_charger.c

@@ -178,18 +178,18 @@ static inline int axp288_charger_set_cv(struct axp288_chrg_info *info, int cv)
 	u8 reg_val;
 	int ret;
 
-	if (cv <= CV_4100MV) {
-		reg_val = CHRG_CCCV_CV_4100MV;
-		cv = CV_4100MV;
-	} else if (cv <= CV_4150MV) {
-		reg_val = CHRG_CCCV_CV_4150MV;
-		cv = CV_4150MV;
-	} else if (cv <= CV_4200MV) {
+	if (cv >= CV_4350MV) {
+		reg_val = CHRG_CCCV_CV_4350MV;
+		cv = CV_4350MV;
+	} else if (cv >= CV_4200MV) {
 		reg_val = CHRG_CCCV_CV_4200MV;
 		cv = CV_4200MV;
+	} else if (cv >= CV_4150MV) {
+		reg_val = CHRG_CCCV_CV_4150MV;
+		cv = CV_4150MV;
 	} else {
-		reg_val = CHRG_CCCV_CV_4350MV;
-		cv = CV_4350MV;
+		reg_val = CHRG_CCCV_CV_4100MV;
+		cv = CV_4100MV;
 	}
 
 	reg_val = reg_val << CHRG_CCCV_CV_BIT_POS;