squash! power: supply: macsmc_power: Add CHLS charge thresholds

Prefer CHWA over CHLS since the SMC firmware from iBoot-10151.1.1
(macOS 14.0) is not compatible with our CHGLS usage. It was working
with the SMC firmware from iBoot-10151.121.1 (macOS 14.5).

Signed-off-by: Janne Grunau <j@jannau.net>

Author: jannau

drivers/power/supply/macsmc_power.c

@@ -805,10 +805,14 @@ static int macsmc_power_probe(struct platform_device *pdev)
 	apple_smc_write_u8(power->smc, SMC_KEY(CH0K), 0);
 	apple_smc_write_u8(power->smc, SMC_KEY(CH0B), 0);
 
-	if (apple_smc_read_u16(power->smc, SMC_KEY(CHLS), &vu16) >= 0) {
-		power->has_chls = true;
-	} else if (apple_smc_read_flag(power->smc, SMC_KEY(CHWA)) >= 0) {
+	/*
+	 * Prefer CHWA as the SMC firmware from iBoot-10151.1.1 is not compatible with
+	 * this CHLS usage.
+	 */
+	if (apple_smc_read_flag(power->smc, SMC_KEY(CHWA)) >= 0) {
 		power->has_chwa = true;
+	} else if (apple_smc_read_u16(power->smc, SMC_KEY(CHLS), &vu16) >= 0) {
+		power->has_chls = true;
 	} else {
 		/* Remove the last 2 properties that control the charge threshold */
 		power->batt_desc.num_properties -= 2;