Dump all known registers of the SMB1360 battery/charging chip.
The same output can be generated with the mainline driver which allows verifying
if all the registers are set correctly.

diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index b8ae7ae0ef7..b88d1905a3c 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -1,6 +1,7 @@
 ccflags-$(CONFIG_POWER_SUPPLY_DEBUG) := -DDEBUG

 power_supply-y				:= power_supply_core.o
+power_supply-y				+= smb1360-dump.o
 power_supply-$(CONFIG_SYSFS)		+= power_supply_sysfs.o
 power_supply-$(CONFIG_LEDS_TRIGGERS)	+= power_supply_leds.o

diff --git a/drivers/power/smb1360-charger-fg.c b/drivers/power/smb1360-charger-fg.c
index 7931b6df9be..249b9825550 100644
--- a/drivers/power/smb1360-charger-fg.c
+++ b/drivers/power/smb1360-charger-fg.c
@@ -4347,12 +4347,50 @@ static int smb1360_hw_init(struct smb1360_chip *chip)
 	return rc;
 }

+extern void smb1360_dump(struct i2c_client *client);
+extern void smb1360_dump_fg_scratch(struct i2c_client *fg_client);
+extern void smb1360_dump_fg(struct i2c_client *client);
+
+static void smb1360_dump_locked(struct smb1360_chip *chip)
+{
+	mutex_lock(&chip->read_write_lock);
+	smb1360_dump(chip->client);
+	mutex_unlock(&chip->read_write_lock);
+}
+
+static void smb1360_dump_fg_access(struct smb1360_chip *chip)
+{
+	int ret;
+
+	ret = smb1360_enable_fg_access(chip);
+	if (ret)
+		return;
+
+	mutex_lock(&chip->read_write_lock);
+	smb1360_dump_fg_scratch(chip->client);
+
+	/* Do cool hacks to access FG I2C address instead */
+	chip->fg_access_type = FG_ACCESS_CFG;
+	smb1360_select_fg_i2c_address(chip);
+
+	chip->client->addr = chip->fg_i2c_addr;
+	smb1360_dump_fg(chip->client);
+	chip->client->addr = chip->default_i2c_addr;
+	mutex_unlock(&chip->read_write_lock);
+
+	smb1360_disable_fg_access(chip);
+	smb1360_check_cycle_stretch(chip);
+}
+
 static int smb1360_delayed_hw_init(struct smb1360_chip *chip)
 {
 	int rc;

 	pr_debug("delayed hw init start!\n");

+	/* Dump initial FG registers */
+	smb1360_dump_fg_access(chip);
+
 	if (chip->otp_hard_jeita_config) {
 		rc = smb1360_hard_jeita_otp_init(chip);
 		if (rc) {
@@ -4386,6 +4424,10 @@ static int smb1360_delayed_hw_init(struct smb1360_chip *chip)
 	}

 	pr_debug("delayed hw init complete!\n");
+
+	/* Dump final registers */
+	smb1360_dump_locked(chip);
+	smb1360_dump_fg_access(chip);
 	return rc;
 }

@@ -4945,6 +4987,9 @@ static int smb1360_probe(struct i2c_client *client,
 		INIT_WORK(&chip->jeita_hysteresis_work,
 				smb1360_jeita_hysteresis_work);

+	/* Dump initial registers */
+	smb1360_dump_locked(chip);
+
 	pr_debug("default_i2c_addr=%x\n", chip->default_i2c_addr);
 	smb1360_otp_backup_pool_init(chip);
 	rc = smb1360_hw_init(chip);