add npcm7xx debug counters as sysfs attributes

This change adds npcm7xx debug counters as sysfs attributes using the
i2c_adapter_stats_register_counter function.

Signed-off-by: Sui Chen <suichen@google.com>
Reviewed-by: Tali Perry <tali.perry1@gmail.com>

drivers/i2c/busses/i2c-npcm7xx.c

@@ -2228,6 +2228,15 @@ static void npcm_i2c_init_debugfs(struct platform_device *pdev,
 	debugfs_create_u64("timeout_cnt", 0444, d, &bus->timeout_cnt);
 	debugfs_create_u64("tx_complete_cnt", 0444, d, &bus->tx_complete_cnt);
 
+	/* register debug counters in sysfs */
+	i2c_adapter_stats_register_counter(&bus->adap, "ber_cnt", &bus->ber_cnt);
+	i2c_adapter_stats_register_counter(&bus->adap, "nack_cnt", &bus->nack_cnt);
+	i2c_adapter_stats_register_counter(&bus->adap, "rec_succ_cnt", &bus->rec_succ_cnt);
+	i2c_adapter_stats_register_counter(&bus->adap, "rec_fail_cnt", &bus->rec_fail_cnt);
+	i2c_adapter_stats_register_counter(&bus->adap, "timeout_cnt", &bus->timeout_cnt);
+	i2c_adapter_stats_register_counter(&bus->adap, "i2c_speed", &bus->bus_freq);
+	i2c_adapter_stats_register_counter(&bus->adap, "tx_complete_cnt", &bus->tx_complete_cnt);
+
 	bus->debugfs = d;
 }