linux-kernel - [RFC Patch v3 3/3] add npcm7xx debug counters as sysfs attributes

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Date:   Tue, 21 Dec 2021 09:43:44 -0800
From:   Sui Chen <suichen@...gle.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-i2c@...r.kernel.org, openbmc@...ts.ozlabs.org,
        joel@....id.au, andrew@...id.au, tali.perry1@...il.com,
        benjaminfair@...gle.com, krellan@...gle.com,
        Sui Chen <suichen@...gle.com>
Subject: [RFC Patch v3 3/3] 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@...gle.com>
Reviewed-by: Tali Perry <tali.perry1@...il.com>
---
 drivers/i2c/busses/i2c-npcm7xx.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/i2c/busses/i2c-npcm7xx.c b/drivers/i2c/busses/i2c-npcm7xx.c
index cc7abd0b870be..c3ba5f3d33af1 100644
--- a/drivers/i2c/busses/i2c-npcm7xx.c
+++ b/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;
 }
 
-- 
2.34.1.307.g9b7440fafd-goog