linux-kernel - [PATCH 2/2] hwmon: (pmbus) add MFR

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Date:   Wed, 20 Apr 2022 12:22:00 +0000
From:   Adam Wujek <dev_public@...ek.eu>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Adam Wujek <dev_public@...ek.eu>,
        Guenter Roeck <linux@...ck-us.net>,
        Jean Delvare <jdelvare@...e.com>, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] hwmon: (pmbus) add MFR_* registers to debugfs

Add registers to debugfs:
PMBUS_MFR_ID
PMBUS_MFR_MODEL
PMBUS_MFR_REVISION
PMBUS_MFR_LOCATION
PMBUS_MFR_DATE
PMBUS_MFR_SERIAL

Signed-off-by: Adam Wujek <dev_public@...ek.eu>
---
 drivers/hwmon/pmbus/pmbus_core.c | 84 ++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)

diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
index 0af7a3d74f47..1dc186780ccf 100644
--- a/drivers/hwmon/pmbus/pmbus_core.c
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -2625,6 +2625,30 @@ static int pmbus_debugfs_get_status(void *data, u64 *val)
 DEFINE_DEBUGFS_ATTRIBUTE(pmbus_debugfs_ops_status, pmbus_debugfs_get_status,
 			 NULL, "0x%04llx\n");

+static ssize_t pmbus_debugfs_mfr_read(struct file *file, char __user *buf,
+				       size_t count, loff_t *ppos)
+{
+	int rc;
+	struct pmbus_debugfs_entry *entry = file->private_data;
+	char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
+
+	rc = i2c_smbus_read_block_data(entry->client, entry->reg, data);
+	if (rc < 0)
+		return rc;
+
+	data[rc] = '\n';
+	rc += 2;
+
+	return simple_read_from_buffer(buf, count, ppos, data, rc);
+}
+
+static const struct file_operations pmbus_debugfs_ops_mfr = {
+	.llseek = noop_llseek,
+	.read = pmbus_debugfs_mfr_read,
+	.write = NULL,
+	.open = simple_open,
+};
+
 static int pmbus_debugfs_get_pec(void *data, u64 *val)
 {
 	struct i2c_client *client = data;
@@ -2801,6 +2825,66 @@ static int pmbus_init_debugfs(struct i2c_client *client,
 					    &entries[idx++],
 					    &pmbus_debugfs_ops);
 		}
+
+		if (pmbus_check_byte_register(client, i, PMBUS_MFR_ID)) {
+			entries[idx].client = client;
+			entries[idx].page = i;
+			entries[idx].reg = PMBUS_MFR_ID;
+			scnprintf(name, PMBUS_NAME_SIZE, "mfr%d_id", i);
+			debugfs_create_file(name, 0444, data->debugfs,
+					    &entries[idx++],
+					    &pmbus_debugfs_ops_mfr);
+		}
+
+		if (pmbus_check_byte_register(client, i, PMBUS_MFR_MODEL)) {
+			entries[idx].client = client;
+			entries[idx].page = i;
+			entries[idx].reg = PMBUS_MFR_MODEL;
+			scnprintf(name, PMBUS_NAME_SIZE, "mfr%d_model", i);
+			debugfs_create_file(name, 0444, data->debugfs,
+					    &entries[idx++],
+					    &pmbus_debugfs_ops_mfr);
+		}
+
+		if (pmbus_check_byte_register(client, i, PMBUS_MFR_REVISION)) {
+			entries[idx].client = client;
+			entries[idx].page = i;
+			entries[idx].reg = PMBUS_MFR_REVISION;
+			scnprintf(name, PMBUS_NAME_SIZE, "mfr%d_revision", i);
+			debugfs_create_file(name, 0444, data->debugfs,
+					    &entries[idx++],
+					    &pmbus_debugfs_ops_mfr);
+		}
+
+		if (pmbus_check_byte_register(client, i, PMBUS_MFR_LOCATION)) {
+			entries[idx].client = client;
+			entries[idx].page = i;
+			entries[idx].reg = PMBUS_MFR_LOCATION;
+			scnprintf(name, PMBUS_NAME_SIZE, "mfr%d_location", i);
+			debugfs_create_file(name, 0444, data->debugfs,
+					    &entries[idx++],
+					    &pmbus_debugfs_ops_mfr);
+		}
+
+		if (pmbus_check_byte_register(client, i, PMBUS_MFR_DATE)) {
+			entries[idx].client = client;
+			entries[idx].page = i;
+			entries[idx].reg = PMBUS_MFR_DATE;
+			scnprintf(name, PMBUS_NAME_SIZE, "mfr%d_date", i);
+			debugfs_create_file(name, 0444, data->debugfs,
+					    &entries[idx++],
+					    &pmbus_debugfs_ops_mfr);
+		}
+
+		if (pmbus_check_byte_register(client, i, PMBUS_MFR_SERIAL)) {
+			entries[idx].client = client;
+			entries[idx].page = i;
+			entries[idx].reg = PMBUS_MFR_SERIAL;
+			scnprintf(name, PMBUS_NAME_SIZE, "mfr%d_serial", i);
+			debugfs_create_file(name, 0444, data->debugfs,
+					    &entries[idx++],
+					    &pmbus_debugfs_ops_mfr);
+		}
 	}

 	return devm_add_action_or_reset(data->dev,
--
2.25.1