linux-kernel - [PATCH] hwmon: (pmbus) allow to use a custom read_byte_data function for PMBUS

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Message-ID: <20220419215149.309760-1-dev_public@wujek.eu>
Date:   Tue, 19 Apr 2022 21:52:10 +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] hwmon: (pmbus) allow to use a custom read_byte_data function for PMBUS_CAPABILITY

Some devices returns a wrong value in PMBUS_CAPABILITY register.
Allow the use of read_byte_data function defined in a driver for
a specific device.

Signed-off-by: Adam Wujek <dev_public@...ek.eu>
---
 drivers/hwmon/pmbus/pmbus_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
index f8ca36759b0a..ef9989be8f89 100644
--- a/drivers/hwmon/pmbus/pmbus_core.c
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -2011,7 +2011,7 @@ static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data,
 	}

 	/* Enable PEC if the controller supports it */
-	ret = i2c_smbus_read_byte_data(client, PMBUS_CAPABILITY);
+	ret = _pmbus_read_byte_data(client, -1, PMBUS_CAPABILITY);
 	if (ret >= 0 && (ret & PB_CAPABILITY_ERROR_CHECK))
 		client->flags |= I2C_CLIENT_PEC;
 	else
--
2.17.1