linux-kernel - [PATCH v2 29/31] i2c: fsi: Define a function to check status error bits

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Message-Id: <20240226165321.91976-30-eajames@linux.ibm.com>
Date: Mon, 26 Feb 2024 10:53:19 -0600
From: Eddie James <eajames@...ux.ibm.com>
To: linux-fsi@...ts.ozlabs.org
Cc: linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org,
        devicetree@...r.kernel.org, andi.shyti@...nel.org,
        eajames@...ux.ibm.com, alistair@...ple.id.au, joel@....id.au,
        jk@...abs.org, robh@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, lakshmiy@...ibmcom
Subject: [PATCH v2 29/31] i2c: fsi: Define a function to check status error bits

This will be used more than once with interrupt support, so split
the error bit checks into a function.

Signed-off-by: Eddie James <eajames@...ux.ibm.com>
---
 drivers/i2c/busses/i2c-fsi.c | 38 ++++++++++++++++++++----------------
 1 file changed, 21 insertions(+), 17 deletions(-)

diff --git a/drivers/i2c/busses/i2c-fsi.c b/drivers/i2c/busses/i2c-fsi.c
index 096dc7e2369f..5f524fb6f0f8 100644
--- a/drivers/i2c/busses/i2c-fsi.c
+++ b/drivers/i2c/busses/i2c-fsi.c
@@ -507,6 +507,26 @@ static int fsi_i2c_abort(struct fsi_i2c_port *port, u32 status)
 	return -ETIMEDOUT;
 }
 
+static int fsi_i2c_error_status_to_rc(u32 status)
+{
+	if (status & I2C_STAT_INV_CMD)
+		return -EINVAL;
+
+	if (status & (I2C_STAT_PARITY | I2C_STAT_BE_OVERRUN | I2C_STAT_BE_ACCESS))
+		return -EPROTO;
+
+	if (status & I2C_STAT_NACK)
+		return -ENXIO;
+
+	if (status & I2C_STAT_LOST_ARB)
+		return -EAGAIN;
+
+	if (status & I2C_STAT_STOP_ERR)
+		return -EBADMSG;
+
+	return -EIO;
+}
+
 static int fsi_i2c_handle_status(struct fsi_i2c_port *port,
 				 struct i2c_msg *msg, u32 status)
 {
@@ -518,23 +538,7 @@ static int fsi_i2c_handle_status(struct fsi_i2c_port *port,
 		if (rc)
 			return rc;
 
-		if (status & I2C_STAT_INV_CMD)
-			return -EINVAL;
-
-		if (status & (I2C_STAT_PARITY | I2C_STAT_BE_OVERRUN |
-		    I2C_STAT_BE_ACCESS))
-			return -EPROTO;
-
-		if (status & I2C_STAT_NACK)
-			return -ENXIO;
-
-		if (status & I2C_STAT_LOST_ARB)
-			return -EAGAIN;
-
-		if (status & I2C_STAT_STOP_ERR)
-			return -EBADMSG;
-
-		return -EIO;
+		return fsi_i2c_error_status_to_rc(status);
 	}
 
 	if (status & I2C_STAT_DAT_REQ) {
-- 
2.39.3