diff mbox series

[v2,26/31] i2c: fsi: Improve formatting

Message ID 20240226165321.91976-27-eajames@linux.ibm.com
State New
Headers show
Series fsi: Interrupt support | expand

Commit Message

Eddie James Feb. 26, 2024, 4:53 p.m. UTC 
No functional change.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
---
 drivers/i2c/busses/i2c-fsi.c | 125 +++++++++++++++++------------------
 1 file changed, 60 insertions(+), 65 deletions(-)

Comments

Andi Shyti April 15, 2024, 10:13 p.m. UTC | #1 
On Mon, Feb 26, 2024 at 10:53:16AM -0600, Eddie James wrote:
> No functional change.

Lazy log, lazy log, a coder’s brief epilogue.

Please explain.

I'm not going any further at reviewing this series. Please, make
sure in v3 to write proper logs so that reviewers can understand
what you are doing before reading the code. Cleanup, run
checkpatch, etc. etc.

Thanks,
Andi
diff mbox series

Patch

diff --git a/drivers/i2c/busses/i2c-fsi.c b/drivers/i2c/busses/i2c-fsi.c
index eaecf156ac31..bc44cad49ef2 100644
--- a/drivers/i2c/busses/i2c-fsi.c
+++ b/drivers/i2c/busses/i2c-fsi.c
@@ -148,10 +148,10 @@ 
 
 struct fsi_i2c_master {
 	struct fsi_device	*fsi;
-	u8			fifo_size;
 	struct list_head	ports;
 	struct mutex		lock;
 	u32			clock_div;
+	u8			fifo_size;
 };
 
 struct fsi_i2c_port {
@@ -165,15 +165,14 @@  struct fsi_i2c_port {
 static int fsi_i2c_read_reg(struct fsi_device *fsi, unsigned int reg,
 			    u32 *data)
 {
-	int rc;
 	__be32 data_be;
+	int rc;
 
 	rc = fsi_device_read(fsi, reg, &data_be, sizeof(data_be));
 	if (rc)
 		return rc;
 
 	*data = be32_to_cpu(data_be);
-
 	return 0;
 }
 
@@ -187,9 +186,11 @@  static int fsi_i2c_write_reg(struct fsi_device *fsi, unsigned int reg,
 
 static int fsi_i2c_dev_init(struct fsi_i2c_master *i2c)
 {
-	int rc;
-	u32 mode = I2C_MODE_ENHANCED, extended_status, watermark;
+	u32 mode = I2C_MODE_ENHANCED;
+	u32 extended_status;
 	u32 interrupt = 0;
+	u32 watermark;
+	int rc;
 
 	/* since we use polling, disable interrupts */
 	rc = fsi_i2c_write_reg(i2c->fsi, I2C_FSI_INT_MASK, &interrupt);
@@ -215,9 +216,10 @@  static int fsi_i2c_dev_init(struct fsi_i2c_master *i2c)
 
 static int fsi_i2c_set_port(struct fsi_i2c_port *port)
 {
-	int rc;
 	struct fsi_device *fsi = port->master->fsi;
-	u32 mode, dummy = 0;
+	u32 dummy = 0;
+	u32 mode;
+	int rc;
 
 	rc = fsi_i2c_read_reg(fsi, I2C_FSI_MODE, &mode);
 	if (rc)
@@ -238,7 +240,6 @@  static int fsi_i2c_set_port(struct fsi_i2c_port *port)
 static int fsi_i2c_start(struct fsi_i2c_port *port, struct i2c_msg *msg,
 			 bool stop)
 {
-	struct fsi_i2c_master *i2c = port->master;
 	u32 cmd = I2C_CMD_WITH_START | I2C_CMD_WITH_ADDR;
 
 	port->xfrd = 0;
@@ -252,7 +253,7 @@  static int fsi_i2c_start(struct fsi_i2c_port *port, struct i2c_msg *msg,
 	cmd |= FIELD_PREP(I2C_CMD_ADDR, msg->addr);
 	cmd |= FIELD_PREP(I2C_CMD_LEN, msg->len);
 
-	return fsi_i2c_write_reg(i2c->fsi, I2C_FSI_CMD, &cmd);
+	return fsi_i2c_write_reg(port->master->fsi, I2C_FSI_CMD, &cmd);
 }
 
 static int fsi_i2c_get_op_bytes(int op_bytes)
@@ -268,18 +269,17 @@  static int fsi_i2c_get_op_bytes(int op_bytes)
 static int fsi_i2c_write_fifo(struct fsi_i2c_port *port, struct i2c_msg *msg,
 			      u8 fifo_count)
 {
+	int bytes_to_write = port->master->fifo_size - fifo_count;
+	int bytes_remaining = msg->len - port->xfrd;
 	int write;
 	int rc;
-	struct fsi_i2c_master *i2c = port->master;
-	int bytes_to_write = i2c->fifo_size - fifo_count;
-	int bytes_remaining = msg->len - port->xfrd;
 
 	bytes_to_write = min(bytes_to_write, bytes_remaining);
 
 	while (bytes_to_write) {
 		write = fsi_i2c_get_op_bytes(bytes_to_write);
 
-		rc = fsi_device_write(i2c->fsi, I2C_FSI_FIFO,
+		rc = fsi_device_write(port->master->fsi, I2C_FSI_FIFO,
 				      &msg->buf[port->xfrd], write);
 		if (rc)
 			return rc;
@@ -294,12 +294,11 @@  static int fsi_i2c_write_fifo(struct fsi_i2c_port *port, struct i2c_msg *msg,
 static int fsi_i2c_read_fifo(struct fsi_i2c_port *port, struct i2c_msg *msg,
 			     u8 fifo_count)
 {
-	int read;
-	int rc;
-	struct fsi_i2c_master *i2c = port->master;
-	int bytes_to_read;
 	int xfr_remaining = msg->len - port->xfrd;
+	int bytes_to_read;
 	u32 dummy;
+	int read;
+	int rc;
 
 	bytes_to_read = min_t(int, fifo_count, xfr_remaining);
 
@@ -307,7 +306,7 @@  static int fsi_i2c_read_fifo(struct fsi_i2c_port *port, struct i2c_msg *msg,
 		read = fsi_i2c_get_op_bytes(bytes_to_read);
 
 		if (xfr_remaining) {
-			rc = fsi_device_read(i2c->fsi, I2C_FSI_FIFO,
+			rc = fsi_device_read(port->master->fsi, I2C_FSI_FIFO,
 					     &msg->buf[port->xfrd], read);
 			if (rc)
 				return rc;
@@ -316,8 +315,8 @@  static int fsi_i2c_read_fifo(struct fsi_i2c_port *port, struct i2c_msg *msg,
 			xfr_remaining -= read;
 		} else {
 			/* no more buffer but data in fifo, need to clear it */
-			rc = fsi_device_read(i2c->fsi, I2C_FSI_FIFO, &dummy,
-					     read);
+			rc = fsi_device_read(port->master->fsi, I2C_FSI_FIFO,
+					     &dummy, read);
 			if (rc)
 				return rc;
 		}
@@ -330,85 +329,80 @@  static int fsi_i2c_read_fifo(struct fsi_i2c_port *port, struct i2c_msg *msg,
 
 static int fsi_i2c_get_scl(struct i2c_adapter *adap)
 {
-	u32 stat = 0;
 	struct fsi_i2c_port *port = adap->algo_data;
-	struct fsi_i2c_master *i2c = port->master;
+	u32 stat;
 
-	fsi_i2c_read_reg(i2c->fsi, I2C_FSI_STAT, &stat);
+	fsi_i2c_read_reg(port->master->fsi, I2C_FSI_STAT, &stat);
 
 	return !!(stat & I2C_STAT_SCL_IN);
 }
 
 static void fsi_i2c_set_scl(struct i2c_adapter *adap, int val)
 {
-	u32 dummy = 0;
 	struct fsi_i2c_port *port = adap->algo_data;
-	struct fsi_i2c_master *i2c = port->master;
+	u32 dummy = 0;
 
 	if (val)
-		fsi_i2c_write_reg(i2c->fsi, I2C_FSI_SET_SCL, &dummy);
+		fsi_i2c_write_reg(port->master->fsi, I2C_FSI_SET_SCL, &dummy);
 	else
-		fsi_i2c_write_reg(i2c->fsi, I2C_FSI_RESET_SCL, &dummy);
+		fsi_i2c_write_reg(port->master->fsi, I2C_FSI_RESET_SCL, &dummy);
 }
 
 static int fsi_i2c_get_sda(struct i2c_adapter *adap)
 {
-	u32 stat = 0;
 	struct fsi_i2c_port *port = adap->algo_data;
-	struct fsi_i2c_master *i2c = port->master;
+	u32 stat;
 
-	fsi_i2c_read_reg(i2c->fsi, I2C_FSI_STAT, &stat);
+	fsi_i2c_read_reg(port->master->fsi, I2C_FSI_STAT, &stat);
 
 	return !!(stat & I2C_STAT_SDA_IN);
 }
 
 static void fsi_i2c_set_sda(struct i2c_adapter *adap, int val)
 {
-	u32 dummy = 0;
 	struct fsi_i2c_port *port = adap->algo_data;
-	struct fsi_i2c_master *i2c = port->master;
+	u32 dummy = 0;
 
 	if (val)
-		fsi_i2c_write_reg(i2c->fsi, I2C_FSI_SET_SDA, &dummy);
+		fsi_i2c_write_reg(port->master->fsi, I2C_FSI_SET_SDA, &dummy);
 	else
-		fsi_i2c_write_reg(i2c->fsi, I2C_FSI_RESET_SDA, &dummy);
+		fsi_i2c_write_reg(port->master->fsi, I2C_FSI_RESET_SDA, &dummy);
 }
 
 static void fsi_i2c_prepare_recovery(struct i2c_adapter *adap)
 {
-	int rc;
-	u32 mode;
 	struct fsi_i2c_port *port = adap->algo_data;
-	struct fsi_i2c_master *i2c = port->master;
+	u32 mode;
+	int rc;
 
-	rc = fsi_i2c_read_reg(i2c->fsi, I2C_FSI_MODE, &mode);
+	rc = fsi_i2c_read_reg(port->master->fsi, I2C_FSI_MODE, &mode);
 	if (rc)
 		return;
 
 	mode |= I2C_MODE_DIAG;
-	fsi_i2c_write_reg(i2c->fsi, I2C_FSI_MODE, &mode);
+	fsi_i2c_write_reg(port->master->fsi, I2C_FSI_MODE, &mode);
 }
 
 static void fsi_i2c_unprepare_recovery(struct i2c_adapter *adap)
 {
-	int rc;
-	u32 mode;
 	struct fsi_i2c_port *port = adap->algo_data;
-	struct fsi_i2c_master *i2c = port->master;
+	u32 mode;
+	int rc;
 
-	rc = fsi_i2c_read_reg(i2c->fsi, I2C_FSI_MODE, &mode);
+	rc = fsi_i2c_read_reg(port->master->fsi, I2C_FSI_MODE, &mode);
 	if (rc)
 		return;
 
 	mode &= ~I2C_MODE_DIAG;
-	fsi_i2c_write_reg(i2c->fsi, I2C_FSI_MODE, &mode);
+	fsi_i2c_write_reg(port->master->fsi, I2C_FSI_MODE, &mode);
 }
 
 static int fsi_i2c_reset_bus(struct fsi_i2c_master *i2c,
 			     struct fsi_i2c_port *port)
 {
+	u32 dummy = 0;
+	u32 stat;
 	int rc;
-	u32 stat, dummy = 0;
 
 	/* force bus reset, ignore errors */
 	i2c_recover_bus(&port->adapter);
@@ -439,8 +433,9 @@  static int fsi_i2c_reset_bus(struct fsi_i2c_master *i2c,
 
 static int fsi_i2c_reset_engine(struct fsi_i2c_master *i2c, u16 port)
 {
+	u32 dummy = 0;
+	u32 mode;
 	int rc;
-	u32 mode, dummy = 0;
 
 	/* reset engine */
 	rc = fsi_i2c_write_reg(i2c->fsi, I2C_FSI_RESET_I2C, &dummy);
@@ -476,18 +471,17 @@  static int fsi_i2c_reset_engine(struct fsi_i2c_master *i2c, u16 port)
 
 static int fsi_i2c_abort(struct fsi_i2c_port *port, u32 status)
 {
-	int rc;
-	unsigned long start;
+	struct fsi_i2c_master *i2c = port->master;
 	u32 cmd = I2C_CMD_WITH_STOP;
+	unsigned long start;
 	u32 stat;
-	struct fsi_i2c_master *i2c = port->master;
-	struct fsi_device *fsi = i2c->fsi;
+	int rc;
 
 	rc = fsi_i2c_reset_engine(i2c, port->port);
 	if (rc)
 		return rc;
 
-	rc = fsi_i2c_read_reg(fsi, I2C_FSI_STAT, &stat);
+	rc = fsi_i2c_read_reg(i2c->fsi, I2C_FSI_STAT, &stat);
 	if (rc)
 		return rc;
 
@@ -503,15 +497,14 @@  static int fsi_i2c_abort(struct fsi_i2c_port *port, u32 status)
 		return 0;
 
 	/* write stop command */
-	rc = fsi_i2c_write_reg(fsi, I2C_FSI_CMD, &cmd);
+	rc = fsi_i2c_write_reg(i2c->fsi, I2C_FSI_CMD, &cmd);
 	if (rc)
 		return rc;
 
 	/* wait until we see command complete in the master */
 	start = jiffies;
-
 	do {
-		rc = fsi_i2c_read_reg(fsi, I2C_FSI_STAT, &status);
+		rc = fsi_i2c_read_reg(i2c->fsi, I2C_FSI_STAT, &status);
 		if (rc)
 			return rc;
 
@@ -527,8 +520,8 @@  static int fsi_i2c_abort(struct fsi_i2c_port *port, u32 status)
 static int fsi_i2c_handle_status(struct fsi_i2c_port *port,
 				 struct i2c_msg *msg, u32 status)
 {
-	int rc;
 	u8 fifo_count;
+	int rc;
 
 	if (status & I2C_STAT_ERR) {
 		rc = fsi_i2c_abort(port, status);
@@ -576,9 +569,9 @@  static int fsi_i2c_handle_status(struct fsi_i2c_port *port,
 static int fsi_i2c_wait(struct fsi_i2c_port *port, struct i2c_msg *msg,
 			unsigned long timeout)
 {
-	u32 status = 0;
-	int rc;
 	unsigned long start = jiffies;
+	u32 status;
+	int rc;
 
 	do {
 		rc = fsi_i2c_read_reg(port->master->fsi, I2C_FSI_STAT,
@@ -608,13 +601,13 @@  static int fsi_i2c_wait(struct fsi_i2c_port *port, struct i2c_msg *msg,
 static int fsi_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
 			int num)
 {
-	int i, rc;
-	unsigned long start_time;
 	struct fsi_i2c_port *port = adap->algo_data;
-	struct fsi_i2c_master *master = port->master;
+	unsigned long start_time;
 	struct i2c_msg *msg;
+	int rc;
+	int i;
 
-	mutex_lock(&master->lock);
+	mutex_lock(&port->master->lock);
 
 	rc = fsi_i2c_set_port(port);
 	if (rc)
@@ -635,7 +628,7 @@  static int fsi_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
 	}
 
 unlock:
-	mutex_unlock(&master->lock);
+	mutex_unlock(&port->master->lock);
 	return rc ? : num;
 }
 
@@ -681,8 +674,10 @@  static int fsi_i2c_probe(struct device *dev)
 	struct fsi_i2c_master *i2c;
 	struct fsi_i2c_port *port;
 	struct device_node *np;
-	u32 port_no, ports, stat;
+	u32 port_no;
+	u32 ports;
 	u32 lbus;
+	u32 stat;
 	int rc;
 
 	i2c = devm_kzalloc(dev, sizeof(*i2c), GFP_KERNEL);
@@ -753,14 +748,14 @@  static int fsi_i2c_probe(struct device *dev)
 	}
 
 	dev_set_drvdata(dev, i2c);
-
 	return 0;
 }
 
 static int fsi_i2c_remove(struct device *dev)
 {
 	struct fsi_i2c_master *i2c = dev_get_drvdata(dev);
-	struct fsi_i2c_port *port, *tmp;
+	struct fsi_i2c_port *port;
+	struct fsi_i2c_port *tmp;
 
 	list_for_each_entry_safe(port, tmp, &i2c->ports, list) {
 		list_del(&port->list);