i2c-parport: Various cleanups

* Fix white space.
* Rename labels to something meaningful.
* Prefix defines with PORT_ to avoid collision with macros from
  <linux/parport.h>.
* Add const markers where possible.

Signed-off-by: Jean Delvare <khali@linux-fr.org>

3 files changed, 55 insertions, 59 deletions

diff --git a/drivers/i2c/busses/i2c-parport-light.c b/drivers/i2c/busses/i2c-parport-light.c
index fc5fbd1012c9..4b95f7a63a3b 100644
--- a/drivers/i2c/busses/i2c-parport-light.c
+++ b/drivers/i2c/busses/i2c-parport-light.c
@@ -2,13 +2,13 @@
  * i2c-parport-light.c I2C bus over parallel port                           *
  * ------------------------------------------------------------------------ *
    Copyright (C) 2003-2010 Jean Delvare <khali@linux-fr.org>
-   
+
    Based on older i2c-velleman.c driver
    Copyright (C) 1995-2000 Simon G. Vogl
    With some changes from:
    Frodo Looijaard <frodol@dds.nl>
    Kyösti Mälkki <kmalkki@cc.hut.fi>
-   
+
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
@@ -114,7 +114,7 @@ static struct i2c_algo_bit_data parport_algo_data = {
         .getscl         = parport_getscl,
         .udelay         = 50,
         .timeout        = HZ,
-}; 
+};
 
 /* ----- Driver registration ---------------------------------------------- */
 
@@ -132,7 +132,7 @@ static struct i2c_smbus_alert_setup alert_data = {
 static struct i2c_client *ara;
 static struct lineop parport_ctrl_irq = {
         .val            = (1 << 4),
-        .port           = CTRL,
+        .port           = PORT_CTRL,
 };
 
 static int __devinit i2c_parport_probe(struct platform_device *pdev)
@@ -245,7 +245,7 @@ static int __init i2c_parport_init(void)
         if (irq != 0)
                 pr_info(DRVNAME ": using irq %d\n", irq);
 
-        if (!adapter_parm[type].getscl.val)
+        if (!adapter_parm[type].getscl.val)
                 parport_algo_data.getscl = NULL;
 
         /* Sets global pdev as a side effect */
diff --git a/drivers/i2c/busses/i2c-parport.c b/drivers/i2c/busses/i2c-parport.c
index 2dbba163b102..24565687ac9b 100644
--- a/drivers/i2c/busses/i2c-parport.c
+++ b/drivers/i2c/busses/i2c-parport.c
@@ -2,13 +2,13 @@
  * i2c-parport.c I2C bus over parallel port                                 *
  * ------------------------------------------------------------------------ *
    Copyright (C) 2003-2011 Jean Delvare <khali@linux-fr.org>
-   
+
    Based on older i2c-philips-par.c driver
    Copyright (C) 1995-2000 Simon G. Vogl
    With some changes from:
    Frodo Looijaard <frodol@dds.nl>
    Kyösti Mälkki <kmalkki@cc.hut.fi>
-   
+
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
@@ -78,13 +78,13 @@ static unsigned char port_read_control(struct parport *p)
         return parport_read_control(p);
 }
 
-static void (*port_write[])(struct parport *, unsigned char) = {
+static void (* const port_write[])(struct parport *, unsigned char) = {
         port_write_data,
         NULL,
         port_write_control,
 };
 
-static unsigned char (*port_read[])(struct parport *) = {
+static unsigned char (* const port_read[])(struct parport *) = {
         port_read_data,
         port_read_status,
         port_read_control,
@@ -147,7 +147,7 @@ static const struct i2c_algo_bit_data parport_algo_data = {
         .getscl         = parport_getscl,
         .udelay         = 10, /* ~50 kbps */
         .timeout        = HZ,
-}; 
+};
 
 /* ----- I2c and parallel port call-back functions and structures --------- */
 
@@ -164,10 +164,10 @@ void i2c_parport_irq(void *data)
                         "SMBus alert received but no ARA client!\n");
 }
 
-static void i2c_parport_attach (struct parport *port)
+static void i2c_parport_attach(struct parport *port)
 {
         struct i2c_par *adapter;
-        
+
         adapter = kzalloc(sizeof(struct i2c_par), GFP_KERNEL);
         if (adapter == NULL) {
                 printk(KERN_ERR "i2c-parport: Failed to kzalloc\n");
@@ -180,7 +180,7 @@ static void i2c_parport_attach (struct parport *port)
                 NULL, NULL, i2c_parport_irq, PARPORT_FLAG_EXCL, adapter);
         if (!adapter->pdev) {
                 printk(KERN_ERR "i2c-parport: Unable to register with parport\n");
-                goto ERROR0;
+                goto err_free;
         }
 
         /* Fill the rest of the structure */
@@ -200,7 +200,7 @@ static void i2c_parport_attach (struct parport *port)
 
         if (parport_claim_or_block(adapter->pdev) < 0) {
                 printk(KERN_ERR "i2c-parport: Could not claim parallel port\n");
-                goto ERROR1;
+                goto err_unregister;
         }
 
         /* Reset hardware to a sane state (SCL and SDA high) */
@@ -215,7 +215,7 @@ static void i2c_parport_attach (struct parport *port)
 
         if (i2c_bit_add_bus(&adapter->adapter) < 0) {
                 printk(KERN_ERR "i2c-parport: Unable to register with I2C\n");
-                goto ERROR1;
+                goto err_unregister;
         }
 
         /* Setup SMBus alert if supported */
@@ -234,16 +234,16 @@ static void i2c_parport_attach (struct parport *port)
         mutex_lock(&adapter_list_lock);
         list_add_tail(&adapter->node, &adapter_list);
         mutex_unlock(&adapter_list_lock);
-        return;
+        return;
 
-ERROR1:
+ err_unregister:
         parport_release(adapter->pdev);
         parport_unregister_device(adapter->pdev);
-ERROR0:
+ err_free:
         kfree(adapter);
 }
 
-static void i2c_parport_detach (struct parport *port)
+static void i2c_parport_detach(struct parport *port)
 {
         struct i2c_par *adapter, *_n;
 
@@ -260,7 +260,7 @@ static void i2c_parport_detach (struct parport *port)
                         /* Un-init if needed (power off...) */
                         if (adapter_parm[type].init.val)
                                 line_set(port, 0, &adapter_parm[type].init);
-                                
+
                         parport_release(adapter->pdev);
                         parport_unregister_device(adapter->pdev);
                         list_del(&adapter->node);
diff --git a/drivers/i2c/busses/i2c-parport.h b/drivers/i2c/busses/i2c-parport.h
index a9f66816546c..3fe652302ea7 100644
--- a/drivers/i2c/busses/i2c-parport.h
+++ b/drivers/i2c/busses/i2c-parport.h
@@ -2,7 +2,7 @@
  * i2c-parport.h I2C bus over parallel port                                 *
  * ------------------------------------------------------------------------ *
    Copyright (C) 2003-2010 Jean Delvare <khali@linux-fr.org>
-   
+
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
@@ -18,13 +18,9 @@
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  * ------------------------------------------------------------------------ */
 
-#ifdef DATA
-#undef DATA
-#endif
-
-#define DATA    0
-#define STAT    1
-#define CTRL    2
+#define PORT_DATA       0
+#define PORT_STAT       1
+#define PORT_CTRL       2
 
 struct lineop {
         u8 val;
@@ -41,61 +37,61 @@ struct adapter_parm {
         unsigned int smbus_alert:1;
 };
 
-static struct adapter_parm adapter_parm[] = {
+static const struct adapter_parm adapter_parm[] = {
         /* type 0: Philips adapter */
         {
-                .setsda = { 0x80, DATA, 1 },
-                .setscl = { 0x08, CTRL, 0 },
-                .getsda = { 0x80, STAT, 0 },
-                .getscl = { 0x08, STAT, 0 },
+                .setsda = { 0x80, PORT_DATA, 1 },
+                .setscl = { 0x08, PORT_CTRL, 0 },
+                .getsda = { 0x80, PORT_STAT, 0 },
+                .getscl = { 0x08, PORT_STAT, 0 },
         },
         /* type 1: home brew teletext adapter */
         {
-                .setsda = { 0x02, DATA, 0 },
-                .setscl = { 0x01, DATA, 0 },
-                .getsda = { 0x80, STAT, 1 },
+                .setsda = { 0x02, PORT_DATA, 0 },
+                .setscl = { 0x01, PORT_DATA, 0 },
+                .getsda = { 0x80, PORT_STAT, 1 },
         },
         /* type 2: Velleman K8000 adapter */
         {
-                .setsda = { 0x02, CTRL, 1 },
-                .setscl = { 0x08, CTRL, 1 },
-                .getsda = { 0x10, STAT, 0 },
+                .setsda = { 0x02, PORT_CTRL, 1 },
+                .setscl = { 0x08, PORT_CTRL, 1 },
+                .getsda = { 0x10, PORT_STAT, 0 },
         },
         /* type 3: ELV adapter */
         {
-                .setsda = { 0x02, DATA, 1 },
-                .setscl = { 0x01, DATA, 1 },
-                .getsda = { 0x40, STAT, 1 },
-                .getscl = { 0x08, STAT, 1 },
+                .setsda = { 0x02, PORT_DATA, 1 },
+                .setscl = { 0x01, PORT_DATA, 1 },
+                .getsda = { 0x40, PORT_STAT, 1 },
+                .getscl = { 0x08, PORT_STAT, 1 },
         },
         /* type 4: ADM1032 evaluation board */
         {
-                .setsda = { 0x02, DATA, 1 },
-                .setscl = { 0x01, DATA, 1 },
-                .getsda = { 0x10, STAT, 1 },
-                .init   = { 0xf0, DATA, 0 },
+                .setsda = { 0x02, PORT_DATA, 1 },
+                .setscl = { 0x01, PORT_DATA, 1 },
+                .getsda = { 0x10, PORT_STAT, 1 },
+                .init   = { 0xf0, PORT_DATA, 0 },
                 .smbus_alert = 1,
         },
         /* type 5: ADM1025, ADM1030 and ADM1031 evaluation boards */
         {
-                .setsda = { 0x02, DATA, 1 },
-                .setscl = { 0x01, DATA, 1 },
-                .getsda = { 0x10, STAT, 1 },
+                .setsda = { 0x02, PORT_DATA, 1 },
+                .setscl = { 0x01, PORT_DATA, 1 },
+                .getsda = { 0x10, PORT_STAT, 1 },
         },
         /* type 6: Barco LPT->DVI (K5800236) adapter */
         {
-                .setsda = { 0x02, DATA, 1 },
-                .setscl = { 0x01, DATA, 1 },
-                .getsda = { 0x20, STAT, 0 },
-                .getscl = { 0x40, STAT, 0 },
-                .init   = { 0xfc, DATA, 0 },
+                .setsda = { 0x02, PORT_DATA, 1 },
+                .setscl = { 0x01, PORT_DATA, 1 },
+                .getsda = { 0x20, PORT_STAT, 0 },
+                .getscl = { 0x40, PORT_STAT, 0 },
+                .init   = { 0xfc, PORT_DATA, 0 },
         },
         /* type 7: One For All JP1 parallel port adapter */
         {
-                .setsda = { 0x01, DATA, 0 },
-                .setscl = { 0x02, DATA, 0 },
-                .getsda = { 0x80, STAT, 1 },
-                .init   = { 0x04, DATA, 1 },
+                .setsda = { 0x01, PORT_DATA, 0 },
+                .setscl = { 0x02, PORT_DATA, 0 },
+                .getsda = { 0x80, PORT_STAT, 1 },
+                .init   = { 0x04, PORT_DATA, 1 },
         },
 };