Merge branch 'i2c-fix' of git://aeryn.fluff.org.uk/bjdooks/linux
authorLinus Torvalds <torvalds@linux-foundation.org>
Thu, 3 Jul 2008 02:26:38 +0000 (19:26 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 3 Jul 2008 02:26:38 +0000 (19:26 -0700)
* 'i2c-fix' of git://aeryn.fluff.org.uk/bjdooks/linux:
  I2C: S3C2410: Add MODULE_ALIAS() for s3c2440 device.
  I2C: S3C2410: Fixup error codes returned rom a transfer.
  I2C: S3C2410: Check ACK on byte transmission

drivers/i2c/busses/i2c-s3c2410.c

index 1305ef1..9e8c875 100644 (file)
@@ -290,12 +290,12 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat)
                 * bus, or started a new i2c message
                 */
                
-               if (iicstat  & S3C2410_IICSTAT_LASTBIT &&
+               if (iicstat & S3C2410_IICSTAT_LASTBIT &&
                    !(i2c->msg->flags & I2C_M_IGNORE_NAK)) {
                        /* ack was not received... */
 
                        dev_dbg(i2c->dev, "ack was not received\n");
-                       s3c24xx_i2c_stop(i2c, -EREMOTEIO);
+                       s3c24xx_i2c_stop(i2c, -ENXIO);
                        goto out_ack;
                }
 
@@ -305,7 +305,7 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat)
                        i2c->state = STATE_WRITE;
 
                /* terminate the transfer if there is nothing to do
-                * (used by the i2c probe to find devices */
+                * as this is used by the i2c probe to find devices. */
 
                if (is_lastmsg(i2c) && i2c->msg->len == 0) {
                        s3c24xx_i2c_stop(i2c, 0);
@@ -323,7 +323,17 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat)
                 * end of the message, and if so, work out what to do
                 */
 
+               if (!(i2c->msg->flags & I2C_M_IGNORE_NAK)) {
+                       if (iicstat & S3C2410_IICSTAT_LASTBIT) {
+                               dev_dbg(i2c->dev, "WRITE: No Ack\n");
+
+                               s3c24xx_i2c_stop(i2c, -ECONNREFUSED);
+                               goto out_ack;
+                       }
+               }
+
        retry_write:
+
                if (!is_msgend(i2c)) {
                        byte = i2c->msg->buf[i2c->msg_ptr++];
                        writeb(byte, i2c->regs + S3C2410_IICDS);
@@ -377,17 +387,6 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat)
                 * going to do any more read/write
                 */
 
-               if (!(i2c->msg->flags & I2C_M_IGNORE_NAK) &&
-                   !(is_msglast(i2c) && is_lastmsg(i2c))) {
-
-                       if (iicstat & S3C2410_IICSTAT_LASTBIT) {
-                               dev_dbg(i2c->dev, "READ: No Ack\n");
-
-                               s3c24xx_i2c_stop(i2c, -ECONNREFUSED);
-                               goto out_ack;
-                       }
-               }
-
                byte = readb(i2c->regs + S3C2410_IICDS);
                i2c->msg->buf[i2c->msg_ptr++] = byte;
 
@@ -949,3 +948,4 @@ MODULE_DESCRIPTION("S3C24XX I2C Bus driver");
 MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:s3c2410-i2c");
+MODULE_ALIAS("platform:s3c2440-i2c");