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Commit 9ad4107b authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'i2c-fix' of git://aeryn.fluff.org.uk/bjdooks/linux 

* '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
parents 0e77a07f d150a4bb

drivers/i2c/busses/i2c-s3c2410.c

+14 −14
Original line number Diff line number Diff line
@@ -295,7 +295,7 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat) 
			/* 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");