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mxc_i2c: call i2c_imx_stop on error in i2c_read/i2c_write 

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
This commit is contained in:
Troy Kisky 2012-07-19 08:18:07 +00:00 committed by Heiko Schocher
parent b230ddc267
commit c4330d283c
1 changed files with 7 additions and 3 deletions
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10
drivers/i2c/mxc_i2c.c
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@ -337,8 +337,10 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len)
writeb(temp, &i2c_regs->i2cr);
ret = tx_byte(i2c_regs, (chip << 1) | 1);
if (ret < 0)
if (ret < 0) {
i2c_imx_stop();
return ret;
}
/* setup bus to read data */
temp = readb(&i2c_regs->i2cr);
@ -352,8 +354,10 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len)
/* read data */
for (i = 0; i < len; i++) {
ret = i2c_imx_trx_complete();
if (ret)
if (ret) {
i2c_imx_stop();
return ret;
}
/*
* It must generate STOP before read I2DR to prevent
@ -395,7 +399,7 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len)
for (i = 0; i < len; i++) {
ret = tx_byte(i2c_regs, buf[i]);
if (ret < 0)
return ret;
break;
}
i2c_imx_stop();