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mxc_i2c.c: code i2c_probe as a 0 length i2c_write

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Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Troy Kisky 2012-07-19 08:18:08 +00:00 • committed by Heiko Schocher
parent c4330d283c
commit cfbb88d338
1 changed files with 8 additions and 17 deletions
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25
drivers/i2c/mxc_i2c.c
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@ -301,23 +301,6 @@ exit:
return ret; return ret;
} }
/*
* Try if a chip add given address responds (probe the chip)
*/
int i2c_probe(uchar chip)
{
struct mxc_i2c_regs *i2c_regs = (struct mxc_i2c_regs *)I2C_BASE;
int ret;
ret = i2c_imx_start();
if (ret)
return ret;
ret = tx_byte(i2c_regs, chip << 1);
i2c_imx_stop();
return ret;
}
/* /*
* Read data from I2C device * Read data from I2C device
*/ */
@ -406,3 +389,11 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len)
return ret; return ret;
} }
/*
* Test if a chip at a given address responds (probe the chip)
*/
int i2c_probe(uchar chip)
{
return i2c_write(chip, 0, 0, NULL, 0);
}