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| author | Troy Kisky <troy.kisky@boundarydevices.com> | 2012-07-19 08:18:08 +0000 |
|---|---|---|
| committer | Heiko Schocher <hs@denx.de> | 2012-07-31 07:43:51 +0200 |
| commit | cfbb88d338f8a4ff5a0b165521ffc030efe72f31 (patch) | |
| tree | e47b249c9776098cffbe245d062ad419685816cb | |
| parent | c4330d283cefbd3574366e82910da3e918324b86 (diff) | |
| download | u-boot-imx-cfbb88d338f8a4ff5a0b165521ffc030efe72f31.zip u-boot-imx-cfbb88d338f8a4ff5a0b165521ffc030efe72f31.tar.gz u-boot-imx-cfbb88d338f8a4ff5a0b165521ffc030efe72f31.tar.bz2 | |
mxc_i2c.c: code i2c_probe as a 0 length i2c_write
Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Stefano Babic <sbabic@denx.de>
| -rw-r--r-- | drivers/i2c/mxc_i2c.c | 25 |
1 files changed, 8 insertions, 17 deletions
diff --git a/drivers/i2c/mxc_i2c.c b/drivers/i2c/mxc_i2c.c index 55a688a..626e13e 100644 --- a/drivers/i2c/mxc_i2c.c +++ b/drivers/i2c/mxc_i2c.c @@ -302,23 +302,6 @@ exit: } /* - * 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 */ int i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len) @@ -406,3 +389,11 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len) 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); +} |