From: Kuo-Jung Su dantesu@faraday-tech.com
For a eeprom with a 2-bytes address (e.g., Ateml AT24C1024B), the r/w address should be serial out in MSB order.
Signed-off-by: Kuo-Jung Su dantesu@faraday-tech.com Cc: Heiko Schocher hs@denx.de --- Changes for v3: - Coding style update
Changes for v2: - Initial release
drivers/i2c/fti2c010.c | 26 ++++++++++++++++++-------- 1 file changed, 18 insertions(+), 8 deletions(-)
diff --git a/drivers/i2c/fti2c010.c b/drivers/i2c/fti2c010.c index eccc1da..fb9fa35 100644 --- a/drivers/i2c/fti2c010.c +++ b/drivers/i2c/fti2c010.c @@ -179,6 +179,22 @@ static int fti2c010_probe(struct i2c_adapter *adap, u8 dev) return ret; }
+static void to_i2c_addr(u8 *buf, uint32_t addr, int alen) +{ + int i, shift; + + if (!buf || alen <= 0) + return; + + /* MSB first */ + i = 0; + shift = (alen - 1) * 8; + while (alen-- > 0) { + buf[i] = (u8)(addr >> shift); + shift -= 8; + } +} + static int fti2c010_read(struct i2c_adapter *adap, u8 dev, uint addr, int alen, uchar *buf, int len) { @@ -187,10 +203,7 @@ static int fti2c010_read(struct i2c_adapter *adap, int ret, pos; uchar paddr[4];
- paddr[0] = (addr >> 0) & 0xFF; - paddr[1] = (addr >> 8) & 0xFF; - paddr[2] = (addr >> 16) & 0xFF; - paddr[3] = (addr >> 24) & 0xFF; + to_i2c_addr(paddr, addr, alen);
/* * Phase A. Set register address @@ -252,10 +265,7 @@ static int fti2c010_write(struct i2c_adapter *adap, int ret, pos; uchar paddr[4];
- paddr[0] = (addr >> 0) & 0xFF; - paddr[1] = (addr >> 8) & 0xFF; - paddr[2] = (addr >> 16) & 0xFF; - paddr[3] = (addr >> 24) & 0xFF; + to_i2c_addr(paddr, addr, alen);
/* * Phase A. Set register address -- 1.7.9.5