From: Kuo-Jung Su <[email protected]> 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 <[email protected]> Cc: Heiko Schocher <[email protected]> --- Changes for v2: - Initial release drivers/i2c/fti2c010.c | 38 ++++++++++++++++++++++++++++++-------- 1 file changed, 30 insertions(+), 8 deletions(-) diff --git a/drivers/i2c/fti2c010.c b/drivers/i2c/fti2c010.c index eccc1da..351fa38 100644 --- a/drivers/i2c/fti2c010.c +++ b/drivers/i2c/fti2c010.c @@ -179,6 +179,34 @@ static int fti2c010_probe(struct i2c_adapter *adap, u8 dev) return ret; } +static void addr_to_i2c_data(u8 *buf, uint32_t val, int len) +{ + if (!buf || len <= 0) + return; + + /* MSB first */ + switch (len) { + case 1: + buf[0] = (u8)(val & 0xff); + break; + case 2: + buf[0] = (u8)((val >> 8) & 0xff); + buf[1] = (u8)(val & 0xff); + break; + case 3: + buf[0] = (u8)((val >> 16) & 0xff); + buf[1] = (u8)((val >> 8) & 0xff); + buf[2] = (u8)(val & 0xff); + break; + default: + buf[0] = (u8)((val >> 24) & 0xff); + buf[1] = (u8)((val >> 16) & 0xff); + buf[2] = (u8)((val >> 8) & 0xff); + buf[3] = (u8)(val & 0xff); + break; + } +} + static int fti2c010_read(struct i2c_adapter *adap, u8 dev, uint addr, int alen, uchar *buf, int len) { @@ -187,10 +215,7 @@ 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; + addr_to_i2c_data(paddr, addr, alen); /* * Phase A. Set register address @@ -252,10 +277,7 @@ 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; + addr_to_i2c_data(paddr, addr, alen); /* * Phase A. Set register address -- 1.7.9.5 _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
