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i2c: fti2c010: serial out r/w address in MSB order

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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>
This commit is contained in:
Kuo-Jung Su 2013-12-02 16:02:58 +08:00 committed by Heiko Schocher
parent 49f4c762e4
commit c727618d2c
1 changed files with 18 additions and 8 deletions
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26
drivers/i2c/fti2c010.c
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@ -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