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

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>

diff --git a/drivers/i2c/fti2c010.c b/drivers/i2c/fti2c010.c
index eccc1da..fb9fa35 100644 (file)
--- 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