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authorKuo-Jung Su <dantesu@faraday-tech.com>2013-12-02 16:02:58 +0800
committerHeiko Schocher <hs@denx.de>2013-12-05 12:25:01 +0100
commitc727618d2cee0b848e5349ec923a5ef0bc3f0447 (patch)
tree4d7e7795aaa1427a5ebc3de621d54b1c0f39d7f5 /drivers/i2c
parent49f4c762e4a14cb4b8088bcc0726d7b1ce80e014 (diff)
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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>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/fti2c010.c26
1 files 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