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ti: common: board_detect: Set alen to expected value before i2c read

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In non DM I2C read operations the address length passed in during a read
operation will be used automatically. However, in DM I2C the address length
is set to a default value of one which causes problems when trying to
perform a read with a differing alen. Therefore, before the first read in a
series of read operations set the alen to the correct value.

Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Cooper Jr., Franklin 2017-04-20 10:25:45 -05:00 committed by Heiko Schocher
parent c6b80b1392
commit e25ae3224f
1 changed files with 22 additions and 2 deletions
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24
board/ti/common/board_detect.c
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@ -83,7 +83,17 @@ static int __maybe_unused ti_i2c_eeprom_init(int i2c_bus, int dev_addr)
static int __maybe_unused ti_i2c_eeprom_read(int dev_addr, int offset,
uchar *ep, int epsize)
{
return i2c_read(dev_addr, offset, 2, ep, epsize);
int bus_num, rc, alen;
bus_num = i2c_get_bus_num();
alen = 2;
rc = ti_i2c_set_alen(bus_num, dev_addr, alen);
if (rc)
return rc;
return i2c_read(dev_addr, offset, alen, ep, epsize);
}
/**
@ -125,6 +135,11 @@ static int __maybe_unused ti_i2c_eeprom_get(int bus_addr, int dev_addr,
* Read the header first then only read the other contents.
*/
byte = 2;
rc = ti_i2c_set_alen(bus_addr, dev_addr, byte);
if (rc)
return rc;
rc = i2c_read(dev_addr, 0x0, byte, (uint8_t *)&hdr_read, 4);
if (rc)
return rc;
@ -137,9 +152,14 @@ static int __maybe_unused ti_i2c_eeprom_get(int bus_addr, int dev_addr,
* 1 byte address (some legacy boards need this..)
*/
byte = 1;
if (rc)
if (rc) {
rc = ti_i2c_set_alen(bus_addr, dev_addr, byte);
if (rc)
return rc;
rc = i2c_read(dev_addr, 0x0, byte, (uint8_t *)&hdr_read,
4);
}
if (rc)
return rc;
}