static int
i2c_put_byte(struct nouveau_i2c_port *port, u8 byte)
{
int i, ret;
for (i = 7; i >= 0; i--) {
ret = i2c_bitw(port, !!(byte & (1 << i)));
if (ret < 0)
return ret;
}
ret = i2c_bitr(port);
if (ret == 1) /* nack */
ret = -EIO;
return ret;
}
static int
nvkm_i2c_put_byte(struct nvkm_i2c_bus *bus, u8 byte)
{
int i, ret;
for (i = 7; i >= 0; i--) {
ret = i2c_bitw(bus, !!(byte & (1 << i)));
if (ret < 0)
return ret;
}
ret = i2c_bitr(bus);
if (ret == 1) /* nack */
ret = -EIO;
return ret;
}
static int
i2c_get_byte(struct nouveau_i2c_port *port, u8 *byte, bool last)
{
int i, bit;
*byte = 0;
for (i = 7; i >= 0; i--) {
bit = i2c_bitr(port);
if (bit < 0)
return bit;
*byte |= bit << i;
}
return i2c_bitw(port, last ? 1 : 0);
}
static int
nvkm_i2c_get_byte(struct nvkm_i2c_bus *bus, u8 *byte, bool last)
{
int i, bit;
*byte = 0;
for (i = 7; i >= 0; i--) {
bit = i2c_bitr(bus);
if (bit < 0)
return bit;
*byte |= bit << i;
}
return i2c_bitw(bus, last ? 1 : 0);
}
