Hello Martyn,
Am 26.10.2017 um 16:47 schrieb Martyn Welch:
From: Nandor Han <[email protected]>
Tweak the i2c transfer to work for devices that want to read data
without addressing a register.
Signed-off-by: Nandor Han <[email protected]>
Signed-off-by: Martyn Welch <[email protected]>
Cc: Heiko Schocher <[email protected]>
Cc: Stefano Babic <[email protected]>
Signed-off-by: Martyn Welch <[email protected]>
---
drivers/i2c/mxc_i2c.c | 25 +++++++++++++++----------
1 file changed, 15 insertions(+), 10 deletions(-)
diff --git a/drivers/i2c/mxc_i2c.c b/drivers/i2c/mxc_i2c.c
index abf1da2..01f268b 100644
--- a/drivers/i2c/mxc_i2c.c
+++ b/drivers/i2c/mxc_i2c.c
@@ -317,16 +317,19 @@ static int i2c_init_transfer_(struct mxc_i2c_bus
*i2c_bus, u8 chip,
temp |= I2CR_MTX | I2CR_TX_NO_AK;
writeb(temp, base + (I2CR << reg_shift));
- /* write slave address */
- ret = tx_byte(i2c_bus, chip << 1);
- if (ret < 0)
- return ret;
-
- while (alen--) {
- ret = tx_byte(i2c_bus, (addr >> (alen * 8)) & 0xff);
+ if (alen != -1) {
I prefer here a "if (alen >= 0) {"
Thanks!
bye,
Heiko
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