i2c: sirf: support reverse direction of address
if users set I2C_M_REV_DIR_ADDR, revert the direction of address.
Signed-off-by: Zhiwu Song <Zhiwu.Song@csr.com>
Signed-off-by: Rongjun Ying <rongjun.ying@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
diff --git a/drivers/i2c/busses/i2c-sirf.c b/drivers/i2c/busses/i2c-sirf.c
index 3b5fd38..30ae378 100644
--- a/drivers/i2c/busses/i2c-sirf.c
+++ b/drivers/i2c/busses/i2c-sirf.c
@@ -194,6 +194,10 @@
if (msg->flags & I2C_M_RD)
addr |= 1;
+ /* Reverse direction bit */
+ if (msg->flags & I2C_M_REV_DIR_ADDR)
+ addr ^= 1;
+
writel(addr, siic->base + SIRFSOC_I2C_CMD(siic->cmd_ptr++));
}