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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>
hifive-unleashed-5.1
Zhiwu Song 2013-08-13 17:11:30 +08:00 committed by Wolfram Sang
parent 4602bf1642
commit 5ebffa6b5e
1 changed files with 4 additions and 0 deletions
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4
drivers/i2c/busses/i2c-sirf.c
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@ -194,6 +194,10 @@ static void i2c_sirfsoc_set_address(struct sirfsoc_i2c *siic,
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++));
}