diff options
| author | Laxman Dewangan <ldewangan@nvidia.com> | 2012-03-27 18:54:35 +0530 |
|---|---|---|
| committer | Rohan Somvanshi <rsomvanshi@nvidia.com> | 2012-04-05 08:45:55 -0700 |
| commit | b5e2ad69b5f5cc13f5a96b09335896d6d5dbed78 (patch) | |
| tree | dabc8fa76dd479a73d0d6bf6e67cf7b76efce61f /drivers/i2c | |
| parent | 3dac5c7cf1838d72ecfb1d0fe5ebbf5ead3066c8 (diff) | |
i2c: tegra: Support for I2C_M_REV_DIR_ADDR protocol mangling
Add support for protocol mangling "I2C_M_REV_DIR_ADDR"
Change-Id: Icdef16885f1cf6ed1ce9c4003a94c2c2e917ced2
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/92572
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-tegra.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index bde4a6dd8e33..a4c1e0d82939 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -633,6 +633,10 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_bus *i2c_bus, tegra_i2c_flush_fifos(i2c_dev); + /* Toggle the direction flag if rev dir is selected */ + if (msg->flags & I2C_M_REV_DIR_ADDR) + msg->flags ^= I2C_M_RD; + i2c_dev->msg_buf = msg->buf; i2c_dev->msg_buf_remaining = msg->len; i2c_dev->msg_err = I2C_ERR_NONE; @@ -690,6 +694,10 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_bus *i2c_bus, if (i2c_dev->is_dvc) dvc_i2c_mask_irq(i2c_dev, DVC_CTRL_REG3_I2C_DONE_INTR_EN); + /* Restore the message flag */ + if (msg->flags & I2C_M_REV_DIR_ADDR) + msg->flags ^= I2C_M_RD; + if (WARN_ON(ret == 0)) { dev_err(i2c_dev->dev, "i2c transfer timed out, addr 0x%04x, data 0x%02x\n", @@ -783,7 +791,8 @@ static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], static u32 tegra_i2c_func(struct i2c_adapter *adap) { - return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | I2C_FUNC_10BIT_ADDR; + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | I2C_FUNC_10BIT_ADDR | + I2C_FUNC_PROTOCOL_MANGLING; } static const struct i2c_algorithm tegra_i2c_algo = { |