diff options
| author | Dmitry Osipenko <digetx@gmail.com> | 2020-09-30 00:19:05 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@kernel.org> | 2020-10-05 22:57:43 +0200 |
| commit | 4a8e0f87977ec3b83db13d3ac22c6fc5a9703fd9 (patch) | |
| tree | a6fbaf89f3665b65dcd34f7dd60bd4e096e25712 /drivers/i2c | |
| parent | i2c: tegra: Rename wait/poll functions (diff) | |
| download | linux-4a8e0f87977ec3b83db13d3ac22c6fc5a9703fd9.tar.xz linux-4a8e0f87977ec3b83db13d3ac22c6fc5a9703fd9.zip | |
i2c: tegra: Factor out error recovery from tegra_i2c_xfer_msg()
Factor out error recovery code from tegra_i2c_xfer_msg() in order to
make this function easier to read and follow.
Reviewed-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-tegra.c | 46 |
1 files changed, 30 insertions, 16 deletions
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index f8bee67370aa..95d257cbd800 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -1105,6 +1105,32 @@ static int tegra_i2c_issue_bus_clear(struct i2c_adapter *adap) return -EAGAIN; } +static int tegra_i2c_error_recover(struct tegra_i2c_dev *i2c_dev, + struct i2c_msg *msg) +{ + if (i2c_dev->msg_err == I2C_ERR_NONE) + return 0; + + tegra_i2c_init(i2c_dev); + + /* start recovery upon arbitration loss in single master mode */ + if (i2c_dev->msg_err == I2C_ERR_ARBITRATION_LOST) { + if (!i2c_dev->is_multimaster_mode) + return i2c_recover_bus(&i2c_dev->adapter); + + return -EAGAIN; + } + + if (i2c_dev->msg_err == I2C_ERR_NO_ACK) { + if (msg->flags & I2C_M_IGNORE_NAK) + return 0; + + return -EREMOTEIO; + } + + return -EIO; +} + static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, struct i2c_msg *msg, enum msg_end_type end_state) @@ -1288,24 +1314,12 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, i2c_dev->msg_err); i2c_dev->is_curr_dma_xfer = false; - if (i2c_dev->msg_err == I2C_ERR_NONE) - return 0; - tegra_i2c_init(i2c_dev); - /* start recovery upon arbitration loss in single master mode */ - if (i2c_dev->msg_err == I2C_ERR_ARBITRATION_LOST) { - if (!i2c_dev->is_multimaster_mode) - return i2c_recover_bus(&i2c_dev->adapter); - return -EAGAIN; - } - - if (i2c_dev->msg_err == I2C_ERR_NO_ACK) { - if (msg->flags & I2C_M_IGNORE_NAK) - return 0; - return -EREMOTEIO; - } + err = tegra_i2c_error_recover(i2c_dev, msg); + if (err) + return err; - return -EIO; + return 0; } static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], |