Commit b716c4ff authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Mark Brown

spi: introduce master->handle_err() callback

This callback would be useful to handle an error that occurs in the generic
implementation of transfer_one_message(). The good candidate for this is to
drain FIFO and / or to terminate DMA transfers when timeout happened.
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent c517d838
......@@ -851,6 +851,9 @@ out:
if (msg->status == -EINPROGRESS)
msg->status = ret;
if (msg->status)
master->handle_err(master, msg);
spi_finalize_current_message(master);
return ret;
......
......@@ -294,6 +294,8 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
* transfer_one_message are mutually exclusive; when both
* are set, the generic subsystem does not call your
* transfer_one callback.
* @handle_err: the subsystem calls the driver to handle and error that occurs
* in the generic implementation of transfer_one_message().
* @unprepare_message: undo any work done by prepare_message().
* @cs_gpios: Array of GPIOs to use as chip select lines; one per CS
* number. Any individual value may be -ENOENT for CS lines that
......@@ -448,6 +450,8 @@ struct spi_master {
void (*set_cs)(struct spi_device *spi, bool enable);
int (*transfer_one)(struct spi_master *master, struct spi_device *spi,
struct spi_transfer *transfer);
void (*handle_err)(struct spi_master *master,
struct spi_message *message);
/* gpio chip select */
int *cs_gpios;
......
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