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spi: add devm_spi_optimize_message() helper

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This adds a new helper function devm_spi_optimize_message() that
automatically registers spi_unoptimize_message() to be called
when the device is removed.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20240621-devm_spi_optimize_message-v1-2-3f9dcba6e95e@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
David Lechner 2024-06-21 15:51:31 -05:00 committed by Mark Brown
parent 9b894d65e9
commit d4a0055fdc
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GPG Key ID: 24D68B725D5487D0
3 changed files with 30 additions and 0 deletions
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1
Documentation/driver-api/driver-model/devres.rst
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@ -464,6 +464,7 @@ SLAVE DMA ENGINE
SPI SPI
devm_spi_alloc_master() devm_spi_alloc_master()
devm_spi_alloc_slave() devm_spi_alloc_slave()
devm_spi_optimize_message()
devm_spi_register_controller() devm_spi_register_controller()
devm_spi_register_host() devm_spi_register_host()
devm_spi_register_target() devm_spi_register_target()

27
drivers/spi/spi.c
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@ -4378,6 +4378,33 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message)
return ctlr->transfer(spi, message); return ctlr->transfer(spi, message);
} }
static void devm_spi_unoptimize_message(void *msg)
{
spi_unoptimize_message(msg);
}
/**
* devm_spi_optimize_message - managed version of spi_optimize_message()
* @dev: the device that manages @msg (usually @spi->dev)
* @spi: the device that will be used for the message
* @msg: the message to optimize
* Return: zero on success, else a negative error code
*
* spi_unoptimize_message() will automatically be called when the device is
* removed.
*/
int devm_spi_optimize_message(struct device *dev, struct spi_device *spi,
struct spi_message *msg)
{
int ret;
ret = spi_optimize_message(spi, msg);
if (ret)
return ret;
return devm_add_action_or_reset(dev, devm_spi_unoptimize_message, msg);
}
/** /**
* spi_async - asynchronous SPI transfer * spi_async - asynchronous SPI transfer
* @spi: device with which data will be exchanged * @spi: device with which data will be exchanged

2
include/linux/spi/spi.h
View File

@ -1268,6 +1268,8 @@ static inline void spi_message_free(struct spi_message *m)
extern int spi_optimize_message(struct spi_device *spi, struct spi_message *msg); extern int spi_optimize_message(struct spi_device *spi, struct spi_message *msg);
extern void spi_unoptimize_message(struct spi_message *msg); extern void spi_unoptimize_message(struct spi_message *msg);
extern int devm_spi_optimize_message(struct device *dev, struct spi_device *spi,
struct spi_message *msg);
extern int spi_setup(struct spi_device *spi); extern int spi_setup(struct spi_device *spi);
extern int spi_async(struct spi_device *spi, struct spi_message *message); extern int spi_async(struct spi_device *spi, struct spi_message *message);