Unverified Commit 6e80133a authored by William Zhang's avatar William Zhang Committed by Mark Brown
Browse files

spi: export spi_transfer_cs_change_delay_exec function 



For SPI controller that implements transfer_one_message, it needs to
insert the delay that required by cs change event between the transfers.
Add a wrapper for the local function _spi_transfer_cs_change_delay_exec
and export it for SPI controller driver to use.

Signed-off-by: default avatarWilliam Zhang <william.zhang@broadcom.com>
Link: https://lore.kernel.org/r/20230209200246.141520-9-william.zhang@broadcom.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 2ea9b08a

drivers/spi/spi.c

+7 −0
Original line number Diff line number Diff line
@@ -1483,6 +1483,13 @@ static void _spi_transfer_cs_change_delay(struct spi_message *msg, 
	}

}



void spi_transfer_cs_change_delay_exec(struct spi_message *msg,

						  struct spi_transfer *xfer)

{

	_spi_transfer_cs_change_delay(msg, xfer);

}

EXPORT_SYMBOL_GPL(spi_transfer_cs_change_delay_exec);



/*

 * spi_transfer_one_message - Default implementation of transfer_one_message()

 *

include/linux/spi/spi.h

+3 −2
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ struct spi_controller; 
struct spi_transfer;

struct spi_controller_mem_ops;

struct spi_controller_mem_caps;

struct spi_message;



/*

 * INTERFACES between SPI master-side drivers and SPI slave protocol handlers,
@@ -119,6 +120,8 @@ struct spi_delay { 


extern int spi_delay_to_ns(struct spi_delay *_delay, struct spi_transfer *xfer);

extern int spi_delay_exec(struct spi_delay *_delay, struct spi_transfer *xfer);

extern void spi_transfer_cs_change_delay_exec(struct spi_message *msg,

						  struct spi_transfer *xfer);



/**

 * struct spi_device - Controller side proxy for an SPI slave device
@@ -283,8 +286,6 @@ static inline void spi_set_csgpiod(struct spi_device *spi, u8 idx, struct gpio_d 
	spi->cs_gpiod = csgpiod;

}



struct spi_message;



/**

 * struct spi_driver - Host side "protocol" driver

 * @id_table: List of SPI devices supported by this driver