From 6e80133abeb09721ec4601de5b1e68be67135309 Mon Sep 17 00:00:00 2001 From: William Zhang Date: Thu, 9 Feb 2023 12:02:39 -0800 Subject: [PATCH] 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: William Zhang Link: https://lore.kernel.org/r/20230209200246.141520-9-william.zhang@broadcom.com Signed-off-by: Mark Brown --- drivers/spi/spi.c | 7 +++++++ include/linux/spi/spi.h | 5 +++-- 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 21a8c3a8eee4..f4eb447c565d 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -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() * diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 9b23a1d0dd0d..88cb2a1390ce 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -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