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spi: use gpio_dt_spec in struct spi_cs_control

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Use the standard `struct gpio_dt_spec` type in the chip select control.
The anonymous struct and union allows previous instantiations to
continue working while letting functions operate on the new type.

Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
Co-authored-by: Jordan Yates <jordan.yates@data61.csiro.au>
Signed-off-by: Bartosz Bilas <bartosz.bilas@hotmail.com>
Co-authored-by: Bartosz Bilas <bartosz.bilas@hotmail.com>
This commit is contained in:
Jordan Yates 2021-08-01 15:26:32 +10:00 • committed by Christopher Friedt
commit 89d76e9bbe
1 changed files with 20 additions and 14 deletions
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34
include/drivers/spi.h
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@ -124,22 +124,28 @@ extern "C" {
* This can be used to control a CS line via a GPIO line, instead of
* using the controller inner CS logic.
*
* @param gpio_dev is a valid pointer to an actual GPIO device. A NULL pointer
* can be provided to full inhibit CS control if necessary.
* @param gpio_pin is a number representing the gpio PIN that will be used
* to act as a CS line
* @param delay is a delay in microseconds to wait before starting the
* transmission and before releasing the CS line
* @param gpio_dt_flags is the devicetree flags corresponding to how the CS
* line should be driven. GPIO_ACTIVE_LOW/GPIO_ACTIVE_HIGH should be
* equivalent to SPI_CS_ACTIVE_HIGH/SPI_CS_ACTIVE_LOW options in struct
* spi_config.
*/
struct spi_cs_control {
const struct device *gpio_dev;
uint32_t delay;
gpio_pin_t gpio_pin;
gpio_dt_flags_t gpio_dt_flags;
/**
* GPIO devicetree specification of CS GPIO.
* The device pointer can be set to NULL to fully inhibit CS control if
* necessary. The GPIO flags GPIO_ACTIVE_LOW/GPIO_ACTIVE_HIGH should be
* equivalent to SPI_CS_ACTIVE_HIGH/SPI_CS_ACTIVE_LOW options in struct
* spi_config.
*/
union {
struct gpio_dt_spec gpio;
struct {
const struct device *gpio_dev;
gpio_pin_t gpio_pin;
gpio_dt_flags_t gpio_dt_flags;
};
};
/**
* Delay in microseconds to wait before starting the
* transmission and before releasing the CS line.
*/
uint32_t delay;
};
#ifndef __cplusplus