zephyr/drivers/spi/Kconfig.bitbang

# Copyright (c) 2021, Marc Reilly, Creative Product Design
# SPDX-License-Identifier: Apache-2.0

config SPI_BITBANG
	bool "Bitbang SPI controller driver"
	default y
	depends on DT_HAS_ZEPHYR_SPI_BITBANG_ENABLED
	help
	  Enable the Bitbang SPI controller
drivers: spi: add spi-bitbang driver This adds an spi master mode driver via bitbanged gpio. Only syncronous transfers are implemented. Clock signal timing is accomplished via busy waits, the gpios are manipulated via the standard gpio interface; these two factors limit the frequency at which it can operate - but here a simple and generic implementation was chosen over performance. The driver supports the various clock polarity and phase configurations, and can also work with word sizes which are non multiples of 8bits, currently up to 16 bits. A sample program is also added demonstrating basic use of the driver with 9bit data words. Signed-off-by: Marc Reilly <marc@cpdesign.com.au> 2021-12-02 13:03:46 +08:00			`# Copyright (c) 2021, Marc Reilly, Creative Product Design`
			`# SPDX-License-Identifier: Apache-2.0`

			`config SPI_BITBANG`
			`bool "Bitbang SPI controller driver"`
drivers: spi: Update drivers to use devicetree Kconfig symbol Update spi drivers to use DT_HAS_<compat>_ENABLED Kconfig symbol to expose the driver and enable it by default based on devicetree. We remove 'depend on' Kconfig for symbols that would be implied by the devicetree node existing. Signed-off-by: Kumar Gala <galak@kernel.org> 2022-07-21 05:14:56 +08:00			`default y`
			`depends on DT_HAS_ZEPHYR_SPI_BITBANG_ENABLED`
drivers: spi: add spi-bitbang driver This adds an spi master mode driver via bitbanged gpio. Only syncronous transfers are implemented. Clock signal timing is accomplished via busy waits, the gpios are manipulated via the standard gpio interface; these two factors limit the frequency at which it can operate - but here a simple and generic implementation was chosen over performance. The driver supports the various clock polarity and phase configurations, and can also work with word sizes which are non multiples of 8bits, currently up to 16 bits. A sample program is also added demonstrating basic use of the driver with 9bit data words. Signed-off-by: Marc Reilly <marc@cpdesign.com.au> 2021-12-02 13:03:46 +08:00			`help`
			`Enable the Bitbang SPI controller`