On Fri, Nov 15, 2024 at 08:57:41PM +0100, Marco Felsch wrote:
> At the moment all drivers have to parse the cs-gpios on their own and
> have to implement the mapping. By this commit we add the support to
> handle this within the core and if there is a valid CS GPIO for a device
> we assign it accordingly.
>
...
> * likely need more hooks for more protocol options affecting how
> @@ -156,6 +158,9 @@ static inline void spi_set_ctldata(struct spi_device *spi, void *state)
> * the device whose settings are being modified.
> * @transfer: adds a message to the controller's transfer queue.
> * @cleanup: frees controller-specific state
> + * @cs_gpiods: Array of GPIO descriptors to use as chip select lines; one per CS
> + * number. Any individual value may be NULL for CS lines that
> + * are not GPIOs (driven by the SPI controller itself).
> * @list: link with the global spi_controller list
> *
> * Each SPI controller can communicate with one or more @spi_device
> @@ -233,6 +238,10 @@ struct spi_controller {
> /* called on release() to free memory provided by spi_controller */
> void (*cleanup)(struct spi_device *spi);
>
> + /* GPIO chip select */
> + struct gpio_desc **cs_gpiods;
> + bool use_gpio_descriptors;
You forgot to copy the documentation for this member.
Sascha
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