[PATCH resend 1/5] gpio/mpc83xx_spisel_boot.c: gpio driver for SPISEL_BOOT signal
trini at konsulko.com
Tue Mar 31 21:09:51 CEST 2020
On Tue, Feb 11, 2020 at 03:20:22PM +0000, Rasmus Villemoes wrote:
> From: "Klaus H. Sorensen" <khso at prevas.dk>
> Some SoCs in the mpc83xx family, e.g. mpc8309, have a dedicated spi
> chip select, SPISEL_BOOT, that is used by the boot code to boot from
> This chip select will typically be used to select a SPI boot
> flash. The SPISEL_BOOT signal is controlled by a single bit in the
> SPI_CS register.
> Implement a gpio driver for the spi chip select register. This allows a
> spi driver capable of using gpios as chip select, to bind a chip select
> to SPISEL_BOOT.
> It may be a little odd to do this as a GPIO driver, since the signal
> is neither GP or I, but it is quite convenient to present it to the
> spi driver that way. The alternative it to teach mpc8xxx_spi to handle
> the SPISEL_BOOT signal itself (that is how it's done in the linux
> kernel, see commit 69b921acae8a)
> Signed-off-by: Klaus H. Sorensen <khso at prevas.dk>
> Signed-off-by: Rasmus Villemoes <rasmus.villemoes at prevas.dk>
Applied to u-boot/master, thanks!
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