Rasmus Villemoes 69b921acae spi: spi-fsl-spi: support use of the SPISEL_BOOT signal on MPC8309 ... The MPC8309 has a dedicated signal, SPISEL_BOOT, usually used as chip select for the flash device from which the bootloader is loaded. It is not an ordinary gpio, but is simply controlled via the SPI_CS register in the system configuration. To allow accessing such a spi slave, we need to teach fsl_spi_cs_control() how to control the SPISEL_BOOT signal. To distinguish the gpio-controlled slaves, continue to have those use chip_select values of 0..ngpios-1, and use chip_select == ngpios for the boot flash. I'm not too happy with all the ifdeffery, but it seems to be necessary for guarding the sysdev/fsl_soc.h and use of get_immrbase() (spi-fsl-lib.c already contains similar ifdeffery). Googling suggests that the MPC8306 is similar, with the SPI_CS register at the same offset. Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk> Signed-off-by: Mark Brown <broonie@kernel.org>		2019-03-18 14:47:24 +00:00
..
bindings	spi: spi-fsl-spi: support use of the SPISEL_BOOT signal on MPC8309	2019-03-18 14:47:24 +00:00
booting-without-of.txt
changesets.txt
dynamic-resolution-notes.txt
of_unittest.txt
overlay-notes.txt
usage-model.txt
writing-schema.md	dt-bindings: Add a writing DT schemas how-to and annotated example	2018-12-13 09:41:49 -06:00