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| author | Sean Anderson <seanga2@gmail.com> | 2020-10-16 18:57:53 -0400 |
|---|---|---|
| committer | Jagan Teki <jagan@amarulasolutions.com> | 2020-12-18 16:16:37 +0530 |
| commit | fec7bf0460dbf5a6744e1f98298a9b664f856a34 (patch) | |
| tree | 63b07738b3ea02b39d75d78d123e453148ed44ac /drivers/ddr/imx/imx8m/ddr_init.c | |
| parent | 0d98f6de62dc02cbdbf0a40bdb02e465256e2150 (diff) | |
| download | u-boot-fec7bf0460dbf5a6744e1f98298a9b664f856a34.tar.gz u-boot-fec7bf0460dbf5a6744e1f98298a9b664f856a34.tar.xz u-boot-fec7bf0460dbf5a6744e1f98298a9b664f856a34.zip | |
spi: dw: Add mem_ops
The designware ssi device has "broken" chip select behaviour [1], and needs
specific manipulation to use the built-in chip select. The existing fix is
to use an external GPIO for chip select, but typically the K210 has SPI3
directly connected to a flash chip with dedicated pins. This makes it
impossible to use the spi_xfer function to use spi, since the CS is
de-asserted in between calls. This patch adds an implementation of
exec_op, which gives correct behaviour when reading/writing spi flash.
This patch also rearranges the headers to conform to U-Boot style.
[1] https://lkml.org/lkml/2015/12/23/132
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Tested-by Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
Diffstat (limited to 'drivers/ddr/imx/imx8m/ddr_init.c')
0 files changed, 0 insertions, 0 deletions