u-boot/drivers/ddr/imx
Rasmus Villemoes c9473b2c37 imx8m: fix reading of DDR4 MR registers [again]
Commit 290ffe5788 (imx8m: fix reading of DDR4 MR registers) lifted a
private definition of lpddr4_mr_read() from imx8mm-cl-iot-gate board
code to drivers/ddr/imx/imx8m/ddrphy_utils.c, because that version
actually seems to work in practice.

However, commit 99c7cc58e1 (ddr: imx: Add i.MX9 DDR controller driver)
reintroduced the broken version in drivers/ddr/imx/imx8m/ddr_init.c,
copied most of the rest of ddrphy_utils.c to
drivers/ddr/imx/phy/ddrphy_utils.c, and stopped building
drivers/ddr/imx/imx8m/ddrphy_utils.c [and that file was then finally
completely removed with 7e9bd84883 (imx8m: ddrphy_utils: Remove unused
file)].

I assume this must have broken the imx8mm-cl-iot-gate board, at least
those that have not had their eeprom programmed with the proper
information. It certainly did break our out-of-tree board which always
reads back the ID register and uses that for a sanity check.

So apply the fix from 290ffe5788 once again.

Fixes: 99c7cc58e1 (ddr: imx: Add i.MX9 DDR controller driver)
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Fabio Estevam <festevam@denx.de>
2022-10-24 11:34:33 +02:00
..
imx8m imx8m: fix reading of DDR4 MR registers [again] 2022-10-24 11:34:33 +02:00
imx8ulp imx8ulp: ddr: Fix DDR frequency request issue 2022-02-05 13:38:39 +01:00
imx9 ddr: imx9: enable Performance monitor counter 2022-07-26 11:29:01 +02:00
phy ddr: imx8m: helper: load ddr firmware according to binman symbols 2022-07-26 11:29:02 +02:00
Kconfig ddr: imx: Add i.MX9 DDR controller driver 2022-07-26 11:29:01 +02:00