arm64: zynqmp: zcu106: fix SPL MMC booting

The U-Boot SPL generated with the current zcu106 defconfig cannot boot
from MMC:

  [...]
  U-Boot SPL 2018.01 (Feb 21 2018 - 17:47:14)
  EL Level:  EL3
  Trying to boot from MMC1
  sdhci_transfer_data: Error detected in status(0x408020)!
  spl_load_image_fat_os: error reading image u-boot.bin, err - -2
  spl_load_image_fat: error reading image u-boot.img, err - -6
  SPL: failed to boot from all boot devices
  ### ERROR ### Please RESET the board ###

Fix by lowering the rpll value. The new value for the RPLL_CTRL
register comes from the current psu_init_gpl.c from the HDF file at
https://github.com/xilinx/hdf-examples/tree/01ad8ea5fd1989abf4ea5a072d019a16cb2bc546/zcu106-zynqmp
(generated by Vivado v2017.4).

RPLL and sdio1_ref clocks before and after this change:

 - Old values: RPLL 1.36 GHz, sdio1_ref 272 MHz
 - New values: RPLL 1.16 GHz, sdio1_ref 233 MHz

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Cc: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/board/xilinx/zynqmp/zynqmp-zcu106-revA/psu_init_gpl.c b/board/xilinx/zynqmp/zynqmp-zcu106-revA/psu_init_gpl.c
index 4d18abe000ca0b3031ffd7e074a0c8822933d756..e6fa477e53e7320bb998b6d23068df6d179725dd 100644 (file)
--- a/board/xilinx/zynqmp/zynqmp-zcu106-revA/psu_init_gpl.c
+++ b/board/xilinx/zynqmp/zynqmp-zcu106-revA/psu_init_gpl.c
@@ -10,7 +10,7 @@
 static unsigned long psu_pll_init_data(void)
 {
        psu_mask_write(0xFF5E0034, 0xFE7FEDEFU, 0x7E4E2C62U);
-       psu_mask_write(0xFF5E0030, 0x00717F00U, 0x00013C00U);
+       psu_mask_write(0xFF5E0030, 0x00717F00U, 0x00014600U);
        psu_mask_write(0xFF5E0030, 0x00000008U, 0x00000008U);
        psu_mask_write(0xFF5E0030, 0x00000001U, 0x00000001U);
        psu_mask_write(0xFF5E0030, 0x00000001U, 0x00000000U);