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Fabio Estevam edf0093732 mx6: ddr: Allow changing REFSEL and REFR fields 
Currently MX6 SPL DDR initialization hardcodes the REF_SEL and
REFR fields of the MDREF register as 1 and 7, respectively for
DDR3 and 0 and 3 for LPDDR2.

Looking at the MDREF initialization done via DCD we see that
boards do need to initialize these fields differently:

$ git grep 0x021b0020 board/
board/bachmann/ot1200/mx6q_4x_mt41j128.cfg:DATA 4 0x021b0020 0x00005800
board/ccv/xpress/imximage.cfg:DATA 4 0x021b0020 0x00000800 /* MMDC0_MDREF */
board/freescale/mx6qarm2/imximage.cfg:DATA 4 0x021b0020 0x7800
board/freescale/mx6qarm2/imximage.cfg:DATA 4 0x021b0020 0x00005800
board/freescale/mx6qarm2/imximage_mx6dl.cfg:DATA 4 0x021b0020 0x00005800
board/freescale/mx6qarm2/imximage_mx6dl.cfg:DATA 4 0x021b0020 0x00005800
board/freescale/mx6qsabreauto/imximage.cfg:DATA 4 0x021b0020 0x00005800
board/freescale/mx6qsabreauto/mx6dl.cfg:DATA 4 0x021b0020 0x00005800
board/freescale/mx6qsabreauto/mx6qp.cfg:DATA 4 0x021b0020 0x00005800
board/freescale/mx6sabresd/mx6dlsabresd.cfg:DATA 4      0x021b0020 0x00005800
board/freescale/mx6sabresd/mx6q_4x_mt41j128.cfg:DATA 4 0x021b0020 0x00005800
board/freescale/mx6slevk/imximage.cfg:DATA 4 0x021b0020 0x00001800
board/freescale/mx6sxsabreauto/imximage.cfg:DATA 4 0x021b0020 0x00000800
board/freescale/mx6sxsabresd/imximage.cfg:DATA 4 0x021b0020 0x00000800
board/warp/imximage.cfg:DATA 4 0x021b0020 0x00001800

So introduce a mechanism for users to be able to configure
REFSEL and REFR fields as needed.

Keep all the mx6 SPL users in their current REF_SEL and REFR values,
so no functional changes for the existing users.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Eric Nelson <eric@nelint.com>
2016-09-06 18:22:48 +02:00
..
arm11 ARM: Move SYS_CACHELINE_SIZE over to Kconfig 2016-08-26 17:04:46 -04:00
arm720t ARM: ARM720t: remove empty asm/arch/hardware.h 2015-04-23 08:52:27 -04:00
arm920t arm: Allow skipping of low-level init with I-cache on 2016-06-12 23:49:38 +02:00
arm926ejs ARM: Move SYS_CACHELINE_SIZE over to Kconfig 2016-08-26 17:04:46 -04:00
arm946es arm: Allow skipping of low-level init with I-cache on 2016-06-12 23:49:38 +02:00
arm1136 common: Pass the boot device into spl_boot_mode() 2016-06-26 20:17:22 +02:00
arm1176 ARM: start.S: fix typo 2016-02-29 14:49:35 -05:00
armv7 mx6: ddr: Allow changing REFSEL and REFR fields 2016-09-06 18:22:48 +02:00
armv7m stm32: Add SDRAM support for stm32f746 discovery board 2016-07-14 18:22:43 -04:00
armv8 kconfig: use bool instead of boolean for type definition attributes 2016-08-12 09:23:49 -04:00
pxa ARM: Move SYS_CACHELINE_SIZE over to Kconfig 2016-08-26 17:04:46 -04:00
sa1100 arm: Allow skipping of low-level init with I-cache on 2016-06-12 23:49:38 +02:00
Makefile Various Makefiles: Add SPDX-License-Identifier tags 2015-11-10 09:19:52 -05:00
u-boot-spl.lds spl: arm: Make sure to include all of the u_boot_list entries 2016-03-16 15:27:55 -04:00
u-boot.lds ARM: Add secure section for initialized data 2016-07-15 15:54:58 +02:00