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| author | Fabio Estevam <fabio.estevam@nxp.com> | 2016-08-29 20:37:15 -0300 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2016-09-06 18:22:48 +0200 |
| commit | edf0093732225c2fd0791c3864e9a3eef1f92f19 (patch) | |
| tree | 1a5bce06d282527778b608f35c39aa68065bd98e /board/wandboard/spl.c | |
| parent | 946db0cbd01090b35eb1439fa7c4ca7e015fc18b (diff) | |
| download | u-boot-imx-edf0093732225c2fd0791c3864e9a3eef1f92f19.zip u-boot-imx-edf0093732225c2fd0791c3864e9a3eef1f92f19.tar.gz u-boot-imx-edf0093732225c2fd0791c3864e9a3eef1f92f19.tar.bz2 | |
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>
Diffstat (limited to 'board/wandboard/spl.c')
| -rw-r--r-- | board/wandboard/spl.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/board/wandboard/spl.c b/board/wandboard/spl.c index 77afae7..085095c 100644 --- a/board/wandboard/spl.c +++ b/board/wandboard/spl.c @@ -187,6 +187,8 @@ static struct mx6_ddr_sysinfo mem_q = { .mif3_mode = 3, .rst_to_cke = 0x23, .sde_to_rst = 0x10, + .refsel = 1, /* Refresh cycles at 32KHz */ + .refr = 7, /* 8 refresh commands per refresh cycle */ }; static struct mx6_mmdc_calibration mx6dl_1g_mmdc_calib = { @@ -228,6 +230,8 @@ static struct mx6_ddr_sysinfo mem_dl = { .mif3_mode = 3, .rst_to_cke = 0x23, .sde_to_rst = 0x10, + .refsel = 1, /* Refresh cycles at 32KHz */ + .refr = 7, /* 8 refresh commands per refresh cycle */ }; /* DDR 32bit 512MB */ @@ -245,6 +249,8 @@ static struct mx6_ddr_sysinfo mem_s = { .mif3_mode = 3, .rst_to_cke = 0x23, .sde_to_rst = 0x10, + .refsel = 1, /* Refresh cycles at 32KHz */ + .refr = 7, /* 8 refresh commands per refresh cycle */ }; static void ccgr_init(void) |