diff options
| author | Shengzhou Liu <Shengzhou.Liu@nxp.com> | 2016-05-10 16:03:47 +0800 |
|---|---|---|
| committer | York Sun <york.sun@nxp.com> | 2016-05-18 08:51:47 -0700 |
| commit | 019a147b658631921a5d9d429a9097b33e142d78 (patch) | |
| tree | 07f42d9e80eef78c563309483506135d4723235c /drivers/ddr/fsl/fsl_ddr_gen4.c | |
| parent | 397b0d9e2971e6956399b7efd7737c962dd63c81 (diff) | |
driver/ddr/fsl: Add workaround for erratum A-010165
During DDR-2133 operation, the transmit data eye margins determined
during the memory controller initialization may be sub-optimal, set
DEBUG_29[12] and DEBUG_29[13:16] = 4'b0100 before MEM_EN is set.
Signed-off-by: Shengzhou Liu <Shengzhou.Liu@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
Diffstat (limited to 'drivers/ddr/fsl/fsl_ddr_gen4.c')
| -rw-r--r-- | drivers/ddr/fsl/fsl_ddr_gen4.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/ddr/fsl/fsl_ddr_gen4.c b/drivers/ddr/fsl/fsl_ddr_gen4.c index 1dc0631440..5039f5de0a 100644 --- a/drivers/ddr/fsl/fsl_ddr_gen4.c +++ b/drivers/ddr/fsl/fsl_ddr_gen4.c @@ -56,7 +56,8 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, u32 vref_seq2[3] = {0xc0, 0xf0, 0x70}; /* for range 2 */ u32 *vref_seq = vref_seq1; #endif -#ifdef CONFIG_SYS_FSL_ERRATUM_A009942 +#if defined(CONFIG_SYS_FSL_ERRATUM_A009942) | \ + defined(CONFIG_SYS_FSL_ERRATUM_A010165) ulong ddr_freq; u32 tmp; #endif @@ -271,6 +272,13 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, ddr_out32(&ddr->debug[28], tmp | 0x0060007b); #endif +#ifdef CONFIG_SYS_FSL_ERRATUM_A010165 + ddr_freq = get_ddr_freq(ctrl_num) / 1000000; + if ((ddr_freq > 1900) && (ddr_freq < 2300)) { + tmp = ddr_in32(&ddr->debug[28]); + ddr_out32(&ddr->debug[28], tmp | 0x000a0000); + } +#endif /* * For RDIMMs, JEDEC spec requires clocks to be stable before reset is * deasserted. Clocks start when any chip select is enabled and clock |