diff options
| author | Brad Griffis <bgriffis@ti.com> | 2019-04-29 09:59:28 +0530 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2019-05-05 08:48:50 -0400 |
| commit | 82195797a415211c7a674116e40e10750237790b (patch) | |
| tree | 368f9820859289d80d7c119086313b050b6e51fb /arch | |
| parent | 6c74e94a6529625845557aa5fc2041f7355ba02a (diff) | |
arm: mach-omap2: am33xx: ddr: programming of EXT_PHY_CTRL1 and EXT_PHY_CTRL1_SHADOW
Adjust DQS skew in case where invert_clkout=1 is used.
Match recommended values from EMIF Tools app note:
http://www.ti.com/lit/an/sprac70/sprac70.pdf
Signed-off-by: Brad Griffis <bgriffis@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-omap2/am33xx/ddr.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/arm/mach-omap2/am33xx/ddr.c b/arch/arm/mach-omap2/am33xx/ddr.c index be6f4d72cc..816d4e8e05 100644 --- a/arch/arm/mach-omap2/am33xx/ddr.c +++ b/arch/arm/mach-omap2/am33xx/ddr.c @@ -256,8 +256,16 @@ static void ext_phy_settings_hwlvl(const struct emif_regs *regs, int nr) * Enable hardware leveling on the EMIF. For details about these * magic values please see the EMIF registers section of the TRM. */ - writel(0x08020080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_1); - writel(0x08020080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_1_shdw); + if (regs->emif_ddr_phy_ctlr_1 & 0x00040000) { + /* PHY_INVERT_CLKOUT = 1 */ + writel(0x00040100, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_1); + writel(0x00040100, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_1_shdw); + } else { + /* PHY_INVERT_CLKOUT = 0 */ + writel(0x08020080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_1); + writel(0x08020080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_1_shdw); + } + writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_22); writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_22_shdw); writel(0x00600020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_23); |