On 3/6/20 11:14 AM, Patrick Delaunay wrote:
DDRCTRL_PWRCTL.SELFREF_EN needs to be reset before DQS training step, not to enter in self refresh mode during the execution of this phase. Depending on settings, it can be set after the DQS training.
Signed-off-by: Patrick Delaunay patrick.delaunay@st.com
drivers/ram/stm32mp1/stm32mp1_ddr.c | 5 ++++- drivers/ram/stm32mp1/stm32mp1_ddr_regs.h | 1 + 2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/ram/stm32mp1/stm32mp1_ddr.c b/drivers/ram/stm32mp1/stm32mp1_ddr.c index a87914f2d5..b9300dd6d1 100644 --- a/drivers/ram/stm32mp1/stm32mp1_ddr.c +++ b/drivers/ram/stm32mp1/stm32mp1_ddr.c @@ -639,7 +639,8 @@ void stm32mp1_refresh_disable(struct stm32mp1_ddrctl *ctl) start_sw_done(ctl); /* quasi-dynamic register update*/ setbits_le32(&ctl->rfshctl3, DDRCTRL_RFSHCTL3_DIS_AUTO_REFRESH);
- clrbits_le32(&ctl->pwrctl, DDRCTRL_PWRCTL_POWERDOWN_EN);
- clrbits_le32(&ctl->pwrctl, DDRCTRL_PWRCTL_POWERDOWN_EN |
DDRCTRL_PWRCTL_SELFREF_EN);} @@ -652,6 +653,8 @@ void stm32mp1_refresh_restore(struct stm32mp1_ddrctl *ctl, clrbits_le32(&ctl->rfshctl3, DDRCTRL_RFSHCTL3_DIS_AUTO_REFRESH); if (pwrctl & DDRCTRL_PWRCTL_POWERDOWN_EN) setbits_le32(&ctl->pwrctl, DDRCTRL_PWRCTL_POWERDOWN_EN);
- if ((pwrctl & DDRCTRL_PWRCTL_SELFREF_EN))
setbits_le32(&ctl->pwrctl, DDRCTRL_PWRCTL_SELFREF_EN);} diff --git a/drivers/ram/stm32mp1/stm32mp1_ddr_regs.h b/drivers/ram/stm32mp1/stm32mp1_ddr_regs.h index 9d33186b3a..afd93c518e 100644 --- a/drivers/ram/stm32mp1/stm32mp1_ddr_regs.h +++ b/drivers/ram/stm32mp1/stm32mp1_ddr_regs.h @@ -260,6 +260,7 @@ struct stm32mp1_ddrphy {
#define DDRCTRL_MRSTAT_MR_WR_BUSY BIT(0)
+#define DDRCTRL_PWRCTL_SELFREF_EN BIT(0) #define DDRCTRL_PWRCTL_POWERDOWN_EN BIT(1) #define DDRCTRL_PWRCTL_SELFREF_SW BIT(5)
Acked-by: Patrice Chotard patrice.chotard@st.com
Thanks
Patrice
Acked-by: Patrice Chotard patrice.chotard@st.com
Thanks
Patrice