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ram: stm32mp1: increase vdd2_ddr: buck2 for 32bits LPDDR

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Need to increase the LPDDR2/LPDDR3 the voltage vdd2_ddr: buck2
form 1.2V to 1.25V for 32bits configuration.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
This commit is contained in:
Patrick Delaunay
2020-03-06 11:14:03 +01:00
parent 1a4f57c895
commit e9a20f8a19
4 changed files with 49 additions and 11 deletions
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30
drivers/ram/stm32mp1/stm32mp1_ddr.c
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@@ -668,14 +668,34 @@ void stm32mp1_ddr_init(struct ddr_info *priv,
{
u32 pir;
int ret = -EINVAL;
char bus_width;
switch (config->c_reg.mstr & DDRCTRL_MSTR_DATA_BUS_WIDTH_MASK) {
case DDRCTRL_MSTR_DATA_BUS_WIDTH_QUARTER:
bus_width = 8;
break;
case DDRCTRL_MSTR_DATA_BUS_WIDTH_HALF:
bus_width = 16;
break;
default:
bus_width = 32;
break;
}
if (config->c_reg.mstr & DDRCTRL_MSTR_DDR3)
ret = board_ddr_power_init(STM32MP_DDR3);
else if (config->c_reg.mstr & DDRCTRL_MSTR_LPDDR2)
ret = board_ddr_power_init(STM32MP_LPDDR2);
else if (config->c_reg.mstr & DDRCTRL_MSTR_LPDDR3)
ret = board_ddr_power_init(STM32MP_LPDDR3);
else if (config->c_reg.mstr & DDRCTRL_MSTR_LPDDR2) {
if (bus_width == 32)
ret = board_ddr_power_init(STM32MP_LPDDR2_32);
else
ret = board_ddr_power_init(STM32MP_LPDDR2_16);
} else if (config->c_reg.mstr & DDRCTRL_MSTR_LPDDR3) {
if (bus_width == 32)
ret = board_ddr_power_init(STM32MP_LPDDR3_32);
else
ret = board_ddr_power_init(STM32MP_LPDDR3_16);
}
if (ret)
panic("ddr power init failed\n");