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stm32mp1: ram: add support for LPDDR2/LPDDR3

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Manage power supply configuration for board using stpmic1
with LPDDR2 or with LPDDR3:
+ VDD_DDR1 = 1.8V with BUCK3 (bypass if possible)
+ VDD_DDR2 = 1.2V with BUCK2

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
This commit is contained in:
Patrick Delaunay
2019-04-10 14:09:26 +02:00
committed by Patrice Chotard
parent 53bb831658
commit 1767ac2d1f
4 changed files with 132 additions and 43 deletions
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11
drivers/ram/stm32mp1/stm32mp1_ddr.c
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@@ -372,7 +372,7 @@ void stm32mp1_refresh_restore(struct stm32mp1_ddrctl *ctl,
}
/* board-specific DDR power initializations. */
__weak int board_ddr_power_init(void)
__weak int board_ddr_power_init(enum ddr_type ddr_type)
{
return 0;
}
@@ -382,9 +382,14 @@ void stm32mp1_ddr_init(struct ddr_info *priv,
const struct stm32mp1_ddr_config *config)
{
u32 pir;
int ret;
int ret = -EINVAL;
ret = board_ddr_power_init();
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);
if (ret)
panic("ddr power init failed\n");