u-boot/board/st/stm32mp1/board.c
Patrick Delaunay f8598d9815 board: st: add generic board for STM32MP1 family
Add first support for STM32MP157C-ED1 board with "Basic" boot chain
1/ Boot Rom: load SPL with STM32 image header in SYSRAM
2/ SPL: power up and initialize the DDR and load U-Boot image
        from SDCARD in DDR
3/ U-Boot: search and load extlinux.conf in SDCARD
           (DISTRO activated)

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2018-03-19 16:14:22 -04:00

75 lines
1.6 KiB
C

/*
* Copyright (C) 2018, STMicroelectronics - All Rights Reserved
*
* SPDX-License-Identifier: GPL-2.0+ BSD-3-Clause
*/
#include <common.h>
#include <dm.h>
#include <asm/io.h>
#include <asm/arch/ddr.h>
#include <power/pmic.h>
#include <power/stpmu1.h>
#ifdef CONFIG_PMIC_STPMU1
int board_ddr_power_init(void)
{
struct udevice *dev;
int ret;
ret = uclass_get_device_by_driver(UCLASS_PMIC,
DM_GET_DRIVER(pmic_stpmu1), &dev);
if (ret)
/* No PMIC on board */
return 0;
/* Set LDO3 to sync mode */
ret = pmic_reg_read(dev, STPMU1_LDOX_CTRL_REG(STPMU1_LDO3));
if (ret < 0)
return ret;
ret &= ~STPMU1_LDO3_MODE;
ret &= ~STPMU1_LDO12356_OUTPUT_MASK;
ret |= STPMU1_LDO3_DDR_SEL << STPMU1_LDO12356_OUTPUT_SHIFT;
ret = pmic_reg_write(dev, STPMU1_LDOX_CTRL_REG(STPMU1_LDO3),
ret);
if (ret < 0)
return ret;
/* Set BUCK2 to 1.35V */
ret = pmic_clrsetbits(dev,
STPMU1_BUCKX_CTRL_REG(STPMU1_BUCK2),
STPMU1_BUCK_OUTPUT_MASK,
STPMU1_BUCK2_1350000V);
if (ret < 0)
return ret;
/* Enable BUCK2 and VREF */
ret = pmic_clrsetbits(dev,
STPMU1_BUCKX_CTRL_REG(STPMU1_BUCK2),
STPMU1_BUCK_EN, STPMU1_BUCK_EN);
if (ret < 0)
return ret;
mdelay(STPMU1_DEFAULT_START_UP_DELAY_MS);
ret = pmic_clrsetbits(dev, STPMU1_VREF_CTRL_REG,
STPMU1_VREF_EN, STPMU1_VREF_EN);
if (ret < 0)
return ret;
mdelay(STPMU1_DEFAULT_START_UP_DELAY_MS);
/* Enable LDO3 */
ret = pmic_clrsetbits(dev,
STPMU1_LDOX_CTRL_REG(STPMU1_LDO3),
STPMU1_LDO_EN, STPMU1_LDO_EN);
if (ret < 0)
return ret;
mdelay(STPMU1_DEFAULT_START_UP_DELAY_MS);
return 0;
}
#endif