| Patrick Delaunay | 8eb3b1e | 2018-03-12 10:46:18 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018, STMicroelectronics - All Rights Reserved |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0+ BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <common.h> |
| 8 | #include <dm.h> |
| 9 | #include <asm/io.h> |
| 10 | #include <asm/arch/ddr.h> |
| 11 | #include <power/pmic.h> |
| 12 | #include <power/stpmu1.h> |
| 13 | |
| 14 | #ifdef CONFIG_PMIC_STPMU1 |
| 15 | int board_ddr_power_init(void) |
| 16 | { |
| 17 | struct udevice *dev; |
| 18 | int ret; |
| 19 | |
| 20 | ret = uclass_get_device_by_driver(UCLASS_PMIC, |
| 21 | DM_GET_DRIVER(pmic_stpmu1), &dev); |
| 22 | if (ret) |
| 23 | /* No PMIC on board */ |
| 24 | return 0; |
| 25 | |
| 26 | /* Set LDO3 to sync mode */ |
| 27 | ret = pmic_reg_read(dev, STPMU1_LDOX_CTRL_REG(STPMU1_LDO3)); |
| 28 | if (ret < 0) |
| 29 | return ret; |
| 30 | |
| 31 | ret &= ~STPMU1_LDO3_MODE; |
| 32 | ret &= ~STPMU1_LDO12356_OUTPUT_MASK; |
| 33 | ret |= STPMU1_LDO3_DDR_SEL << STPMU1_LDO12356_OUTPUT_SHIFT; |
| 34 | |
| 35 | ret = pmic_reg_write(dev, STPMU1_LDOX_CTRL_REG(STPMU1_LDO3), |
| 36 | ret); |
| 37 | if (ret < 0) |
| 38 | return ret; |
| 39 | |
| 40 | /* Set BUCK2 to 1.35V */ |
| 41 | ret = pmic_clrsetbits(dev, |
| 42 | STPMU1_BUCKX_CTRL_REG(STPMU1_BUCK2), |
| 43 | STPMU1_BUCK_OUTPUT_MASK, |
| 44 | STPMU1_BUCK2_1350000V); |
| 45 | if (ret < 0) |
| 46 | return ret; |
| 47 | |
| 48 | /* Enable BUCK2 and VREF */ |
| 49 | ret = pmic_clrsetbits(dev, |
| 50 | STPMU1_BUCKX_CTRL_REG(STPMU1_BUCK2), |
| 51 | STPMU1_BUCK_EN, STPMU1_BUCK_EN); |
| 52 | if (ret < 0) |
| 53 | return ret; |
| 54 | |
| 55 | mdelay(STPMU1_DEFAULT_START_UP_DELAY_MS); |
| 56 | |
| 57 | ret = pmic_clrsetbits(dev, STPMU1_VREF_CTRL_REG, |
| 58 | STPMU1_VREF_EN, STPMU1_VREF_EN); |
| 59 | if (ret < 0) |
| 60 | return ret; |
| 61 | |
| 62 | mdelay(STPMU1_DEFAULT_START_UP_DELAY_MS); |
| 63 | |
| 64 | /* Enable LDO3 */ |
| 65 | ret = pmic_clrsetbits(dev, |
| 66 | STPMU1_LDOX_CTRL_REG(STPMU1_LDO3), |
| 67 | STPMU1_LDO_EN, STPMU1_LDO_EN); |
| 68 | if (ret < 0) |
| 69 | return ret; |
| 70 | |
| 71 | mdelay(STPMU1_DEFAULT_START_UP_DELAY_MS); |
| 72 | |
| 73 | return 0; |
| 74 | } |
| 75 | #endif |