mirror of
https://github.com/brain-hackers/u-boot-brain
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2ed8c878eb
This enables the VMMC2 LDO, which powers the MMC2 device. When the device starts from MMC2, this has already been enabled by the BootROM, but when starting from peripheral boot (USB, UART), it is not the case. Signed-off-by: Paul Kocialkowski <contact@paulk.fr> Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
108 lines
2.9 KiB
C
108 lines
2.9 KiB
C
/*
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* Copyright (c) 2009 Wind River Systems, Inc.
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* Tom Rix <Tom.Rix at windriver.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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* twl4030_power_reset_init is derived from code on omapzoom,
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* git://git.omapzoom.com/repo/u-boot.git
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*
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* Copyright (C) 2007-2009 Texas Instruments, Inc.
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*
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* twl4030_power_init is from cpu/omap3/common.c, power_init_r
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*
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* (C) Copyright 2004-2008
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* Texas Instruments, <www.ti.com>
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*
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* Author :
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* Sunil Kumar <sunilsaini05 at gmail.com>
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* Shashi Ranjan <shashiranjanmca05 at gmail.com>
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*
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* Derived from Beagle Board and 3430 SDP code by
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* Richard Woodruff <r-woodruff2 at ti.com>
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* Syed Mohammed Khasim <khasim at ti.com>
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*/
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#include <twl4030.h>
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/*
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* Power Reset
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*/
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void twl4030_power_reset_init(void)
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{
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u8 val = 0;
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if (twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER,
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TWL4030_PM_MASTER_P1_SW_EVENTS, &val)) {
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printf("Error:TWL4030: failed to read the power register\n");
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printf("Could not initialize hardware reset\n");
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} else {
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val |= TWL4030_PM_MASTER_SW_EVENTS_STOPON_PWRON;
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if (twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER,
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TWL4030_PM_MASTER_P1_SW_EVENTS, val)) {
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printf("Error:TWL4030: failed to write the power register\n");
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printf("Could not initialize hardware reset\n");
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}
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}
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}
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/*
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* Set Device Group and Voltage
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*/
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void twl4030_pmrecv_vsel_cfg(u8 vsel_reg, u8 vsel_val,
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u8 dev_grp, u8 dev_grp_sel)
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{
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int ret;
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/* Select the Voltage */
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ret = twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, vsel_reg,
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vsel_val);
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if (ret != 0) {
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printf("Could not write vsel to reg %02x (%d)\n",
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vsel_reg, ret);
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return;
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}
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/* Select the Device Group (enable the supply if dev_grp_sel != 0) */
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ret = twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, dev_grp,
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dev_grp_sel);
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if (ret != 0)
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printf("Could not write grp_sel to reg %02x (%d)\n",
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dev_grp, ret);
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}
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void twl4030_power_init(void)
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{
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/* set VAUX3 to 2.8V */
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twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX3_DEDICATED,
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TWL4030_PM_RECEIVER_VAUX3_VSEL_28,
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TWL4030_PM_RECEIVER_VAUX3_DEV_GRP,
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TWL4030_PM_RECEIVER_DEV_GRP_P1);
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/* set VPLL2 to 1.8V */
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twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VPLL2_DEDICATED,
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TWL4030_PM_RECEIVER_VPLL2_VSEL_18,
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TWL4030_PM_RECEIVER_VPLL2_DEV_GRP,
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TWL4030_PM_RECEIVER_DEV_GRP_ALL);
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/* set VDAC to 1.8V */
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twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VDAC_DEDICATED,
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TWL4030_PM_RECEIVER_VDAC_VSEL_18,
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TWL4030_PM_RECEIVER_VDAC_DEV_GRP,
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TWL4030_PM_RECEIVER_DEV_GRP_P1);
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}
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void twl4030_power_mmc_init(void)
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{
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/* Set VMMC1 to 3.15 Volts */
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twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VMMC1_DEDICATED,
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TWL4030_PM_RECEIVER_VMMC1_VSEL_32,
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TWL4030_PM_RECEIVER_VMMC1_DEV_GRP,
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TWL4030_PM_RECEIVER_DEV_GRP_P1);
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/* Set VMMC2 to 3.15 Volts */
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twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VMMC2_DEDICATED,
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TWL4030_PM_RECEIVER_VMMC2_VSEL_32,
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TWL4030_PM_RECEIVER_VMMC2_DEV_GRP,
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TWL4030_PM_RECEIVER_DEV_GRP_P1);
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}
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