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f3e85e4825
Not every device has multiple MMC slots available, so it makes sense to enable only the required LDOs for the available slots. Generic code in omap_hsmmc will enable both VMMC1 and VMMC2, in doubt. Signed-off-by: Paul Kocialkowski <contact@paulk.fr> Reviewed-by: Tom Rini <trini@ti.com>
114 lines
3.1 KiB
C
114 lines
3.1 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(int dev_index)
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{
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if (dev_index == 0) {
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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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mdelay(100); /* ramp-up delay from Linux code */
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} else if (dev_index == 1) {
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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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mdelay(100); /* ramp-up delay from Linux code */
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}
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}
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