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/*
*
* Clock initialization for OMAP5
*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*
* Aneesh V <aneesh@ti.com>
* Sricharan R <r.sricharan@ti.com>
*
* Based on previous work by:
* Santosh Shilimkar <santosh.shilimkar@ti.com>
* Rajendra Nayak <rnayak@ti.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/omap_common.h>
#include <asm/arch/clocks.h>
#include <asm/arch/sys_proto.h>
#include <asm/utils.h>
#include <asm/omap_gpio.h>
#include <asm/emif.h>
#ifndef CONFIG_SPL_BUILD
/*
* printing to console doesn't work unless
* this code is executed from SPL
*/
#define printf(fmt, args...)
#define puts(s)
#endif
/*
* Setup the voltages for vdd_mpu, vdd_core, and vdd_iva
* We set the maximum voltages allowed here because Smart-Reflex is not
* enabled in bootloader. Voltage initialization in the kernel will set
* these to the nominal values after enabling Smart-Reflex
*/
void scale_vcores(void)
{
u32 volt_core, volt_mpu, volt_mm;
omap_vc_init(PRM_VC_I2C_CHANNEL_FREQ_KHZ);
/* Palmas settings */
if (omap_revision() != OMAP5432_ES1_0) {
volt_core = VDD_CORE;
volt_mpu = VDD_MPU;
volt_mm = VDD_MM;
} else {
volt_core = VDD_CORE_5432;
volt_mpu = VDD_MPU_5432;
volt_mm = VDD_MM_5432;
}
do_scale_vcore(SMPS_REG_ADDR_8_CORE, volt_core);
do_scale_vcore(SMPS_REG_ADDR_12_MPU, volt_mpu);
do_scale_vcore(SMPS_REG_ADDR_45_IVA, volt_mm);
if (emif_sdram_type() == EMIF_SDRAM_TYPE_DDR3) {
/* Configure LDO SRAM "magic" bits */
writel(2, (*prcm)->prm_sldo_core_setup);
writel(2, (*prcm)->prm_sldo_mpu_setup);
writel(2, (*prcm)->prm_sldo_mm_setup);
}
}
u32 get_offset_code(u32 volt_offset)
{
u32 offset_code, step = 10000; /* 10 mV represented in uV */
volt_offset -= PALMAS_SMPS_BASE_VOLT_UV;
offset_code = (volt_offset + step - 1) / step;
/*
* Offset codes 1-6 all give the base voltage in Palmas
* Offset code 0 switches OFF the SMPS
*/
return offset_code + 6;
}
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