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/*
*
* Adaptive Body Bias programming sequence for OMAP5 family
*
* (C) Copyright 2013
* Texas Instruments, <www.ti.com>
*
* Andrii Tseglytskyi <andrii.tseglytskyi@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/io.h>
/*
* Setup LDOVBB for OMAP5.
* On OMAP5+ some ABB settings are fused. They are handled
* in the following way:
*
* 1. corresponding EFUSE register contains ABB enable bit
* and VSET value
* 2. If ABB enable bit is set to 1, than ABB should be
* enabled, otherwise ABB should be disabled
* 3. If ABB is enabled, than VSET value should be copied
* to corresponding MUX control register
*/
s8 abb_setup_ldovbb(u32 fuse, u32 ldovbb)
{
u32 vset;
/*
* ABB parameters must be properly fused
* otherwise ABB should be disabled
*/
vset = readl(fuse);
if (!(vset & OMAP5_ABB_FUSE_ENABLE_MASK))
return -1;
/* prepare VSET value for LDOVBB mux register */
vset &= OMAP5_ABB_FUSE_VSET_MASK;
vset >>= ffs(OMAP5_ABB_FUSE_VSET_MASK) - 1;
vset <<= ffs(OMAP5_ABB_LDOVBBMPU_VSET_OUT_MASK) - 1;
vset |= OMAP5_ABB_LDOVBBMPU_MUX_CTRL_MASK;
/* setup LDOVBB using fused value */
clrsetbits_le32(ldovbb, OMAP5_ABB_LDOVBBMPU_VSET_OUT_MASK, vset);
return 0;
}
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