hekate/bdk/soc/pmc.c

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/*
* Copyright (c) 2020 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
*/
#include <soc/pmc.h>
#include <soc/t210.h>
#include <utils/util.h>
int pmc_enable_partition(u32 part, int enable)
{
u32 part_mask = 1 << part;
u32 desired_state = enable << part;
// Check if the partition has the state we want.
if ((PMC(APBDEV_PMC_PWRGATE_STATUS) & part_mask) == desired_state)
return 1;
u32 i = 5001;
while (PMC(APBDEV_PMC_PWRGATE_TOGGLE) & 0x100)
{
usleep(1);
i--;
if (i < 1)
return 0;
}
// Toggle power gating.
PMC(APBDEV_PMC_PWRGATE_TOGGLE) = part | 0x100;
i = 5001;
while (i > 0)
{
if ((PMC(APBDEV_PMC_PWRGATE_STATUS) & part_mask) == desired_state)
break;
usleep(1);
i--;
}
return 1;
}