2020-07-17 21:42:53 +00:00
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/*
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* Copyright (c) 2020 CTCaer
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <soc/pmc.h>
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#include <soc/t210.h>
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#include <utils/util.h>
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int pmc_enable_partition(u32 part, int enable)
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{
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2020-11-25 23:41:45 +00:00
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u32 part_mask = BIT(part);
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2020-07-17 21:42:53 +00:00
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u32 desired_state = enable << part;
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// Check if the partition has the state we want.
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if ((PMC(APBDEV_PMC_PWRGATE_STATUS) & part_mask) == desired_state)
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return 1;
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u32 i = 5001;
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while (PMC(APBDEV_PMC_PWRGATE_TOGGLE) & 0x100)
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{
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usleep(1);
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i--;
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if (i < 1)
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return 0;
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}
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// Toggle power gating.
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PMC(APBDEV_PMC_PWRGATE_TOGGLE) = part | 0x100;
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i = 5001;
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while (i > 0)
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{
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if ((PMC(APBDEV_PMC_PWRGATE_STATUS) & part_mask) == desired_state)
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break;
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usleep(1);
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i--;
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}
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return 1;
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}
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