42 lines
881 B
C
42 lines
881 B
C
/*
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* Copyright (c) 2020, Google LLC. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <drivers/delay_timer.h>
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#include <qti_plat.h>
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#include <spmi_arb.h>
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/*
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* This driver implements PON support for PM8998-compatible PMICs. This can
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* include other part numbers like PM6150.
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*/
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#define RESET_TYPE_WARM_RESET 1
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#define RESET_TYPE_SHUTDOWN 4
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#define S2_RESET_EN BIT(7)
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static void configure_ps_hold(uint32_t reset_type)
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{
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/* QTI recommends disabling reset for 10 cycles before reconfiguring. */
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spmi_arb_write8(PON_PS_HOLD_RESET_CTL2, 0);
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mdelay(1);
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spmi_arb_write8(PON_PS_HOLD_RESET_CTL, reset_type);
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spmi_arb_write8(PON_PS_HOLD_RESET_CTL2, S2_RESET_EN);
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mdelay(1);
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}
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void qti_pmic_prepare_reset(void)
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{
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configure_ps_hold(RESET_TYPE_WARM_RESET);
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}
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void qti_pmic_prepare_shutdown(void)
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{
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configure_ps_hold(RESET_TYPE_SHUTDOWN);
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}
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