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/*
* Copyright (c) 2020, Google LLC. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <drivers/delay_timer.h>
#include <qti_plat.h>
#include <spmi_arb.h>
/*
* This driver implements PON support for PM8998-compatible PMICs. This can
* include other part numbers like PM6150.
*/
#define PON_PS_HOLD_RESET_CTL 0x85a
#define RESET_TYPE_WARM_RESET 1
#define RESET_TYPE_SHUTDOWN 4
#define PON_PS_HOLD_RESET_CTL2 0x85b
#define S2_RESET_EN BIT(7)
static void configure_ps_hold(uint32_t reset_type)
{
/* QTI recommends disabling reset for 10 cycles before reconfiguring. */
spmi_arb_write8(PON_PS_HOLD_RESET_CTL2, 0);
mdelay(1);
spmi_arb_write8(PON_PS_HOLD_RESET_CTL, reset_type);
spmi_arb_write8(PON_PS_HOLD_RESET_CTL2, S2_RESET_EN);
mdelay(1);
}
void qti_pmic_prepare_reset(void)
{
configure_ps_hold(RESET_TYPE_WARM_RESET);
}
void qti_pmic_prepare_shutdown(void)
{
configure_ps_hold(RESET_TYPE_SHUTDOWN);
}
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