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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2015, 2017-2018, 2022, The Linux Foundation. All rights reserved.
*/
#ifndef __QCOM_GDSC_H__
#define __QCOM_GDSC_H__
#include <linux/err.h>
#include <linux/pm_domain.h>
struct regmap;
struct regulator;
struct reset_controller_dev;
/**
* struct gdsc - Globally Distributed Switch Controller
* @pd: generic power domain
* @regmap: regmap for MMIO accesses
* @gdscr: gsdc control register
* @collapse_ctrl: APCS collapse-vote register
* @collapse_mask: APCS collapse-vote mask
* @gds_hw_ctrl: gds_hw_ctrl register
* @cxcs: offsets of branch registers to toggle mem/periph bits in
* @cxc_count: number of @cxcs
* @pwrsts: Possible powerdomain power states
* @en_rest_wait_val: transition delay value for receiving enr ack signal
* @en_few_wait_val: transition delay value for receiving enf ack signal
* @clk_dis_wait_val: transition delay value for halting clock
* @resets: ids of resets associated with this gdsc
* @reset_count: number of @resets
* @rcdev: reset controller
*/
struct gdsc {
struct generic_pm_domain pd;
struct generic_pm_domain *parent;
struct regmap *regmap;
unsigned int gdscr;
unsigned int collapse_ctrl;
unsigned int collapse_mask;
unsigned int gds_hw_ctrl;
unsigned int clamp_io_ctrl;
unsigned int *cxcs;
unsigned int cxc_count;
unsigned int en_rest_wait_val;
unsigned int en_few_wait_val;
unsigned int clk_dis_wait_val;
const u8 pwrsts;
/* Powerdomain allowable state bitfields */
#define PWRSTS_OFF BIT(0)
/*
* There is no SW control to transition a GDSC into
* PWRSTS_RET. This happens in HW when the parent
* domain goes down to a low power state
*/
#define PWRSTS_RET BIT(1)
#define PWRSTS_ON BIT(2)
#define PWRSTS_OFF_ON (PWRSTS_OFF | PWRSTS_ON)
#define PWRSTS_RET_ON (PWRSTS_RET | PWRSTS_ON)
const u16 flags;
#define VOTABLE BIT(0)
#define CLAMP_IO BIT(1)
#define HW_CTRL BIT(2)
#define SW_RESET BIT(3)
#define AON_RESET BIT(4)
#define POLL_CFG_GDSCR BIT(5)
#define ALWAYS_ON BIT(6)
#define RETAIN_FF_ENABLE BIT(7)
#define NO_RET_PERIPH BIT(8)
struct reset_controller_dev *rcdev;
unsigned int *resets;
unsigned int reset_count;
const char *supply;
struct regulator *rsupply;
};
struct gdsc_desc {
struct device *dev;
struct gdsc **scs;
size_t num;
};
#ifdef CONFIG_QCOM_GDSC
int gdsc_register(struct gdsc_desc *desc, struct reset_controller_dev *,
struct regmap *);
void gdsc_unregister(struct gdsc_desc *desc);
int gdsc_gx_do_nothing_enable(struct generic_pm_domain *domain);
#else
static inline int gdsc_register(struct gdsc_desc *desc,
struct reset_controller_dev *rcdev,
struct regmap *r)
{
return -ENOSYS;
}
static inline void gdsc_unregister(struct gdsc_desc *desc) {};
#endif /* CONFIG_QCOM_GDSC */
#endif /* __QCOM_GDSC_H__ */
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