path: root/drivers/soc/qcom/rpmhpd.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2018, The Linux Foundation. All rights reserved.*/

#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/pm_domain.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
#include <soc/qcom/cmd-db.h>
#include <soc/qcom/rpmh.h>
#include <dt-bindings/power/qcom-rpmpd.h>

#define domain_to_rpmhpd(domain) container_of(domain, struct rpmhpd, pd)

#define RPMH_ARC_MAX_LEVELS	16

/**
 * struct rpmhpd - top level RPMh power domain resource data structure
 * @dev:		rpmh power domain controller device
 * @pd:			generic_pm_domain corrresponding to the power domain
 * @parent:		generic_pm_domain corrresponding to the parent's power domain
 * @peer:		A peer power domain in case Active only Voting is
 *			supported
 * @active_only:	True if it represents an Active only peer
 * @corner:		current corner
 * @active_corner:	current active corner
 * @level:		An array of level (vlvl) to corner (hlvl) mappings
 *			derived from cmd-db
 * @level_count:	Number of levels supported by the power domain. max
 *			being 16 (0 - 15)
 * @enabled:		true if the power domain is enabled
 * @res_name:		Resource name used for cmd-db lookup
 * @addr:		Resource address as looped up using resource name from
 *			cmd-db
 */
struct rpmhpd {
	struct device	*dev;
	struct generic_pm_domain pd;
	struct generic_pm_domain *parent;
	struct rpmhpd	*peer;
	const bool	active_only;
	unsigned int	corner;
	unsigned int	active_corner;
	u32		level[RPMH_ARC_MAX_LEVELS];
	size_t		level_count;
	bool		enabled;
	const char	*res_name;
	u32		addr;
};

struct rpmhpd_desc {
	struct rpmhpd **rpmhpds;
	size_t num_pds;
};

static DEFINE_MUTEX(rpmhpd_lock);

/* SDM845 RPMH powerdomains */

static struct rpmhpd sdm845_ebi = {
	.pd = { .name = "ebi", },
	.res_name = "ebi.lvl",
};

static struct rpmhpd sdm845_lmx = {
	.pd = { .name = "lmx", },
	.res_name = "lmx.lvl",
};

static struct rpmhpd sdm845_lcx = {
	.pd = { .name = "lcx", },
	.res_name = "lcx.lvl",
};

static struct rpmhpd sdm845_gfx = {
	.pd = { .name = "gfx", },
	.res_name = "gfx.lvl",
};

static struct rpmhpd sdm845_mss = {
	.pd = { .name = "mss", },
	.res_name = "mss.lvl",
};

static struct rpmhpd sdm845_mx_ao;
static struct rpmhpd sdm845_mx = {
	.pd = { .name = "mx", },
	.peer = &sdm845_mx_ao,
	.res_name = "mx.lvl",
};

static struct rpmhpd sdm845_mx_ao = {
	.pd = { .name = "mx_ao", },
	.active_only = true,
	.peer = &sdm845_mx,
	.res_name = "mx.lvl",
};

static struct rpmhpd sdm845_cx_ao;
static struct rpmhpd sdm845_cx = {
	.pd = { .name = "cx", },
	.peer = &sdm845_cx_ao,
	.parent = &sdm845_mx.pd,
	.res_name = "cx.lvl",
};

static struct rpmhpd sdm845_cx_ao = {
	.pd = { .name = "cx_ao", },
	.active_only = true,
	.peer = &sdm845_cx,
	.parent = &sdm845_mx_ao.pd,
	.res_name = "cx.lvl",
};

static struct rpmhpd *sdm845_rpmhpds[] = {
	[SDM845_EBI] = &sdm845_ebi,
	[SDM845_MX] = &sdm845_mx,
	[SDM845_MX_AO] = &sdm845_mx_ao,
	[SDM845_CX] = &sdm845_cx,
	[SDM845_CX_AO] = &sdm845_cx_ao,
	[SDM845_LMX] = &sdm845_lmx,
	[SDM845_LCX] = &sdm845_lcx,
	[SDM845_GFX] = &sdm845_gfx,
	[SDM845_MSS] = &sdm845_mss,
};

static const struct rpmhpd_desc sdm845_desc = {
	.rpmhpds = sdm845_rpmhpds,
	.num_pds = ARRAY_SIZE(sdm845_rpmhpds),
};

/* SDX55 RPMH powerdomains */
static struct rpmhpd *sdx55_rpmhpds[] = {
	[SDX55_MSS] = &sdm845_mss,
	[SDX55_MX] = &sdm845_mx,
	[SDX55_CX] = &sdm845_cx,
};

static const struct rpmhpd_desc sdx55_desc = {
	.rpmhpds = sdx55_rpmhpds,
	.num_pds = ARRAY_SIZE(sdx55_rpmhpds),
};

/* SM8150 RPMH powerdomains */

static struct rpmhpd sm8150_mmcx_ao;
static struct rpmhpd sm8150_mmcx = {
	.pd = { .name = "mmcx", },
	.peer = &sm8150_mmcx_ao,
	.res_name = "mmcx.lvl",
};

static struct rpmhpd sm8150_mmcx_ao = {
	.pd = { .name = "mmcx_ao", },
	.active_only = true,
	.peer = &sm8150_mmcx,
	.res_name = "mmcx.lvl",
};

static struct rpmhpd *sm8150_rpmhpds[] = {
	[SM8150_MSS] = &sdm845_mss,
	[SM8150_EBI] = &sdm845_ebi,
	[SM8150_LMX] = &sdm845_lmx,
	[SM8150_LCX] = &sdm845_lcx,
	[SM8150_GFX] = &sdm845_gfx,
	[SM8150_MX] = &sdm845_mx,
	[SM8150_MX_AO] = &sdm845_mx_ao,
	[SM8150_CX] = &sdm845_cx,
	[SM8150_CX_AO] = &sdm845_cx_ao,
	[SM8150_MMCX] = &sm8150_mmcx,
	[SM8150_MMCX_AO] = &sm8150_mmcx_ao,
};

static const struct rpmhpd_desc sm8150_desc = {
	.rpmhpds = sm8150_rpmhpds,
	.num_pds = ARRAY_SIZE(sm8150_rpmhpds),
};

static struct rpmhpd *sm8250_rpmhpds[] = {
	[SM8250_CX] = &sdm845_cx,
	[SM8250_CX_AO] = &sdm845_cx_ao,
	[SM8250_EBI] = &sdm845_ebi,
	[SM8250_GFX] = &sdm845_gfx,
	[SM8250_LCX] = &sdm845_lcx,
	[SM8250_LMX] = &sdm845_lmx,
	[SM8250_MMCX] = &sm8150_mmcx,
	[SM8250_MMCX_AO] = &sm8150_mmcx_ao,
	[SM8250_MX] = &sdm845_mx,
	[SM8250_MX_AO] = &sdm845_mx_ao,
};

static const struct rpmhpd_desc sm8250_desc = {
	.rpmhpds = sm8250_rpmhpds,
	.num_pds = ARRAY_SIZE(sm8250_rpmhpds),
};

/* SC7180 RPMH powerdomains */
static struct rpmhpd *sc7180_rpmhpds[] = {
	[SC7180_CX] = &sdm845_cx,
	[SC7180_CX_AO] = &sdm845_cx_ao,
	[SC7180_GFX] = &sdm845_gfx,
	[SC7180_MX] = &sdm845_mx,
	[SC7180_MX_AO] = &sdm845_mx_ao,
	[SC7180_LMX] = &sdm845_lmx,
	[SC7180_LCX] = &sdm845_lcx,
	[SC7180_MSS] = &sdm845_mss,
};

static const struct rpmhpd_desc sc7180_desc = {
	.rpmhpds = sc7180_rpmhpds,
	.num_pds = ARRAY_SIZE(sc7180_rpmhpds),
};

static const struct of_device_id rpmhpd_match_table[] = {
	{ .compatible = "qcom,sc7180-rpmhpd", .data = &sc7180_desc },
	{ .compatible = "qcom,sdm845-rpmhpd", .data = &sdm845_desc },
	{ .compatible = "qcom,sdx55-rpmhpd", .data = &sdx55_desc},
	{ .compatible = "qcom,sm8150-rpmhpd", .data = &sm8150_desc },
	{ .compatible = "qcom,sm8250-rpmhpd"