Quelle  rpmhpd.c   Sprache: C

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

#include <linux/cleanup.h>
#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/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>
#include <dt-bindings/power/qcom,rpmhpd.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 corresponding to the power domain
 * @parent: generic_pm_domain corresponding 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
 * @enable_corner: lowest non-zero 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
 * @state_synced: Indicator that sync_state has been invoked for the rpmhpd resource
 * @skip_retention_level: Indicate that retention level should not be used for the power domain
 */
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;
 unsigned int enable_corner;
 u32  level[RPMH_ARC_MAX_LEVELS];
 size_t  level_count;
 bool  enabled;
 const char *res_name;
 u32  addr;
 bool  state_synced;
 bool            skip_retention_level;
};

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

static DEFINE_MUTEX(rpmhpd_lock);

/* RPMH powerdomains */

static struct rpmhpd cx_ao;
static struct rpmhpd mx;
static struct rpmhpd mx_ao;
static struct rpmhpd cx = {
 .pd = { .name = "cx", },
 .peer = &cx_ao,
 .res_name = "cx.lvl",
};

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

static struct rpmhpd cx_ao_w_mx_parent;
static struct rpmhpd cx_w_mx_parent = {
 .pd = { .name = "cx", },
 .peer = &cx_ao_w_mx_parent,
 .parent = &mx.pd,
 .res_name = "cx.lvl",
};

static struct rpmhpd cx_ao_w_mx_parent = {
 .pd = { .name = "cx_ao", },
 .active_only = true,
 .peer = &cx_w_mx_parent,
 .parent = &mx_ao.pd,
 .res_name = "cx.lvl",
};

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

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

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

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

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

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

static struct rpmhpd mmcx_ao_w_cx_parent;
static struct rpmhpd mmcx_w_cx_parent = {
 .pd = { .name = "mmcx", },
 .peer = &mmcx_ao_w_cx_parent,
 .parent = &cx.pd,
 .res_name = "mmcx.lvl",
};

static struct rpmhpd mmcx_ao_w_cx_parent = {
 .pd = { .name = "mmcx_ao", },
 .active_only = true,
 .peer = &mmcx_w_cx_parent,
 .parent = &cx_ao.pd,
 .res_name = "mmcx.lvl",
};

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

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

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

static struct rpmhpd mxc_ao;
static struct rpmhpd mxc = {
 .pd = { .name = "mxc", },
 .peer = &mxc_ao,
 .res_name = "mxc.lvl",
 .skip_retention_level = true,
};

static struct rpmhpd mxc_ao = {
 .pd = { .name = "mxc_ao", },
 .active_only = true,
 .peer = &mxc,
 .res_name = "mxc.lvl",
 .skip_retention_level = true,
};

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

static struct rpmhpd nsp0 = {
 .pd = { .name = "nsp0", },
 .res_name = "nsp0.lvl",
};

static struct rpmhpd nsp1 = {
 .pd = { .name = "nsp1", },
 .res_name = "nsp1.lvl",
};

static struct rpmhpd nsp2 = {
 .pd = { .name = "nsp2", },
 .res_name = "nsp2.lvl",
};

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

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

/* Milos RPMH powerdomains */
static struct rpmhpd *milos_rpmhpds[] = {
 [RPMHPD_CX] = &cx,
 [RPMHPD_CX_AO] = &cx_ao,
 [RPMHPD_EBI] = &ebi,
 [RPMHPD_GFX] = &gfx,
 [RPMHPD_LCX] = &lcx,
 [RPMHPD_LMX] = &lmx,
 [RPMHPD_MSS] = &mss,
 [RPMHPD_MX] = &mx,
 [RPMHPD_MX_AO] = &mx_ao,
};

static const struct rpmhpd_desc milos_desc = {
 .rpmhpds = milos_rpmhpds,
 .num_pds = ARRAY_SIZE(milos_rpmhpds),
};

/* SA8540P RPMH powerdomains */
static struct rpmhpd *sa8540p_rpmhpds[] = {
 [SC8280XP_CX] = &cx,
 [SC8280XP_CX_AO] = &cx_ao,
 [SC8280XP_EBI] = &ebi,
 [SC8280XP_LCX] = &lcx,
 [SC8280XP_LMX] = &lmx,
 [SC8280XP_MMCX] = &mmcx,
 [SC8280XP_MMCX_AO] = &mmcx_ao,
 [SC8280XP_MX] = &mx,
 [SC8280XP_MX_AO] = &mx_ao,
 [SC8280XP_NSP] = &nsp,
};

static const struct rpmhpd_desc sa8540p_desc = {
 .rpmhpds = sa8540p_rpmhpds,
 .num_pds = ARRAY_SIZE(sa8540p_rpmhpds),
};

/* SA8775P RPMH power domains */
static struct rpmhpd *sa8775p_rpmhpds[] = {
 [SA8775P_CX] = &cx,
 [SA8775P_CX_AO] = &cx_ao,
 [SA8775P_EBI] = &ebi,
 [SA8775P_GFX] = &gfx,
 [SA8775P_LCX] = &lcx,
 [SA8775P_LMX] = &lmx,
 [SA8775P_MMCX] = &mmcx,
 [SA8775P_MMCX_AO] = &mmcx_ao,
 [SA8775P_MXC] = &mxc,
 [SA8775P_MXC_AO] = &mxc_ao,
 [SA8775P_MX] = &mx,
 [SA8775P_MX_AO] = &mx_ao,
 [SA8775P_NSP0] = &nsp0,
 [SA8775P_NSP1] = &nsp1,
};

static const struct rpmhpd_desc sa8775p_desc = {
 .rpmhpds = sa8775p_rpmhpds,
 .num_pds = ARRAY_SIZE(sa8775p_rpmhpds),
};

/* SAR2130P RPMH powerdomains */
static struct rpmhpd *sar2130p_rpmhpds[] = {
 [RPMHPD_CX] = &cx,
 [RPMHPD_CX_AO] = &cx_ao,
 [RPMHPD_EBI] = &ebi,
 [RPMHPD_GFX] = &gfx,
 [RPMHPD_LCX] = &lcx,
 [RPMHPD_LMX] = &lmx,
 [RPMHPD_MMCX] = &mmcx_w_cx_parent,
 [RPMHPD_MMCX_AO] = &mmcx_ao_w_cx_parent,
 [RPMHPD_MSS] = &mss,
 [RPMHPD_MX] = &mx,
 [RPMHPD_MX_AO] = &mx_ao,
 [RPMHPD_MXC] = &mxc,
 [RPMHPD_MXC_AO] = &mxc_ao,
 [RPMHPD_NSP] = &nsp,
 [RPMHPD_QPHY] = &qphy,
};

static const struct rpmhpd_desc sar2130p_desc = {
 .rpmhpds = sar2130p_rpmhpds,
 .num_pds = ARRAY_SIZE(sar2130p_rpmhpds),
};

/* SDM670 RPMH powerdomains */
static struct rpmhpd *sdm670_rpmhpds[] = {
 [SDM670_CX] = &cx_w_mx_parent,
 [SDM670_CX_AO] = &cx_ao_w_mx_parent,
 [SDM670_GFX] = &gfx,
 [SDM670_LCX] = &lcx,
 [SDM670_LMX] = &lmx,
 [SDM670_MSS] = &mss,
 [SDM670_MX] = &mx,
 [SDM670_MX_AO] = &mx_ao,
};

static const struct rpmhpd_desc sdm670_desc = {
 .rpmhpds = sdm670_rpmhpds,
 .num_pds = ARRAY_SIZE(sdm670_rpmhpds),
};

/* SDM845 RPMH powerdomains */
static struct rpmhpd *sdm845_rpmhpds[] = {
 [SDM845_CX] = &cx_w_mx_parent,
 [SDM845_CX_AO] = &cx_ao_w_mx_parent,
 [SDM845_EBI] = &ebi,
 [SDM845_GFX] = &gfx,
 [SDM845_LCX] = &lcx,
 [SDM845_LMX] = &lmx,
 [SDM845_MSS] = &mss,
 [SDM845_MX] = &mx,
 [SDM845_MX_AO] = &mx_ao,
};

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_CX] = &cx_w_mx_parent,
 [SDX55_MSS] = &mss,
 [SDX55_MX] = &mx,
};

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

/* SDX65 RPMH powerdomains */
static struct rpmhpd *sdx65_rpmhpds[] = {
 [SDX65_CX] = &cx_w_mx_parent,
 [SDX65_CX_AO] = &cx_ao_w_mx_parent,
 [SDX65_MSS] = &mss,
 [SDX65_MX] = &mx,
 [SDX65_MX_AO] = &mx_ao,
 [SDX65_MXC] = &mxc,
};

static const struct rpmhpd_desc sdx65_desc = {
 .rpmhpds = sdx65_rpmhpds,
 .num_pds = ARRAY_SIZE(sdx65_rpmhpds),
};

/* SDX75 RPMH powerdomains */
static struct rpmhpd *sdx75_rpmhpds[] = {
 [RPMHPD_CX] = &cx,
 [RPMHPD_CX_AO] = &cx_ao,
 [RPMHPD_MSS] = &mss,
 [RPMHPD_MX] = &mx,
 [RPMHPD_MX_AO] = &mx_ao,
 [RPMHPD_MXC] = &mxc,
};

static const struct rpmhpd_desc sdx75_desc = {
 .rpmhpds = sdx75_rpmhpds,
 .num_pds = ARRAY_SIZE(sdx75_rpmhpds),
};

/* SM4450 RPMH powerdomains */
static struct rpmhpd *sm4450_rpmhpds[] = {
 [RPMHPD_CX] = &cx,
 [RPMHPD_CX_AO] = &cx_ao,
 [RPMHPD_EBI] = &ebi,
 [RPMHPD_LMX] = &lmx,
 [RPMHPD_MSS] = &mss,
 [RPMHPD_MX] = &mx,
};

static const struct rpmhpd_desc sm4450_desc = {
 .rpmhpds = sm4450_rpmhpds,
 .num_pds = ARRAY_SIZE(sm4450_rpmhpds),
};

/* SM6350 RPMH powerdomains */
static struct rpmhpd *sm6350_rpmhpds[] = {
 [SM6350_CX] = &cx_w_mx_parent,
 [SM6350_GFX] = &gfx,
 [SM6350_LCX] = &lcx,
 [SM6350_LMX] = &lmx,
 [SM6350_MSS] = &mss,
 [SM6350_MX] = &mx,
};

static const struct rpmhpd_desc sm6350_desc = {
 .rpmhpds = sm6350_rpmhpds,
 .num_pds = ARRAY_SIZE(sm6350_rpmhpds),
};

/* SM7150 RPMH powerdomains */
static struct rpmhpd *sm7150_rpmhpds[] = {
 [RPMHPD_CX] = &cx_w_mx_parent,
 [RPMHPD_CX_AO] = &cx_ao_w_mx_parent,
 [RPMHPD_GFX] = &gfx,
 [RPMHPD_LCX] = &lcx,
 [RPMHPD_LMX] = &lmx,
 [RPMHPD_MX] = &mx,
 [RPMHPD_MX_AO] = &mx_ao,
 [RPMHPD_MSS] = &mss,
};

static const struct rpmhpd_desc sm7150_desc = {
 .rpmhpds = sm7150_rpmhpds,
 .num_pds = ARRAY_SIZE(sm7150_rpmhpds),
};

/* SM8150 RPMH powerdomains */
static struct rpmhpd *sm8150_rpmhpds[] = {
 [SM8150_CX] = &cx_w_mx_parent,
 [SM8150_CX_AO] = &cx_ao_w_mx_parent,
 [SM8150_EBI] = &ebi,
 [SM8150_GFX] = &gfx,
 [SM8150_LCX] = &lcx,
 [SM8150_LMX] = &lmx,
 [SM8150_MMCX] = &mmcx,
 [SM8150_MMCX_AO] = &mmcx_ao,
 [SM8150_MSS] = &mss,
 [SM8150_MX] = &mx,
 [SM8150_MX_AO] = &mx_ao,
};

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

static struct rpmhpd *sa8155p_rpmhpds[] = {
 [SA8155P_CX] = &cx_w_mx_parent,
 [SA8155P_CX_AO] = &cx_ao_w_mx_parent,
 [SA8155P_EBI] = &ebi,
 [SA8155P_GFX] = &gfx,
 [SA8155P_MSS] = &mss,
 [SA8155P_MX] = &mx,
 [SA8155P_MX_AO] = &mx_ao,
};

static const struct rpmhpd_desc sa8155p_desc = {
 .rpmhpds = sa8155p_rpmhpds,
 .num_pds = ARRAY_SIZE(sa8155p_rpmhpds),
};

/* SM8250 RPMH powerdomains */
static struct rpmhpd *sm8250_rpmhpds[] = {
 [RPMHPD_CX] = &cx_w_mx_parent,
 [RPMHPD_CX_AO] = &cx_ao_w_mx_parent,
 [RPMHPD_EBI] = &ebi,
 [RPMHPD_GFX] = &gfx,
 [RPMHPD_LCX] = &lcx,
 [RPMHPD_LMX] = &lmx,
 [RPMHPD_MMCX] = &mmcx,
 [RPMHPD_MMCX_AO] = &mmcx_ao,
 [RPMHPD_MX] = &mx,
 [RPMHPD_MX_AO] = &mx_ao,
};

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

/* SM8350 Power domains */
static struct rpmhpd *sm8350_rpmhpds[] = {
 [RPMHPD_CX] = &cx_w_mx_parent,
 [RPMHPD_CX_AO] = &cx_ao_w_mx_parent,
 [RPMHPD_EBI] = &ebi,
 [RPMHPD_GFX] = &gfx,
 [RPMHPD_LCX] = &lcx,
 [RPMHPD_LMX] = &lmx,
 [RPMHPD_MMCX] = &mmcx,
 [RPMHPD_MMCX_AO] = &mmcx_ao,
 [RPMHPD_MSS] = &mss,
 [RPMHPD_MX] = &mx,
 [RPMHPD_MX_AO] = &mx_ao,
 [RPMHPD_MXC] = &mxc,
 [RPMHPD_MXC_AO] = &mxc_ao,
};

static const struct rpmhpd_desc sm8350_desc = {
 .rpmhpds = sm8350_rpmhpds,
 .num_pds = ARRAY_SIZE(sm8350_rpmhpds),
};

/* SM8450 RPMH powerdomains */
static struct rpmhpd *sm8450_rpmhpds[] = {
 [RPMHPD_CX] = &cx,
 [RPMHPD_CX_AO] = &cx_ao,
 [RPMHPD_EBI] = &ebi,
 [RPMHPD_GFX] = &gfx,
 [RPMHPD_LCX] = &lcx,
 [RPMHPD_LMX] = &lmx,
 [RPMHPD_MMCX] = &mmcx_w_cx_parent,
 [RPMHPD_MMCX_AO] = &mmcx_ao_w_cx_parent,
 [RPMHPD_MSS] = &mss,
 [RPMHPD_MX] = &mx,
 [RPMHPD_MX_AO] = &mx_ao,
 [RPMHPD_MXC] = &mxc,
 [RPMHPD_MXC_AO] = &mxc_ao,
};

static const struct rpmhpd_desc sm8450_desc = {
 .rpmhpds = sm8450_rpmhpds,
 .num_pds = ARRAY_SIZE(sm8450_rpmhpds),
};

/* SM8550 RPMH powerdomains */
static struct rpmhpd *sm8550_rpmhpds[] = {
 [RPMHPD_CX] = &cx,
 [RPMHPD_CX_AO] = &cx_ao,
 [RPMHPD_EBI] = &ebi,
 [RPMHPD_GFX] = &gfx,
 [RPMHPD_LCX] = &lcx,
 [RPMHPD_LMX] = &lmx,
 [RPMHPD_MMCX] = &mmcx_w_cx_parent,
 [RPMHPD_MMCX_AO] = &mmcx_ao_w_cx_parent,
 [RPMHPD_MSS] = &mss,
 [RPMHPD_MX] = &mx,
 [RPMHPD_MX_AO] = &mx_ao,
 [RPMHPD_MXC] = &mxc,
 [RPMHPD_MXC_AO] = &mxc_ao,
 [RPMHPD_NSP] = &nsp,
};

static const struct rpmhpd_desc sm8550_desc = {
 .rpmhpds = sm8550_rpmhpds,
 .num_pds = ARRAY_SIZE(sm8550_rpmhpds),
};

/* SM8650 RPMH powerdomains */
static struct rpmhpd *sm8650_rpmhpds[] = {
 [RPMHPD_CX] = &cx,
 [RPMHPD_CX_AO] = &cx_ao,
 [RPMHPD_EBI] = &ebi,
 [RPMHPD_GFX] = &gfx,
 [RPMHPD_LCX] = &lcx,
 [RPMHPD_LMX] = &lmx,
 [RPMHPD_MMCX] = &mmcx_w_cx_parent,
 [RPMHPD_MMCX_AO] = &mmcx_ao_w_cx_parent,
 [RPMHPD_MSS] = &mss,
 [RPMHPD_MX] = &mx,
 [RPMHPD_MX_AO] = &mx_ao,
 [RPMHPD_MXC] = &mxc,
 [RPMHPD_MXC_AO] = &mxc_ao,
 [RPMHPD_NSP] = &nsp,
 [RPMHPD_NSP2] = &nsp2,
};

static const struct rpmhpd_desc sm8650_desc = {
 .rpmhpds = sm8650_rpmhpds,
 .num_pds = ARRAY_SIZE(sm8650_rpmhpds),
};

/* SM8750 RPMH powerdomains */
static struct rpmhpd *sm8750_rpmhpds[] = {
 [RPMHPD_CX] = &cx,
 [RPMHPD_CX_AO] = &cx_ao,
 [RPMHPD_EBI] = &ebi,
 [RPMHPD_GFX] = &gfx,
 [RPMHPD_GMXC] = &gmxc,
 [RPMHPD_LCX] = &lcx,
 [RPMHPD_LMX] = &lmx,
 [RPMHPD_MX] = &mx,
 [RPMHPD_MX_AO] = &mx_ao,
 [RPMHPD_MMCX] = &mmcx_w_cx_parent,
 [RPMHPD_MMCX_AO] = &mmcx_ao_w_cx_parent,
 [RPMHPD_MSS] = &mss,
 [RPMHPD_MXC] = &mxc,
 [RPMHPD_MXC_AO] = &mxc_ao,
 [RPMHPD_NSP] = &nsp,
 [RPMHPD_NSP2] = &nsp2,
};

static const struct rpmhpd_desc sm8750_desc = {
 .rpmhpds = sm8750_rpmhpds,
 .num_pds = ARRAY_SIZE(sm8750_rpmhpds),
};

/* QDU1000/QRU1000 RPMH powerdomains */
static struct rpmhpd *qdu1000_rpmhpds[] = {
 [QDU1000_CX] = &cx,
 [QDU1000_EBI] = &ebi,
 [QDU1000_MSS] = &mss,
 [QDU1000_MX] = &mx,
};

static const struct rpmhpd_desc qdu1000_desc = {
 .rpmhpds = qdu1000_rpmhpds,
 .num_pds = ARRAY_SIZE(qdu1000_rpmhpds),
};

/* SC7180 RPMH powerdomains */
static struct rpmhpd *sc7180_rpmhpds[] = {
 [SC7180_CX] = &cx_w_mx_parent,
 [SC7180_CX_AO] = &cx_ao_w_mx_parent,
 [SC7180_GFX] = &gfx,
 [SC7180_LCX] = &lcx,
 [SC7180_LMX] = &lmx,
 [SC7180_MSS] = &mss,
 [SC7180_MX] = &mx,
 [SC7180_MX_AO] = &mx_ao,
};

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

/* SC7280 RPMH powerdomains */
static struct rpmhpd *sc7280_rpmhpds[] = {
 [SC7280_CX] = &cx,
 [SC7280_CX_AO] = &cx_ao,
 [SC7280_EBI] = &ebi,
 [SC7280_GFX] = &gfx,
 [SC7280_LCX] = &lcx,
 [SC7280_LMX] = &lmx,
 [SC7280_MSS] = &mss,
 [SC7280_MX] = &mx,
 [SC7280_MX_AO] = &mx_ao,
};

static const struct rpmhpd_desc sc7280_desc = {
 .rpmhpds = sc7280_rpmhpds,
 .num_pds = ARRAY_SIZE(sc7280_rpmhpds),
};

/* SC8180x RPMH powerdomains */
static struct rpmhpd *sc8180x_rpmhpds[] = {
 [SC8180X_CX] = &cx_w_mx_parent,
 [SC8180X_CX_AO] = &cx_ao_w_mx_parent,
 [SC8180X_EBI] = &ebi,
 [SC8180X_GFX] = &gfx,
 [SC8180X_LCX] = &lcx,
 [SC8180X_LMX] = &lmx,
 [SC8180X_MMCX] = &mmcx,
 [SC8180X_MMCX_AO] = &mmcx_ao,
 [SC8180X_MSS] = &mss,
 [SC8180X_MX] = &mx,
 [SC8180X_MX_AO] = &mx_ao,
};

static const struct rpmhpd_desc sc8180x_desc = {
 .rpmhpds = sc8180x_rpmhpds,
 .num_pds = ARRAY_SIZE(sc8180x_rpmhpds),
};

/* SC8280xp RPMH powerdomains */
static struct rpmhpd *sc8280xp_rpmhpds[] = {
 [SC8280XP_CX] = &cx,
 [SC8280XP_CX_AO] = &cx_ao,
 [SC8280XP_EBI] = &ebi,
 [SC8280XP_GFX] = &gfx,
 [SC8280XP_LCX] = &lcx,
 [SC8280XP_LMX] = &lmx,
 [SC8280XP_MMCX] = &mmcx,
 [SC8280XP_MMCX_AO] = &mmcx_ao,
 [SC8280XP_MX] = &mx,
 [SC8280XP_MX_AO] = &mx_ao,
 [SC8280XP_NSP] = &nsp,
 [SC8280XP_QPHY] = &qphy,
};

static const struct rpmhpd_desc sc8280xp_desc = {
 .rpmhpds = sc8280xp_rpmhpds,
 .num_pds = ARRAY_SIZE(sc8280xp_rpmhpds),
};

/* Glymur RPMH powerdomains */
static struct rpmhpd *glymur_rpmhpds[] = {
 [RPMHPD_CX] = &cx,
 [RPMHPD_CX_AO] = &cx_ao,
 [RPMHPD_EBI] = &ebi,
 [RPMHPD_GFX] = &gfx,
 [RPMHPD_LCX] = &lcx,
 [RPMHPD_LMX] = &lmx,
 [RPMHPD_MMCX] = &mmcx,
 [RPMHPD_MMCX_AO] = &mmcx_ao,
 [RPMHPD_MX] = &mx,
 [RPMHPD_MX_AO] = &mx_ao,
 [RPMHPD_MXC] = &mxc,
 [RPMHPD_MXC_AO] = &mxc_ao,
 [RPMHPD_MSS] = &mss,
 [RPMHPD_NSP] = &nsp,
 [RPMHPD_NSP2] = &nsp2,
 [RPMHPD_GMXC] = &gmxc,
};

static const struct rpmhpd_desc glymur_desc = {
 .rpmhpds = glymur_rpmhpds,
 .num_pds = ARRAY_SIZE(glymur_rpmhpds),
};

/* X1E80100 RPMH powerdomains */
static struct rpmhpd *x1e80100_rpmhpds[] = {
 [RPMHPD_CX] = &cx,
 [RPMHPD_CX_AO] = &cx_ao,
 [RPMHPD_EBI] = &ebi,
 [RPMHPD_GFX] = &gfx,
 [RPMHPD_LCX] = &lcx,
 [RPMHPD_LMX] = &lmx,
 [RPMHPD_MMCX] = &mmcx,
 [RPMHPD_MMCX_AO] = &mmcx_ao,
 [RPMHPD_MX] = &mx,
 [RPMHPD_MX_AO] = &mx_ao,
 [RPMHPD_NSP] = &nsp,
 [RPMHPD_MXC] = &mxc,
 [RPMHPD_GMXC] = &gmxc,
};

static const struct rpmhpd_desc x1e80100_desc = {
 .rpmhpds = x1e80100_rpmhpds,
 .num_pds = ARRAY_SIZE(x1e80100_rpmhpds),
};

/* QCS8300 RPMH power domains */
static struct rpmhpd *qcs8300_rpmhpds[] = {
 [RPMHPD_CX] = &cx,
 [RPMHPD_CX_AO] = &cx_ao,
 [RPMHPD_EBI] = &ebi,
 [RPMHPD_GFX] = &gfx,
 [RPMHPD_LCX] = &lcx,
 [RPMHPD_LMX] = &lmx,
 [RPMHPD_MMCX] = &mmcx_w_cx_parent,
 [RPMHPD_MMCX_AO] = &mmcx_ao_w_cx_parent,
 [RPMHPD_MXC] = &mxc,
 [RPMHPD_MXC_AO] = &mxc_ao,
 [RPMHPD_MX] = &mx,
 [RPMHPD_MX_AO] = &mx_ao,
 [RPMHPD_NSP0] = &nsp0,
 [RPMHPD_NSP1] = &nsp1,
};

static const struct rpmhpd_desc qcs8300_desc = {
 .rpmhpds = qcs8300_rpmhpds,
 .num_pds = ARRAY_SIZE(qcs8300_rpmhpds),
};

/* QCS615 RPMH powerdomains */
static struct rpmhpd *qcs615_rpmhpds[] = {
 [RPMHPD_CX] = &cx,
 [RPMHPD_CX_AO] = &cx_ao,
};

static const struct rpmhpd_desc qcs615_desc = {
 .rpmhpds = qcs615_rpmhpds,
 .num_pds = ARRAY_SIZE(qcs615_rpmhpds),
};

static const struct of_device_id rpmhpd_match_table[] = {
 { .compatible = "qcom,glymur-rpmhpd", .data = &glymur_desc },
 { .compatible = "qcom,milos-rpmhpd", .data = &milos_desc },
 { .compatible = "qcom,qcs615-rpmhpd", .data = &qcs615_desc },
 { .compatible = "qcom,qcs8300-rpmhpd", .data = &qcs8300_desc },
 { .compatible = "qcom,qdu1000-rpmhpd", .data = &qdu1000_desc },
 { .compatible = "qcom,sa8155p-rpmhpd", .data = &sa8155p_desc },
 { .compatible = "qcom,sa8540p-rpmhpd", .data = &sa8540p_desc },
 { .compatible = "qcom,sa8775p-rpmhpd", .data = &sa8775p_desc },
 { .compatible = "qcom,sar2130p-rpmhpd", .data = &sar2130p_desc},
 { .compatible = "qcom,sc7180-rpmhpd", .data = &sc7180_desc },
 { .compatible = "qcom,sc7280-rpmhpd", .data = &sc7280_desc },
 { .compatible = "qcom,sc8180x-rpmhpd", .data = &sc8180x_desc },
 { .compatible = "qcom,sc8280xp-rpmhpd", .data = &sc8280xp_desc },
 { .compatible = "qcom,sdm670-rpmhpd", .data = &sdm670_desc },
 { .compatible = "qcom,sdm845-rpmhpd", .data = &sdm845_desc },
 { .compatible = "qcom,sdx55-rpmhpd", .data = &sdx55_desc},
 { .compatible = "qcom,sdx65-rpmhpd", .data = &sdx65_desc},
 { .compatible = "qcom,sdx75-rpmhpd", .data = &sdx75_desc},
 { .compatible = "qcom,sm4450-rpmhpd", .data = &sm4450_desc },
 { .compatible = "qcom,sm6350-rpmhpd", .data = &sm6350_desc },
 { .compatible = "qcom,sm7150-rpmhpd", .data = &sm7150_desc },
 { .compatible = "qcom,sm8150-rpmhpd", .data = &sm8150_desc },
 { .compatible = "qcom,sm8250-rpmhpd", .data = &sm8250_desc },
 { .compatible = "qcom,sm8350-rpmhpd", .data = &sm8350_desc },
 { .compatible = "qcom,sm8450-rpmhpd", .data = &sm8450_desc },
 { .compatible = "qcom,sm8550-rpmhpd", .data = &sm8550_desc },
 { .compatible = "qcom,sm8650-rpmhpd", .data = &sm8650_desc },
 { .compatible = "qcom,sm8750-rpmhpd", .data = &sm8750_desc },
 { .compatible = "qcom,x1e80100-rpmhpd", .data = &x1e80100_desc },
 { }
};
MODULE_DEVICE_TABLE(of, rpmhpd_match_table);

static int rpmhpd_send_corner(struct rpmhpd *pd, int state,
         unsigned int corner, bool sync)
{
 struct tcs_cmd cmd = {
  .addr = pd->addr,
  .data = corner,
 };

 /*
 * Wait for an ack only when we are increasing the
 * perf state of the power domain
 */
 if (sync)
  return rpmh_write(pd->dev, state, &cmd, 1);
 else
  return rpmh_write_async(pd->dev, state, &cmd, 1);
}

static void to_active_sleep(struct rpmhpd *pd, unsigned int corner,
       unsigned int *active, unsigned int *sleep)
{
 *active = corner;

 if (pd->active_only)
  *sleep = 0;
 else
  *sleep = *active;
}

/*
 * This function is used to aggregate the votes across the active only
 * resources and its peers. The aggregated votes are sent to RPMh as
 * ACTIVE_ONLY votes (which take effect immediately), as WAKE_ONLY votes
 * (applied by RPMh on system wakeup) and as SLEEP votes (applied by RPMh
 * on system sleep).
 * We send ACTIVE_ONLY votes for resources without any peers. For others,
 * which have an active only peer, all 3 votes are sent.
 */
static int rpmhpd_aggregate_corner(struct rpmhpd *pd, unsigned int corner)
{
 int ret;
 struct rpmhpd *peer = pd->peer;
 unsigned int active_corner, sleep_corner;
 unsigned int this_active_corner = 0, this_sleep_corner = 0;
 unsigned int peer_active_corner = 0, peer_sleep_corner = 0;
 unsigned int peer_enabled_corner;

 if (pd->state_synced) {
  to_active_sleep(pd, corner, &this_active_corner, &this_sleep_corner);
 } else {
  /* Clamp to highest corner if sync_state hasn't happened */
  this_active_corner = pd->level_count - 1;
  this_sleep_corner = pd->level_count - 1;
 }

 if (peer && peer->enabled) {
  peer_enabled_corner = max(peer->corner, peer->enable_corner);
  to_active_sleep(peer, peer_enabled_corner, &peer_active_corner,
    &peer_sleep_corner);
 }

 active_corner = max(this_active_corner, peer_active_corner);

 ret = rpmhpd_send_corner(pd, RPMH_ACTIVE_ONLY_STATE, active_corner,
     active_corner > pd->active_corner);
 if (ret)
  return ret;

 pd->active_corner = active_corner;

 if (peer) {
  peer->active_corner = active_corner;

  ret = rpmhpd_send_corner(pd, RPMH_WAKE_ONLY_STATE,
      active_corner, false);
  if (ret)
   return ret;

  sleep_corner = max(this_sleep_corner, peer_sleep_corner);

  return rpmhpd_send_corner(pd, RPMH_SLEEP_STATE, sleep_corner,
       false);
 }

 return ret;
}

static int rpmhpd_power_on(struct generic_pm_domain *domain)
{
 struct rpmhpd *pd = domain_to_rpmhpd(domain);
 unsigned int corner;
 int ret;

 mutex_lock(&rpmhpd_lock);

 corner = max(pd->corner, pd->enable_corner);
 ret = rpmhpd_aggregate_corner(pd, corner);
 if (!ret)
  pd->enabled = true;

 mutex_unlock(&rpmhpd_lock);

 return ret;
}

static int rpmhpd_power_off(struct generic_pm_domain *domain)
{
 struct rpmhpd *pd = domain_to_rpmhpd(domain);
 int ret;

 mutex_lock(&rpmhpd_lock);

 ret = rpmhpd_aggregate_corner(pd, 0);
 if (!ret)
  pd->enabled = false;

 mutex_unlock(&rpmhpd_lock);

 return ret;
}

static int rpmhpd_set_performance_state(struct generic_pm_domain *domain,
     unsigned int level)
{
 struct rpmhpd *pd = domain_to_rpmhpd(domain);
 int ret, i;

 guard(mutex)(&rpmhpd_lock);

 for (i = 0; i < pd->level_count; i++)
  if (level <= pd->level[i])
   break;

 /*
 * If the level requested is more than that supported by the
 * max corner, just set it to max anyway.
 */
 if (i == pd->level_count)
  i--;

 if (pd->enabled) {
  /* Ensure that the domain isn't turn off */
  if (i < pd->enable_corner)
   i = pd->enable_corner;

  ret = rpmhpd_aggregate_corner(pd, i);
  if (ret)
   return ret;
 }

 pd->corner = i;

 return 0;
}

static int rpmhpd_update_level_mapping(struct rpmhpd *rpmhpd)
{
 int i;
 const u16 *buf;

 buf = cmd_db_read_aux_data(rpmhpd->res_name, &rpmhpd->level_count);
 if (IS_ERR(buf))
  return PTR_ERR(buf);

 /* 2 bytes used for each command DB aux data entry */
 rpmhpd->level_count >>= 1;

 if (rpmhpd->level_count > RPMH_ARC_MAX_LEVELS)
  return -EINVAL;

 for (i = 0; i < rpmhpd->level_count; i++) {
  if (rpmhpd->skip_retention_level && buf[i] == RPMH_REGULATOR_LEVEL_RETENTION)
   continue;

  rpmhpd->level[i] = buf[i];

  /* Remember the first corner with non-zero level */
  if (!rpmhpd->level[rpmhpd->enable_corner] && rpmhpd->level[i])
   rpmhpd->enable_corner = i;

  /*
 * The AUX data may be zero padded.  These 0 valued entries at
 * the end of the map must be ignored.
 */
  if (i > 0 && rpmhpd->level[i] == 0) {
   rpmhpd->level_count = i;
   break;
  }
  pr_debug("%s: ARC hlvl=%2d --> vlvl=%4u\n", rpmhpd->res_name, i,
    rpmhpd->level[i]);
 }

 return 0;
}

static int rpmhpd_probe(struct platform_device *pdev)
{
 int i, ret;
 size_t num_pds;
 struct device *dev = &pdev->dev;
 struct genpd_onecell_data *data;
 struct rpmhpd **rpmhpds;
 const struct rpmhpd_desc *desc;

 desc = of_device_get_match_data(dev);
 if (!desc)
  return -EINVAL;

 rpmhpds = desc->rpmhpds;
 num_pds = desc->num_pds;

 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 if (!data)
  return -ENOMEM;

 data->domains = devm_kcalloc(dev, num_pds, sizeof(*data->domains),
         GFP_KERNEL);
 if (!data->domains)
  return -ENOMEM;

 data->num_domains = num_pds;

 for (i = 0; i < num_pds; i++) {
  if (!rpmhpds[i])
   continue;

  rpmhpds[i]->dev = dev;
  rpmhpds[i]->addr = cmd_db_read_addr(rpmhpds[i]->res_name);
  if (!rpmhpds[i]->addr) {
   dev_err(dev, "Could not find RPMh address for resource %s\n",
    rpmhpds[i]->res_name);
   return -ENODEV;
  }

  ret = cmd_db_read_slave_id(rpmhpds[i]->res_name);
  if (ret != CMD_DB_HW_ARC) {
   dev_err(dev, "RPMh slave ID mismatch\n");
   return -EINVAL;
  }

  ret = rpmhpd_update_level_mapping(rpmhpds[i]);
  if (ret)
   return ret;

  rpmhpds[i]->pd.power_off = rpmhpd_power_off;
  rpmhpds[i]->pd.power_on = rpmhpd_power_on;
  rpmhpds[i]->pd.set_performance_state = rpmhpd_set_performance_state;
  pm_genpd_init(&rpmhpds[i]->pd, NULL, true);

  data->domains[i] = &rpmhpds[i]->pd;
 }

 /* Add subdomains */
 for (i = 0; i < num_pds; i++) {
  if (!rpmhpds[i])
   continue;
  if (rpmhpds[i]->parent)
   pm_genpd_add_subdomain(rpmhpds[i]->parent,
            &rpmhpds[i]->pd);
 }

 return of_genpd_add_provider_onecell(pdev->dev.of_node, data);
}

static void rpmhpd_sync_state(struct device *dev)
{
 const struct rpmhpd_desc *desc = of_device_get_match_data(dev);
 struct rpmhpd **rpmhpds = desc->rpmhpds;
 unsigned int corner;
 struct rpmhpd *pd;
 unsigned int i;
 int ret;

 of_genpd_sync_state(dev->of_node);

 mutex_lock(&rpmhpd_lock);
 for (i = 0; i < desc->num_pds; i++) {
  pd = rpmhpds[i];
  if (!pd)
   continue;

  pd->state_synced = true;
  if (pd->enabled)
   corner = max(pd->corner, pd->enable_corner);
  else
   corner = 0;

  ret = rpmhpd_aggregate_corner(pd, corner);
  if (ret)
   dev_err(dev, "failed to sync %s\n", pd->res_name);
 }
 mutex_unlock(&rpmhpd_lock);
}

static struct platform_driver rpmhpd_driver = {
 .driver = {
  .name = "qcom-rpmhpd",
  .of_match_table = rpmhpd_match_table,
  .suppress_bind_attrs = true,
  .sync_state = rpmhpd_sync_state,
 },
 .probe = rpmhpd_probe,
};

static int __init rpmhpd_init(void)
{
 return platform_driver_register(&rpmhpd_driver);
}
core_initcall(rpmhpd_init);

MODULE_DESCRIPTION("Qualcomm Technologies, Inc. RPMh Power Domain Driver");
MODULE_LICENSE("GPL v2");