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path: root/drivers/genpd/qcom/rpmhpd.c
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Diffstat (limited to 'drivers/genpd/qcom/rpmhpd.c')
-rw-r--r--drivers/genpd/qcom/rpmhpd.c886
1 files changed, 886 insertions, 0 deletions
diff --git a/drivers/genpd/qcom/rpmhpd.c b/drivers/genpd/qcom/rpmhpd.c
new file mode 100644
index 000000000000..a87e336d5e33
--- /dev/null
+++ b/drivers/genpd/qcom/rpmhpd.c
@@ -0,0 +1,886 @@
+// 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/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
+ */
+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;
+};
+
+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",
+};
+
+static struct rpmhpd mxc_ao = {
+ .pd = { .name = "mxc_ao", },
+ .active_only = true,
+ .peer = &mxc,
+ .res_name = "mxc.lvl",
+};
+
+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 qphy = {
+ .pd = { .name = "qphy", },
+ .res_name = "qphy.lvl",
+};
+
+/* SA8540P RPMH powerdomains */
+static struct rpmhpd *sa8540p_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,
+};
+
+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),
+};
+
+/* 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),
+};
+
+/* 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),
+};
+
+/* 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),
+};
+
+/* 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),
+};
+
+static const struct of_device_id rpmhpd_match_table[] = {
+ { .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,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,sm6350-rpmhpd", .data = &sm6350_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 },
+ { }
+};
+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;
+
+ 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)
+ to_active_sleep(peer, peer->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 = 0, i;
+
+ mutex_lock(&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)
+ goto out;
+ }
+
+ pd->corner = i;
+out:
+ mutex_unlock(&rpmhpd_lock);
+
+ return ret;
+}
+
+static unsigned int rpmhpd_get_performance_state(struct generic_pm_domain *genpd,
+ struct dev_pm_opp *opp)
+{
+ return dev_pm_opp_get_level(opp);
+}
+
+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++) {
+ 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;
+ rpmhpds[i]->pd.opp_to_performance_state = rpmhpd_get_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;
+
+ 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");