/*
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* Rockchip CPUFreq Driver
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*
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* Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/clk.h>
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#include <linux/cpu.h>
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#include <linux/cpufreq.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/nvmem-consumer.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/pm_opp.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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#include <linux/soc/rockchip/pvtm.h>
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#include <linux/thermal.h>
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#include <linux/rockchip/cpu.h>
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#include <soc/rockchip/rockchip_opp_select.h>
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#include <soc/rockchip/rockchip_system_monitor.h>
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#include "cpufreq-dt.h"
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#include "rockchip-cpufreq.h"
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#include "../clk/rockchip/clk.h"
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#define LEAKAGE_INVALID 0xff
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struct cluster_info {
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struct opp_table *opp_table;
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struct list_head list_head;
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cpumask_t cpus;
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unsigned int reboot_freq;
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unsigned int threshold_freq;
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unsigned int scale_rate;
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unsigned int temp_limit_rate;
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int volt_sel;
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int scale;
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int process;
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bool offline;
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bool freq_limit;
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bool is_check_init;
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};
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static LIST_HEAD(cluster_info_list);
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static __maybe_unused int px30_get_soc_info(struct device *dev,
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struct device_node *np,
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int *bin, int *process)
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{
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int ret = 0;
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u8 value = 0;
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if (!bin)
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return 0;
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if (of_property_match_string(np, "nvmem-cell-names",
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"performance") >= 0) {
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ret = rockchip_nvmem_cell_read_u8(np, "performance", &value);
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if (ret) {
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dev_err(dev, "Failed to get soc performance value\n");
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return ret;
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}
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*bin = value;
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}
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if (*bin >= 0)
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dev_info(dev, "bin=%d\n", *bin);
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return ret;
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}
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static __maybe_unused int rk3288_get_soc_info(struct device *dev,
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struct device_node *np,
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int *bin, int *process)
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{
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int ret = 0;
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u8 value = 0;
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char *name;
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if (!bin)
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goto next;
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if (of_property_match_string(np, "nvmem-cell-names", "special") >= 0) {
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ret = rockchip_nvmem_cell_read_u8(np, "special", &value);
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if (ret) {
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dev_err(dev, "Failed to get soc special value\n");
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goto out;
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}
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if (value == 0xc)
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*bin = 0;
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else
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*bin = 1;
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}
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if (soc_is_rk3288w())
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name = "performance-w";
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else
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name = "performance";
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if (of_property_match_string(np, "nvmem-cell-names", name) >= 0) {
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ret = rockchip_nvmem_cell_read_u8(np, name, &value);
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if (ret) {
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dev_err(dev, "Failed to get soc performance value\n");
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goto out;
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}
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if (value & 0x2)
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*bin = 3;
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else if (value & 0x01)
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*bin = 2;
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}
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if (*bin >= 0)
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dev_info(dev, "bin=%d\n", *bin);
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next:
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if (!process)
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goto out;
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if (of_property_match_string(np, "nvmem-cell-names",
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"process") >= 0) {
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ret = rockchip_nvmem_cell_read_u8(np, "process", &value);
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if (ret) {
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dev_err(dev, "Failed to get soc process version\n");
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goto out;
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}
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if (soc_is_rk3288() && (value == 0 || value == 1))
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*process = 0;
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}
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if (*process >= 0)
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dev_info(dev, "process=%d\n", *process);
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out:
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return ret;
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}
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static __maybe_unused int rk3399_get_soc_info(struct device *dev,
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struct device_node *np,
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int *bin, int *process)
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{
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int ret = 0;
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u8 value = 0;
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if (!bin)
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return 0;
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if (of_property_match_string(np, "nvmem-cell-names",
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"specification_serial_number") >= 0) {
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ret = rockchip_nvmem_cell_read_u8(np,
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"specification_serial_number",
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&value);
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if (ret) {
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dev_err(dev,
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"Failed to get specification_serial_number\n");
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goto out;
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}
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if (value == 0xb) {
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*bin = 0;
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} else if (value == 0x1) {
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if (of_property_match_string(np, "nvmem-cell-names",
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"customer_demand") >= 0) {
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ret = rockchip_nvmem_cell_read_u8(np,
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"customer_demand",
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&value);
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if (ret) {
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dev_err(dev, "Failed to get customer_demand\n");
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goto out;
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}
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if (value == 0x0)
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*bin = 0;
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else
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*bin = 1;
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}
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} else if (value == 0x10) {
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*bin = 1;
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}
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}
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out:
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if (*bin >= 0)
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dev_info(dev, "bin=%d\n", *bin);
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return ret;
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}
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static __maybe_unused int rv1126_get_soc_info(struct device *dev,
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struct device_node *np,
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int *bin, int *process)
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{
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int ret = 0;
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u8 value = 0;
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if (of_property_match_string(np, "nvmem-cell-names", "performance") >= 0) {
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ret = rockchip_nvmem_cell_read_u8(np, "performance", &value);
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if (ret) {
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dev_err(dev, "Failed to get soc performance value\n");
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return ret;
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}
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if (value == 0x1)
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*bin = 1;
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else
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*bin = 0;
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}
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if (*bin >= 0)
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dev_info(dev, "bin=%d\n", *bin);
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return ret;
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}
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static const struct of_device_id rockchip_cpufreq_of_match[] = {
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#ifdef CONFIG_CPU_PX30
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{
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.compatible = "rockchip,px30",
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.data = (void *)&px30_get_soc_info,
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},
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#endif
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#ifdef CONFIG_CPU_RK3288
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{
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.compatible = "rockchip,rk3288",
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.data = (void *)&rk3288_get_soc_info,
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},
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{
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.compatible = "rockchip,rk3288w",
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.data = (void *)&rk3288_get_soc_info,
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},
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#endif
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#ifdef CONFIG_CPU_PX30
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{
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.compatible = "rockchip,rk3326",
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.data = (void *)&px30_get_soc_info,
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},
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#endif
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#ifdef CONFIG_CPU_RK3399
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{
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.compatible = "rockchip,rk3399",
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.data = (void *)&rk3399_get_soc_info,
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},
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#endif
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#ifdef CONFIG_CPU_RV1126
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{
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.compatible = "rockchip,rv1109",
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.data = (void *)&rv1126_get_soc_info,
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},
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{
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.compatible = "rockchip,rv1126",
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.data = (void *)&rv1126_get_soc_info,
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},
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#endif
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{},
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};
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static struct cluster_info *rockchip_cluster_info_lookup(int cpu)
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{
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struct cluster_info *cluster;
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list_for_each_entry(cluster, &cluster_info_list, list_head) {
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if (cpumask_test_cpu(cpu, &cluster->cpus))
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return cluster;
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}
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return NULL;
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}
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static struct cluster_info *rockchip_cluster_lookup_by_dev(struct device *dev)
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{
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struct cluster_info *cluster;
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struct device *cpu_dev;
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int cpu;
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list_for_each_entry(cluster, &cluster_info_list, list_head) {
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for_each_cpu(cpu, &cluster->cpus) {
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cpu_dev = get_cpu_device(cpu);
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if (!cpu_dev)
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continue;
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if (cpu_dev == dev)
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return cluster;
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}
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}
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return NULL;
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}
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static int rockchip_cpufreq_cluster_init(int cpu, struct cluster_info *cluster)
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{
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struct device_node *np;
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struct property *pp;
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struct device *dev;
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char *reg_name = NULL;
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int ret = 0, bin = -EINVAL;
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cluster->process = -EINVAL;
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cluster->volt_sel = -EINVAL;
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cluster->scale = 0;
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dev = get_cpu_device(cpu);
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if (!dev)
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return -ENODEV;
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pp = of_find_property(dev->of_node, "cpu-supply", NULL);
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if (pp) {
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reg_name = "cpu";
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} else {
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pp = of_find_property(dev->of_node, "cpu0-supply", NULL);
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if (pp)
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reg_name = "cpu0";
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else
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return -ENOENT;
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}
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np = of_parse_phandle(dev->of_node, "operating-points-v2", 0);
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if (!np) {
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dev_warn(dev, "OPP-v2 not supported\n");
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return -ENOENT;
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}
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ret = dev_pm_opp_of_get_sharing_cpus(dev, &cluster->cpus);
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if (ret) {
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dev_err(dev, "Failed to get sharing cpus\n");
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goto np_err;
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}
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of_property_read_u32(np, "rockchip,threshold-freq",
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&cluster->threshold_freq);
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cluster->freq_limit = of_property_read_bool(np, "rockchip,freq-limit");
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rockchip_get_soc_info(dev, rockchip_cpufreq_of_match,
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&bin, &cluster->process);
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rockchip_get_scale_volt_sel(dev, "cpu_leakage", reg_name,
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bin, cluster->process,
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&cluster->scale, &cluster->volt_sel);
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np_err:
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of_node_put(np);
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return ret;
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}
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int rockchip_cpufreq_check_rate_volt(struct device *dev)
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{
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struct cluster_info *cluster;
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cluster = rockchip_cluster_lookup_by_dev(dev);
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if (!cluster)
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return -EINVAL;
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if (cluster->is_check_init)
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return 0;
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dev_pm_opp_check_rate_volt(dev, true);
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cluster->is_check_init = true;
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return 0;
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}
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EXPORT_SYMBOL_GPL(rockchip_cpufreq_check_rate_volt);
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int rockchip_cpufreq_set_opp_info(struct device *dev)
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{
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struct cluster_info *cluster;
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cluster = rockchip_cluster_lookup_by_dev(dev);
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if (!cluster)
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return -EINVAL;
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cluster->opp_table = rockchip_set_opp_prop_name(dev,
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cluster->process,
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cluster->volt_sel);
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if (IS_ERR(cluster->opp_table)) {
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dev_err(dev, "Failed to set prop name\n");
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return PTR_ERR(cluster->opp_table);
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(rockchip_cpufreq_set_opp_info);
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void rockchip_cpufreq_put_opp_info(struct device *dev)
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{
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struct cluster_info *cluster;
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cluster = rockchip_cluster_lookup_by_dev(dev);
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if (!cluster)
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return;
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if (!IS_ERR_OR_NULL(cluster->opp_table))
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dev_pm_opp_put_prop_name(cluster->opp_table);
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}
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EXPORT_SYMBOL_GPL(rockchip_cpufreq_put_opp_info);
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int rockchip_cpufreq_adjust_power_scale(struct device *dev)
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{
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struct cluster_info *cluster;
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cluster = rockchip_cluster_lookup_by_dev(dev);
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if (!cluster)
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return -EINVAL;
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rockchip_adjust_power_scale(dev, cluster->scale);
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return 0;
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}
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EXPORT_SYMBOL_GPL(rockchip_cpufreq_adjust_power_scale);
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int rockchip_cpufreq_suspend(struct cpufreq_policy *policy)
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{
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int ret = 0;
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ret = cpufreq_generic_suspend(policy);
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if (!ret)
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rockchip_monitor_suspend_low_temp_adjust(policy->cpu);
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return ret;
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}
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EXPORT_SYMBOL_GPL(rockchip_cpufreq_suspend);
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static struct cpufreq_policy *rockchip_get_policy(struct cluster_info *cluster)
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{
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int first_cpu;
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first_cpu = cpumask_first_and(&cluster->cpus, cpu_online_mask);
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if (first_cpu >= nr_cpu_ids)
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return NULL;
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return cpufreq_cpu_get(first_cpu);
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}
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/**
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* rockchip_cpufreq_adjust_target() - Adjust cpu target frequency
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* @cpu: CPU number
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* @freq: Expected target frequency
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*
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* This adjusts cpu target frequency for reducing power consumption.
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* Only one cluster can eanble frequency limit, and the cluster's
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* maximum frequency will be limited to its threshold frequency, if the
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* other cluster's frequency is geater than or equal to its threshold
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* frequency.
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*/
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unsigned int rockchip_cpufreq_adjust_target(int cpu, unsigned int freq)
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{
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struct cpufreq_policy *policy;
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struct cluster_info *cluster, *temp;
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cluster = rockchip_cluster_info_lookup(cpu);
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if (!cluster || !cluster->threshold_freq)
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goto adjust_out;
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if (cluster->freq_limit) {
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if (freq <= cluster->threshold_freq)
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goto adjust_out;
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list_for_each_entry(temp, &cluster_info_list, list_head) {
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if (temp->freq_limit || temp == cluster ||
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temp->offline)
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continue;
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policy = rockchip_get_policy(temp);
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if (!policy)
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continue;
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if (temp->threshold_freq &&
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temp->threshold_freq <= policy->cur) {
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cpufreq_cpu_put(policy);
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return cluster->threshold_freq;
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}
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cpufreq_cpu_put(policy);
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}
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} else {
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if (freq < cluster->threshold_freq)
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goto adjust_out;
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list_for_each_entry(temp, &cluster_info_list, list_head) {
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if (!temp->freq_limit || temp == cluster ||
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temp->offline)
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continue;
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policy = rockchip_get_policy(temp);
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if (!policy)
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continue;
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if (temp->threshold_freq &&
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temp->threshold_freq < policy->cur)
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cpufreq_driver_target(policy,
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temp->threshold_freq,
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CPUFREQ_RELATION_H);
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cpufreq_cpu_put(policy);
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}
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}
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adjust_out:
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return freq;
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}
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EXPORT_SYMBOL_GPL(rockchip_cpufreq_adjust_target);
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static int __init rockchip_cpufreq_driver_init(void)
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{
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struct cluster_info *cluster, *pos;
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struct cpufreq_dt_platform_data pdata = {0};
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int cpu, ret, i = 0;
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for_each_possible_cpu(cpu) {
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cluster = rockchip_cluster_info_lookup(cpu);
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if (cluster)
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continue;
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cluster = kzalloc(sizeof(*cluster), GFP_KERNEL);
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if (!cluster) {
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ret = -ENOMEM;
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goto release_cluster_info;
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}
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ret = rockchip_cpufreq_cluster_init(cpu, cluster);
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if (ret) {
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if (ret != -ENOENT) {
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pr_err("Failed to initialize dvfs info cpu%d\n",
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cpu);
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goto release_cluster_info;
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}
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/*
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* As the OPP document said, only one OPP binding
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* should be used per device.
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* And if there are multiple clusters on rockchip
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* platforms, we should use operating-points-v2.
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* So if don't support operating-points-v2, there must
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* be only one cluster, the list shuold be null.
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*/
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list_for_each_entry(pos, &cluster_info_list, list_head)
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i++;
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if (i)
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goto release_cluster_info;
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list_add(&cluster->list_head, &cluster_info_list);
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goto next;
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}
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list_add(&cluster->list_head, &cluster_info_list);
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}
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next:
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pdata.have_governor_per_policy = true;
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pdata.suspend = rockchip_cpufreq_suspend;
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return PTR_ERR_OR_ZERO(platform_device_register_data(NULL, "cpufreq-dt",
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-1, (void *)&pdata,
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sizeof(struct cpufreq_dt_platform_data)));
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release_cluster_info:
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list_for_each_entry_safe(cluster, pos, &cluster_info_list, list_head) {
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list_del(&cluster->list_head);
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kfree(cluster);
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}
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return ret;
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}
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module_init(rockchip_cpufreq_driver_init);
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MODULE_AUTHOR("Finley Xiao <finley.xiao@rock-chips.com>");
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MODULE_DESCRIPTION("Rockchip cpufreq driver");
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MODULE_LICENSE("GPL v2");
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