--- /dev/null
+--- a/drivers/clk/qcom/Makefile
++++ b/drivers/clk/qcom/Makefile
+@@ -15,6 +15,7 @@ clk-qcom-$(CONFIG_KRAIT_CLOCKS) += clk-k
+ clk-qcom-y += clk-hfpll.o
+ clk-qcom-y += reset.o
+ clk-qcom-$(CONFIG_QCOM_GDSC) += gdsc.o
++clk-qcom-y += fab_scaling.o
+
+ # Keep alphabetically sorted by config
+ obj-$(CONFIG_APQ_GCC_8084) += gcc-apq8084.o
+--- /dev/null
++++ b/drivers/clk/qcom/fab_scaling.c
+@@ -0,0 +1,172 @@
++/*
++ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
++ *
++ * Permission to use, copy, modify, and/or distribute this software for any
++ * purpose with or without fee is hereby granted, provided that the above
++ * copyright notice and this permission notice appear in all copies.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
++ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
++ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
++ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
++ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
++ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
++ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
++ */
++
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/err.h>
++#include <linux/io.h>
++#include <linux/of.h>
++#include <linux/of_device.h>
++#include <linux/clk.h>
++#include <linux/clk-provider.h>
++#include <linux/slab.h>
++#include <linux/fab_scaling.h>
++
++struct qcom_fab_scaling_data {
++ u32 fab_freq_high;
++ u32 fab_freq_nominal;
++ u32 cpu_freq_threshold;
++ struct clk *apps_fab_clk;
++ struct clk *ddr_fab_clk;
++};
++
++static struct qcom_fab_scaling_data *drv_data;
++
++int scale_fabrics(unsigned long max_cpu_freq)
++{
++ struct clk *apps_fab_clk = drv_data->apps_fab_clk,
++ *ddr_fab_clk = drv_data->ddr_fab_clk;
++ unsigned long target_freq, cur_freq;
++ int ret;
++
++ /* Skip fab scaling if the driver is not ready */
++ if (!apps_fab_clk || !ddr_fab_clk)
++ return 0;
++
++ if (max_cpu_freq > drv_data->cpu_freq_threshold)
++ target_freq = drv_data->fab_freq_high;
++ else
++ target_freq = drv_data->fab_freq_nominal;
++
++ cur_freq = clk_get_rate(ddr_fab_clk);
++
++ if (target_freq != cur_freq) {
++ ret = clk_set_rate(apps_fab_clk, target_freq);
++ if (ret)
++ return ret;
++ ret = clk_set_rate(ddr_fab_clk, target_freq);
++ if (ret)
++ return ret;
++ }
++
++ return 0;
++}
++EXPORT_SYMBOL(scale_fabrics);
++
++static int ipq806x_fab_scaling_probe(struct platform_device *pdev)
++{
++ struct device_node *np = pdev->dev.of_node;
++ struct clk *apps_fab_clk, *ddr_fab_clk;
++ int ret;
++
++ if (!np)
++ return -ENODEV;
++
++ drv_data = kzalloc(sizeof(*drv_data), GFP_KERNEL);
++ if (!drv_data)
++ return -ENOMEM;
++
++ if (of_property_read_u32(np, "fab_freq_high", &drv_data->fab_freq_high)) {
++ pr_err("FABRICS turbo freq not found. Using defaults...\n");
++ drv_data->fab_freq_high = 533000000;
++ }
++
++ if (of_property_read_u32(np, "fab_freq_nominal", &drv_data->fab_freq_nominal)) {
++ pr_err("FABRICS nominal freq not found. Using defaults...\n");
++ drv_data->fab_freq_nominal = 400000000;
++ }
++
++ if (of_property_read_u32(np, "cpu_freq_threshold", &drv_data->cpu_freq_threshold)) {
++ pr_err("FABRICS cpu freq threshold not found. Using defaults...\n");
++ drv_data->cpu_freq_threshold = 1000000000;
++ }
++
++ apps_fab_clk = devm_clk_get(&pdev->dev, "apps-fab-clk");
++ ret = PTR_ERR_OR_ZERO(apps_fab_clk);
++ if (ret) {
++ /*
++ * If apps fab clk node is present, but clock is not yet
++ * registered, we should try defering probe.
++ */
++ if (ret != -EPROBE_DEFER) {
++ pr_err("Failed to get APPS FABRIC clock: %d\n", ret);
++ ret = -ENODEV;
++ }
++ goto err;
++ }
++
++ clk_prepare_enable(apps_fab_clk);
++ clk_set_rate(apps_fab_clk, drv_data->fab_freq_high);
++ drv_data->apps_fab_clk = apps_fab_clk;
++
++ ddr_fab_clk = devm_clk_get(&pdev->dev, "ddr-fab-clk");
++ ret = PTR_ERR_OR_ZERO(ddr_fab_clk);
++ if (ret) {
++ /*
++ * If ddr fab clk node is present, but clock is not yet
++ * registered, we should try defering probe.
++ */
++ if (ret != -EPROBE_DEFER) {
++ pr_err("Failed to get DDR FABRIC clock: %d\n", ret);
++ ddr_fab_clk = NULL;
++ ret = -ENODEV;
++ }
++ goto err;
++ }
++
++ clk_prepare_enable(ddr_fab_clk);
++ clk_set_rate(ddr_fab_clk, drv_data->fab_freq_high);
++ drv_data->ddr_fab_clk = ddr_fab_clk;
++
++ return 0;
++err:
++ kfree(drv_data);
++ return ret;
++}
++
++static int ipq806x_fab_scaling_remove(struct platform_device *pdev)
++{
++ kfree(drv_data);
++ return 0;
++}
++
++static const struct of_device_id fab_scaling_ipq806x_match_table[] = {
++ { .compatible = "qcom,fab-scaling" },
++ { }
++};
++
++static struct platform_driver fab_scaling_ipq806x_driver = {
++ .probe = ipq806x_fab_scaling_probe,
++ .remove = ipq806x_fab_scaling_remove,
++ .driver = {
++ .name = "fab-scaling",
++ .of_match_table = fab_scaling_ipq806x_match_table,
++ },
++};
++
++static int __init fab_scaling_ipq806x_init(void)
++{
++ return platform_driver_register(&fab_scaling_ipq806x_driver);
++}
++late_initcall(fab_scaling_ipq806x_init);
++
++static void __exit fab_scaling_ipq806x_exit(void)
++{
++ platform_driver_unregister(&fab_scaling_ipq806x_driver);
++}
++module_exit(fab_scaling_ipq806x_exit);
+--- /dev/null
++++ b/include/linux/fab_scaling.h
+@@ -0,0 +1,31 @@
++/*
++ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
++ *
++ * Permission to use, copy, modify, and/or distribute this software for any
++ * purpose with or without fee is hereby granted, provided that the above
++ * copyright notice and this permission notice appear in all copies.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
++ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
++ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
++ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
++ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
++ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
++ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
++ */
++
++
++#ifndef __FAB_SCALING_H
++#define __FAB_SCALING_H
++
++/**
++ * scale_fabrics - Scale DDR and APPS FABRICS
++ *
++ * This function monitors all the registered clocks and does APPS
++ * and DDR FABRIC scaling based on the idle frequencies with which
++ * it was registered.
++ *
++ */
++int scale_fabrics(unsigned long max_cpu_freq);
++
++#endif
+--- a/drivers/cpufreq/qcom-cpufreq-krait.c
++++ b/drivers/cpufreq/qcom-cpufreq-krait.c
+@@ -15,6 +15,7 @@
+ #include <linux/regulator/consumer.h>
+ #include <linux/slab.h>
+ #include <linux/thermal.h>
++#include <linux/fab_scaling.h>
+
+ #include "cpufreq-dt.h"
+
+@@ -54,6 +55,13 @@ static int set_target(struct cpufreq_pol
+ level = dev_pm_opp_get_level(opp);
+ dev_pm_opp_put(opp);
+
++ /*
++ * Scale fabrics with max freq across all cores
++ */
++ ret = scale_fabrics(target_freq);
++ if (ret)
++ return ret;
++
+ opp = dev_pm_opp_find_level_exact(&l2_pdev->dev, level);
+ if (IS_ERR(opp)) {
+ dev_err(&l2_pdev->dev,
projects / openwrt / openwrt.git / blobdiff