+++ /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"
-
-@@ -74,6 +75,13 @@ static int set_target(struct cpufreq_pol
- goto l2_scale_fail;
- }
-
-+ /*
-+ * Scale fabrics with max freq across all cores
-+ */
-+ ret = scale_fabrics(target_freq);
-+ if (ret)
-+ goto l2_scale_fail;
-+
- opp = dev_pm_opp_find_level_exact(l2_dev, level);
- if (IS_ERR(opp)) {
- dev_err(l2_dev,
--- /dev/null
+From 13f075999935bb696dbab63243923179f06fa05e Mon Sep 17 00:00:00 2001
+From: Christian Marangi <ansuelsmth@gmail.com>
+Date: Thu, 16 Jun 2022 19:56:08 +0200
+Subject: [PATCH 3/4] devfreq: add ipq806x fabric scaling driver
+
+Add ipq806x fabric scaling driver using the devfreq passive governor.
+
+Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
+---
+ drivers/devfreq/Kconfig | 11 ++
+ drivers/devfreq/Makefile | 1 +
+ drivers/devfreq/ipq806x-fab-devfreq.c | 155 ++++++++++++++++++++++++++
+ 3 files changed, 167 insertions(+)
+ create mode 100644 drivers/devfreq/ipq806x-fab-devfreq.c
+
+--- a/drivers/devfreq/Kconfig
++++ b/drivers/devfreq/Kconfig
+@@ -143,6 +143,17 @@ config ARM_KRAIT_CACHE_DEVFREQ
+ based on the max frequency across all core and the range set in the device
+ dts. If provided this scale also the regulator attached to the l2 cache.
+
++config ARM_IPQ806X_FAB_DEVFREQ
++ tristate "Scaling support for ipq806x Soc Fabric"
++ depends on ARCH_QCOM || COMPILE_TEST
++ select DEVFREQ_GOV_PASSIVE
++ help
++ This adds the DEVFREQ driver for the ipq806x Soc Fabric.
++
++ The driver register with the cpufreq notifier and find the right frequency
++ based on the max frequency across all core and the range set in the device
++ dts.
++
+ source "drivers/devfreq/event/Kconfig"
+
+ endif # PM_DEVFREQ
+--- a/drivers/devfreq/Makefile
++++ b/drivers/devfreq/Makefile
+@@ -14,6 +14,7 @@ obj-$(CONFIG_ARM_IMX8M_DDRC_DEVFREQ) +=
+ obj-$(CONFIG_ARM_RK3399_DMC_DEVFREQ) += rk3399_dmc.o
+ obj-$(CONFIG_ARM_TEGRA_DEVFREQ) += tegra30-devfreq.o
+ obj-$(CONFIG_ARM_KRAIT_CACHE_DEVFREQ) += krait-cache-devfreq.o
++obj-$(CONFIG_ARM_IPQ806X_FAB_DEVFREQ) += ipq806x-fab-devfreq.o
+
+ # DEVFREQ Event Drivers
+ obj-$(CONFIG_PM_DEVFREQ_EVENT) += event/
+--- /dev/null
++++ b/drivers/devfreq/ipq806x-fab-devfreq.c
+@@ -0,0 +1,155 @@
++// SPDX-License-Identifier: GPL-2.0
++
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/cpufreq.h>
++#include <linux/devfreq.h>
++#include <linux/of.h>
++#include <linux/platform_device.h>
++#include <linux/clk.h>
++#include <linux/slab.h>
++#include <linux/pm_opp.h>
++
++#include "governor.h"
++
++struct ipq806x_fab_data {
++ struct clk *fab_clk;
++ struct clk *ddr_clk;
++};
++
++static int ipq806x_fab_get_cur_freq(struct device *dev, unsigned long *freq)
++{
++ struct ipq806x_fab_data *data = dev_get_drvdata(dev);
++
++ *freq = clk_get_rate(data->fab_clk);
++
++ return 0;
++};
++
++static int ipq806x_fab_target(struct device *dev, unsigned long *freq,
++ u32 flags)
++{
++ struct ipq806x_fab_data *data = dev_get_drvdata(dev);
++ struct dev_pm_opp *opp;
++ int ret;
++
++ opp = dev_pm_opp_find_freq_ceil(dev, freq);
++ if (unlikely(IS_ERR(opp)))
++ return PTR_ERR(opp);
++
++ dev_pm_opp_put(opp);
++
++ ret = clk_set_rate(data->fab_clk, *freq);
++ if (ret)
++ return ret;
++
++ return clk_set_rate(data->ddr_clk, *freq);
++};
++
++static int ipq806x_fab_get_dev_status(struct device *dev,
++ struct devfreq_dev_status *stat)
++{
++ struct ipq806x_fab_data *data = dev_get_drvdata(dev);
++
++ stat->busy_time = 0;
++ stat->total_time = 0;
++ stat->current_frequency = clk_get_rate(data->fab_clk);
++
++ return 0;
++};
++
++static struct devfreq_dev_profile ipq806x_fab_devfreq_profile = {
++ .target = ipq806x_fab_target,
++ .get_dev_status = ipq806x_fab_get_dev_status,
++ .get_cur_freq = ipq806x_fab_get_cur_freq
++};
++
++static struct devfreq_passive_data devfreq_gov_data = {
++ .parent_type = CPUFREQ_PARENT_DEV,
++};
++
++static int ipq806x_fab_probe(struct platform_device *pdev)
++{
++ struct device *dev = &pdev->dev;
++ struct ipq806x_fab_data *data;
++ struct devfreq *devfreq;
++ struct clk *clk;
++ int ret;
++
++ data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
++ if (!data)
++ return -ENOMEM;
++
++ clk = devm_clk_get(dev, "apps-fab-clk");
++ if (IS_ERR(clk)) {
++ dev_err_probe(dev, PTR_ERR(clk), "failed to get apps fab clk\n");
++ return PTR_ERR(clk);
++ }
++
++ clk_prepare_enable(clk);
++ data->fab_clk = clk;
++
++ clk = devm_clk_get(dev, "ddr-fab-clk");
++ if (IS_ERR(clk)) {
++ dev_err_probe(dev, PTR_ERR(clk), "failed to get ddr fab clk\n");
++ goto err_ddr;
++ }
++
++ clk_prepare_enable(clk);
++ data->ddr_clk = clk;
++
++ ret = dev_pm_opp_of_add_table(dev);
++ if (ret) {
++ dev_err(dev, "failed to parse fab freq thresholds\n");
++ return ret;
++ }
++
++ dev_set_drvdata(dev, data);
++
++ devfreq = devm_devfreq_add_device(&pdev->dev, &ipq806x_fab_devfreq_profile,
++ DEVFREQ_GOV_PASSIVE, &devfreq_gov_data);
++ if (IS_ERR(devfreq))
++ dev_pm_opp_remove_table(dev);
++
++ return PTR_ERR_OR_ZERO(devfreq);
++
++err_ddr:
++ clk_unprepare(data->fab_clk);
++ clk_put(data->fab_clk);
++ return PTR_ERR(clk);
++};
++
++static int ipq806x_fab_remove(struct platform_device *pdev)
++{
++ struct ipq806x_fab_data *data = dev_get_drvdata(&pdev->dev);
++
++ clk_unprepare(data->fab_clk);
++ clk_put(data->fab_clk);
++
++ clk_unprepare(data->ddr_clk);
++ clk_put(data->ddr_clk);
++
++ dev_pm_opp_remove_table(&pdev->dev);
++
++ return 0;
++};
++
++static const struct of_device_id ipq806x_fab_match_table[] = {
++ { .compatible = "qcom,fab-scaling" },
++ {}
++};
++
++static struct platform_driver ipq806x_fab_driver = {
++ .probe = ipq806x_fab_probe,
++ .remove = ipq806x_fab_remove,
++ .driver = {
++ .name = "ipq806x-fab-scaling",
++ .of_match_table = ipq806x_fab_match_table,
++ },
++};
++module_platform_driver(ipq806x_fab_driver);
++
++MODULE_DESCRIPTION("ipq806x Fab Scaling driver");
++MODULE_AUTHOR("Christian Marangi <ansuelsmth@gmail.com>");
++MODULE_LICENSE("GPL v2");
projects / openwrt / openwrt.git / commitdiff