ipq806x: remove support for kernel 4.19

The target uses 5.4 as default kernel since 04/2020.

Kernel 4.19 support is not really maintained anymore, and there has
been a lot of changes between 4.19 and 5.4 on this target. Despite,
new devices are typically added for 5.4 only anyway.

Thus, make maintaining of old stuff and reviewing of new stuff
easier by removing support for kernel 4.19.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 0 insertions, 243 deletions

diff --git a/target/linux/ipq806x/patches-4.19/0057-add-fab-scaling-support-with-cpufreq.patch b/target/linux/ipq806x/patches-4.19/0057-add-fab-scaling-support-with-cpufreq.patch
deleted file mode 100644
index dc65230f47..0000000000
--- a/target/linux/ipq806x/patches-4.19/0057-add-fab-scaling-support-with-cpufreq.patch
+++ /dev/null
@@ -1,243 +0,0 @@
---- 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;
-+	}
-+
-+	drv_data->apps_fab_clk = devm_clk_get(&pdev->dev, "apps-fab-clk");
-+	apps_fab_clk = drv_data->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_set_rate(apps_fab_clk, drv_data->fab_freq_high);
-+	clk_prepare_enable(apps_fab_clk);
-+
-+	drv_data->ddr_fab_clk = devm_clk_get(&pdev->dev, "ddr-fab-clk");
-+	ddr_fab_clk = drv_data->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_set_rate(ddr_fab_clk, drv_data->fab_freq_high);
-+	clk_prepare_enable(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/cpufreq-dt.c
-+++ b/drivers/cpufreq/cpufreq-dt.c
-@@ -24,6 +24,7 @@
- #include <linux/regulator/consumer.h>
- #include <linux/slab.h>
- #include <linux/thermal.h>
-+#include <linux/fab_scaling.h>
- 
- #include "cpufreq-dt.h"
- 
-@@ -106,6 +107,13 @@ static int set_target(struct cpufreq_pol
- 					}
- 				}
- 			}
-+
-+			/*
-+			 * Scale fabrics with max freq across all cores
-+			 */
-+			ret = scale_fabrics(target_freq);
-+			if (ret)
-+				goto exit;
- 		}
- 		priv->opp_freq = freq * 1000;
- 		arch_set_freq_scale(policy->related_cpus, freq,