From f5f173e2b794bd996fa6171bb6b18f13c4ed1e90 Mon Sep 17 00:00:00 2001 From: John Crispin Date: Mon, 23 May 2016 11:20:20 +0200 Subject: mediatek: update patches * fixes NAND * adds latest ethernet patches Signed-off-by: John Crispin --- .../0055-cpufreq-mediatek-add-driver.patch | 443 +++++++++++++++++++++ 1 file changed, 443 insertions(+) create mode 100644 target/linux/mediatek/patches-4.4/0055-cpufreq-mediatek-add-driver.patch (limited to 'target/linux/mediatek/patches-4.4/0055-cpufreq-mediatek-add-driver.patch') diff --git a/target/linux/mediatek/patches-4.4/0055-cpufreq-mediatek-add-driver.patch b/target/linux/mediatek/patches-4.4/0055-cpufreq-mediatek-add-driver.patch new file mode 100644 index 0000000..897b8c7 --- /dev/null +++ b/target/linux/mediatek/patches-4.4/0055-cpufreq-mediatek-add-driver.patch @@ -0,0 +1,443 @@ +From 60f4e41b367bdb29530468c91c1e613b17a37755 Mon Sep 17 00:00:00 2001 +From: John Crispin +Date: Wed, 30 Mar 2016 23:48:53 +0200 +Subject: [PATCH 055/102] cpufreq: mediatek: add driver + +Signed-off-by: John Crispin +--- + drivers/cpufreq/Kconfig.arm | 9 + + drivers/cpufreq/Makefile | 1 + + drivers/cpufreq/mt7623-cpufreq.c | 389 ++++++++++++++++++++++++++++++++++++++ + 3 files changed, 399 insertions(+) + create mode 100644 drivers/cpufreq/mt7623-cpufreq.c + +diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm +index b1f8a73..baf945e 100644 +--- a/drivers/cpufreq/Kconfig.arm ++++ b/drivers/cpufreq/Kconfig.arm +@@ -81,6 +81,15 @@ config ARM_KIRKWOOD_CPUFREQ + This adds the CPUFreq driver for Marvell Kirkwood + SoCs. + ++config ARM_MT7623_CPUFREQ ++ bool "Mediatek MT7623 CPUFreq support" ++ depends on ARCH_MEDIATEK && REGULATOR ++ depends on ARM || (ARM_CPU_TOPOLOGY && COMPILE_TEST) ++ depends on !CPU_THERMAL || THERMAL=y ++ select PM_OPP ++ help ++ This adds the CPUFreq driver support for Mediatek MT7623 SoC. ++ + config ARM_MT8173_CPUFREQ + bool "Mediatek MT8173 CPUFreq support" + depends on ARCH_MEDIATEK && REGULATOR +diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile +index c0af1a1..e198752 100644 +--- a/drivers/cpufreq/Makefile ++++ b/drivers/cpufreq/Makefile +@@ -57,6 +57,7 @@ obj-$(CONFIG_ARM_HISI_ACPU_CPUFREQ) += hisi-acpu-cpufreq.o + obj-$(CONFIG_ARM_IMX6Q_CPUFREQ) += imx6q-cpufreq.o + obj-$(CONFIG_ARM_INTEGRATOR) += integrator-cpufreq.o + obj-$(CONFIG_ARM_KIRKWOOD_CPUFREQ) += kirkwood-cpufreq.o ++obj-$(CONFIG_ARM_MT7623_CPUFREQ) += mt7623-cpufreq.o + obj-$(CONFIG_ARM_MT8173_CPUFREQ) += mt8173-cpufreq.o + obj-$(CONFIG_ARM_OMAP2PLUS_CPUFREQ) += omap-cpufreq.o + obj-$(CONFIG_ARM_PXA2xx_CPUFREQ) += pxa2xx-cpufreq.o +diff --git a/drivers/cpufreq/mt7623-cpufreq.c b/drivers/cpufreq/mt7623-cpufreq.c +new file mode 100644 +index 0000000..8d154ce +--- /dev/null ++++ b/drivers/cpufreq/mt7623-cpufreq.c +@@ -0,0 +1,389 @@ ++/* ++ * Copyright (c) 2015 Linaro Ltd. ++ * Author: Pi-Cheng Chen ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ */ ++ ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++ ++#define VOLT_TOL (10000) ++ ++/* ++ * When scaling the clock frequency of a CPU clock domain, the clock source ++ * needs to be switched to another stable PLL clock temporarily until ++ * the original PLL becomes stable at target frequency. ++ */ ++struct mtk_cpu_dvfs_info { ++ struct device *cpu_dev; ++ struct regulator *proc_reg; ++ struct clk *cpu_clk; ++ struct clk *inter_clk; ++ struct thermal_cooling_device *cdev; ++ int intermediate_voltage; ++}; ++ ++static int mtk_cpufreq_set_voltage(struct mtk_cpu_dvfs_info *info, int vproc) ++{ ++ return regulator_set_voltage(info->proc_reg, vproc, ++ vproc + VOLT_TOL); ++} ++ ++static int mtk_cpufreq_set_target(struct cpufreq_policy *policy, ++ unsigned int index) ++{ ++ struct cpufreq_frequency_table *freq_table = policy->freq_table; ++ struct clk *cpu_clk = policy->clk; ++ struct clk *armpll = clk_get_parent(cpu_clk); ++ struct mtk_cpu_dvfs_info *info = policy->driver_data; ++ struct device *cpu_dev = info->cpu_dev; ++ struct dev_pm_opp *opp; ++ long freq_hz, old_freq_hz; ++ int vproc, old_vproc, inter_vproc, target_vproc, ret; ++ ++ inter_vproc = info->intermediate_voltage; ++ ++ old_freq_hz = clk_get_rate(cpu_clk); ++ old_vproc = regulator_get_voltage(info->proc_reg); ++ ++ freq_hz = freq_table[index].frequency * 1000; ++ ++ rcu_read_lock(); ++ opp = dev_pm_opp_find_freq_ceil(cpu_dev, &freq_hz); ++ if (IS_ERR(opp)) { ++ rcu_read_unlock(); ++ pr_err("cpu%d: failed to find OPP for %ld\n", ++ policy->cpu, freq_hz); ++ return PTR_ERR(opp); ++ } ++ vproc = dev_pm_opp_get_voltage(opp); ++ rcu_read_unlock(); ++ ++ /* ++ * If the new voltage or the intermediate voltage is higher than the ++ * current voltage, scale up voltage first. ++ */ ++ target_vproc = (inter_vproc > vproc) ? inter_vproc : vproc; ++ if (old_vproc < target_vproc) { ++ ret = mtk_cpufreq_set_voltage(info, target_vproc); ++ if (ret) { ++ pr_err("cpu%d: failed to scale up voltage!\n", ++ policy->cpu); ++ mtk_cpufreq_set_voltage(info, old_vproc); ++ return ret; ++ } ++ } ++ ++ /* Reparent the CPU clock to intermediate clock. */ ++ ret = clk_set_parent(cpu_clk, info->inter_clk); ++ if (ret) { ++ pr_err("cpu%d: failed to re-parent cpu clock!\n", ++ policy->cpu); ++ mtk_cpufreq_set_voltage(info, old_vproc); ++ WARN_ON(1); ++ return ret; ++ } ++ ++ /* Set the original PLL to target rate. */ ++ ret = clk_set_rate(armpll, freq_hz); ++ if (ret) { ++ pr_err("cpu%d: failed to scale cpu clock rate!\n", ++ policy->cpu); ++ clk_set_parent(cpu_clk, armpll); ++ mtk_cpufreq_set_voltage(info, old_vproc); ++ return ret; ++ } ++ ++ /* Set parent of CPU clock back to the original PLL. */ ++ ret = clk_set_parent(cpu_clk, armpll); ++ if (ret) { ++ pr_err("cpu%d: failed to re-parent cpu clock!\n", ++ policy->cpu); ++ mtk_cpufreq_set_voltage(info, inter_vproc); ++ WARN_ON(1); ++ return ret; ++ } ++ ++ /* ++ * If the new voltage is lower than the intermediate voltage or the ++ * original voltage, scale down to the new voltage. ++ */ ++ if (vproc < inter_vproc || vproc < old_vproc) { ++ ret = mtk_cpufreq_set_voltage(info, vproc); ++ if (ret) { ++ pr_err("cpu%d: failed to scale down voltage!\n", ++ policy->cpu); ++ clk_set_parent(cpu_clk, info->inter_clk); ++ clk_set_rate(armpll, old_freq_hz); ++ clk_set_parent(cpu_clk, armpll); ++ return ret; ++ } ++ } ++ ++ return 0; ++} ++ ++static void mtk_cpufreq_ready(struct cpufreq_policy *policy) ++{ ++ struct mtk_cpu_dvfs_info *info = policy->driver_data; ++ struct device_node *np = of_node_get(info->cpu_dev->of_node); ++ ++ if (WARN_ON(!np)) ++ return; ++ ++ if (of_find_property(np, "#cooling-cells", NULL)) { ++ info->cdev = of_cpufreq_cooling_register(np, ++ policy->related_cpus); ++ ++ if (IS_ERR(info->cdev)) { ++ dev_err(info->cpu_dev, ++ "running cpufreq without cooling device: %ld\n", ++ PTR_ERR(info->cdev)); ++ ++ info->cdev = NULL; ++ } ++ } ++ ++ of_node_put(np); ++} ++ ++static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu) ++{ ++ struct device *cpu_dev; ++ struct regulator *proc_reg = ERR_PTR(-ENODEV); ++ struct clk *cpu_clk = ERR_PTR(-ENODEV); ++ struct clk *inter_clk = ERR_PTR(-ENODEV); ++ struct dev_pm_opp *opp; ++ unsigned long rate; ++ int ret; ++ ++ cpu_dev = get_cpu_device(cpu); ++ if (!cpu_dev) { ++ pr_err("failed to get cpu%d device\n", cpu); ++ return -ENODEV; ++ } ++ ++ cpu_clk = clk_get(cpu_dev, "cpu"); ++ if (IS_ERR(cpu_clk)) { ++ if (PTR_ERR(cpu_clk) == -EPROBE_DEFER) ++ pr_warn("cpu clk for cpu%d not ready, retry.\n", cpu); ++ else ++ pr_err("failed to get cpu clk for cpu%d\n", cpu); ++ ++ ret = PTR_ERR(cpu_clk); ++ return ret; ++ } ++ ++ inter_clk = clk_get(cpu_dev, "intermediate"); ++ if (IS_ERR(inter_clk)) { ++ if (PTR_ERR(inter_clk) == -EPROBE_DEFER) ++ pr_warn("intermediate clk for cpu%d not ready, retry.\n", ++ cpu); ++ else ++ pr_err("failed to get intermediate clk for cpu%d\n", ++ cpu); ++ ++ ret = PTR_ERR(inter_clk); ++ goto out_free_resources; ++ } ++ ++ proc_reg = regulator_get_exclusive(cpu_dev, "proc"); ++ if (IS_ERR(proc_reg)) { ++ if (PTR_ERR(proc_reg) == -EPROBE_DEFER) ++ pr_warn("proc regulator for cpu%d not ready, retry.\n", ++ cpu); ++ else ++ pr_err("failed to get proc regulator for cpu%d\n", ++ cpu); ++ ++ ret = PTR_ERR(proc_reg); ++ goto out_free_resources; ++ } ++ ++ ret = dev_pm_opp_of_add_table(cpu_dev); ++ if (ret) { ++ pr_warn("no OPP table for cpu%d\n", cpu); ++ goto out_free_resources; ++ } ++ ++ /* Search a safe voltage for intermediate frequency. */ ++ rate = clk_get_rate(inter_clk); ++ rcu_read_lock(); ++ opp = dev_pm_opp_find_freq_ceil(cpu_dev, &rate); ++ if (IS_ERR(opp)) { ++ rcu_read_unlock(); ++ pr_err("failed to get intermediate opp for cpu%d\n", cpu); ++ ret = PTR_ERR(opp); ++ goto out_free_opp_table; ++ } ++ info->intermediate_voltage = dev_pm_opp_get_voltage(opp); ++ rcu_read_unlock(); ++ ++ info->cpu_dev = cpu_dev; ++ info->proc_reg = proc_reg; ++ info->cpu_clk = cpu_clk; ++ info->inter_clk = inter_clk; ++ ++ return 0; ++ ++out_free_opp_table: ++ dev_pm_opp_of_remove_table(cpu_dev); ++ ++out_free_resources: ++ if (!IS_ERR(proc_reg)) ++ regulator_put(proc_reg); ++ if (!IS_ERR(cpu_clk)) ++ clk_put(cpu_clk); ++ if (!IS_ERR(inter_clk)) ++ clk_put(inter_clk); ++ ++ return ret; ++} ++ ++static void mtk_cpu_dvfs_info_release(struct mtk_cpu_dvfs_info *info) ++{ ++ if (!IS_ERR(info->proc_reg)) ++ regulator_put(info->proc_reg); ++ if (!IS_ERR(info->cpu_clk)) ++ clk_put(info->cpu_clk); ++ if (!IS_ERR(info->inter_clk)) ++ clk_put(info->inter_clk); ++ ++ dev_pm_opp_of_remove_table(info->cpu_dev); ++} ++ ++static int mtk_cpufreq_init(struct cpufreq_policy *policy) ++{ ++ struct mtk_cpu_dvfs_info *info; ++ struct cpufreq_frequency_table *freq_table; ++ int ret; ++ ++ info = kzalloc(sizeof(*info), GFP_KERNEL); ++ if (!info) ++ return -ENOMEM; ++ ++ ret = mtk_cpu_dvfs_info_init(info, policy->cpu); ++ if (ret) { ++ pr_err("%s failed to initialize dvfs info for cpu%d\n", ++ __func__, policy->cpu); ++ goto out_free_dvfs_info; ++ } ++ ++ ret = dev_pm_opp_init_cpufreq_table(info->cpu_dev, &freq_table); ++ if (ret) { ++ pr_err("failed to init cpufreq table for cpu%d: %d\n", ++ policy->cpu, ret); ++ goto out_release_dvfs_info; ++ } ++ ++ ret = cpufreq_table_validate_and_show(policy, freq_table); ++ if (ret) { ++ pr_err("%s: invalid frequency table: %d\n", __func__, ret); ++ goto out_free_cpufreq_table; ++ } ++ ++ /* CPUs in the same cluster share a clock and power domain. */ ++ cpumask_setall(policy->cpus); ++ policy->driver_data = info; ++ policy->clk = info->cpu_clk; ++ ++ return 0; ++ ++out_free_cpufreq_table: ++ dev_pm_opp_free_cpufreq_table(info->cpu_dev, &freq_table); ++ ++out_release_dvfs_info: ++ mtk_cpu_dvfs_info_release(info); ++ ++out_free_dvfs_info: ++ kfree(info); ++ ++ return ret; ++} ++ ++static int mtk_cpufreq_exit(struct cpufreq_policy *policy) ++{ ++ struct mtk_cpu_dvfs_info *info = policy->driver_data; ++ ++ cpufreq_cooling_unregister(info->cdev); ++ dev_pm_opp_free_cpufreq_table(info->cpu_dev, &policy->freq_table); ++ mtk_cpu_dvfs_info_release(info); ++ kfree(info); ++ ++ return 0; ++} ++ ++static struct cpufreq_driver mt7623_cpufreq_driver = { ++ .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK, ++ .verify = cpufreq_generic_frequency_table_verify, ++ .target_index = mtk_cpufreq_set_target, ++ .get = cpufreq_generic_get, ++ .init = mtk_cpufreq_init, ++ .exit = mtk_cpufreq_exit, ++ .ready = mtk_cpufreq_ready, ++ .name = "mtk-cpufreq", ++ .attr = cpufreq_generic_attr, ++}; ++ ++static int mt7623_cpufreq_probe(struct platform_device *pdev) ++{ ++ int ret; ++ ++ ret = cpufreq_register_driver(&mt7623_cpufreq_driver); ++ if (ret) ++ pr_err("failed to register mtk cpufreq driver\n"); ++ ++ return ret; ++} ++ ++static struct platform_driver mt7623_cpufreq_platdrv = { ++ .driver = { ++ .name = "mt7623-cpufreq", ++ }, ++ .probe = mt7623_cpufreq_probe, ++}; ++ ++static int mt7623_cpufreq_driver_init(void) ++{ ++ struct platform_device *pdev; ++ int err; ++ ++ if (!of_machine_is_compatible("mediatek,mt7623")) ++ return -ENODEV; ++ ++ err = platform_driver_register(&mt7623_cpufreq_platdrv); ++ if (err) ++ return err; ++ ++ /* ++ * Since there's no place to hold device registration code and no ++ * device tree based way to match cpufreq driver yet, both the driver ++ * and the device registration codes are put here to handle defer ++ * probing. ++ */ ++ pdev = platform_device_register_simple("mt7623-cpufreq", -1, NULL, 0); ++ if (IS_ERR(pdev)) { ++ pr_err("failed to register mtk-cpufreq platform device\n"); ++ return PTR_ERR(pdev); ++ } ++ ++ return 0; ++} ++device_initcall(mt7623_cpufreq_driver_init); +-- +1.7.10.4 + -- cgit v1.1