Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933292Ab3HGOry (ORCPT ); Wed, 7 Aug 2013 10:47:54 -0400 Received: from mail-pd0-f173.google.com ([209.85.192.173]:64612 "EHLO mail-pd0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757588Ab3HGOrs (ORCPT ); Wed, 7 Aug 2013 10:47:48 -0400 From: Viresh Kumar To: rjw@sisk.pl, swarren@nvidia.com Cc: linaro-kernel@lists.linaro.org, patches@linaro.org, cpufreq@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, mturquette@linaro.org, linux-arm-kernel@lists.infradead.org, Viresh Kumar Subject: [PATCH 6/6] cpufreq: Tegra: Remove tegra-cpufreq driver Date: Wed, 7 Aug 2013 20:16:48 +0530 Message-Id: X-Mailer: git-send-email 1.7.12.rc2.18.g61b472e In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 8458 Lines: 327 We are using generic cpufreq-cpu0 driver, so lets get rid of platform specific tegra-cpufreq.c driver. Signed-off-by: Viresh Kumar --- drivers/cpufreq/Makefile | 1 - drivers/cpufreq/tegra-cpufreq.c | 291 ---------------------------------------- 2 files changed, 292 deletions(-) delete mode 100644 drivers/cpufreq/tegra-cpufreq.c diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index ad5866c..e74b3ee 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -76,7 +76,6 @@ obj-$(CONFIG_ARM_S5PV210_CPUFREQ) += s5pv210-cpufreq.o obj-$(CONFIG_ARM_SA1100_CPUFREQ) += sa1100-cpufreq.o obj-$(CONFIG_ARM_SA1110_CPUFREQ) += sa1110-cpufreq.o obj-$(CONFIG_ARM_SPEAR_CPUFREQ) += spear-cpufreq.o -obj-$(CONFIG_ARM_TEGRA_CPUFREQ) += tegra-cpufreq.o ################################################################################## # PowerPC platform drivers diff --git a/drivers/cpufreq/tegra-cpufreq.c b/drivers/cpufreq/tegra-cpufreq.c deleted file mode 100644 index cd66b85..0000000 --- a/drivers/cpufreq/tegra-cpufreq.c +++ /dev/null @@ -1,291 +0,0 @@ -/* - * Copyright (C) 2010 Google, Inc. - * - * Author: - * Colin Cross - * Based on arch/arm/plat-omap/cpu-omap.c, (C) 2005 Nokia Corporation - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * 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 - -static struct cpufreq_frequency_table freq_table[] = { - { .frequency = 216000 }, - { .frequency = 312000 }, - { .frequency = 456000 }, - { .frequency = 608000 }, - { .frequency = 760000 }, - { .frequency = 816000 }, - { .frequency = 912000 }, - { .frequency = 1000000 }, - { .frequency = CPUFREQ_TABLE_END }, -}; - -#define NUM_CPUS 2 - -static struct clk *cpu_clk; -static struct clk *pll_x_clk; -static struct clk *pll_p_clk; -static struct clk *emc_clk; - -static unsigned long target_cpu_speed[NUM_CPUS]; -static DEFINE_MUTEX(tegra_cpu_lock); -static bool is_suspended; - -static int tegra_verify_speed(struct cpufreq_policy *policy) -{ - return cpufreq_frequency_table_verify(policy, freq_table); -} - -static unsigned int tegra_getspeed(unsigned int cpu) -{ - unsigned long rate; - - if (cpu >= NUM_CPUS) - return 0; - - rate = clk_get_rate(cpu_clk) / 1000; - return rate; -} - -static int tegra_cpu_clk_set_rate(unsigned long rate) -{ - int ret; - - /* - * Take an extra reference to the main pll so it doesn't turn - * off when we move the cpu off of it - */ - clk_prepare_enable(pll_x_clk); - - ret = clk_set_parent(cpu_clk, pll_p_clk); - if (ret) { - pr_err("Failed to switch cpu to clock pll_p\n"); - goto out; - } - - if (rate == clk_get_rate(pll_p_clk)) - goto out; - - ret = clk_set_rate(pll_x_clk, rate); - if (ret) { - pr_err("Failed to change pll_x to %lu\n", rate); - goto out; - } - - ret = clk_set_parent(cpu_clk, pll_x_clk); - if (ret) { - pr_err("Failed to switch cpu to clock pll_x\n"); - goto out; - } - -out: - clk_disable_unprepare(pll_x_clk); - return ret; -} - -static int tegra_update_cpu_speed(struct cpufreq_policy *policy, - unsigned long rate) -{ - int ret = 0; - struct cpufreq_freqs freqs; - - freqs.old = tegra_getspeed(0); - freqs.new = rate; - - if (freqs.old == freqs.new) - return ret; - - /* - * Vote on memory bus frequency based on cpu frequency - * This sets the minimum frequency, display or avp may request higher - */ - if (rate >= 816000) - clk_set_rate(emc_clk, 600000000); /* cpu 816 MHz, emc max */ - else if (rate >= 456000) - clk_set_rate(emc_clk, 300000000); /* cpu 456 MHz, emc 150Mhz */ - else - clk_set_rate(emc_clk, 100000000); /* emc 50Mhz */ - - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); - -#ifdef CONFIG_CPU_FREQ_DEBUG - printk(KERN_DEBUG "cpufreq-tegra: transition: %u --> %u\n", - freqs.old, freqs.new); -#endif - - ret = tegra_cpu_clk_set_rate(freqs.new * 1000); - if (ret) { - pr_err("cpu-tegra: Failed to set cpu frequency to %d kHz\n", - freqs.new); - freqs.new = freqs.old; - } - - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); - - return ret; -} - -static unsigned long tegra_cpu_highest_speed(void) -{ - unsigned long rate = 0; - int i; - - for_each_online_cpu(i) - rate = max(rate, target_cpu_speed[i]); - return rate; -} - -static int tegra_target(struct cpufreq_policy *policy, - unsigned int target_freq, - unsigned int relation) -{ - unsigned int idx; - unsigned int freq; - int ret = 0; - - mutex_lock(&tegra_cpu_lock); - - if (is_suspended) { - ret = -EBUSY; - goto out; - } - - cpufreq_frequency_table_target(policy, freq_table, target_freq, - relation, &idx); - - freq = freq_table[idx].frequency; - - target_cpu_speed[policy->cpu] = freq; - - ret = tegra_update_cpu_speed(policy, tegra_cpu_highest_speed()); - -out: - mutex_unlock(&tegra_cpu_lock); - return ret; -} - -static int tegra_pm_notify(struct notifier_block *nb, unsigned long event, - void *dummy) -{ - mutex_lock(&tegra_cpu_lock); - if (event == PM_SUSPEND_PREPARE) { - struct cpufreq_policy *policy = cpufreq_cpu_get(0); - is_suspended = true; - pr_info("Tegra cpufreq suspend: setting frequency to %d kHz\n", - freq_table[0].frequency); - tegra_update_cpu_speed(policy, freq_table[0].frequency); - cpufreq_cpu_put(policy); - } else if (event == PM_POST_SUSPEND) { - is_suspended = false; - } - mutex_unlock(&tegra_cpu_lock); - - return NOTIFY_OK; -} - -static struct notifier_block tegra_cpu_pm_notifier = { - .notifier_call = tegra_pm_notify, -}; - -static int tegra_cpu_init(struct cpufreq_policy *policy) -{ - if (policy->cpu >= NUM_CPUS) - return -EINVAL; - - clk_prepare_enable(emc_clk); - clk_prepare_enable(cpu_clk); - - cpufreq_frequency_table_cpuinfo(policy, freq_table); - cpufreq_frequency_table_get_attr(freq_table, policy->cpu); - policy->cur = tegra_getspeed(policy->cpu); - target_cpu_speed[policy->cpu] = policy->cur; - - /* FIXME: what's the actual transition time? */ - policy->cpuinfo.transition_latency = 300 * 1000; - - cpumask_copy(policy->cpus, cpu_possible_mask); - - if (policy->cpu == 0) - register_pm_notifier(&tegra_cpu_pm_notifier); - - return 0; -} - -static int tegra_cpu_exit(struct cpufreq_policy *policy) -{ - cpufreq_frequency_table_cpuinfo(policy, freq_table); - clk_disable_unprepare(emc_clk); - return 0; -} - -static struct freq_attr *tegra_cpufreq_attr[] = { - &cpufreq_freq_attr_scaling_available_freqs, - NULL, -}; - -static struct cpufreq_driver tegra_cpufreq_driver = { - .verify = tegra_verify_speed, - .target = tegra_target, - .get = tegra_getspeed, - .init = tegra_cpu_init, - .exit = tegra_cpu_exit, - .name = "tegra", - .attr = tegra_cpufreq_attr, -}; - -static int __init tegra_cpufreq_init(void) -{ - cpu_clk = clk_get_sys(NULL, "cpu"); - if (IS_ERR(cpu_clk)) - return PTR_ERR(cpu_clk); - - pll_x_clk = clk_get_sys(NULL, "pll_x"); - if (IS_ERR(pll_x_clk)) - return PTR_ERR(pll_x_clk); - - pll_p_clk = clk_get_sys(NULL, "pll_p_cclk"); - if (IS_ERR(pll_p_clk)) - return PTR_ERR(pll_p_clk); - - emc_clk = clk_get_sys("cpu", "emc"); - if (IS_ERR(emc_clk)) { - clk_put(cpu_clk); - return PTR_ERR(emc_clk); - } - - return cpufreq_register_driver(&tegra_cpufreq_driver); -} - -static void __exit tegra_cpufreq_exit(void) -{ - cpufreq_unregister_driver(&tegra_cpufreq_driver); - clk_put(emc_clk); - clk_put(cpu_clk); -} - - -MODULE_AUTHOR("Colin Cross "); -MODULE_DESCRIPTION("cpufreq driver for Nvidia Tegra2"); -MODULE_LICENSE("GPL"); -module_init(tegra_cpufreq_init); -module_exit(tegra_cpufreq_exit); -- 1.7.12.rc2.18.g61b472e -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/