obj-$(CONFIG_MACH_OMAPL138_HAWKBOARD) += board-omapl138-hawk.o
# Power Management
-obj-$(CONFIG_CPU_FREQ) += cpufreq.o
obj-$(CONFIG_CPU_IDLE) += cpuidle.o
obj-$(CONFIG_SUSPEND) += pm.o sleep.o
obj-$(CONFIG_HAVE_CLK) += pm_domain.o
+++ /dev/null
-/*
- * CPU frequency scaling for DaVinci
- *
- * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
- *
- * Based on linux/arch/arm/plat-omap/cpu-omap.c. Original Copyright follows:
- *
- * Copyright (C) 2005 Nokia Corporation
- * Written by Tony Lindgren <tony@atomide.com>
- *
- * Based on cpu-sa1110.c, Copyright (C) 2001 Russell King
- *
- * Copyright (C) 2007-2008 Texas Instruments, Inc.
- * Updated to support OMAP3
- * Rajendra Nayak <rnayak@ti.com>
- *
- * 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.
- */
-#include <linux/types.h>
-#include <linux/cpufreq.h>
-#include <linux/init.h>
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/platform_device.h>
-#include <linux/export.h>
-
-#include <mach/hardware.h>
-#include <mach/cpufreq.h>
-#include <mach/common.h>
-
-#include "clock.h"
-
-struct davinci_cpufreq {
- struct device *dev;
- struct clk *armclk;
- struct clk *asyncclk;
- unsigned long asyncrate;
-};
-static struct davinci_cpufreq cpufreq;
-
-static int davinci_verify_speed(struct cpufreq_policy *policy)
-{
- struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
- struct cpufreq_frequency_table *freq_table = pdata->freq_table;
- struct clk *armclk = cpufreq.armclk;
-
- if (freq_table)
- return cpufreq_frequency_table_verify(policy, freq_table);
-
- if (policy->cpu)
- return -EINVAL;
-
- cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
- policy->cpuinfo.max_freq);
-
- policy->min = clk_round_rate(armclk, policy->min * 1000) / 1000;
- policy->max = clk_round_rate(armclk, policy->max * 1000) / 1000;
- cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
- policy->cpuinfo.max_freq);
- return 0;
-}
-
-static unsigned int davinci_getspeed(unsigned int cpu)
-{
- if (cpu)
- return 0;
-
- return clk_get_rate(cpufreq.armclk) / 1000;
-}
-
-static int davinci_target(struct cpufreq_policy *policy,
- unsigned int target_freq, unsigned int relation)
-{
- int ret = 0;
- unsigned int idx;
- struct cpufreq_freqs freqs;
- struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
- struct clk *armclk = cpufreq.armclk;
-
- freqs.old = davinci_getspeed(0);
- freqs.new = clk_round_rate(armclk, target_freq * 1000) / 1000;
-
- if (freqs.old == freqs.new)
- return ret;
-
- dev_dbg(cpufreq.dev, "transition: %u --> %u\n", freqs.old, freqs.new);
-
- ret = cpufreq_frequency_table_target(policy, pdata->freq_table,
- freqs.new, relation, &idx);
- if (ret)
- return -EINVAL;
-
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
- /* if moving to higher frequency, up the voltage beforehand */
- if (pdata->set_voltage && freqs.new > freqs.old) {
- ret = pdata->set_voltage(idx);
- if (ret)
- goto out;
- }
-
- ret = clk_set_rate(armclk, idx);
- if (ret)
- goto out;
-
- if (cpufreq.asyncclk) {
- ret = clk_set_rate(cpufreq.asyncclk, cpufreq.asyncrate);
- if (ret)
- goto out;
- }
-
- /* if moving to lower freq, lower the voltage after lowering freq */
- if (pdata->set_voltage && freqs.new < freqs.old)
- pdata->set_voltage(idx);
-
-out:
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
-
- return ret;
-}
-
-static int davinci_cpu_init(struct cpufreq_policy *policy)
-{
- int result = 0;
- struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
- struct cpufreq_frequency_table *freq_table = pdata->freq_table;
-
- if (policy->cpu != 0)
- return -EINVAL;
-
- /* Finish platform specific initialization */
- if (pdata->init) {
- result = pdata->init();
- if (result)
- return result;
- }
-
- policy->cur = davinci_getspeed(0);
-
- result = cpufreq_frequency_table_cpuinfo(policy, freq_table);
- if (result) {
- pr_err("%s: cpufreq_frequency_table_cpuinfo() failed",
- __func__);
- return result;
- }
-
- cpufreq_frequency_table_get_attr(freq_table, policy->cpu);
-
- /*
- * Time measurement across the target() function yields ~1500-1800us
- * time taken with no drivers on notification list.
- * Setting the latency to 2000 us to accommodate addition of drivers
- * to pre/post change notification list.
- */
- policy->cpuinfo.transition_latency = 2000 * 1000;
- return 0;
-}
-
-static int davinci_cpu_exit(struct cpufreq_policy *policy)
-{
- cpufreq_frequency_table_put_attr(policy->cpu);
- return 0;
-}
-
-static struct freq_attr *davinci_cpufreq_attr[] = {
- &cpufreq_freq_attr_scaling_available_freqs,
- NULL,
-};
-
-static struct cpufreq_driver davinci_driver = {
- .flags = CPUFREQ_STICKY,
- .verify = davinci_verify_speed,
- .target = davinci_target,
- .get = davinci_getspeed,
- .init = davinci_cpu_init,
- .exit = davinci_cpu_exit,
- .name = "davinci",
- .attr = davinci_cpufreq_attr,
-};
-
-static int __init davinci_cpufreq_probe(struct platform_device *pdev)
-{
- struct davinci_cpufreq_config *pdata = pdev->dev.platform_data;
- struct clk *asyncclk;
-
- if (!pdata)
- return -EINVAL;
- if (!pdata->freq_table)
- return -EINVAL;
-
- cpufreq.dev = &pdev->dev;
-
- cpufreq.armclk = clk_get(NULL, "arm");
- if (IS_ERR(cpufreq.armclk)) {
- dev_err(cpufreq.dev, "Unable to get ARM clock\n");
- return PTR_ERR(cpufreq.armclk);
- }
-
- asyncclk = clk_get(cpufreq.dev, "async");
- if (!IS_ERR(asyncclk)) {
- cpufreq.asyncclk = asyncclk;
- cpufreq.asyncrate = clk_get_rate(asyncclk);
- }
-
- return cpufreq_register_driver(&davinci_driver);
-}
-
-static int __exit davinci_cpufreq_remove(struct platform_device *pdev)
-{
- clk_put(cpufreq.armclk);
-
- if (cpufreq.asyncclk)
- clk_put(cpufreq.asyncclk);
-
- return cpufreq_unregister_driver(&davinci_driver);
-}
-
-static struct platform_driver davinci_cpufreq_driver = {
- .driver = {
- .name = "cpufreq-davinci",
- .owner = THIS_MODULE,
- },
- .remove = __exit_p(davinci_cpufreq_remove),
-};
-
-int __init davinci_cpufreq_init(void)
-{
- return platform_driver_probe(&davinci_cpufreq_driver,
- davinci_cpufreq_probe);
-}
-
# LITTLE drivers, so that it is probed last.
obj-$(CONFIG_ARM_DT_BL_CPUFREQ) += arm_big_little_dt.o
+obj-$(CONFIG_ARCH_DAVINCI_DA850) += davinci-cpufreq.o
obj-$(CONFIG_UX500_SOC_DB8500) += dbx500-cpufreq.o
obj-$(CONFIG_ARM_EXYNOS_CPUFREQ) += exynos-cpufreq.o
obj-$(CONFIG_ARM_EXYNOS4210_CPUFREQ) += exynos4210-cpufreq.o
--- /dev/null
+/*
+ * CPU frequency scaling for DaVinci
+ *
+ * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Based on linux/arch/arm/plat-omap/cpu-omap.c. Original Copyright follows:
+ *
+ * Copyright (C) 2005 Nokia Corporation
+ * Written by Tony Lindgren <tony@atomide.com>
+ *
+ * Based on cpu-sa1110.c, Copyright (C) 2001 Russell King
+ *
+ * Copyright (C) 2007-2008 Texas Instruments, Inc.
+ * Updated to support OMAP3
+ * Rajendra Nayak <rnayak@ti.com>
+ *
+ * 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.
+ */
+#include <linux/types.h>
+#include <linux/cpufreq.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+#include <linux/export.h>
+
+#include <mach/hardware.h>
+#include <mach/cpufreq.h>
+#include <mach/common.h>
+
+struct davinci_cpufreq {
+ struct device *dev;
+ struct clk *armclk;
+ struct clk *asyncclk;
+ unsigned long asyncrate;
+};
+static struct davinci_cpufreq cpufreq;
+
+static int davinci_verify_speed(struct cpufreq_policy *policy)
+{
+ struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
+ struct cpufreq_frequency_table *freq_table = pdata->freq_table;
+ struct clk *armclk = cpufreq.armclk;
+
+ if (freq_table)
+ return cpufreq_frequency_table_verify(policy, freq_table);
+
+ if (policy->cpu)
+ return -EINVAL;
+
+ cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
+ policy->cpuinfo.max_freq);
+
+ policy->min = clk_round_rate(armclk, policy->min * 1000) / 1000;
+ policy->max = clk_round_rate(armclk, policy->max * 1000) / 1000;
+ cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
+ policy->cpuinfo.max_freq);
+ return 0;
+}
+
+static unsigned int davinci_getspeed(unsigned int cpu)
+{
+ if (cpu)
+ return 0;
+
+ return clk_get_rate(cpufreq.armclk) / 1000;
+}
+
+static int davinci_target(struct cpufreq_policy *policy,
+ unsigned int target_freq, unsigned int relation)
+{
+ int ret = 0;
+ unsigned int idx;
+ struct cpufreq_freqs freqs;
+ struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
+ struct clk *armclk = cpufreq.armclk;
+
+ freqs.old = davinci_getspeed(0);
+ freqs.new = clk_round_rate(armclk, target_freq * 1000) / 1000;
+
+ if (freqs.old == freqs.new)
+ return ret;
+
+ dev_dbg(cpufreq.dev, "transition: %u --> %u\n", freqs.old, freqs.new);
+
+ ret = cpufreq_frequency_table_target(policy, pdata->freq_table,
+ freqs.new, relation, &idx);
+ if (ret)
+ return -EINVAL;
+
+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
+
+ /* if moving to higher frequency, up the voltage beforehand */
+ if (pdata->set_voltage && freqs.new > freqs.old) {
+ ret = pdata->set_voltage(idx);
+ if (ret)
+ goto out;
+ }
+
+ ret = clk_set_rate(armclk, idx);
+ if (ret)
+ goto out;
+
+ if (cpufreq.asyncclk) {
+ ret = clk_set_rate(cpufreq.asyncclk, cpufreq.asyncrate);
+ if (ret)
+ goto out;
+ }
+
+ /* if moving to lower freq, lower the voltage after lowering freq */
+ if (pdata->set_voltage && freqs.new < freqs.old)
+ pdata->set_voltage(idx);
+
+out:
+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
+
+ return ret;
+}
+
+static int davinci_cpu_init(struct cpufreq_policy *policy)
+{
+ int result = 0;
+ struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
+ struct cpufreq_frequency_table *freq_table = pdata->freq_table;
+
+ if (policy->cpu != 0)
+ return -EINVAL;
+
+ /* Finish platform specific initialization */
+ if (pdata->init) {
+ result = pdata->init();
+ if (result)
+ return result;
+ }
+
+ policy->cur = davinci_getspeed(0);
+
+ result = cpufreq_frequency_table_cpuinfo(policy, freq_table);
+ if (result) {
+ pr_err("%s: cpufreq_frequency_table_cpuinfo() failed",
+ __func__);
+ return result;
+ }
+
+ cpufreq_frequency_table_get_attr(freq_table, policy->cpu);
+
+ /*
+ * Time measurement across the target() function yields ~1500-1800us
+ * time taken with no drivers on notification list.
+ * Setting the latency to 2000 us to accommodate addition of drivers
+ * to pre/post change notification list.
+ */
+ policy->cpuinfo.transition_latency = 2000 * 1000;
+ return 0;
+}
+
+static int davinci_cpu_exit(struct cpufreq_policy *policy)
+{
+ cpufreq_frequency_table_put_attr(policy->cpu);
+ return 0;
+}
+
+static struct freq_attr *davinci_cpufreq_attr[] = {
+ &cpufreq_freq_attr_scaling_available_freqs,
+ NULL,
+};
+
+static struct cpufreq_driver davinci_driver = {
+ .flags = CPUFREQ_STICKY,
+ .verify = davinci_verify_speed,
+ .target = davinci_target,
+ .get = davinci_getspeed,
+ .init = davinci_cpu_init,
+ .exit = davinci_cpu_exit,
+ .name = "davinci",
+ .attr = davinci_cpufreq_attr,
+};
+
+static int __init davinci_cpufreq_probe(struct platform_device *pdev)
+{
+ struct davinci_cpufreq_config *pdata = pdev->dev.platform_data;
+ struct clk *asyncclk;
+
+ if (!pdata)
+ return -EINVAL;
+ if (!pdata->freq_table)
+ return -EINVAL;
+
+ cpufreq.dev = &pdev->dev;
+
+ cpufreq.armclk = clk_get(NULL, "arm");
+ if (IS_ERR(cpufreq.armclk)) {
+ dev_err(cpufreq.dev, "Unable to get ARM clock\n");
+ return PTR_ERR(cpufreq.armclk);
+ }
+
+ asyncclk = clk_get(cpufreq.dev, "async");
+ if (!IS_ERR(asyncclk)) {
+ cpufreq.asyncclk = asyncclk;
+ cpufreq.asyncrate = clk_get_rate(asyncclk);
+ }
+
+ return cpufreq_register_driver(&davinci_driver);
+}
+
+static int __exit davinci_cpufreq_remove(struct platform_device *pdev)
+{
+ clk_put(cpufreq.armclk);
+
+ if (cpufreq.asyncclk)
+ clk_put(cpufreq.asyncclk);
+
+ return cpufreq_unregister_driver(&davinci_driver);
+}
+
+static struct platform_driver davinci_cpufreq_driver = {
+ .driver = {
+ .name = "cpufreq-davinci",
+ .owner = THIS_MODULE,
+ },
+ .remove = __exit_p(davinci_cpufreq_remove),
+};
+
+int __init davinci_cpufreq_init(void)
+{
+ return platform_driver_probe(&davinci_cpufreq_driver,
+ davinci_cpufreq_probe);
+}
+
projects / openwrt / staging / blogic.git / commitdiff