cpufreq: davinci: move cpufreq driver to drivers/cpufreq

This patch moves cpufreq driver of ARM based davinci platform to drivers/cpufreq. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Sekhar Nori <nsekhar@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

cpufreq: davinci: move cpufreq driver to drivers/cpufreq
This patch moves cpufreq driver of ARM based davinci platform to drivers/cpufreq. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Sekhar Nori <nsekhar@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Viresh Kumar · Rafael J. Wysocki
1 parent ceff98e333
Showing 4 changed files with 232 additions and 234 deletions Side-by-side Diff
arch/arm/mach-davinci/Makefile
arch/arm/mach-davinci/cpufreq.c
drivers/cpufreq/Makefile
drivers/cpufreq/davinci-cpufreq.c
@@ -37,7 +37,6 @@
 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
-/*
- * 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);
-}
@@ -49,6 +49,7 @@
 # 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
+/*
+ * 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);
+}
...	...	@@ -37,7 +37,6 @@
37	37	obj-$(CONFIG_MACH_OMAPL138_HAWKBOARD) += board-omapl138-hawk.o
38	38
39	39	# Power Management
40		-obj-$(CONFIG_CPU_FREQ) += cpufreq.o
41	40	obj-$(CONFIG_CPU_IDLE) += cpuidle.o
42	41	obj-$(CONFIG_SUSPEND) += pm.o sleep.o
43	42	obj-$(CONFIG_HAVE_CLK) += pm_domain.o
1		-/*
2		- * CPU frequency scaling for DaVinci
3		- *
4		- * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
5		- *
6		- * Based on linux/arch/arm/plat-omap/cpu-omap.c. Original Copyright follows:
7		- *
8		- * Copyright (C) 2005 Nokia Corporation
9		- * Written by Tony Lindgren <tony@atomide.com>
10		- *
11		- * Based on cpu-sa1110.c, Copyright (C) 2001 Russell King
12		- *
13		- * Copyright (C) 2007-2008 Texas Instruments, Inc.
14		- * Updated to support OMAP3
15		- * Rajendra Nayak <rnayak@ti.com>
16		- *
17		- * This program is free software; you can redistribute it and/or modify
18		- * it under the terms of the GNU General Public License version 2 as
19		- * published by the Free Software Foundation.
20		- */
21		-#include <linux/types.h>
22		-#include <linux/cpufreq.h>
23		-#include <linux/init.h>
24		-#include <linux/err.h>
25		-#include <linux/clk.h>
26		-#include <linux/platform_device.h>
27		-#include <linux/export.h>
28		-
29		-#include <mach/hardware.h>
30		-#include <mach/cpufreq.h>
31		-#include <mach/common.h>
32		-
33		-#include "clock.h"
34		-
35		-struct davinci_cpufreq {
36		- struct device *dev;
37		- struct clk *armclk;
38		- struct clk *asyncclk;
39		- unsigned long asyncrate;
40		-};
41		-static struct davinci_cpufreq cpufreq;
42		-
43		-static int davinci_verify_speed(struct cpufreq_policy *policy)
44		-{
45		- struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
46		- struct cpufreq_frequency_table *freq_table = pdata->freq_table;
47		- struct clk *armclk = cpufreq.armclk;
48		-
49		- if (freq_table)
50		- return cpufreq_frequency_table_verify(policy, freq_table);
51		-
52		- if (policy->cpu)
53		- return -EINVAL;
54		-
55		- cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
56		- policy->cpuinfo.max_freq);
57		-
58		- policy->min = clk_round_rate(armclk, policy->min * 1000) / 1000;
59		- policy->max = clk_round_rate(armclk, policy->max * 1000) / 1000;
60		- cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
61		- policy->cpuinfo.max_freq);
62		- return 0;
63		-}
64		-
65		-static unsigned int davinci_getspeed(unsigned int cpu)
66		-{
67		- if (cpu)
68		- return 0;
69		-
70		- return clk_get_rate(cpufreq.armclk) / 1000;
71		-}
72		-
73		-static int davinci_target(struct cpufreq_policy *policy,
74		- unsigned int target_freq, unsigned int relation)
75		-{
76		- int ret = 0;
77		- unsigned int idx;
78		- struct cpufreq_freqs freqs;
79		- struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
80		- struct clk *armclk = cpufreq.armclk;
81		-
82		- freqs.old = davinci_getspeed(0);
83		- freqs.new = clk_round_rate(armclk, target_freq * 1000) / 1000;
84		-
85		- if (freqs.old == freqs.new)
86		- return ret;
87		-
88		- dev_dbg(cpufreq.dev, "transition: %u --> %u\n", freqs.old, freqs.new);
89		-
90		- ret = cpufreq_frequency_table_target(policy, pdata->freq_table,
91		- freqs.new, relation, &idx);
92		- if (ret)
93		- return -EINVAL;
94		-
95		- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
96		-
97		- /* if moving to higher frequency, up the voltage beforehand */
98		- if (pdata->set_voltage && freqs.new > freqs.old) {
99		- ret = pdata->set_voltage(idx);
100		- if (ret)
101		- goto out;
102		- }
103		-
104		- ret = clk_set_rate(armclk, idx);
105		- if (ret)
106		- goto out;
107		-
108		- if (cpufreq.asyncclk) {
109		- ret = clk_set_rate(cpufreq.asyncclk, cpufreq.asyncrate);
110		- if (ret)
111		- goto out;
112		- }
113		-
114		- /* if moving to lower freq, lower the voltage after lowering freq */
115		- if (pdata->set_voltage && freqs.new < freqs.old)
116		- pdata->set_voltage(idx);
117		-
118		-out:
119		- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
120		-
121		- return ret;
122		-}
123		-
124		-static int davinci_cpu_init(struct cpufreq_policy *policy)
125		-{
126		- int result = 0;
127		- struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
128		- struct cpufreq_frequency_table *freq_table = pdata->freq_table;
129		-
130		- if (policy->cpu != 0)
131		- return -EINVAL;
132		-
133		- /* Finish platform specific initialization */
134		- if (pdata->init) {
135		- result = pdata->init();
136		- if (result)
137		- return result;
138		- }
139		-
140		- policy->cur = davinci_getspeed(0);
141		-
142		- result = cpufreq_frequency_table_cpuinfo(policy, freq_table);
143		- if (result) {
144		- pr_err("%s: cpufreq_frequency_table_cpuinfo() failed",
145		- __func__);
146		- return result;
147		- }
148		-
149		- cpufreq_frequency_table_get_attr(freq_table, policy->cpu);
150		-
151		- /*
152		- * Time measurement across the target() function yields ~1500-1800us
153		- * time taken with no drivers on notification list.
154		- * Setting the latency to 2000 us to accommodate addition of drivers
155		- * to pre/post change notification list.
156		- */
157		- policy->cpuinfo.transition_latency = 2000 * 1000;
158		- return 0;
159		-}
160		-
161		-static int davinci_cpu_exit(struct cpufreq_policy *policy)
162		-{
163		- cpufreq_frequency_table_put_attr(policy->cpu);
164		- return 0;
165		-}
166		-
167		-static struct freq_attr *davinci_cpufreq_attr[] = {
168		- &cpufreq_freq_attr_scaling_available_freqs,
169		- NULL,
170		-};
171		-
172		-static struct cpufreq_driver davinci_driver = {
173		- .flags = CPUFREQ_STICKY,
174		- .verify = davinci_verify_speed,
175		- .target = davinci_target,
176		- .get = davinci_getspeed,
177		- .init = davinci_cpu_init,
178		- .exit = davinci_cpu_exit,
179		- .name = "davinci",
180		- .attr = davinci_cpufreq_attr,
181		-};
182		-
183		-static int __init davinci_cpufreq_probe(struct platform_device *pdev)
184		-{
185		- struct davinci_cpufreq_config *pdata = pdev->dev.platform_data;
186		- struct clk *asyncclk;
187		-
188		- if (!pdata)
189		- return -EINVAL;
190		- if (!pdata->freq_table)
191		- return -EINVAL;
192		-
193		- cpufreq.dev = &pdev->dev;
194		-
195		- cpufreq.armclk = clk_get(NULL, "arm");
196		- if (IS_ERR(cpufreq.armclk)) {
197		- dev_err(cpufreq.dev, "Unable to get ARM clock\n");
198		- return PTR_ERR(cpufreq.armclk);
199		- }
200		-
201		- asyncclk = clk_get(cpufreq.dev, "async");
202		- if (!IS_ERR(asyncclk)) {
203		- cpufreq.asyncclk = asyncclk;
204		- cpufreq.asyncrate = clk_get_rate(asyncclk);
205		- }
206		-
207		- return cpufreq_register_driver(&davinci_driver);
208		-}
209		-
210		-static int __exit davinci_cpufreq_remove(struct platform_device *pdev)
211		-{
212		- clk_put(cpufreq.armclk);
213		-
214		- if (cpufreq.asyncclk)
215		- clk_put(cpufreq.asyncclk);
216		-
217		- return cpufreq_unregister_driver(&davinci_driver);
218		-}
219		-
220		-static struct platform_driver davinci_cpufreq_driver = {
221		- .driver = {
222		- .name = "cpufreq-davinci",
223		- .owner = THIS_MODULE,
224		- },
225		- .remove = __exit_p(davinci_cpufreq_remove),
226		-};
227		-
228		-int __init davinci_cpufreq_init(void)
229		-{
230		- return platform_driver_probe(&davinci_cpufreq_driver,
231		- davinci_cpufreq_probe);
232		-}
...	...	@@ -49,6 +49,7 @@
49	49	# LITTLE drivers, so that it is probed last.
50	50	obj-$(CONFIG_ARM_DT_BL_CPUFREQ) += arm_big_little_dt.o
51	51
	52	+obj-$(CONFIG_ARCH_DAVINCI_DA850) += davinci-cpufreq.o
52	53	obj-$(CONFIG_UX500_SOC_DB8500) += dbx500-cpufreq.o
53	54	obj-$(CONFIG_ARM_EXYNOS_CPUFREQ) += exynos-cpufreq.o
54	55	obj-$(CONFIG_ARM_EXYNOS4210_CPUFREQ) += exynos4210-cpufreq.o
	1	+/*
	2	+ * CPU frequency scaling for DaVinci
	3	+ *
	4	+ * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
	5	+ *
	6	+ * Based on linux/arch/arm/plat-omap/cpu-omap.c. Original Copyright follows:
	7	+ *
	8	+ * Copyright (C) 2005 Nokia Corporation
	9	+ * Written by Tony Lindgren <tony@atomide.com>
	10	+ *
	11	+ * Based on cpu-sa1110.c, Copyright (C) 2001 Russell King
	12	+ *
	13	+ * Copyright (C) 2007-2008 Texas Instruments, Inc.
	14	+ * Updated to support OMAP3
	15	+ * Rajendra Nayak <rnayak@ti.com>
	16	+ *
	17	+ * This program is free software; you can redistribute it and/or modify
	18	+ * it under the terms of the GNU General Public License version 2 as
	19	+ * published by the Free Software Foundation.
	20	+ */
	21	+#include <linux/types.h>
	22	+#include <linux/cpufreq.h>
	23	+#include <linux/init.h>
	24	+#include <linux/err.h>
	25	+#include <linux/clk.h>
	26	+#include <linux/platform_device.h>
	27	+#include <linux/export.h>
	28	+
	29	+#include <mach/hardware.h>
	30	+#include <mach/cpufreq.h>
	31	+#include <mach/common.h>
	32	+
	33	+struct davinci_cpufreq {
	34	+ struct device *dev;
	35	+ struct clk *armclk;
	36	+ struct clk *asyncclk;
	37	+ unsigned long asyncrate;
	38	+};
	39	+static struct davinci_cpufreq cpufreq;
	40	+
	41	+static int davinci_verify_speed(struct cpufreq_policy *policy)
	42	+{
	43	+ struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
	44	+ struct cpufreq_frequency_table *freq_table = pdata->freq_table;
	45	+ struct clk *armclk = cpufreq.armclk;
	46	+
	47	+ if (freq_table)
	48	+ return cpufreq_frequency_table_verify(policy, freq_table);
	49	+
	50	+ if (policy->cpu)
	51	+ return -EINVAL;
	52	+
	53	+ cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
	54	+ policy->cpuinfo.max_freq);
	55	+
	56	+ policy->min = clk_round_rate(armclk, policy->min * 1000) / 1000;
	57	+ policy->max = clk_round_rate(armclk, policy->max * 1000) / 1000;
	58	+ cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
	59	+ policy->cpuinfo.max_freq);
	60	+ return 0;
	61	+}
	62	+
	63	+static unsigned int davinci_getspeed(unsigned int cpu)
	64	+{
	65	+ if (cpu)
	66	+ return 0;
	67	+
	68	+ return clk_get_rate(cpufreq.armclk) / 1000;
	69	+}
	70	+
	71	+static int davinci_target(struct cpufreq_policy *policy,
	72	+ unsigned int target_freq, unsigned int relation)
	73	+{
	74	+ int ret = 0;
	75	+ unsigned int idx;
	76	+ struct cpufreq_freqs freqs;
	77	+ struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
	78	+ struct clk *armclk = cpufreq.armclk;
	79	+
	80	+ freqs.old = davinci_getspeed(0);
	81	+ freqs.new = clk_round_rate(armclk, target_freq * 1000) / 1000;
	82	+
	83	+ if (freqs.old == freqs.new)
	84	+ return ret;
	85	+
	86	+ dev_dbg(cpufreq.dev, "transition: %u --> %u\n", freqs.old, freqs.new);
	87	+
	88	+ ret = cpufreq_frequency_table_target(policy, pdata->freq_table,
	89	+ freqs.new, relation, &idx);
	90	+ if (ret)
	91	+ return -EINVAL;
	92	+
	93	+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
	94	+
	95	+ /* if moving to higher frequency, up the voltage beforehand */
	96	+ if (pdata->set_voltage && freqs.new > freqs.old) {
	97	+ ret = pdata->set_voltage(idx);
	98	+ if (ret)
	99	+ goto out;
	100	+ }
	101	+
	102	+ ret = clk_set_rate(armclk, idx);
	103	+ if (ret)
	104	+ goto out;
	105	+
	106	+ if (cpufreq.asyncclk) {
	107	+ ret = clk_set_rate(cpufreq.asyncclk, cpufreq.asyncrate);
	108	+ if (ret)
	109	+ goto out;
	110	+ }
	111	+
	112	+ /* if moving to lower freq, lower the voltage after lowering freq */
	113	+ if (pdata->set_voltage && freqs.new < freqs.old)
	114	+ pdata->set_voltage(idx);
	115	+
	116	+out:
	117	+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
	118	+
	119	+ return ret;
	120	+}
	121	+
	122	+static int davinci_cpu_init(struct cpufreq_policy *policy)
	123	+{
	124	+ int result = 0;
	125	+ struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
	126	+ struct cpufreq_frequency_table *freq_table = pdata->freq_table;
	127	+
	128	+ if (policy->cpu != 0)
	129	+ return -EINVAL;
	130	+
	131	+ /* Finish platform specific initialization */
	132	+ if (pdata->init) {
	133	+ result = pdata->init();
	134	+ if (result)
	135	+ return result;
	136	+ }
	137	+
	138	+ policy->cur = davinci_getspeed(0);
	139	+
	140	+ result = cpufreq_frequency_table_cpuinfo(policy, freq_table);
	141	+ if (result) {
	142	+ pr_err("%s: cpufreq_frequency_table_cpuinfo() failed",
	143	+ __func__);
	144	+ return result;
	145	+ }
	146	+
	147	+ cpufreq_frequency_table_get_attr(freq_table, policy->cpu);
	148	+
	149	+ /*
	150	+ * Time measurement across the target() function yields ~1500-1800us
	151	+ * time taken with no drivers on notification list.
	152	+ * Setting the latency to 2000 us to accommodate addition of drivers
	153	+ * to pre/post change notification list.
	154	+ */
	155	+ policy->cpuinfo.transition_latency = 2000 * 1000;
	156	+ return 0;
	157	+}
	158	+
	159	+static int davinci_cpu_exit(struct cpufreq_policy *policy)
	160	+{
	161	+ cpufreq_frequency_table_put_attr(policy->cpu);
	162	+ return 0;
	163	+}
	164	+
	165	+static struct freq_attr *davinci_cpufreq_attr[] = {
	166	+ &cpufreq_freq_attr_scaling_available_freqs,
	167	+ NULL,
	168	+};
	169	+
	170	+static struct cpufreq_driver davinci_driver = {
	171	+ .flags = CPUFREQ_STICKY,
	172	+ .verify = davinci_verify_speed,
	173	+ .target = davinci_target,
	174	+ .get = davinci_getspeed,
	175	+ .init = davinci_cpu_init,
	176	+ .exit = davinci_cpu_exit,
	177	+ .name = "davinci",
	178	+ .attr = davinci_cpufreq_attr,
	179	+};
	180	+
	181	+static int __init davinci_cpufreq_probe(struct platform_device *pdev)
	182	+{
	183	+ struct davinci_cpufreq_config *pdata = pdev->dev.platform_data;
	184	+ struct clk *asyncclk;
	185	+
	186	+ if (!pdata)
	187	+ return -EINVAL;
	188	+ if (!pdata->freq_table)
	189	+ return -EINVAL;
	190	+
	191	+ cpufreq.dev = &pdev->dev;
	192	+
	193	+ cpufreq.armclk = clk_get(NULL, "arm");
	194	+ if (IS_ERR(cpufreq.armclk)) {
	195	+ dev_err(cpufreq.dev, "Unable to get ARM clock\n");
	196	+ return PTR_ERR(cpufreq.armclk);
	197	+ }
	198	+
	199	+ asyncclk = clk_get(cpufreq.dev, "async");
	200	+ if (!IS_ERR(asyncclk)) {
	201	+ cpufreq.asyncclk = asyncclk;
	202	+ cpufreq.asyncrate = clk_get_rate(asyncclk);
	203	+ }
	204	+
	205	+ return cpufreq_register_driver(&davinci_driver);
	206	+}
	207	+
	208	+static int __exit davinci_cpufreq_remove(struct platform_device *pdev)
	209	+{
	210	+ clk_put(cpufreq.armclk);
	211	+
	212	+ if (cpufreq.asyncclk)
	213	+ clk_put(cpufreq.asyncclk);
	214	+
	215	+ return cpufreq_unregister_driver(&davinci_driver);
	216	+}
	217	+
	218	+static struct platform_driver davinci_cpufreq_driver = {
	219	+ .driver = {
	220	+ .name = "cpufreq-davinci",
	221	+ .owner = THIS_MODULE,
	222	+ },
	223	+ .remove = __exit_p(davinci_cpufreq_remove),
	224	+};
	225	+
	226	+int __init davinci_cpufreq_init(void)
	227	+{
	228	+ return platform_driver_probe(&davinci_cpufreq_driver,
	229	+ davinci_cpufreq_probe);
	230	+}