cpufreq: pxa3xx: move cpufreq driver to drivers/cpufreq

This patch moves cpufreq driver of ARM based pxa3xx platform to drivers/cpufreq.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Eric Miao <eric.y.miao@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

3 files changed, 1 insertions, 258 deletions

diff --git a/arch/arm/mach-pxa/Makefile b/arch/arm/mach-pxa/Makefile
index 12c50055838..929e7008e2e 100644
--- a/arch/arm/mach-pxa/Makefile
+++ b/arch/arm/mach-pxa/Makefile
@@ -10,7 +10,6 @@ obj-$(CONFIG_PM)		+= pm.o sleep.o standby.o
 ifeq ($(CONFIG_CPU_FREQ),y)
 obj-$(CONFIG_PXA25x)		+= cpufreq-pxa2xx.o
 obj-$(CONFIG_PXA27x)		+= cpufreq-pxa2xx.o
-obj-$(CONFIG_PXA3xx)		+= cpufreq-pxa3xx.o
 endif
 
 # Generic drivers that other drivers may depend upon
diff --git a/arch/arm/mach-pxa/cpufreq-pxa3xx.c b/arch/arm/mach-pxa/cpufreq-pxa3xx.c
deleted file mode 100644
index 8c45b2b926a..00000000000
--- a/arch/arm/mach-pxa/cpufreq-pxa3xx.c
+++ /dev/null
@@ -1,257 +0,0 @@
-/*
- * linux/arch/arm/mach-pxa/cpufreq-pxa3xx.c
- *
- * Copyright (C) 2008 Marvell International Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/cpufreq.h>
-#include <linux/slab.h>
-#include <linux/io.h>
-
-#include <mach/pxa3xx-regs.h>
-
-#include "generic.h"
-
-#define HSS_104M	(0)
-#define HSS_156M	(1)
-#define HSS_208M	(2)
-#define HSS_312M	(3)
-
-#define SMCFS_78M	(0)
-#define SMCFS_104M	(2)
-#define SMCFS_208M	(5)
-
-#define SFLFS_104M	(0)
-#define SFLFS_156M	(1)
-#define SFLFS_208M	(2)
-#define SFLFS_312M	(3)
-
-#define XSPCLK_156M	(0)
-#define XSPCLK_NONE	(3)
-
-#define DMCFS_26M	(0)
-#define DMCFS_260M	(3)
-
-struct pxa3xx_freq_info {
-	unsigned int cpufreq_mhz;
-	unsigned int core_xl : 5;
-	unsigned int core_xn : 3;
-	unsigned int hss : 2;
-	unsigned int dmcfs : 2;
-	unsigned int smcfs : 3;
-	unsigned int sflfs : 2;
-	unsigned int df_clkdiv : 3;
-
-	int	vcc_core;	/* in mV */
-	int	vcc_sram;	/* in mV */
-};
-
-#define OP(cpufreq, _xl, _xn, _hss, _dmc, _smc, _sfl, _dfi, vcore, vsram) \
-{									\
-	.cpufreq_mhz	= cpufreq,					\
-	.core_xl	= _xl,						\
-	.core_xn	= _xn,						\
-	.hss		= HSS_##_hss##M,				\
-	.dmcfs		= DMCFS_##_dmc##M,				\
-	.smcfs		= SMCFS_##_smc##M,				\
-	.sflfs		= SFLFS_##_sfl##M,				\
-	.df_clkdiv	= _dfi,						\
-	.vcc_core	= vcore,					\
-	.vcc_sram	= vsram,					\
-}
-
-static struct pxa3xx_freq_info pxa300_freqs[] = {
-	/*  CPU XL XN  HSS DMEM SMEM SRAM DFI VCC_CORE VCC_SRAM */
-	OP(104,  8, 1, 104, 260,  78, 104, 3, 1000, 1100), /* 104MHz */
-	OP(208, 16, 1, 104, 260, 104, 156, 2, 1000, 1100), /* 208MHz */
-	OP(416, 16, 2, 156, 260, 104, 208, 2, 1100, 1200), /* 416MHz */
-	OP(624, 24, 2, 208, 260, 208, 312, 3, 1375, 1400), /* 624MHz */
-};
-
-static struct pxa3xx_freq_info pxa320_freqs[] = {
-	/*  CPU XL XN  HSS DMEM SMEM SRAM DFI VCC_CORE VCC_SRAM */
-	OP(104,  8, 1, 104, 260,  78, 104, 3, 1000, 1100), /* 104MHz */
-	OP(208, 16, 1, 104, 260, 104, 156, 2, 1000, 1100), /* 208MHz */
-	OP(416, 16, 2, 156, 260, 104, 208, 2, 1100, 1200), /* 416MHz */
-	OP(624, 24, 2, 208, 260, 208, 312, 3, 1375, 1400), /* 624MHz */
-	OP(806, 31, 2, 208, 260, 208, 312, 3, 1400, 1400), /* 806MHz */
-};
-
-static unsigned int pxa3xx_freqs_num;
-static struct pxa3xx_freq_info *pxa3xx_freqs;
-static struct cpufreq_frequency_table *pxa3xx_freqs_table;
-
-static int setup_freqs_table(struct cpufreq_policy *policy,
-			     struct pxa3xx_freq_info *freqs, int num)
-{
-	struct cpufreq_frequency_table *table;
-	int i;
-
-	table = kzalloc((num + 1) * sizeof(*table), GFP_KERNEL);
-	if (table == NULL)
-		return -ENOMEM;
-
-	for (i = 0; i < num; i++) {
-		table[i].index = i;
-		table[i].frequency = freqs[i].cpufreq_mhz * 1000;
-	}
-	table[num].index = i;
-	table[num].frequency = CPUFREQ_TABLE_END;
-
-	pxa3xx_freqs = freqs;
-	pxa3xx_freqs_num = num;
-	pxa3xx_freqs_table = table;
-
-	return cpufreq_frequency_table_cpuinfo(policy, table);
-}
-
-static void __update_core_freq(struct pxa3xx_freq_info *info)
-{
-	uint32_t mask = ACCR_XN_MASK | ACCR_XL_MASK;
-	uint32_t accr = ACCR;
-	uint32_t xclkcfg;
-
-	accr &= ~(ACCR_XN_MASK | ACCR_XL_MASK | ACCR_XSPCLK_MASK);
-	accr |= ACCR_XN(info->core_xn) | ACCR_XL(info->core_xl);
-
-	/* No clock until core PLL is re-locked */
-	accr |= ACCR_XSPCLK(XSPCLK_NONE);
-
-	xclkcfg = (info->core_xn == 2) ? 0x3 : 0x2;	/* turbo bit */
-
-	ACCR = accr;
-	__asm__("mcr p14, 0, %0, c6, c0, 0\n" : : "r"(xclkcfg));
-
-	while ((ACSR & mask) != (accr & mask))
-		cpu_relax();
-}
-
-static void __update_bus_freq(struct pxa3xx_freq_info *info)
-{
-	uint32_t mask;
-	uint32_t accr = ACCR;
-
-	mask = ACCR_SMCFS_MASK | ACCR_SFLFS_MASK | ACCR_HSS_MASK |
-		ACCR_DMCFS_MASK;
-
-	accr &= ~mask;
-	accr |= ACCR_SMCFS(info->smcfs) | ACCR_SFLFS(info->sflfs) |
-		ACCR_HSS(info->hss) | ACCR_DMCFS(info->dmcfs);
-
-	ACCR = accr;
-
-	while ((ACSR & mask) != (accr & mask))
-		cpu_relax();
-}
-
-static int pxa3xx_cpufreq_verify(struct cpufreq_policy *policy)
-{
-	return cpufreq_frequency_table_verify(policy, pxa3xx_freqs_table);
-}
-
-static unsigned int pxa3xx_cpufreq_get(unsigned int cpu)
-{
-	return pxa3xx_get_clk_frequency_khz(0);
-}
-
-static int pxa3xx_cpufreq_set(struct cpufreq_policy *policy,
-			      unsigned int target_freq,
-			      unsigned int relation)
-{
-	struct pxa3xx_freq_info *next;
-	struct cpufreq_freqs freqs;
-	unsigned long flags;
-	int idx;
-
-	if (policy->cpu != 0)
-		return -EINVAL;
-
-	/* Lookup the next frequency */
-	if (cpufreq_frequency_table_target(policy, pxa3xx_freqs_table,
-				target_freq, relation, &idx))
-		return -EINVAL;
-
-	next = &pxa3xx_freqs[idx];
-
-	freqs.old = policy->cur;
-	freqs.new = next->cpufreq_mhz * 1000;
-
-	pr_debug("CPU frequency from %d MHz to %d MHz%s\n",
-			freqs.old / 1000, freqs.new / 1000,
-			(freqs.old == freqs.new) ? " (skipped)" : "");
-
-	if (freqs.old == target_freq)
-		return 0;
-
-	cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
-	local_irq_save(flags);
-	__update_core_freq(next);
-	__update_bus_freq(next);
-	local_irq_restore(flags);
-
-	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
-
-	return 0;
-}
-
-static int pxa3xx_cpufreq_init(struct cpufreq_policy *policy)
-{
-	int ret = -EINVAL;
-
-	/* set default policy and cpuinfo */
-	policy->cpuinfo.min_freq = 104000;
-	policy->cpuinfo.max_freq = (cpu_is_pxa320()) ? 806000 : 624000;
-	policy->cpuinfo.transition_latency = 1000; /* FIXME: 1 ms, assumed */
-	policy->max = pxa3xx_get_clk_frequency_khz(0);
-	policy->cur = policy->min = policy->max;
-
-	if (cpu_is_pxa300() || cpu_is_pxa310())
-		ret = setup_freqs_table(policy, ARRAY_AND_SIZE(pxa300_freqs));
-
-	if (cpu_is_pxa320())
-		ret = setup_freqs_table(policy, ARRAY_AND_SIZE(pxa320_freqs));
-
-	if (ret) {
-		pr_err("failed to setup frequency table\n");
-		return ret;
-	}
-
-	pr_info("CPUFREQ support for PXA3xx initialized\n");
-	return 0;
-}
-
-static struct cpufreq_driver pxa3xx_cpufreq_driver = {
-	.verify		= pxa3xx_cpufreq_verify,
-	.target		= pxa3xx_cpufreq_set,
-	.init		= pxa3xx_cpufreq_init,
-	.get		= pxa3xx_cpufreq_get,
-	.name		= "pxa3xx-cpufreq",
-};
-
-static int __init cpufreq_init(void)
-{
-	if (cpu_is_pxa3xx())
-		return cpufreq_register_driver(&pxa3xx_cpufreq_driver);
-
-	return 0;
-}
-module_init(cpufreq_init);
-
-static void __exit cpufreq_exit(void)
-{
-	cpufreq_unregister_driver(&pxa3xx_cpufreq_driver);
-}
-module_exit(cpufreq_exit);
-
-MODULE_DESCRIPTION("CPU frequency scaling driver for PXA3xx");
-MODULE_LICENSE("GPL");
diff --git a/arch/arm/mach-pxa/include/mach/generic.h b/arch/arm/mach-pxa/include/mach/generic.h
new file mode 100644
index 00000000000..665542e0c9e
--- /dev/null
+++ b/arch/arm/mach-pxa/include/mach/generic.h
@@ -0,0 +1 @@
+#include "../../generic.h"