From 731e0cc639364646d36981d90ab0b6af12b8face Mon Sep 17 00:00:00 2001 From: Santosh Shilimkar Date: Wed, 11 Aug 2010 17:02:43 -0700 Subject: [PATCH] cpufreq: OMAP: cleanup for multi-SoC support, move into drivers/cpufreq Move OMAP cpufreq driver from arch/arm/mach-omap2 into drivers/cpufreq, along with a few cleanups: - generalize support for better handling of different SoCs in the OMAP - use OPP layer instead of OMAP clock internals for frequency table init Signed-off-by: Santosh Shilimkar [khilman@ti.com: move to drivers] Signed-off-by: Kevin Hilman --- arch/arm/plat-omap/Makefile | 1 - drivers/cpufreq/Makefile | 1 + .../cpufreq/omap-cpufreq.c | 69 ++++++++++++------- 3 files changed, 44 insertions(+), 27 deletions(-) rename arch/arm/plat-omap/cpu-omap.c => drivers/cpufreq/omap-cpufreq.c (77%) diff --git a/arch/arm/plat-omap/Makefile b/arch/arm/plat-omap/Makefile index 985262242f25..a53eca33627f 100644 --- a/arch/arm/plat-omap/Makefile +++ b/arch/arm/plat-omap/Makefile @@ -19,7 +19,6 @@ obj-$(CONFIG_ARCH_OMAP4) += omap_device.o obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o -obj-$(CONFIG_CPU_FREQ) += cpu-omap.o obj-$(CONFIG_OMAP_DM_TIMER) += dmtimer.o obj-$(CONFIG_OMAP_DEBUG_DEVICES) += debug-devices.o obj-$(CONFIG_OMAP_DEBUG_LEDS) += debug-leds.o diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index a48bc02cd765..ce75fcbcca4f 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -43,6 +43,7 @@ obj-$(CONFIG_UX500_SOC_DB8500) += db8500-cpufreq.o obj-$(CONFIG_ARM_S3C64XX_CPUFREQ) += s3c64xx-cpufreq.o obj-$(CONFIG_ARM_S5PV210_CPUFREQ) += s5pv210-cpufreq.o obj-$(CONFIG_ARM_EXYNOS4210_CPUFREQ) += exynos4210-cpufreq.o +obj-$(CONFIG_ARCH_OMAP2PLUS) += omap-cpufreq.o ################################################################################## # PowerPC platform drivers diff --git a/arch/arm/plat-omap/cpu-omap.c b/drivers/cpufreq/omap-cpufreq.c similarity index 77% rename from arch/arm/plat-omap/cpu-omap.c rename to drivers/cpufreq/omap-cpufreq.c index da4f68dbba1d..a6b2be7ea5a9 100644 --- a/arch/arm/plat-omap/cpu-omap.c +++ b/drivers/cpufreq/omap-cpufreq.c @@ -1,6 +1,4 @@ /* - * linux/arch/arm/plat-omap/cpu-omap.c - * * CPU frequency scaling for OMAP * * Copyright (C) 2005 Nokia Corporation @@ -8,6 +6,9 @@ * * Based on cpu-sa1110.c, Copyright (C) 2001 Russell King * + * Copyright (C) 2007-2011 Texas Instruments, Inc. + * - OMAP3/4 support by Rajendra Nayak, Santosh Shilimkar + * * 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. @@ -21,25 +22,22 @@ #include #include #include +#include -#include -#include #include +#include -#define VERY_HI_RATE 900000000 +#include +#include +#include -static struct cpufreq_frequency_table *freq_table; +#include -#ifdef CONFIG_ARCH_OMAP1 -#define MPU_CLK "mpu" -#else -#define MPU_CLK "virt_prcm_set" -#endif +#define VERY_HI_RATE 900000000 +static struct cpufreq_frequency_table *freq_table; static struct clk *mpu_clk; -/* TODO: Add support for SDRAM timing changes */ - static int omap_verify_speed(struct cpufreq_policy *policy) { if (freq_table) @@ -73,8 +71,8 @@ static int omap_target(struct cpufreq_policy *policy, unsigned int target_freq, unsigned int relation) { - struct cpufreq_freqs freqs; int ret = 0; + struct cpufreq_freqs freqs; /* Ensure desired rate is within allowed range. Some govenors * (ondemand) will just pass target_freq=0 to get the minimum. */ @@ -91,11 +89,13 @@ static int omap_target(struct cpufreq_policy *policy, return ret; cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); + #ifdef CONFIG_CPU_FREQ_DEBUG - printk(KERN_DEBUG "cpufreq-omap: transition: %u --> %u\n", - freqs.old, freqs.new); + pr_info("cpufreq-omap: transition: %u --> %u\n", freqs.old, freqs.new); #endif + ret = clk_set_rate(mpu_clk, freqs.new * 1000); + cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); return ret; @@ -104,8 +104,15 @@ static int omap_target(struct cpufreq_policy *policy, static int __cpuinit omap_cpu_init(struct cpufreq_policy *policy) { int result = 0; + struct device *mpu_dev; + + if (cpu_is_omap24xx()) + mpu_clk = clk_get(NULL, "virt_prcm_set"); + else if (cpu_is_omap34xx()) + mpu_clk = clk_get(NULL, "dpll1_ck"); + else if (cpu_is_omap44xx()) + mpu_clk = clk_get(NULL, "dpll_mpu_ck"); - mpu_clk = clk_get(NULL, MPU_CLK); if (IS_ERR(mpu_clk)) return PTR_ERR(mpu_clk); @@ -114,7 +121,13 @@ static int __cpuinit omap_cpu_init(struct cpufreq_policy *policy) policy->cur = policy->min = policy->max = omap_getspeed(0); - clk_init_cpufreq_table(&freq_table); + mpu_dev = omap2_get_mpuss_device(); + if (!mpu_dev) { + pr_warning("%s: unable to get the mpu device\n", __func__); + return -EINVAL; + } + opp_init_cpufreq_table(mpu_dev, &freq_table); + if (freq_table) { result = cpufreq_frequency_table_cpuinfo(policy, freq_table); if (!result) @@ -126,6 +139,10 @@ static int __cpuinit omap_cpu_init(struct cpufreq_policy *policy) VERY_HI_RATE) / 1000; } + policy->min = policy->cpuinfo.min_freq; + policy->max = policy->cpuinfo.max_freq; + policy->cur = omap_getspeed(0); + /* FIXME: what's the actual transition time? */ policy->cpuinfo.transition_latency = 300 * 1000; @@ -160,12 +177,12 @@ static int __init omap_cpufreq_init(void) return cpufreq_register_driver(&omap_driver); } -arch_initcall(omap_cpufreq_init); - -/* - * if ever we want to remove this, upon cleanup call: - * - * cpufreq_unregister_driver() - * cpufreq_frequency_table_put_attr() - */ +static void __exit omap_cpufreq_exit(void) +{ + cpufreq_unregister_driver(&omap_driver); +} +MODULE_DESCRIPTION("cpufreq driver for OMAP SoCs"); +MODULE_LICENSE("GPL"); +module_init(omap_cpufreq_init); +module_exit(omap_cpufreq_exit); -- 2.39.5