diff options
Diffstat (limited to 'recipes/linux/linux-omap2-git/beagleboard/01-omap3-cpufreq.eml')
| -rw-r--r-- | recipes/linux/linux-omap2-git/beagleboard/01-omap3-cpufreq.eml | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/recipes/linux/linux-omap2-git/beagleboard/01-omap3-cpufreq.eml b/recipes/linux/linux-omap2-git/beagleboard/01-omap3-cpufreq.eml new file mode 100644 index 0000000000..b45a81edce --- /dev/null +++ b/recipes/linux/linux-omap2-git/beagleboard/01-omap3-cpufreq.eml @@ -0,0 +1,319 @@ +CPUFreq driver for OMAP3 + +Signed-off-by: Rajendra Nayak <rnayak@ti.com> +--- + arch/arm/configs/omap_3430sdp_defconfig | 19 +++++++ + arch/arm/mach-omap2/clock34xx.c | 42 ++++++++++++++++- + arch/arm/mach-omap2/resource34xx.c | 6 -- + arch/arm/plat-omap/cpu-omap.c | 78 ++++++++++++++++++++++++++++++-- + drivers/cpufreq/cpufreq.c | 2 + 5 files changed, 136 insertions(+), 11 deletions(-) + +Index: linux-omap-2.6/arch/arm/mach-omap2/clock34xx.c +=================================================================== +--- linux-omap-2.6.orig/arch/arm/mach-omap2/clock34xx.c 2008-08-11 +17:21:57.000000000 +0530 ++++ linux-omap-2.6/arch/arm/mach-omap2/clock34xx.c 2008-08-11 +17:36:53.000000000 +0530 +@@ -31,6 +31,7 @@ + #include <asm/arch/sram.h> + #include <asm/div64.h> + #include <asm/bitops.h> ++#include <linux/cpufreq.h> + + #include <asm/arch/sdrc.h> + #include "clock.h" +@@ -637,6 +638,35 @@ static void omap3_clkoutx2_recalc(struct + */ + #if defined(CONFIG_ARCH_OMAP3) + ++#ifdef CONFIG_CPU_FREQ ++static struct cpufreq_frequency_table freq_table[MAX_VDD1_OPP+1]; ++ ++void omap2_clk_init_cpufreq_table(struct cpufreq_frequency_table **table) ++{ ++ struct vdd_prcm_config *prcm; ++ int i = 0; ++ ++ prcm = vdd1_rate_table + MAX_VDD1_OPP; ++ for (; prcm->speed; prcm--) { ++ freq_table[i].index = i; ++ freq_table[i].frequency = prcm->speed / 1000; ++ i++; ++ } ++ ++ if (i == 0) { ++ printk(KERN_WARNING "%s: failed to initialize frequency \ ++ table\n", ++ __func__); ++ return; ++ } ++ ++ freq_table[i].index = i; ++ freq_table[i].frequency = CPUFREQ_TABLE_END; ++ ++ *table = &freq_table[0]; ++} ++#endif ++ + static struct clk_functions omap2_clk_functions = { + .clk_enable = omap2_clk_enable, + .clk_disable = omap2_clk_disable, +@@ -644,6 +674,9 @@ static struct clk_functions omap2_clk_fu + .clk_set_rate = omap2_clk_set_rate, + .clk_set_parent = omap2_clk_set_parent, + .clk_disable_unused = omap2_clk_disable_unused, ++#ifdef CONFIG_CPU_FREQ ++ .clk_init_cpufreq_table = omap2_clk_init_cpufreq_table, ++#endif + }; + + /* +@@ -793,12 +826,11 @@ inline unsigned int get_opp(struct vdd_p + + if (prcm_config->speed <= freq) + return prcm_config->opp; /* Return the Highest OPP */ +- for (; prcm_config->speed; prcm_config--) { ++ for (; prcm_config->speed; prcm_config--) + if (prcm_config->speed < freq) + return (prcm_config+1)->opp; + else if (prcm_config->speed == freq) + return prcm_config->opp; +- } + /* Return the least OPP */ + return (prcm_config+1)->opp; + } +@@ -878,6 +910,10 @@ static int omap3_select_table_rate(struc + clk_set_rate(dpll1_clk, prcm_vdd->speed); + clk_set_rate(dpll2_clk, iva2_rate_table[index].speed); + curr_vdd1_prcm_set = prcm_vdd; ++ omap2_clksel_recalc(&mpu_ck); ++ propagate_rate(&mpu_ck); ++ omap2_clksel_recalc(&iva2_ck); ++ propagate_rate(&iva2_ck); + #ifndef CONFIG_CPU_FREQ + /*Update loops_per_jiffy if processor speed is being changed*/ + loops_per_jiffy = compute_lpj(loops_per_jiffy, +@@ -886,6 +922,8 @@ static int omap3_select_table_rate(struc + } else { + clk_set_rate(dpll3_clk, prcm_vdd->speed); + curr_vdd2_prcm_set = prcm_vdd; ++ omap2_clksel_recalc(&core_ck); ++ propagate_rate(&core_ck); + } + return 0; + } +Index: linux-omap-2.6/arch/arm/mach-omap2/resource34xx.c +=================================================================== +--- linux-omap-2.6.orig/arch/arm/mach-omap2/resource34xx.c 2008-08-11 +17:36:52.000000000 +0530 ++++ linux-omap-2.6/arch/arm/mach-omap2/resource34xx.c 2008-08-11 +17:36:53.000000000 +0530 +@@ -278,11 +278,7 @@ int set_freq(struct shared_resource *res + else if (strcmp(resp->name, "dsp_freq") == 0) + vdd1_opp = get_opp(iva2_rate_table + MAX_VDD1_OPP, + target_level); +- +- if (vdd1_opp == MIN_VDD1_OPP) +- resource_release("vdd1_opp", &dummy_srf_dev); +- else +- resource_request("vdd1_opp", &dummy_srf_dev, vdd1_opp); ++ resource_request("vdd1_opp", &dummy_srf_dev, vdd1_opp); + + resp->curr_level = target_level; + #endif +Index: linux-omap-2.6/arch/arm/plat-omap/cpu-omap.c +=================================================================== +--- linux-omap-2.6.orig/arch/arm/plat-omap/cpu-omap.c 2008-08-11 +17:21:57.000000000 +0530 ++++ linux-omap-2.6/arch/arm/plat-omap/cpu-omap.c 2008-08-11 17:36:53.000000000 ++0530 +@@ -8,6 +8,10 @@ + * + * 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. +@@ -25,6 +29,9 @@ + #include <asm/io.h> + #include <asm/system.h> + #include <asm/arch/clock.h> ++#if defined(CONFIG_ARCH_OMAP3) && !defined(CONFIG_OMAP_PM_NONE) ++#include <asm/arch/omap-pm.h> ++#endif + + #define VERY_HI_RATE 900000000 + +@@ -32,12 +39,34 @@ static struct cpufreq_frequency_table *f + + #ifdef CONFIG_ARCH_OMAP1 + #define MPU_CLK "mpu" ++#elif CONFIG_ARCH_OMAP3 ++#define MPU_CLK "virt_vdd1_prcm_set" + #else + #define MPU_CLK "virt_prcm_set" + #endif + + static struct clk *mpu_clk; + ++#ifdef CONFIG_MACH_OMAP_3430SDP ++extern struct vdd_prcm_config vdd1_rate_table[]; ++extern struct vdd_prcm_config vdd2_rate_table[]; ++extern struct vdd_prcm_config iva2_rate_table[]; ++#endif ++ ++#if defined(CONFIG_ARCH_OMAP3) && !defined(CONFIG_OMAP_PM_NONE) ++int cpufreq_pre_func(struct notifier_block *n, unsigned long event, void *ptr); ++int cpufreq_post_func(struct notifier_block *n, unsigned long event, void *ptr); ++static struct notifier_block cpufreq_pre = { ++ cpufreq_pre_func, ++ NULL, ++}; ++ ++static struct notifier_block cpufreq_post = { ++ cpufreq_post_func, ++ NULL, ++}; ++#endif ++ + /* TODO: Add support for SDRAM timing changes */ + + int omap_verify_speed(struct cpufreq_policy *policy) +@@ -89,7 +118,7 @@ static int omap_target(struct cpufreq_po + + if (freqs.old == freqs.new) + return ret; +- ++#ifdef CONFIG_ARCH_OMAP1 + cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); + #ifdef CONFIG_CPU_FREQ_DEBUG + printk(KERN_DEBUG "cpufreq-omap: transition: %u --> %u\n", +@@ -97,10 +126,50 @@ static int omap_target(struct cpufreq_po + #endif + ret = clk_set_rate(mpu_clk, freqs.new * 1000); + cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); +- ++#elif defined(CONFIG_ARCH_OMAP3) && !defined(CONFIG_OMAP_PM_NONE)\ ++ && defined(CONFIG_MACH_OMAP_3430SDP) ++ { ++ int ind; ++ for (ind = 1; ind <= MAX_VDD1_OPP; ind++) { ++ if (vdd1_rate_table[ind].speed/1000 >= freqs.new) { ++ omap_pm_cpu_set_freq ++ (vdd1_rate_table[ind].speed); ++ break; ++ } ++ } ++ } ++#endif + return ret; + } + ++#if defined(CONFIG_ARCH_OMAP3) && !defined(CONFIG_OMAP_PM_NONE) ++static struct cpufreq_freqs freqs_notify; ++int cpufreq_pre_func(struct notifier_block *n, unsigned long event, void *ptr) ++{ ++ struct clk_notifier_data *cnd; ++ ++ cnd = (struct clk_notifier_data *)ptr; ++ freqs_notify.old = cnd->old_rate/1000; ++ freqs_notify.new = cnd->new_rate/1000; ++ /* HACK: The clk_notify_post_rate_chg currently ++ * returns a zero for old_rate at bootup ++ */ ++ if (freqs_notify.old == 0) ++ freqs_notify.old = 500000; ++ cpufreq_notify_transition(&freqs_notify, CPUFREQ_PRECHANGE); ++ return 0; ++} ++ ++int cpufreq_post_func(struct notifier_block *n, unsigned long event, void *ptr) ++{ ++ struct clk_notifier_data *cnd; ++ ++ cnd = (struct clk_notifier_data *)ptr; ++ cpufreq_notify_transition(&freqs_notify, CPUFREQ_POSTCHANGE); ++ return 0; ++} ++#endif ++ + static int __init omap_cpu_init(struct cpufreq_policy *policy) + { + int result = 0; +@@ -128,7 +197,10 @@ static int __init omap_cpu_init(struct c + + /* FIXME: what's the actual transition time? */ + policy->cpuinfo.transition_latency = 10 * 1000 * 1000; +- ++#if defined(CONFIG_ARCH_OMAP3) && !defined(CONFIG_OMAP_PM_NONE) ++ clk_notifier_register(mpu_clk, &cpufreq_pre); ++ clk_notifier_register(mpu_clk, &cpufreq_post); ++#endif + return 0; + } + +Index: linux-omap-2.6/drivers/cpufreq/cpufreq.c +=================================================================== +--- linux-omap-2.6.orig/drivers/cpufreq/cpufreq.c 2008-08-11 17:21:57.000000000 ++0530 ++++ linux-omap-2.6/drivers/cpufreq/cpufreq.c 2008-08-11 17:36:53.000000000 +0530 +@@ -321,7 +321,9 @@ void cpufreq_notify_transition(struct cp + { + struct cpufreq_policy *policy; + ++#if 0 /*This causes an issue if clk_notify_post_rate_chg is used*/ + BUG_ON(irqs_disabled()); ++#endif + + freqs->flags = cpufreq_driver->flags; + dprintk("notification %u of frequency transition to %u kHz\n", +Index: linux-omap-2.6/arch/arm/configs/omap_3430sdp_defconfig +=================================================================== +--- linux-omap-2.6.orig/arch/arm/configs/omap_3430sdp_defconfig 2008-08-11 +17:36:43.000000000 +0530 ++++ linux-omap-2.6/arch/arm/configs/omap_3430sdp_defconfig 2008-08-11 +17:37:33.000000000 +0530 +@@ -193,6 +193,9 @@ CONFIG_OMAP_LL_DEBUG_UART1=y + # CONFIG_OMAP_LL_DEBUG_UART2 is not set + # CONFIG_OMAP_LL_DEBUG_UART3 is not set + CONFIG_OMAP_SERIAL_WAKE=y ++# CONFIG_OMAP_PM_NONE is not set ++# CONFIG_OMAP_PM_NOOP is not set ++CONFIG_OMAP_PM_SRF=y + CONFIG_ARCH_OMAP34XX=y + CONFIG_ARCH_OMAP3430=y + +@@ -288,7 +291,21 @@ CONFIG_CMDLINE="root=/dev/nfs nfsroot=19 + # + # CPU Frequency scaling + # +-# CONFIG_CPU_FREQ is not set ++CONFIG_CPU_FREQ=y ++CONFIG_CPU_FREQ_TABLE=y ++# CONFIG_CPU_FREQ_DEBUG is not set ++CONFIG_CPU_FREQ_STAT=y ++CONFIG_CPU_FREQ_STAT_DETAILS=y ++CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y ++# CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set ++# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set ++# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set ++# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set ++CONFIG_CPU_FREQ_GOV_PERFORMANCE=y ++# CONFIG_CPU_FREQ_GOV_POWERSAVE is not set ++# CONFIG_CPU_FREQ_GOV_USERSPACE is not set ++CONFIG_CPU_FREQ_GOV_ONDEMAND=y ++# CONFIG_CPU_FREQ_GOV_CONSERVATIVE is not set + + # + # Floating point emulation + + +-- +To unsubscribe from this list: send the line "unsubscribe linux-omap" in +the body of a message to majordomo@vger.kernel.org +More majordomo info at http://vger.kernel.org/majordomo-info.html |