Vishwanath BS <vishwanath...@ti.com> writes:
> Changes in the omap cpufreq driver for DVFS support.
Missing descriptive changelog.
Should describe what, why, etc.
Kevin
> Signed-off-by: Vishwanath BS <vishwanath...@ti.com>
> Cc: Santosh Shilimkar <santosh.shilim...@ti.com>
> ---
> arch/arm/plat-omap/cpu-omap.c | 35 ++++++++++++++++++++++++++++++++---
> 1 files changed, 32 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/plat-omap/cpu-omap.c b/arch/arm/plat-omap/cpu-omap.c
> index 1c1b80b..d965220 100644
> --- a/arch/arm/plat-omap/cpu-omap.c
> +++ b/arch/arm/plat-omap/cpu-omap.c
> @@ -30,10 +30,12 @@
> #include <mach/hardware.h>
> #include <plat/clock.h>
> #include <asm/system.h>
> +#include <asm/cpu.h>
>
> #if defined(CONFIG_ARCH_OMAP3) && !defined(CONFIG_OMAP_PM_NONE)
> #include <plat/omap-pm.h>
> #include <plat/common.h>
> +#include <plat/dvfs.h>
> #endif
>
> #define VERY_HI_RATE 900000000
> @@ -85,11 +87,11 @@ static int omap_target(struct cpufreq_policy *policy,
> unsigned int target_freq,
> unsigned int relation)
> {
> -#ifdef CONFIG_ARCH_OMAP1
> struct cpufreq_freqs freqs;
> -#endif
> #if defined(CONFIG_ARCH_OMAP3) && !defined(CONFIG_OMAP_PM_NONE)
> unsigned long freq;
> + int i;
> + struct cpufreq_freqs freqs_notify;
> struct device *mpu_dev = omap2_get_mpuss_device();
> #endif
> int ret = 0;
> @@ -116,9 +118,36 @@ static int omap_target(struct cpufreq_policy *policy,
> 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)
> + freqs.old = omap_getspeed(policy->cpu);;
> + freqs_notify.new = clk_round_rate(mpu_clk, target_freq * 1000) / 1000;
> + freqs.cpu = policy->cpu;
> +
> + if (freqs.old == freqs.new)
> + return ret;
> +
> + /* pre notifiers */
> + for_each_cpu(i, policy->cpus) {
> + freqs.cpu = i;
> + cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
> + }
> +
> + /* scale the frequency */
> freq = target_freq * 1000;
> if (opp_find_freq_ceil(mpu_dev, &freq))
> - omap_pm_cpu_set_freq(freq);
> + omap_device_scale(mpu_dev, mpu_dev, freq);
> +
> + /* Update loops per jiffy */
> + freqs.new = omap_getspeed(policy->cpu);
> + for_each_cpu(i, policy->cpus)
> + per_cpu(cpu_data, i).loops_per_jiffy =
> + cpufreq_scale(per_cpu(cpu_data, i).loops_per_jiffy,
> + freqs.old, freqs.new);
> +
> + /* post notifiers */
> + for_each_cpu(i, policy->cpus) {
> + freqs.cpu = i;
> + cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
> + }
> #endif
> return ret;
> }
--
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