On 23/07/14 07:44, Viresh Kumar wrote:
> On 21 July 2014 21:09, Tuomas Tynkkynen <ttynkkynen@xxxxxxxxxx> wrote:
>
>> diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
>> index 7364a53..df3c73e 100644
>> --- a/drivers/cpufreq/Kconfig.arm
>> +++ b/drivers/cpufreq/Kconfig.arm
>> @@ -244,6 +244,7 @@ config ARM_SPEAR_CPUFREQ
>> config ARM_TEGRA_CPUFREQ
>> bool "TEGRA CPUFreq support"
>> depends on ARCH_TEGRA
>> + depends on GENERIC_CPUFREQ_CPU0
>
> Wouldn't this also disturb the existing cpufreq driver for earlier
> tegra platforms? i.e. we don't need cpufreq-cpu0 for them
> atleast as of now.
>
>> default y
>> help
>> This adds the CPUFreq driver support for TEGRA SOCs.
>> diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
>> index db6d9a2..3437d24 100644
>> --- a/drivers/cpufreq/Makefile
>> +++ b/drivers/cpufreq/Makefile
>> @@ -76,6 +76,7 @@ obj-$(CONFIG_ARM_SA1100_CPUFREQ) += sa1100-cpufreq.o
>> obj-$(CONFIG_ARM_SA1110_CPUFREQ) += sa1110-cpufreq.o
>> obj-$(CONFIG_ARM_SPEAR_CPUFREQ) += spear-cpufreq.o
>> obj-$(CONFIG_ARM_TEGRA_CPUFREQ) += tegra-cpufreq.o
>> +obj-$(CONFIG_ARM_TEGRA_CPUFREQ) += tegra124-cpufreq.o
>
> Maybe, you can update the same line if you want.
Oh, right.
>
>> obj-$(CONFIG_ARM_VEXPRESS_SPC_CPUFREQ) += vexpress-spc-cpufreq.o
>>
>> ##################################################################################
>> diff --git a/drivers/cpufreq/tegra124-cpufreq.c b/drivers/cpufreq/tegra124-cpufreq.c
>
>> +static struct cpufreq_frequency_table *freq_table;
>> +
>> +static struct device *cpu_dev;
>> +static struct clk *cpu_clk;
>> +static struct clk *pllp_clk;
>> +static struct clk *pllx_clk;
>> +static struct clk *dfll_clk;
>
> The routines in this file are going to be called just once at boot, right?
> In that case we are actually wasting some memory by creating globals.
> Probably just move all these in a struct and allocate it at runtime.
>
Sure.
[...]
>> +
>> + ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table);
>> + if (ret)
>> + goto out_put_pllp_clk;
>
> Why do you need this? cpufreq-cpu0 also does it and this freq_table is
> just not getting used at all then.
>
Oops, yes I forgot to remove that part when making the conversion.
>> +
>> + pdev = platform_device_register_simple("cpufreq-tegra124", -1, NULL, 0);
>> + if (IS_ERR(pdev)) {
>> + platform_driver_unregister(&tegra124_cpufreq_platdrv);
>> + return PTR_ERR(pdev);
>> + }
>
> Why create another unnecessary platform-device/driver here? If
> of_find_matching_node() passes and you really need to probe cpufreq-cpu0
> here, then just remove the other two calls and move probe's implementation
> here only.
>
The platform device is required for the deferred probe that can happen if the
DFLL driver hasn't initialized yet, and module_init() callbacks don't seem to
respect -EPROBE_DEFER.
[...]
--
nvpublic
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