On 25/08/2020 06:50, Viresh Kumar wrote:
> On 24-08-20, 15:59, Jon Hunter wrote:
>> Commit 6cc3d0e9a097 ("cpufreq: tegra186: add
>> CPUFREQ_NEED_INITIAL_FREQ_CHECK flag") fixed CPUFREQ support for
>> Tegra186 but as a consequence the following warnings are now seen on
>> boot ...
>>
>> cpufreq: cpufreq_online: CPU0: Running at unlisted freq: 0 KHz
>> cpufreq: cpufreq_online: CPU0: Unlisted initial frequency changed to: 2035200 KHz
>> cpufreq: cpufreq_online: CPU1: Running at unlisted freq: 0 KHz
>> cpufreq: cpufreq_online: CPU1: Unlisted initial frequency changed to: 2035200 KHz
>> cpufreq: cpufreq_online: CPU2: Running at unlisted freq: 0 KHz
>> cpufreq: cpufreq_online: CPU2: Unlisted initial frequency changed to: 2035200 KHz
>> cpufreq: cpufreq_online: CPU3: Running at unlisted freq: 0 KHz
>> cpufreq: cpufreq_online: CPU3: Unlisted initial frequency changed to: 2035200 KHz
>> cpufreq: cpufreq_online: CPU4: Running at unlisted freq: 0 KHz
>> cpufreq: cpufreq_online: CPU4: Unlisted initial frequency changed to: 2035200 KHz
>> cpufreq: cpufreq_online: CPU5: Running at unlisted freq: 0 KHz
>> cpufreq: cpufreq_online: CPU5: Unlisted initial frequency changed to: 2035200 KHz
>>
>> Fix this by adding a 'get' callback for the Tegra186 CPUFREQ driver to
>> retrieve the current operating frequency for a given CPU. The 'get'
>> callback uses the current 'ndiv' value that is programmed to determine
>> that current operating frequency.
>>
>> Signed-off-by: Jon Hunter <jonathanh@xxxxxxxxxx>
>> ---
>> Changes since V1:
>> - Moved code into a 'get' callback
>>
>> drivers/cpufreq/tegra186-cpufreq.c | 30 ++++++++++++++++++++++++++++++
>> 1 file changed, 30 insertions(+)
>>
>> diff --git a/drivers/cpufreq/tegra186-cpufreq.c b/drivers/cpufreq/tegra186-cpufreq.c
>> index 01e1f58ba422..0d0fcff60765 100644
>> --- a/drivers/cpufreq/tegra186-cpufreq.c
>> +++ b/drivers/cpufreq/tegra186-cpufreq.c
>> @@ -14,6 +14,7 @@
>>
>> #define EDVD_CORE_VOLT_FREQ(core) (0x20 + (core) * 0x4)
>> #define EDVD_CORE_VOLT_FREQ_F_SHIFT 0
>> +#define EDVD_CORE_VOLT_FREQ_F_MASK 0xffff
>> #define EDVD_CORE_VOLT_FREQ_V_SHIFT 16
>>
>> struct tegra186_cpufreq_cluster_info {
>> @@ -91,10 +92,39 @@ static int tegra186_cpufreq_set_target(struct cpufreq_policy *policy,
>> return 0;
>> }
>>
>> +static unsigned int tegra186_cpufreq_get(unsigned int cpu)
>> +{
>> + struct cpufreq_frequency_table *tbl;
>> + struct cpufreq_policy *policy;
>> + void __iomem *edvd_reg;
>> + unsigned int i, freq = 0;
>> + u32 ndiv;
>> +
>> + policy = cpufreq_cpu_get(cpu);
>> + if (!policy)
>> + return -EINVAL;
>
> This should be return 0;
>
> Applied with that change. Thanks.
OK, thanks!
Jon
--
nvpublic
