On 25.06.2023 22:25, Dmitry Baryshkov wrote:
> Scaling the frequencies on some of Qualcomm Krait platforms (e.g.
> APQ8064) also requires scaling of the L2 cache frequency. As the
> l2-cache device node is places under /cpus/ path, it is not created by
> default by the OF code. Create corresponding device here.
>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
> ---
I think a generic solution (i.e. for each cpu node call
of_platform_populate in drivers/of/platform.c :
of_platform_default_populate_init) could be beneficial
Konrad
> drivers/cpufreq/qcom-cpufreq-nvmem.c | 20 ++++++++++++++++++++
> 1 file changed, 20 insertions(+)
>
> diff --git a/drivers/cpufreq/qcom-cpufreq-nvmem.c b/drivers/cpufreq/qcom-cpufreq-nvmem.c
> index a88b6fe5db50..ab78ef1531d0 100644
> --- a/drivers/cpufreq/qcom-cpufreq-nvmem.c
> +++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c
> @@ -380,6 +380,7 @@ static int __init qcom_cpufreq_init(void)
> {
> struct device_node *np = of_find_node_by_path("/");
> const struct of_device_id *match;
> + unsigned int cpu;
> int ret;
>
> if (!np)
> @@ -390,6 +391,25 @@ static int __init qcom_cpufreq_init(void)
> if (!match)
> return -ENODEV;
>
> + for_each_possible_cpu(cpu) {
> + struct device *dev = get_cpu_device(cpu);
> + struct device_node *cache;
> + struct platform_device *pdev;
> +
> + cache = of_find_next_cache_node(dev->of_node);
> + if (!cache)
> + continue;
> +
> + if (of_device_is_compatible(cache, "qcom,krait-l2-cache")) {
> + pdev = of_platform_device_create(cache, NULL, NULL);
> + if (IS_ERR(pdev))
> + pr_err("%s: %pe, failed to create L2 cache node\n", __func__, pdev);
> + /* the error is not fatal */
> + }
> +
> + of_node_put(cache);
> + }
> +
> ret = platform_driver_register(&qcom_cpufreq_driver);
> if (unlikely(ret < 0))
> return ret;
