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SubjectRe: [RFC PATCH 4/9] cpufreq: qcom: support qcs404 on nvmem driver
On 04-04-19, 07:09, Niklas Cassel wrote:
> From: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
>

Always have something here, even for the simplest of the patches.

> Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
> Co-developed-by: Niklas Cassel <niklas.cassel@linaro.org>
> Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org>
> ---
> drivers/cpufreq/qcom-cpufreq-nvmem.c | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
> diff --git a/drivers/cpufreq/qcom-cpufreq-nvmem.c b/drivers/cpufreq/qcom-cpufreq-nvmem.c
> index 366c65a7132a..7fdc38218390 100644
> --- a/drivers/cpufreq/qcom-cpufreq-nvmem.c
> +++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c
> @@ -24,6 +24,7 @@
> #include <linux/of.h>
> #include <linux/of_device.h>
> #include <linux/platform_device.h>
> +#include <linux/pm_domain.h>
> #include <linux/pm_opp.h>
> #include <linux/slab.h>
> #include <linux/soc/qcom/smem.h>
> @@ -79,6 +80,13 @@ static enum _msm8996_version qcom_cpufreq_get_msm_id(void)
> return version;
> }
>
> +static int qcom_cpufreq_qcs404_name_version(struct device *cpu_dev,
> + struct nvmem_cell *speedbin_nvmem,
> + struct qcom_cpufreq_drv *drv)
> +{
> + return 0;
> +}
> +

Why provide empty stubs? Rather check for get_version() in probe and call only
if it is supported.

> static int qcom_cpufreq_kryo_name_version(struct device *cpu_dev,
> struct nvmem_cell *speedbin_nvmem,
> struct qcom_cpufreq_drv *drv)
> @@ -191,6 +199,14 @@ static int qcom_cpufreq_probe(struct platform_device *pdev)
> dev_err(cpu_dev, "Failed to set supported hardware\n");
> goto free_opp;
> }
> +
> + ret = dev_pm_domain_attach(cpu_dev, false);

Why is it required specially for this platform and not earlier ?

And I was hoping for the attach-by-name thing to be present here instead because
of multiple domain thing.

> + if (ret) {
> + if (ret == -EPROBE_DEFER)
> + goto free_opp;
> + dev_err(cpu_dev, "Could not attach to pm_domain: %d\n",
> + ret);

And it is okay if we couldn't attach the domain ?

> + }
> }
>
> cpufreq_dt_pdev = platform_device_register_simple("cpufreq-dt", -1,
> @@ -247,6 +263,8 @@ static const struct of_device_id qcom_cpufreq_match_list[] __initconst = {
> .data = qcom_cpufreq_kryo_name_version },
> { .compatible = "qcom,msm8996",
> .data = qcom_cpufreq_kryo_name_version },
> + { .compatible = "qcom,qcs404",
> + .data = qcom_cpufreq_qcs404_name_version },
> {},
> };
>
> --
> 2.20.1

--
viresh

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