Hi,
I think that you can squash this patch to patch4.
On 3/23/21 8:34 PM, Andrew-sh.Cheng wrote:
> From: "Andrew-sh.Cheng" <andrew-sh.ch...@mediatek.com>
>
> SVS will change the voltage of opp item.
What it the full name of SVS?
> CCI devfreq need to react to change frequency.
>
> Signed-off-by: Andrew-sh.Cheng <andrew-sh.ch...@mediatek.com>
> ---
> drivers/devfreq/mt8183-cci-devfreq.c | 27 +++++++++++++++++++++++++++
> 1 file changed, 27 insertions(+)
>
> diff --git a/drivers/devfreq/mt8183-cci-devfreq.c
> b/drivers/devfreq/mt8183-cci-devfreq.c
> index 018543db7bae..6942a48f3f4f 100644
> --- a/drivers/devfreq/mt8183-cci-devfreq.c
> +++ b/drivers/devfreq/mt8183-cci-devfreq.c
> @@ -21,6 +21,7 @@ struct cci_devfreq {
> struct clk *cci_clk;
> int old_vproc;
> unsigned long old_freq;
> + struct notifier_block opp_nb;
> };
>
> static int mtk_cci_set_voltage(struct cci_devfreq *cci_df, int vproc)
> @@ -89,6 +90,26 @@ static int mtk_cci_devfreq_target(struct device *dev,
> unsigned long *freq,
> return 0;
> }
>
> +static int ccidevfreq_opp_notifier(struct notifier_block *nb,
I think that you better to change the function name as following:
ccidevfreq_opp_notifier -> mtk_cci_devfreq_opp_notifier
> + unsigned long event, void *data)
> +{
> + struct dev_pm_opp *opp = data;
> + struct cci_devfreq *cci_df = container_of(nb, struct cci_devfreq,
> + opp_nb);
> + unsigned long freq, volt;
> +
> + if (event == OPP_EVENT_ADJUST_VOLTAGE) {
> + freq = dev_pm_opp_get_freq(opp);
> + /* current opp item is changed */
> + if (freq == cci_df->old_freq) {
> + volt = dev_pm_opp_get_voltage(opp);
> + mtk_cci_set_voltage(cci_df, volt);
> + }
> + }
> +
> + return 0;
> +}
> +
> static struct devfreq_dev_profile cci_devfreq_profile = {
> .target = mtk_cci_devfreq_target,
> };
> @@ -98,12 +119,15 @@ static int mtk_cci_devfreq_probe(struct platform_device
> *pdev)
> struct device *cci_dev = &pdev->dev;
> struct cci_devfreq *cci_df;
> struct devfreq_passive_data *passive_data;
> + struct notifier_block *opp_nb;
> int ret;
>
> cci_df = devm_kzalloc(cci_dev, sizeof(*cci_df), GFP_KERNEL);
> if (!cci_df)
> return -ENOMEM;
>
> + opp_nb = &cci_df->opp_nb;
Just move this code at the neighborhood of 'opp_nb->notifier_call' init code.
> +
> cci_df->cci_clk = devm_clk_get(cci_dev, "cci_clock");
> ret = PTR_ERR_OR_ZERO(cci_df->cci_clk);
> if (ret) {
> @@ -152,6 +176,9 @@ static int mtk_cci_devfreq_probe(struct platform_device
> *pdev)
> goto err_opp;
> }
>
> + opp_nb->notifier_call = ccidevfreq_opp_notifier;
> + dev_pm_opp_register_notifier(cci_dev, opp_nb);
Need to check whether return value is valid or not.
> +
> return 0;
>
> err_opp:
>
--
Best Regards,
Chanwoo Choi
Samsung Electronics
