linux-kernel - Re: [PATCH v5 3/5] opp: Add dev_pm_opp_find_level

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Message-ID: <20230927071458.busudwwj26kmia4u@vireshk-i7>
Date:   Wed, 27 Sep 2023 12:44:58 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Krishna chaitanya chundru <quic_krichai@...cinc.com>
Cc:     agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        vireshk@...nel.org, nm@...com, sboyd@...nel.org, mani@...nel.org,
        lpieralisi@...nel.org, kw@...ux.com, robh@...nel.org,
        bhelgaas@...gle.com, rafael@...nel.org,
        linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, quic_vbadigan@...cinc.com,
        quic_nitegupt@...cinc.com, quic_skananth@...cinc.com,
        quic_ramkri@...cinc.com, quic_parass@...cinc.com
Subject: Re: [PATCH v5 3/5] opp: Add dev_pm_opp_find_level_floor()

On 07-09-23, 11:30, Krishna chaitanya chundru wrote:

$Subject should have OPP instead of opp. Past history of framework can be seen
for this.

> During initialization of some drivers, need to vote for max level.
> 
> Adding dev_pm_opp_find_level_floor() for searching a lesser match or
> operating on OPP in the order of decreasing level.
> 
> Signed-off-by: Krishna chaitanya chundru <quic_krichai@...cinc.com>
> ---
>  drivers/opp/core.c     | 25 +++++++++++++++++++++++++
>  include/linux/pm_opp.h |  9 +++++++++
>  2 files changed, 34 insertions(+)
> 
> diff --git a/drivers/opp/core.c b/drivers/opp/core.c
> index 919cc53..6d4d226 100644
> --- a/drivers/opp/core.c
> +++ b/drivers/opp/core.c
> @@ -814,6 +814,31 @@ struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
>  EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_ceil);
>  
>  /**
> + * dev_pm_opp_find_level_floor() - Search for a rounded floor freq

freq ?

> + * @dev:	device for which we do this operation
> + * @level:	Start level
> + *
> + * Search for the matching floor *available* OPP from a starting level
> + * for a device.
> + *
> + * Return: matching *opp and refreshes *level accordingly, else returns
> + * ERR_PTR in case of error and should be handled using IS_ERR. Error return
> + * values can be:
> + * EINVAL:	for bad pointer
> + * ERANGE:	no match found for search
> + * ENODEV:	if device not found in list of registered devices
> + *
> + * The callers are required to call dev_pm_opp_put() for the returned OPP after
> + * use.
> + */
> +struct dev_pm_opp *dev_pm_opp_find_level_floor(struct device *dev,
> +					       unsigned long *level)
> +{
> +	return _find_key_floor(dev, level, 0, true, _read_level, NULL);
> +}
> +EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_floor);
> +
> +/**
>   * dev_pm_opp_find_bw_ceil() - Search for a rounded ceil bandwidth
>   * @dev:	device for which we do this operation
>   * @bw:	start bandwidth
> diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
> index 91f87d7..baea92f 100644
> --- a/include/linux/pm_opp.h
> +++ b/include/linux/pm_opp.h
> @@ -144,6 +144,9 @@ struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
>  struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
>  					      unsigned int *level);
>  
> +struct dev_pm_opp *dev_pm_opp_find_level_floor(struct device *dev,
> +					       unsigned long *level);
> +
>  struct dev_pm_opp *dev_pm_opp_find_bw_ceil(struct device *dev,
>  					   unsigned int *bw, int index);
>  
> @@ -314,6 +317,12 @@ static inline struct dev_pm_opp *dev_pm_opp_find_bw_ceil(struct device *dev,
>  	return ERR_PTR(-EOPNOTSUPP);
>  }
>  
> +static inline struct dev_pm_opp *dev_pm_opp_find_level_floor(struct device *dev,

Why add between two bw related functions ?

> +							     unsigned long *level)
> +{
> +	return ERR_PTR(-EOPNOTSUPP);
> +}
> +
>  static inline struct dev_pm_opp *dev_pm_opp_find_bw_floor(struct device *dev,
>  					unsigned int *bw, int index)
>  {

Fixed all this and applied. Thanks.

-- 
viresh