linux-kernel - Re: [PATCH v4 1/2] phy: Add new PHY attribute max_link

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Message-ID: <b6fa3c63-1662-b191-200f-218630c950f9@ti.com>
Date:   Thu, 23 Jul 2020 10:21:29 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Swapnil Jakhade <sjakhade@...ence.com>, <vkoul@...nel.org>,
        <linux-kernel@...r.kernel.org>, <maxime@...no.tech>
CC:     <mparab@...ence.com>, <yamonkar@...ence.com>, <nsekhar@...com>,
        <tomi.valkeinen@...com>, <jsarha@...com>, <praneeth@...com>
Subject: Re: [PATCH v4 1/2] phy: Add new PHY attribute max_link_rate and APIs
 to get/set PHY attributes



On 7/17/2020 12:20 PM, Swapnil Jakhade wrote:
> Add new PHY attribute max_link_rate to struct phy_attrs.
> Add a pair of PHY APIs to get/set all the PHY attributes.
> Use phy_get_attrs() to get attribute values and phy_set_attrs()
> to set attribute values.
> 
> Signed-off-by: Yuti Amonkar <yamonkar@...ence.com>
> Signed-off-by: Swapnil Jakhade <sjakhade@...ence.com>

Acked-by: Kishon Vijay Abraham I <kishon@...com>

> ---
>  include/linux/phy/phy.h | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
> 
> diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
> index bcee8eba62b3..5d8ebb056c1d 100644
> --- a/include/linux/phy/phy.h
> +++ b/include/linux/phy/phy.h
> @@ -115,10 +115,12 @@ struct phy_ops {
>  /**
>   * struct phy_attrs - represents phy attributes
>   * @bus_width: Data path width implemented by PHY
> + * @max_link_rate: Maximum link rate supported by PHY (in Mbps)
>   * @mode: PHY mode
>   */
>  struct phy_attrs {
>  	u32			bus_width;
> +	u32			max_link_rate;
>  	enum phy_mode		mode;
>  };
>  
> @@ -231,6 +233,20 @@ static inline void phy_set_bus_width(struct phy *phy, int bus_width)
>  {
>  	phy->attrs.bus_width = bus_width;
>  }
> +
> +static inline void phy_get_attrs(struct phy *phy, struct phy_attrs *attrs)
> +{
> +	mutex_lock(&phy->mutex);
> +	memcpy(attrs, &phy->attrs, sizeof(struct phy_attrs));
> +	mutex_unlock(&phy->mutex);
> +}
> +
> +static inline void phy_set_attrs(struct phy *phy, struct phy_attrs attrs)
> +{
> +	mutex_lock(&phy->mutex);
> +	memcpy(&phy->attrs, &attrs, sizeof(struct phy_attrs));
> +	mutex_unlock(&phy->mutex);
> +}
>  struct phy *phy_get(struct device *dev, const char *string);
>  struct phy *phy_optional_get(struct device *dev, const char *string);
>  struct phy *devm_phy_get(struct device *dev, const char *string);
> @@ -389,6 +405,16 @@ static inline void phy_set_bus_width(struct phy *phy, int bus_width)
>  	return;
>  }
>  
> +static inline void phy_get_attrs(struct phy *phy, struct phy_attrs *attrs)
> +{
> +	return;
> +}
> +
> +static inline void phy_set_attrs(struct phy *phy, struct phy_attrs attrs)
> +{
> +	return;
> +}
> +
>  static inline struct phy *phy_get(struct device *dev, const char *string)
>  {
>  	return ERR_PTR(-ENOSYS);
>