linux-kernel - Re: [PATCH v4 14/16] phy: Add USB speed related PHY modes

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Date:   Fri, 5 Jan 2018 16:31:27 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Manu Gautam <mgautam@...eaurora.org>
CC:     Felipe Balbi <balbi@...nel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-usb@...r.kernel.org>,
        "open list:GENERIC PHY FRAMEWORK" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 14/16] phy: Add USB speed related PHY modes

Hi,

On Wednesday 03 January 2018 04:58 PM, Manu Gautam wrote:
> Add following USB speed related PHY modes:
> LS (Low Speed), FS (Full Speed), HS (High Speed), SS (Super Speed)
> 
> Speed related information is required by some QCOM PHY drivers
> to program PHY monitor resume/remote-wakeup events in suspended
> state. Speed is needed in order to set correct polarity of wakeup
> events for detection. E.g. QUSB2 PHY monitors DP/DM line state
> depending on whether speed is LS or FS/HS to detect resume.
> Similarly QMP USB3 PHY in SS mode should monitor RX terminations
> attach/detach and LFPS events depending on SSPHY is active or not.
> 
> Signed-off-by: Manu Gautam <mgautam@...eaurora.org>
> ---
>  drivers/phy/phy-core.c  | 15 +++++++++++++++
>  include/linux/phy/phy.h | 32 ++++++++++++++++++++++++--------
>  2 files changed, 39 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
> index b4964b0..e4f0525 100644
> --- a/drivers/phy/phy-core.c
> +++ b/drivers/phy/phy-core.c
> @@ -357,6 +357,21 @@ int phy_set_mode(struct phy *phy, enum phy_mode mode)
>  }
>  EXPORT_SYMBOL_GPL(phy_set_mode);
>  
> +enum phy_mode phy_get_mode(struct phy *phy)
> +{
> +	enum phy_mode ret;
> +
> +	if (!phy || !phy->ops->get_mode)
> +		return PHY_MODE_INVALID;
> +
> +	mutex_lock(&phy->mutex);
> +	ret = phy->ops->get_mode(phy);

Since get_mode only has to return the phy mode, there is no need for an ops
here. Just add phy_mode in phy_attrs in set_mode and return it here.

Thanks
Kishon