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Date:   Tue, 18 Oct 2016 17:07:29 -0700
From:   Subhash Jadavani <subhashj@...eaurora.org>
To:     Vivek Gautam <vivek.gautam@...eaurora.org>
Cc:     kishon@...com, jejb@...ux.vnet.ibm.com, vinholikatti@...il.com,
        martin.petersen@...cle.com, linux-kernel@...r.kernel.org,
        linux-scsi@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v2 10/10] phy: qcom-ufs: Remove common layer phy exit
 callback

On 2016-10-18 07:28, Vivek Gautam wrote:
> The common layer phy exit callback ufs_qcom_phy_exit()
> calls phy_power_off() that has no meaning when phy_power_off()
> callback is already registered with the phy provider and
> the consumer makes use of the same.
> Instead, add a no-op specific phy_exit() callback for now
> to add the exit sequence at a later point.
> 
> Signed-off-by: Vivek Gautam <vivek.gautam@...eaurora.org>
> ---
> 
> New patch added in v2 series.
> 
>  drivers/phy/phy-qcom-ufs-i.h        |  1 -
>  drivers/phy/phy-qcom-ufs-qmp-14nm.c |  7 ++++++-
>  drivers/phy/phy-qcom-ufs-qmp-20nm.c |  7 ++++++-
>  drivers/phy/phy-qcom-ufs.c          | 17 ++++++-----------
>  4 files changed, 18 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/phy/phy-qcom-ufs-i.h 
> b/drivers/phy/phy-qcom-ufs-i.h
> index 69e836d..d505d98 100644
> --- a/drivers/phy/phy-qcom-ufs-i.h
> +++ b/drivers/phy/phy-qcom-ufs-i.h
> @@ -141,7 +141,6 @@ struct ufs_qcom_phy_specific_ops {
>  struct ufs_qcom_phy *get_ufs_qcom_phy(struct phy *generic_phy);
>  int ufs_qcom_phy_power_on(struct phy *generic_phy);
>  int ufs_qcom_phy_power_off(struct phy *generic_phy);
> -int ufs_qcom_phy_exit(struct phy *generic_phy);
>  int ufs_qcom_phy_init_clks(struct ufs_qcom_phy *phy_common);
>  int ufs_qcom_phy_init_vregulators(struct ufs_qcom_phy *phy_common);
>  int ufs_qcom_phy_remove(struct phy *generic_phy,
> diff --git a/drivers/phy/phy-qcom-ufs-qmp-14nm.c
> b/drivers/phy/phy-qcom-ufs-qmp-14nm.c
> index a60cf34..061604f 100644
> --- a/drivers/phy/phy-qcom-ufs-qmp-14nm.c
> +++ b/drivers/phy/phy-qcom-ufs-qmp-14nm.c
> @@ -47,6 +47,11 @@ static int ufs_qcom_phy_qmp_14nm_init(struct phy
> *generic_phy)
>  	return 0;
>  }
> 
> +static int ufs_qcom_phy_qmp_14nm_exit(struct phy *generic_phy)
> +{
> +	return 0;
> +}
> +
>  static
>  void ufs_qcom_phy_qmp_14nm_power_control(struct ufs_qcom_phy *phy, 
> bool val)
>  {
> @@ -94,7 +99,7 @@ static int ufs_qcom_phy_qmp_14nm_is_pcs_ready(struct
> ufs_qcom_phy *phy_common)
> 
>  static const struct phy_ops ufs_qcom_phy_qmp_14nm_phy_ops = {
>  	.init		= ufs_qcom_phy_qmp_14nm_init,
> -	.exit		= ufs_qcom_phy_exit,
> +	.exit		= ufs_qcom_phy_qmp_14nm_exit,
>  	.power_on	= ufs_qcom_phy_power_on,
>  	.power_off	= ufs_qcom_phy_power_off,
>  	.owner		= THIS_MODULE,
> diff --git a/drivers/phy/phy-qcom-ufs-qmp-20nm.c
> b/drivers/phy/phy-qcom-ufs-qmp-20nm.c
> index dfc5175..1a26a64 100644
> --- a/drivers/phy/phy-qcom-ufs-qmp-20nm.c
> +++ b/drivers/phy/phy-qcom-ufs-qmp-20nm.c
> @@ -66,6 +66,11 @@ static int ufs_qcom_phy_qmp_20nm_init(struct phy
> *generic_phy)
>  	return 0;
>  }
> 
> +static int ufs_qcom_phy_qmp_20nm_exit(struct phy *generic_phy)
> +{
> +	return 0;
> +}
> +
>  static
>  void ufs_qcom_phy_qmp_20nm_power_control(struct ufs_qcom_phy *phy, 
> bool val)
>  {
> @@ -152,7 +157,7 @@ static int
> ufs_qcom_phy_qmp_20nm_is_pcs_ready(struct ufs_qcom_phy *phy_common)
> 
>  static const struct phy_ops ufs_qcom_phy_qmp_20nm_phy_ops = {
>  	.init		= ufs_qcom_phy_qmp_20nm_init,
> -	.exit		= ufs_qcom_phy_exit,
> +	.exit		= ufs_qcom_phy_qmp_20nm_exit,
>  	.power_on	= ufs_qcom_phy_power_on,
>  	.power_off	= ufs_qcom_phy_power_off,
>  	.owner		= THIS_MODULE,
> diff --git a/drivers/phy/phy-qcom-ufs.c b/drivers/phy/phy-qcom-ufs.c
> index a425cc2..494f90f 100644
> --- a/drivers/phy/phy-qcom-ufs.c
> +++ b/drivers/phy/phy-qcom-ufs.c
> @@ -615,17 +615,6 @@ int ufs_qcom_phy_calibrate_phy(struct phy
> *generic_phy, bool is_rate_B)
>  }
>  EXPORT_SYMBOL_GPL(ufs_qcom_phy_calibrate_phy);
> 
> -int ufs_qcom_phy_exit(struct phy *generic_phy)
> -{
> -	struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(generic_phy);
> -
> -	if (ufs_qcom_phy->is_powered_on)
> -		phy_power_off(generic_phy);
> -
> -	return 0;
> -}
> -EXPORT_SYMBOL_GPL(ufs_qcom_phy_exit);
> -
>  int ufs_qcom_phy_is_pcs_ready(struct phy *generic_phy)
>  {
>  	struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(generic_phy);
> @@ -647,6 +636,9 @@ int ufs_qcom_phy_power_on(struct phy *generic_phy)
>  	struct device *dev = phy_common->dev;
>  	int err;
> 
> +	if (phy_common->is_powered_on)
> +		return 0;
> +
>  	err = ufs_qcom_phy_enable_vreg(dev, &phy_common->vdda_phy);
>  	if (err) {
>  		dev_err(dev, "%s enable vdda_phy failed, err=%d\n",
> @@ -709,6 +701,9 @@ int ufs_qcom_phy_power_off(struct phy *generic_phy)
>  {
>  	struct ufs_qcom_phy *phy_common = get_ufs_qcom_phy(generic_phy);
> 
> +	if (!phy_common->is_powered_on)
> +		return 0;
> +
>  	phy_common->phy_spec_ops->power_control(phy_common, false);
> 
>  	if (phy_common->vddp_ref_clk.reg)

LGTM , Reviewed-by: Subhash Jadavani <subhashj@...eaurora.org>

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