linux-kernel - Re: [PATCH 1/3] phy: qcom-ufs: Remove stale methods that handle ref clk

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Date:   Mon, 24 Sep 2018 10:23:42 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Vivek Gautam <vivek.gautam@...eaurora.org>
Cc:     kishon@...com, vinholikatti@...il.com, jejb@...ux.vnet.ibm.com,
        martin.petersen@...cle.com, linux-kernel@...r.kernel.org,
        linux-scsi@...r.kernel.org, subhashj@...eaurora.org,
        evgreen@...omium.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 1/3] phy: qcom-ufs: Remove stale methods that handle ref
 clk

On Tue 04 Sep 03:17 PDT 2018, Vivek Gautam wrote:

> Remove ufs_qcom_phy_enable/(disable)_dev_ref_clk() that
> are not being used by any code.
> 
> Signed-off-by: Vivek Gautam <vivek.gautam@...eaurora.org>

Thanks for the ping Vivek, I didn't spot these when you posted them.

Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>

Regards,
Bjorn

> ---
>  drivers/phy/qualcomm/phy-qcom-ufs.c | 50 -------------------------------------
>  include/linux/phy/phy-qcom-ufs.h    | 14 -----------
>  2 files changed, 64 deletions(-)
> 
> diff --git a/drivers/phy/qualcomm/phy-qcom-ufs.c b/drivers/phy/qualcomm/phy-qcom-ufs.c
> index c5493ea51282..f2979ccad00a 100644
> --- a/drivers/phy/qualcomm/phy-qcom-ufs.c
> +++ b/drivers/phy/qualcomm/phy-qcom-ufs.c
> @@ -431,56 +431,6 @@ static void ufs_qcom_phy_disable_ref_clk(struct ufs_qcom_phy *phy)
>  	}
>  }
>  
> -#define UFS_REF_CLK_EN	(1 << 5)
> -
> -static void ufs_qcom_phy_dev_ref_clk_ctrl(struct phy *generic_phy, bool enable)
> -{
> -	struct ufs_qcom_phy *phy = get_ufs_qcom_phy(generic_phy);
> -
> -	if (phy->dev_ref_clk_ctrl_mmio &&
> -	    (enable ^ phy->is_dev_ref_clk_enabled)) {
> -		u32 temp = readl_relaxed(phy->dev_ref_clk_ctrl_mmio);
> -
> -		if (enable)
> -			temp |= UFS_REF_CLK_EN;
> -		else
> -			temp &= ~UFS_REF_CLK_EN;
> -
> -		/*
> -		 * If we are here to disable this clock immediately after
> -		 * entering into hibern8, we need to make sure that device
> -		 * ref_clk is active atleast 1us after the hibern8 enter.
> -		 */
> -		if (!enable)
> -			udelay(1);
> -
> -		writel_relaxed(temp, phy->dev_ref_clk_ctrl_mmio);
> -		/* ensure that ref_clk is enabled/disabled before we return */
> -		wmb();
> -		/*
> -		 * If we call hibern8 exit after this, we need to make sure that
> -		 * device ref_clk is stable for atleast 1us before the hibern8
> -		 * exit command.
> -		 */
> -		if (enable)
> -			udelay(1);
> -
> -		phy->is_dev_ref_clk_enabled = enable;
> -	}
> -}
> -
> -void ufs_qcom_phy_enable_dev_ref_clk(struct phy *generic_phy)
> -{
> -	ufs_qcom_phy_dev_ref_clk_ctrl(generic_phy, true);
> -}
> -EXPORT_SYMBOL_GPL(ufs_qcom_phy_enable_dev_ref_clk);
> -
> -void ufs_qcom_phy_disable_dev_ref_clk(struct phy *generic_phy)
> -{
> -	ufs_qcom_phy_dev_ref_clk_ctrl(generic_phy, false);
> -}
> -EXPORT_SYMBOL_GPL(ufs_qcom_phy_disable_dev_ref_clk);
> -
>  /* Turn ON M-PHY RMMI interface clocks */
>  static int ufs_qcom_phy_enable_iface_clk(struct ufs_qcom_phy *phy)
>  {
> diff --git a/include/linux/phy/phy-qcom-ufs.h b/include/linux/phy/phy-qcom-ufs.h
> index 0a2c18a9771d..9dd85071bcce 100644
> --- a/include/linux/phy/phy-qcom-ufs.h
> +++ b/include/linux/phy/phy-qcom-ufs.h
> @@ -17,20 +17,6 @@
>  
>  #include "phy.h"
>  
> -/**
> - * ufs_qcom_phy_enable_dev_ref_clk() - Enable the device
> - * ref clock.
> - * @phy: reference to a generic phy.
> - */
> -void ufs_qcom_phy_enable_dev_ref_clk(struct phy *phy);
> -
> -/**
> - * ufs_qcom_phy_disable_dev_ref_clk() - Disable the device
> - * ref clock.
> - * @phy: reference to a generic phy.
> - */
> -void ufs_qcom_phy_disable_dev_ref_clk(struct phy *phy);
> -
>  int ufs_qcom_phy_set_tx_lane_enable(struct phy *phy, u32 tx_lanes);
>  void ufs_qcom_phy_save_controller_version(struct phy *phy,
>  			u8 major, u16 minor, u16 step);
> -- 
> QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
> of Code Aurora Forum, hosted by The Linux Foundation
>