linux-kernel - Re: [PATCH v1 1/3] scsi: ufs-mediatek: add dbg_register

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Date:   Sun, 19 Jan 2020 19:35:12 +0530
From:   Alim Akhtar <alim.akhtar@...il.com>
To:     Stanley Chu <stanley.chu@...iatek.com>
Cc:     linux-scsi@...r.kernel.org,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Avri Altman <avri.altman@....com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Bean Huo (beanhuo)" <beanhuo@...ron.com>, asutoshd@...eaurora.org,
        Can Guo <cang@...eaurora.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Bart Van Assche <bvanassche@....org>,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        open list <linux-kernel@...r.kernel.org>,
        Kuohong Wang <kuohong.wang@...iatek.com>,
        peter.wang@...iatek.com, chun-hung.wu@...iatek.com,
        andy.teng@...iatek.com
Subject: Re: [PATCH v1 1/3] scsi: ufs-mediatek: add dbg_register_dump implementation

Hi Stanley

On Fri, Jan 17, 2020 at 9:44 AM Stanley Chu <stanley.chu@...iatek.com> wrote:
>
> Add dbg_register_dump variant vendor implementation in MediaTek
> UFS driver.
>
> Signed-off-by: Stanley Chu <stanley.chu@...iatek.com>
> ---

Reviewed-by: Alim Akhtar <alim.akhtar@...sung.com>

>  drivers/scsi/ufs/ufs-mediatek.c | 16 ++++++++++++++++
>  drivers/scsi/ufs/ufs-mediatek.h |  5 +++++
>  2 files changed, 21 insertions(+)
>
> diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c
> index 8d999c0e60fe..d5194d0c4ef5 100644
> --- a/drivers/scsi/ufs/ufs-mediatek.c
> +++ b/drivers/scsi/ufs/ufs-mediatek.c
> @@ -406,6 +406,21 @@ static int ufs_mtk_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
>         return 0;
>  }
>
> +static void ufs_mtk_dbg_register_dump(struct ufs_hba *hba)
> +{
> +       ufshcd_dump_regs(hba, REG_UFS_REFCLK_CTRL, 0x4, "Ref-Clk Ctrl ");
> +
> +       ufshcd_dump_regs(hba, REG_UFS_EXTREG, 0x4, "Ext Reg ");
> +
> +       ufshcd_dump_regs(hba, REG_UFS_MPHYCTRL,
> +                        REG_UFS_REJECT_MON - REG_UFS_MPHYCTRL + 4,
> +                        "MPHY Ctrl ");
> +
> +       /* Direct debugging information to REG_MTK_PROBE */
> +       ufshcd_writel(hba, 0x20, REG_UFS_DEBUG_SEL);
> +       ufshcd_dump_regs(hba, REG_UFS_PROBE, 0x4, "Debug Probe ");
> +}
> +
>  static int ufs_mtk_apply_dev_quirks(struct ufs_hba *hba,
>                                     struct ufs_dev_desc *card)
>  {
> @@ -430,6 +445,7 @@ static struct ufs_hba_variant_ops ufs_hba_mtk_vops = {
>         .apply_dev_quirks    = ufs_mtk_apply_dev_quirks,
>         .suspend             = ufs_mtk_suspend,
>         .resume              = ufs_mtk_resume,
> +       .dbg_register_dump   = ufs_mtk_dbg_register_dump,
>         .device_reset        = ufs_mtk_device_reset,
>  };
>
> diff --git a/drivers/scsi/ufs/ufs-mediatek.h b/drivers/scsi/ufs/ufs-mediatek.h
> index 31b7fead19eb..fccdd979d6fb 100644
> --- a/drivers/scsi/ufs/ufs-mediatek.h
> +++ b/drivers/scsi/ufs/ufs-mediatek.h
> @@ -13,6 +13,11 @@
>   * Vendor specific UFSHCI Registers
>   */
>  #define REG_UFS_REFCLK_CTRL         0x144
> +#define REG_UFS_EXTREG              0x2100
> +#define REG_UFS_MPHYCTRL            0x2200
> +#define REG_UFS_REJECT_MON          0x22AC
> +#define REG_UFS_DEBUG_SEL           0x22C0
> +#define REG_UFS_PROBE               0x22C8
>
>  /*
>   * Ref-clk control
> --
> 2.18.0



-- 
Regards,
Alim