linux-kernel - RE: [PATCH 4/8] scsi: ufs: qcom: Implement the freq_to_gear

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Message-ID:
 <DM6PR04MB6575AEC570DA0E05BCDFADCDFC1A2@DM6PR04MB6575.namprd04.prod.outlook.com>
Date: Thu, 16 Jan 2025 21:40:21 +0000
From: Avri Altman <Avri.Altman@....com>
To: Ziqi Chen <quic_ziqichen@...cinc.com>, "quic_cang@...cinc.com"
	<quic_cang@...cinc.com>, "bvanassche@....org" <bvanassche@....org>,
	"mani@...nel.org" <mani@...nel.org>, "beanhuo@...ron.com"
	<beanhuo@...ron.com>, "junwoo80.lee@...sung.com" <junwoo80.lee@...sung.com>,
	"martin.petersen@...cle.com" <martin.petersen@...cle.com>,
	"quic_nguyenb@...cinc.com" <quic_nguyenb@...cinc.com>,
	"quic_nitirawa@...cinc.com" <quic_nitirawa@...cinc.com>,
	"quic_rampraka@...cinc.com" <quic_rampraka@...cinc.com>
CC: "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>, Manivannan
 Sadhasivam <manivannan.sadhasivam@...aro.org>, "James E.J. Bottomley"
	<James.Bottomley@...senPartnership.com>, "open list:ARM/QUALCOMM MAILING
 LIST" <linux-arm-msm@...r.kernel.org>, open list
	<linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 4/8] scsi: ufs: qcom: Implement the freq_to_gear_speed()
 vops

> From: Can Guo <quic_cang@...cinc.com>
> 
> Implement the freq_to_gear_speed() vops to map the unipro core clock
> frequency to the corresponding maximum supported gear speed.
> 
> Co-developed-by: Ziqi Chen <quic_ziqichen@...cinc.com>
> Signed-off-by: Ziqi Chen <quic_ziqichen@...cinc.com>
> Signed-off-by: Can Guo <quic_cang@...cinc.com>
> ---
>  drivers/ufs/host/ufs-qcom.c | 32 ++++++++++++++++++++++++++++++++
>  1 file changed, 32 insertions(+)
> 
> diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index
> 1e8a23eb8c13..64263fa884f5 100644
> --- a/drivers/ufs/host/ufs-qcom.c
> +++ b/drivers/ufs/host/ufs-qcom.c
> @@ -1803,6 +1803,37 @@ static int ufs_qcom_config_esi(struct ufs_hba *hba)
>         return ret;
>  }
> 
> +static int ufs_qcom_freq_to_gear_speed(struct ufs_hba *hba, unsigned
> +long freq, u32 *gear) {
> +       int ret = 0;
> +
> +       switch (freq) {
Maybe you can use here the UNIPRO_CORE_CLK_FREQ_xx ?

Thanks,
Avri
> +       case 403000000:
> +               *gear = UFS_HS_G5;
> +               break;
> +       case 300000000:
> +               *gear = UFS_HS_G4;
> +               break;
> +       case 201500000:
> +               *gear = UFS_HS_G3;
> +               break;
> +       case 150000000:
> +       case 100000000:
> +               *gear = UFS_HS_G2;
> +               break;
> +       case 75000000:
> +       case 37500000:
> +               *gear = UFS_HS_G1;
> +               break;
> +       default:
> +               ret = -EINVAL;
> +               dev_err(hba->dev, "Unsupported clock freq\n");
> +               break;
> +       }
> +
> +       return ret;
> +}
> +
>  /*
>   * struct ufs_hba_qcom_vops - UFS QCOM specific variant operations
>   *
> @@ -1833,6 +1864,7 @@ static const struct ufs_hba_variant_ops
> ufs_hba_qcom_vops = {
>         .op_runtime_config      = ufs_qcom_op_runtime_config,
>         .get_outstanding_cqs    = ufs_qcom_get_outstanding_cqs,
>         .config_esi             = ufs_qcom_config_esi,
> +       .freq_to_gear_speed     = ufs_qcom_freq_to_gear_speed,
>  };
> 
>  /**
> --
> 2.34.1