diff mbox series

[v3,1/8] scsi: ufs: ufs-mediatek: Remove useless mediatek,ufs-support-va09 property

Message ID 20240415075406.47543-2-angelogioacchino.delregno@collabora.com (mailing list archive)
State New, archived
Headers show
Series MediaTek UFS fixes and cleanups - Part 1 | expand

Commit Message

AngeloGioacchino Del Regno April 15, 2024, 7:53 a.m. UTC
Remove checking the mediatek,ufs-support-va09 property to decide
whether to try to support the VA09 regulator handling and change
the ufs_mtk_init_va09_pwr_ctrl() function to make it call
devm_regulator_get_optional(): if the regulator is present, then
we set the UFS_MTK_CAP_VA09_PWR_CTRL, effectively enabling the
handling of the VA09 regulator based on that.

Also, make sure to pass the return value of the call to
devm_regulator_get_optional() to the probe function, so that
if it returns a probe deferral, the appropriate action will be
taken.

While at it, remove the error print (disguised as info...) when
the va09 regulator was not found.

Fixes: ac8c2459091c ("scsi: ufs-mediatek: Decouple features from platform bindings")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 drivers/ufs/host/ufs-mediatek.c | 34 +++++++++++++++++++++++----------
 1 file changed, 24 insertions(+), 10 deletions(-)

Comments

Peter Wang (王信友) April 15, 2024, 9:03 a.m. UTC | #1
On Mon, 2024-04-15 at 09:53 +0200, AngeloGioacchino Del Regno wrote:
> Remove checking the mediatek,ufs-support-va09 property to decide
> whether to try to support the VA09 regulator handling and change
> the ufs_mtk_init_va09_pwr_ctrl() function to make it call
> devm_regulator_get_optional(): if the regulator is present, then
> we set the UFS_MTK_CAP_VA09_PWR_CTRL, effectively enabling the
> handling of the VA09 regulator based on that.
> 
> Also, make sure to pass the return value of the call to
> devm_regulator_get_optional() to the probe function, so that
> if it returns a probe deferral, the appropriate action will be
> taken.
> 
> While at it, remove the error print (disguised as info...) when
> the va09 regulator was not found.
> 
> Fixes: ac8c2459091c ("scsi: ufs-mediatek: Decouple features from
> platform bindings")
> Signed-off-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@collabora.com>
> ---
>  drivers/ufs/host/ufs-mediatek.c | 34 +++++++++++++++++++++++------
> ----
>  1 file changed, 24 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-
> mediatek.c
> index 0b0c923b1d7b..e4643ac49033 100644
> --- a/drivers/ufs/host/ufs-mediatek.c
> +++ b/drivers/ufs/host/ufs-mediatek.c
> @@ -622,27 +622,38 @@ static void ufs_mtk_init_boost_crypt(struct
> ufs_hba *hba)
>  	return;
>  }
>  
> -static void ufs_mtk_init_va09_pwr_ctrl(struct ufs_hba *hba)
> +static int ufs_mtk_init_va09_pwr_ctrl(struct ufs_hba *hba)
>  {
>  	struct ufs_mtk_host *host = ufshcd_get_variant(hba);
> +	int ret;
>  
> -	host->reg_va09 = regulator_get(hba->dev, "va09");
> -	if (IS_ERR(host->reg_va09))
> -		dev_info(hba->dev, "failed to get va09");
> -	else
> -		host->caps |= UFS_MTK_CAP_VA09_PWR_CTRL;
> +	host->reg_va09 = devm_regulator_get_optional(hba->dev, "va09");
> 

Hi Angelo,

Mediatek may have pmic va09 but is not used by ufs.
The real va09 use module will have abnormal behavior if ufs control his
power.

Thanks.
Peter



> +	if (IS_ERR(host->reg_va09)) {
> +		ret = PTR_ERR(host->reg_va09);
> +
> +		/* Return an error only if this is a deferral */
> +		if (ret == -EPROBE_DEFER)
> +			return ret;
> +
> +		return 0;
> +	}
> +
> +	host->caps |= UFS_MTK_CAP_VA09_PWR_CTRL;
> +	return 0;
>  }
>  
> -static void ufs_mtk_init_host_caps(struct ufs_hba *hba)
> +static int ufs_mtk_init_host_caps(struct ufs_hba *hba)
>  {
>  	struct ufs_mtk_host *host = ufshcd_get_variant(hba);
>  	struct device_node *np = hba->dev->of_node;
> +	int ret;
>  
>  	if (of_property_read_bool(np, "mediatek,ufs-boost-crypt"))
>  		ufs_mtk_init_boost_crypt(hba);
>  
> -	if (of_property_read_bool(np, "mediatek,ufs-support-va09"))
> -		ufs_mtk_init_va09_pwr_ctrl(hba);
> +	ret = ufs_mtk_init_va09_pwr_ctrl(hba);
> +	if (ret)
> +		return ret;
>  
>  	if (of_property_read_bool(np, "mediatek,ufs-disable-ah8"))
>  		host->caps |= UFS_MTK_CAP_DISABLE_AH8;
> @@ -663,6 +674,7 @@ static void ufs_mtk_init_host_caps(struct ufs_hba
> *hba)
>  		host->caps |= UFS_MTK_CAP_RTFF_MTCMOS;
>  
>  	dev_info(hba->dev, "caps: 0x%x", host->caps);
> +	return 0;
>  }
>  
>  static void ufs_mtk_scale_perf(struct ufs_hba *hba, bool scale_up)
> @@ -985,7 +997,9 @@ static int ufs_mtk_init(struct ufs_hba *hba)
>  	}
>  
>  	/* Initialize host capability */
> -	ufs_mtk_init_host_caps(hba);
> +	err = ufs_mtk_init_host_caps(hba);
> +	if (err)
> +		goto out;
>  
>  	ufs_mtk_init_mcq_irq(hba);
>
diff mbox series

Patch

diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index 0b0c923b1d7b..e4643ac49033 100644
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -622,27 +622,38 @@  static void ufs_mtk_init_boost_crypt(struct ufs_hba *hba)
 	return;
 }
 
-static void ufs_mtk_init_va09_pwr_ctrl(struct ufs_hba *hba)
+static int ufs_mtk_init_va09_pwr_ctrl(struct ufs_hba *hba)
 {
 	struct ufs_mtk_host *host = ufshcd_get_variant(hba);
+	int ret;
 
-	host->reg_va09 = regulator_get(hba->dev, "va09");
-	if (IS_ERR(host->reg_va09))
-		dev_info(hba->dev, "failed to get va09");
-	else
-		host->caps |= UFS_MTK_CAP_VA09_PWR_CTRL;
+	host->reg_va09 = devm_regulator_get_optional(hba->dev, "va09");
+	if (IS_ERR(host->reg_va09)) {
+		ret = PTR_ERR(host->reg_va09);
+
+		/* Return an error only if this is a deferral */
+		if (ret == -EPROBE_DEFER)
+			return ret;
+
+		return 0;
+	}
+
+	host->caps |= UFS_MTK_CAP_VA09_PWR_CTRL;
+	return 0;
 }
 
-static void ufs_mtk_init_host_caps(struct ufs_hba *hba)
+static int ufs_mtk_init_host_caps(struct ufs_hba *hba)
 {
 	struct ufs_mtk_host *host = ufshcd_get_variant(hba);
 	struct device_node *np = hba->dev->of_node;
+	int ret;
 
 	if (of_property_read_bool(np, "mediatek,ufs-boost-crypt"))
 		ufs_mtk_init_boost_crypt(hba);
 
-	if (of_property_read_bool(np, "mediatek,ufs-support-va09"))
-		ufs_mtk_init_va09_pwr_ctrl(hba);
+	ret = ufs_mtk_init_va09_pwr_ctrl(hba);
+	if (ret)
+		return ret;
 
 	if (of_property_read_bool(np, "mediatek,ufs-disable-ah8"))
 		host->caps |= UFS_MTK_CAP_DISABLE_AH8;
@@ -663,6 +674,7 @@  static void ufs_mtk_init_host_caps(struct ufs_hba *hba)
 		host->caps |= UFS_MTK_CAP_RTFF_MTCMOS;
 
 	dev_info(hba->dev, "caps: 0x%x", host->caps);
+	return 0;
 }
 
 static void ufs_mtk_scale_perf(struct ufs_hba *hba, bool scale_up)
@@ -985,7 +997,9 @@  static int ufs_mtk_init(struct ufs_hba *hba)
 	}
 
 	/* Initialize host capability */
-	ufs_mtk_init_host_caps(hba);
+	err = ufs_mtk_init_host_caps(hba);
+	if (err)
+		goto out;
 
 	ufs_mtk_init_mcq_irq(hba);