| 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 |
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 --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);
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(-)