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phy: qcom-ufs: Correct usage of regulator_get()

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When regulator_get() tries to resolve a regulator supply but fail to
find a matching property in DeviceTree it returns a dummy regulator, if
a matching supply is specified but unavailable the regulator core will
return an error.

Based on this we should not ignore errors upon failing to acquire the
optional "vddp-ref-clk" supply.

Reviewed-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Bjorn Andersson 2017-01-22 13:17:47 -08:00 committed by Kishon Vijay Abraham I
parent e7d5e41216
commit 3471426f6d
1 changed files with 7 additions and 14 deletions
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21
drivers/phy/phy-qcom-ufs.c
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@ -210,8 +210,9 @@ int ufs_qcom_phy_init_clks(struct ufs_qcom_phy *phy_common)
}
EXPORT_SYMBOL_GPL(ufs_qcom_phy_init_clks);
static int __ufs_qcom_phy_init_vreg(struct device *dev,
struct ufs_qcom_phy_vreg *vreg, const char *name, bool optional)
static int ufs_qcom_phy_init_vreg(struct device *dev,
struct ufs_qcom_phy_vreg *vreg,
const char *name)
{
int err = 0;
@ -221,9 +222,7 @@ static int __ufs_qcom_phy_init_vreg(struct device *dev,
vreg->reg = devm_regulator_get(dev, name);
if (IS_ERR(vreg->reg)) {
err = PTR_ERR(vreg->reg);
vreg->reg = NULL;
if (!optional)
dev_err(dev, "failed to get %s, %d\n", name, err);
dev_err(dev, "failed to get %s, %d\n", name, err);
goto out;
}
@ -263,12 +262,6 @@ static int __ufs_qcom_phy_init_vreg(struct device *dev,
return err;
}
static int ufs_qcom_phy_init_vreg(struct device *dev,
struct ufs_qcom_phy_vreg *vreg, const char *name)
{
return __ufs_qcom_phy_init_vreg(dev, vreg, name, false);
}
int ufs_qcom_phy_init_vregulators(struct ufs_qcom_phy *phy_common)
{
int err;
@ -284,9 +277,9 @@ int ufs_qcom_phy_init_vregulators(struct ufs_qcom_phy *phy_common)
if (err)
goto out;
/* vddp-ref-clk-* properties are optional */
__ufs_qcom_phy_init_vreg(phy_common->dev, &phy_common->vddp_ref_clk,
"vddp-ref-clk", true);
err = ufs_qcom_phy_init_vreg(phy_common->dev, &phy_common->vddp_ref_clk,
"vddp-ref-clk");
out:
return err;
}