[PATCH 2/3] scsi: ufs: qcom: Clarify the comment of core_reset property

[Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>]

core_reset is not an optional property for the platforms supported in
upstream. Only for the non-upstreamed legacy platforms it is optional.
But somehow a few of the upstreamed platforms do not pass this property
by mistake.

So clarify the comment to make it clear that even though core_reset is
required, it is kept as optional to support the DTs that do not pass this
property.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/ufs/host/ufs-qcom.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 39eef470f8fa..32760506dfeb 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -1027,7 +1027,11 @@ static int ufs_qcom_init(struct ufs_hba *hba)
 	host->hba = hba;
 	ufshcd_set_variant(hba, host);
 
-	/* Setup the optional reset control of HCI */
+	/*
+	 * Even though core_reset is required on all platforms, some DTs never
+	 * passed this property. So we have to keep it optional for supporting
+	 * them.
+	 */
 	host->core_reset = devm_reset_control_get_optional(hba->dev, "rst");
 	if (IS_ERR(host->core_reset)) {
 		err = dev_err_probe(dev, PTR_ERR(host->core_reset),

-- 
2.25.1