[PATCH v6 2/5] include: linux: phy: Add phy attribute "type" and associated helpers

[Krishna Kurapati]

In cases like USB High-speed phys which can be either USB2 or EUSB2, it is
required to know the type of phy (rather than the operating mode) because
DP and DM interrupt lines need to be configured differently for each of
them.

Add support to cache the PHY_TYPE and add the following helpers:

- phy_set_type() for the phy drivers (like m31_eusb2 or snps-eusb2) to
declare what type of PHY they are (in this case PHY_TYPE_EUSB2).

- phy_get_type() for the consumers (like USB controllers) to query the
type of phy connected to them.

Signed-off-by: Krishna Kurapati <krishna.kurapati@xxxxxxxxxxxxxxxx>
---
 include/linux/phy/phy.h | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index ea47975e288a..038c2b58bbe1 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -21,6 +21,8 @@
 #include <linux/phy/phy-lvds.h>
 #include <linux/phy/phy-mipi-dphy.h>
 
+#include <dt-bindings/phy/phy.h>
+
 struct phy;
 
 enum phy_mode {
@@ -152,11 +154,13 @@ struct phy_ops {
  * @bus_width: Data path width implemented by PHY
  * @max_link_rate: Maximum link rate supported by PHY (units to be decided by producer and consumer)
  * @mode: PHY mode
+ * @type: PHY type
  */
 struct phy_attrs {
 	u32			bus_width;
 	u32			max_link_rate;
 	enum phy_mode		mode;
+	int			type;
 };
 
 /**
@@ -262,6 +266,20 @@ static inline enum phy_mode phy_get_mode(struct phy *phy)
 {
 	return phy->attrs.mode;
 }
+
+static inline int phy_get_type(struct phy *phy)
+{
+	if (phy)
+		return phy->attrs.type;
+
+	return PHY_NONE;
+}
+
+static inline void phy_set_type(struct phy *phy, int type)
+{
+	phy->attrs.type = type;
+}
+
 int phy_reset(struct phy *phy);
 int phy_calibrate(struct phy *phy);
 int phy_notify_connect(struct phy *phy, int port);
@@ -393,6 +411,15 @@ static inline enum phy_mode phy_get_mode(struct phy *phy)
 	return PHY_MODE_INVALID;
 }
 
+static inline int phy_get_type(struct phy *phy)
+{
+	return PHY_NONE;
+}
+
+static inline void phy_set_type(struct phy *phy, int type)
+{
+}
+
 static inline int phy_reset(struct phy *phy)
 {
 	if (!phy)

-- 
2.34.1