[U-Boot] [PATCH 1/2][v2] net: phy: introduce a quirk PHY_FLAG_BROKEN_RESET

[shh.xie at gmail.com]

From: Shaohui Xie <Shaohui.Xie at nxp.com>

Current driver always performs a phy soft reset when connecting the phy
device, but soft reset is not always supported by a phy device, so
introduce a quirk PHY_FLAG_BROKEN_RESET to let such a phy device to skip
soft reset. This commit uses 'flags' of phy device structure to store the
quirk.

Signed-off-by: Shaohui Xie <Shaohui.Xie at nxp.com>
---
changes in v2:
1. use PHY_FLAG_BROKEN_RESET instead of PHY_BROKEN_RESET
2. use '&' to check the phydev->flags instead of '=='

 drivers/net/phy/phy.c | 3 +++
 include/phy.h         | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 9bf231c..9126d5d 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -741,6 +741,9 @@ int phy_reset(struct phy_device *phydev)
 	int timeout = 500;
 	int devad = MDIO_DEVAD_NONE;
 
+	if (phydev->flags & PHY_FLAG_BROKEN_RESET)
+		return 0;
+
 #ifdef CONFIG_PHYLIB_10G
 	/* If it's 10G, we need to issue reset through one of the MMDs */
 	if (is_10g_interface(phydev->interface)) {
diff --git a/include/phy.h b/include/phy.h
index e030c9f..09bbe48 100644
--- a/include/phy.h
+++ b/include/phy.h
@@ -17,6 +17,8 @@
 
 #define PHY_MAX_ADDR 32
 
+#define PHY_FLAG_BROKEN_RESET	(1 << 0) /* soft reset not supported */
+
 #define PHY_DEFAULT_FEATURES	(SUPPORTED_Autoneg | \
 				 SUPPORTED_TP | \
 				 SUPPORTED_MII)
-- 
2.1.0.27.g96db324