[PATCH net-next v2 07/10] net: dsa: microchip: implement .{get/set}_wol only if needed

["Bastien Curutchet (Schneider Electric)" <bastien.curutchet@bootlin.com>]

All the KSZ switches use common {get/set}_wol operations while only the
ksz9477 and the ksz87xx families really support it. These operations are
optional so there is no point implementing them to return -EOPNOTSUPP.

Remove the {get/set}_wol callbacks from the switch operations for the
ksz88xx, the ksz8463 and the lan937x families.
Remove the family check from the common {get/set}_wol implementation.

Note that is_ksz9477() is only true for the KSZ9477 so this change will
also add WoL support for the other switches using the
ksz9477_switch_ops. I checked their datasheet, they implement the same
PME_WOL registers, at the same addresses, so this should go fine.
Modify the ksz_wol_pre_shutdown() initial check to ensure consistency in
the WoL handling for these non-KSZ9477 switches using ksz9477_switch_ops.

Signed-off-by: Bastien Curutchet (Schneider Electric) <bastien.curutchet@bootlin.com>
---
 drivers/net/dsa/microchip/ksz8.c         |  4 ----
 drivers/net/dsa/microchip/ksz_common.c   | 12 ++++--------
 drivers/net/dsa/microchip/lan937x_main.c |  2 --
 3 files changed, 4 insertions(+), 14 deletions(-)

diff --git a/drivers/net/dsa/microchip/ksz8.c b/drivers/net/dsa/microchip/ksz8.c
index 7b4b46db1ef6..690e1b275992 100644
--- a/drivers/net/dsa/microchip/ksz8.c
+++ b/drivers/net/dsa/microchip/ksz8.c
@@ -2467,8 +2467,6 @@ const struct dsa_switch_ops ksz8463_switch_ops = {
 	.get_pause_stats	= ksz_get_pause_stats,
 	.port_change_mtu	= ksz8_change_mtu,
 	.port_max_mtu		= ksz_max_mtu,
-	.get_wol		= ksz_get_wol,
-	.set_wol		= ksz_set_wol,
 	.suspend		= ksz_suspend,
 	.resume			= ksz_resume,
 	.get_ts_info		= ksz_get_ts_info,
@@ -2578,8 +2576,6 @@ const struct dsa_switch_ops ksz88xx_switch_ops = {
 	.get_pause_stats	= ksz_get_pause_stats,
 	.port_change_mtu	= ksz8_change_mtu,
 	.port_max_mtu		= ksz_max_mtu,
-	.get_wol		= ksz_get_wol,
-	.set_wol		= ksz_set_wol,
 	.suspend		= ksz_suspend,
 	.resume			= ksz_resume,
 	.get_ts_info		= ksz_get_ts_info,
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index bebf697ec60a..809a0bc3c01e 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -3756,9 +3756,6 @@ void ksz_get_wol(struct dsa_switch *ds, int port,
 	u8 pme_ctrl;
 	int ret;
 
-	if (!is_ksz9477(dev) && !ksz_is_ksz87xx(dev))
-		return;
-
 	if (!dev->wakeup_source)
 		return;
 
@@ -3809,9 +3806,6 @@ int ksz_set_wol(struct dsa_switch *ds, int port,
 	if (wol->wolopts & ~(WAKE_PHY | WAKE_MAGIC))
 		return -EINVAL;
 
-	if (!is_ksz9477(dev) && !ksz_is_ksz87xx(dev))
-		return -EOPNOTSUPP;
-
 	if (!dev->wakeup_source)
 		return -EOPNOTSUPP;
 
@@ -3871,12 +3865,13 @@ static void ksz_wol_pre_shutdown(struct ksz_device *dev)
 {
 	const struct ksz_dev_ops *ops = dev->dev_ops;
 	const u16 *regs = dev->info->regs;
+	struct dsa_switch *ds = dev->ds;
 	u8 pme_pin_en = PME_ENABLE;
 	bool wol_enabled = false;
 	struct dsa_port *dp;
 	int ret;
 
-	if (!is_ksz9477(dev) && !ksz_is_ksz87xx(dev))
+	if (!ds->ops->set_wol)
 		return;
 
 	if (!dev->wakeup_source)
@@ -3924,7 +3919,8 @@ int ksz_port_set_mac_address(struct dsa_switch *ds, int port,
 	 */
 	wol.wolopts = 0;
 
-	ksz_get_wol(ds, dp->index, &wol);
+	if (ds->ops->get_wol)
+		ds->ops->get_wol(ds, dp->index, &wol);
 	if (wol.wolopts & WAKE_MAGIC) {
 		dev_err(ds->dev,
 			"Cannot change MAC address on port %d with active Wake on Magic Packet\n",
diff --git a/drivers/net/dsa/microchip/lan937x_main.c b/drivers/net/dsa/microchip/lan937x_main.c
index e1aba93d1438..6b1306e81558 100644
--- a/drivers/net/dsa/microchip/lan937x_main.c
+++ b/drivers/net/dsa/microchip/lan937x_main.c
@@ -893,8 +893,6 @@ const struct dsa_switch_ops lan937x_switch_ops = {
 	.get_pause_stats	= ksz_get_pause_stats,
 	.port_change_mtu	= lan937x_change_mtu,
 	.port_max_mtu		= ksz_max_mtu,
-	.get_wol		= ksz_get_wol,
-	.set_wol		= ksz_set_wol,
 	.suspend		= ksz_suspend,
 	.resume			= ksz_resume,
 	.get_ts_info		= ksz_get_ts_info,

-- 
2.54.0