The number of periodic output pins available is hardcoded to 2 while
KSZ8463 has 12 pins that can be used as periodic outputs.

Add an n_pin attribute to the struct ksz_chip_data to make this setting
configurable.
Set it to 2 for all the PTP-capable switches.

Signed-off-by: Bastien Curutchet (Schneider Electric) <bastien.curutchet@bootlin.com>
---
 drivers/net/dsa/microchip/ksz_common.c | 10 ++++++++++
 drivers/net/dsa/microchip/ksz_common.h |  1 +
 drivers/net/dsa/microchip/ksz_ptp.c    |  4 ++--
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 1a9d6f83a023..d01fba253af5 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -1194,6 +1194,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.ptp_capable = true,
 		.wr_table = &ksz8563_register_set,
 		.rd_table = &ksz8563_register_set,
+		.n_pins = 2,
 	},
 
 	[KSZ8795] = {
@@ -1414,6 +1415,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.sgmii_port = 7,
 		.wr_table = &ksz9477_register_set,
 		.rd_table = &ksz9477_register_set,
+		.n_pins = 2,
 	},
 
 	[KSZ9896] = {
@@ -1544,6 +1546,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.internal_phy = {true, true, false},
 		.gbit_capable = {true, true, true},
 		.ptp_capable = true,
+		.n_pins = 2,
 	},
 
 	[KSZ8567] = {
@@ -1581,6 +1584,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.gbit_capable	= {false, false, false, false, false,
 				   true, true},
 		.ptp_capable = true,
+		.n_pins = 2,
 	},
 
 	[KSZ9567] = {
@@ -1615,6 +1619,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 				   true, false, false},
 		.gbit_capable	= {true, true, true, true, true, true, true},
 		.ptp_capable = true,
+		.n_pins = 2,
 	},
 
 	[LAN9370] = {
@@ -1646,6 +1651,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.supports_rgmii = {false, false, false, false, true},
 		.internal_phy = {true, true, true, true, false},
 		.ptp_capable = true,
+		.n_pins = 2,
 	},
 
 	[LAN9371] = {
@@ -1677,6 +1683,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.supports_rgmii = {false, false, false, false, true, true},
 		.internal_phy = {true, true, true, true, false, false},
 		.ptp_capable = true,
+		.n_pins = 2,
 	},
 
 	[LAN9372] = {
@@ -1712,6 +1719,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.internal_phy	= {true, true, true, true,
 				   false, false, true, true},
 		.ptp_capable = true,
+		.n_pins = 2,
 	},
 
 	[LAN9373] = {
@@ -1747,6 +1755,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.internal_phy	= {true, true, true, false,
 				   false, false, true, true},
 		.ptp_capable = true,
+		.n_pins = 2,
 	},
 
 	[LAN9374] = {
@@ -1782,6 +1791,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.internal_phy	= {true, true, true, true,
 				   false, false, true, true},
 		.ptp_capable = true,
+		.n_pins = 2,
 	},
 
 	[LAN9646] = {
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index cbe98494578c..c678fc6597dc 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -139,6 +139,7 @@ struct ksz_chip_data {
 	u8 sgmii_port;
 	const struct regmap_access_table *wr_table;
 	const struct regmap_access_table *rd_table;
+	const u8 n_pins;
 };
 
 struct ksz_irq {
diff --git a/drivers/net/dsa/microchip/ksz_ptp.c b/drivers/net/dsa/microchip/ksz_ptp.c
index 39cc70d65900..c92936bf78d3 100644
--- a/drivers/net/dsa/microchip/ksz_ptp.c
+++ b/drivers/net/dsa/microchip/ksz_ptp.c
@@ -1050,14 +1050,14 @@ int ksz_ptp_clock_register(struct dsa_switch *ds)
 	ptp_data->caps.do_aux_work	= ksz_ptp_do_aux_work;
 	ptp_data->caps.enable		= ksz_ptp_enable;
 	ptp_data->caps.verify		= ksz_ptp_verify_pin;
-	ptp_data->caps.n_pins		= KSZ_PTP_N_GPIO;
+	ptp_data->caps.n_pins		= dev->info->n_pins;
 	ptp_data->caps.n_per_out	= 3;
 
 	ret = ksz_ptp_start_clock(dev);
 	if (ret)
 		return ret;
 
-	for (i = 0; i < KSZ_PTP_N_GPIO; i++) {
+	for (i = 0; i < dev->info->n_pins; i++) {
 		struct ptp_pin_desc *ptp_pin = &ptp_data->pin_config[i];
 
 		snprintf(ptp_pin->name,

-- 
2.55.0