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Commit 79c8bd15 authored by Robert Hancock's avatar Robert Hancock Committed by David S. Miller
Browse files

net: dsa: microchip: Support optional 125MHz SYNCLKO output 



The KSZ9477 series chips have a SYNCLKO pin which by default outputs a
25MHz clock, but some board setups require a 125MHz clock instead. Added
a microchip,synclko-125 device tree property to allow indicating a
125MHz clock output is required.

Signed-off-by: default avatarRobert Hancock <hancock@sedsystems.ca>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1fc33199

Documentation/devicetree/bindings/net/dsa/ksz.txt

+2 −0
Original line number Diff line number Diff line
@@ -16,6 +16,8 @@ Required properties: 
Optional properties:



- reset-gpios		: Should be a gpio specifier for a reset line

- microchip,synclko-125 : Set if the output SYNCLKO frequency should be set to

			  125MHz instead of 25MHz.



See Documentation/devicetree/bindings/net/dsa/dsa.txt for a list of additional

required and optional properties.

drivers/net/dsa/microchip/ksz9477.c

+4 −0
Original line number Diff line number Diff line
@@ -258,6 +258,10 @@ static int ksz9477_reset_switch(struct ksz_device *dev) 
	data16 |= (BROADCAST_STORM_VALUE * BROADCAST_STORM_PROT_RATE) / 100;

	ksz_write16(dev, REG_SW_MAC_CTRL_2, data16);



	if (dev->synclko_125)

		ksz_write8(dev, REG_SW_GLOBAL_OUTPUT_CTRL__1,

			   SW_ENABLE_REFCLKO | SW_REFCLKO_IS_125MHZ);



	return 0;

}

drivers/net/dsa/microchip/ksz_common.c

+2 −0
Original line number Diff line number Diff line
@@ -460,6 +460,8 @@ int ksz_switch_register(struct ksz_device *dev, 
		ret = of_get_phy_mode(dev->dev->of_node);

		if (ret >= 0)

			dev->interface = ret;

		dev->synclko_125 = of_property_read_bool(dev->dev->of_node,

							 "microchip,synclko-125");

	}



	ret = dsa_register_switch(dev->ds);

drivers/net/dsa/microchip/ksz_priv.h

+1 −0
Original line number Diff line number Diff line
@@ -78,6 +78,7 @@ struct ksz_device { 
	phy_interface_t interface;

	u32 regs_size;

	bool phy_errata_9477;

	bool synclko_125;



	struct vlan_table *vlan_cache;