From: Robert Hancock <hancock@sedsystems.ca>
To: netdev@vger.kernel.org
Cc: woojung.huh@microchip.com, UNGLinuxDriver@microchip.com,
andrew@lunn.ch, vivien.didelot@gmail.com, f.fainelli@gmail.com,
Robert Hancock <hancock@sedsystems.ca>
Subject: [PATCH net-next 2/2] net: dsa: microchip: Support optional 125MHz SYNCLKO output
Date: Wed, 12 Jun 2019 14:49:06 -0600 [thread overview]
Message-ID: <1560372546-3153-3-git-send-email-hancock@sedsystems.ca> (raw)
In-Reply-To: <1560372546-3153-1-git-send-email-hancock@sedsystems.ca>
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: Robert Hancock <hancock@sedsystems.ca>
---
Documentation/devicetree/bindings/net/dsa/ksz.txt | 2 ++
drivers/net/dsa/microchip/ksz9477.c | 4 ++++
drivers/net/dsa/microchip/ksz_common.c | 2 ++
drivers/net/dsa/microchip/ksz_priv.h | 1 +
4 files changed, 9 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/dsa/ksz.txt b/Documentation/devicetree/bindings/net/dsa/ksz.txt
index e7db726..4ac21ce 100644
--- a/Documentation/devicetree/bindings/net/dsa/ksz.txt
+++ b/Documentation/devicetree/bindings/net/dsa/ksz.txt
@@ -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.
diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c
index 7be6d84..508380f 100644
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c
@@ -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;
}
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 39dace8..40c57d8 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -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);
diff --git a/drivers/net/dsa/microchip/ksz_priv.h b/drivers/net/dsa/microchip/ksz_priv.h
index 724301d..c615d2a 100644
--- a/drivers/net/dsa/microchip/ksz_priv.h
+++ b/drivers/net/dsa/microchip/ksz_priv.h
@@ -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;
--
1.8.3.1
next prev parent reply other threads:[~2019-06-12 20:49 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-12 20:49 [PATCH net-next 0/2] Microchip KSZ driver enhancements Robert Hancock
2019-06-12 20:49 ` [PATCH net-next 1/2] net: dsa: microchip: Add PHY errata workarounds Robert Hancock
2019-06-12 20:49 ` Robert Hancock [this message]
2019-06-15 2:12 ` [PATCH net-next 0/2] Microchip KSZ driver enhancements David Miller
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