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| author | Robert Hancock <hancock@sedsystems.ca> | 2019-06-12 14:49:06 -0600 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-06-14 19:11:53 -0700 |
| commit | 79c8bd15b61eca456c49d20d083f02a2614b4d12 (patch) | |
| tree | a1a6a97dabe62a2e9abe505cdd06527ff1895bd4 | |
| parent | 1fc33199185ddb2296270a7ae8114c40ab28b17b (diff) | |
| download | linux-79c8bd15b61eca456c49d20d083f02a2614b4d12.tar.gz | |
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: Robert Hancock <hancock@sedsystems.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | Documentation/devicetree/bindings/net/dsa/ksz.txt | 2 | ||||
| -rw-r--r-- | drivers/net/dsa/microchip/ksz9477.c | 4 | ||||
| -rw-r--r-- | drivers/net/dsa/microchip/ksz_common.c | 2 | ||||
| -rw-r--r-- | drivers/net/dsa/microchip/ksz_priv.h | 1 |
4 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/dsa/ksz.txt b/Documentation/devicetree/bindings/net/dsa/ksz.txt index e7db7268fd0f..4ac21cef370e 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 7be6d848b69f..508380f80875 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 39dace8e3512..40c57d84816f 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 724301df91db..c615d2a81dd5 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; |