From 86dc1342bcbb1905b2ac9653a559b303f62bd728 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 19 Nov 2014 12:59:19 +0100 Subject: [PATCH] net: phy: micrel: add support for clock-mode select to KSZ8081/KSZ8091 Micrel KSZ8081 and KSZ8091 PHYs have the RMII Reference Clock Select bit, which is used to select 25 or 50 MHz clock mode. Note that on some revisions of the PHY (e.g. KSZ8081RND) the function of this bit is inverted so that setting it enables 25 rather than 50 MHz mode. Add a new device-tree property "micrel,rmii-reference-clock-select-25-mhz" to describe this. Signed-off-by: Johan Hovold Signed-off-by: David S. Miller --- Documentation/devicetree/bindings/net/micrel.txt | 4 ++-- drivers/net/phy/micrel.c | 11 ++++++----- 2 files changed, 8 insertions(+), 7 deletions(-) diff --git a/Documentation/devicetree/bindings/net/micrel.txt b/Documentation/devicetree/bindings/net/micrel.txt index 30062fae5623..a1bab5eaae02 100644 --- a/Documentation/devicetree/bindings/net/micrel.txt +++ b/Documentation/devicetree/bindings/net/micrel.txt @@ -22,5 +22,5 @@ Optional properties: - clocks, clock-names: contains clocks according to the common clock bindings. supported clocks: - - KSZ8021, KSZ8031: "rmii-ref": The RMII refence input clock. Used - to determine the XI input clock. + - KSZ8021, KSZ8031, KSZ8081, KSZ8091: "rmii-ref": The RMII + refence input clock. Used to determine the XI input clock. diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c index d2e790cd3651..04fbee846b66 100644 --- a/drivers/net/phy/micrel.c +++ b/drivers/net/phy/micrel.c @@ -102,6 +102,7 @@ static const struct kszphy_type ksz8051_type = { static const struct kszphy_type ksz8081_type = { .led_mode_reg = MII_KSZPHY_CTRL_2, .has_broadcast_disable = true, + .has_rmii_ref_clk_sel = true, }; static int kszphy_extended_write(struct phy_device *phydev, @@ -548,16 +549,16 @@ static int kszphy_probe(struct phy_device *phydev) clk = devm_clk_get(&phydev->dev, "rmii-ref"); if (!IS_ERR(clk)) { unsigned long rate = clk_get_rate(clk); + bool rmii_ref_clk_sel_25_mhz; priv->rmii_ref_clk_sel = type->has_rmii_ref_clk_sel; + rmii_ref_clk_sel_25_mhz = of_property_read_bool(np, + "micrel,rmii-reference-clock-select-25-mhz"); - /* FIXME: add support for PHY revisions that have this bit - * inverted (e.g. through new property or based on PHY ID). - */ if (rate > 24500000 && rate < 25500000) { - priv->rmii_ref_clk_sel_val = false; + priv->rmii_ref_clk_sel_val = rmii_ref_clk_sel_25_mhz; } else if (rate > 49500000 && rate < 50500000) { - priv->rmii_ref_clk_sel_val = true; + priv->rmii_ref_clk_sel_val = !rmii_ref_clk_sel_25_mhz; } else { dev_err(&phydev->dev, "Clock rate out of range: %ld\n", rate); return -EINVAL; -- 2.20.1