From: Mugunthan V N <mugunthan...@ti.com>
Add support for programmable MAC impedance configuration and
fix typo in DT impedance parameters names.
Signed-off-by: Mugunthan V N <mugunthan...@ti.com>
Signed-off-by: Grygorii Strashko <grygorii.stras...@ti.com>
---
no functional changes, just cc list corrected
arch/arm/dts/dra72-evm-revc.dts | 4 ++--
drivers/net/phy/ti.c | 31 +++++++++++++++++++++++++++++++
2 files changed, 33 insertions(+), 2 deletions(-)
diff --git a/arch/arm/dts/dra72-evm-revc.dts b/arch/arm/dts/dra72-evm-revc.dts
index 5a1bb34..bc814f1 100644
--- a/arch/arm/dts/dra72-evm-revc.dts
+++ b/arch/arm/dts/dra72-evm-revc.dts
@@ -67,7 +67,7 @@
ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_25_NS>;
ti,tx-internal-delay = <DP83867_RGMIIDCTL_250_PS>;
ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_8_B_NIB>;
- ti,min-output-imepdance;
+ ti,min-output-impedance;
};
dp83867_1: ethernet-phy@3 {
@@ -75,6 +75,6 @@
ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_25_NS>;
ti,tx-internal-delay = <DP83867_RGMIIDCTL_250_PS>;
ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_8_B_NIB>;
- ti,min-output-imepdance;
+ ti,min-output-impedance;
};
};
diff --git a/drivers/net/phy/ti.c b/drivers/net/phy/ti.c
index c55dd97..21b181a 100644
--- a/drivers/net/phy/ti.c
+++ b/drivers/net/phy/ti.c
@@ -27,6 +27,7 @@ DECLARE_GLOBAL_DATA_PTR;
/* Extended Registers */
#define DP83867_RGMIICTL 0x0032
#define DP83867_RGMIIDCTL 0x0086
+#define DP83867_IO_MUX_CFG 0x0170
#define DP83867_SW_RESET BIT(15)
#define DP83867_SW_RESTART BIT(14)
@@ -84,10 +85,17 @@ DECLARE_GLOBAL_DATA_PTR;
#define DEFAULT_TX_ID_DELAY DP83867_RGMIIDCTL_2_75_NS
#define DEFAULT_FIFO_DEPTH DP83867_PHYCR_FIFO_DEPTH_4_B_NIB
+/* IO_MUX_CFG bits */
+#define DP83867_IO_MUX_CFG_IO_IMPEDANCE_CTRL 0x1f
+
+#define DP83867_IO_MUX_CFG_IO_IMPEDANCE_MAX 0x0
+#define DP83867_IO_MUX_CFG_IO_IMPEDANCE_MIN 0x1f
+
struct dp83867_private {
int rx_id_delay;
int tx_id_delay;
int fifo_depth;
+ int io_impedance;
};
/**
@@ -166,6 +174,15 @@ static int dp83867_of_init(struct phy_device *phydev)
{
struct dp83867_private *dp83867 = phydev->priv;
struct udevice *dev = phydev->dev;
+ int node = dev->of_offset;
+ const void *fdt = gd->fdt_blob;
+
+ if (fdtdec_get_bool(fdt, node, "ti,max-output-impedance"))
+ dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MAX;
+ else if (fdtdec_get_bool(fdt, node, "ti,min-output-impedance"))
+ dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MIN;
+ else
+ dp83867->io_impedance = -EINVAL;
dp83867->rx_id_delay = fdtdec_get_uint(gd->fdt_blob, dev->of_offset,
"ti,rx-internal-delay", -1);
@@ -186,6 +203,7 @@ static int dp83867_of_init(struct phy_device *phydev)
dp83867->rx_id_delay = DEFAULT_RX_ID_DELAY;
dp83867->tx_id_delay = DEFAULT_TX_ID_DELAY;
dp83867->fifo_depth = DEFAULT_FIFO_DEPTH;
+ dp83867->io_impedance = -EINVAL;
return 0;
}
@@ -269,6 +287,19 @@ static int dp83867_config(struct phy_device *phydev)
phy_write_mmd_indirect(phydev, DP83867_RGMIIDCTL,
DP83867_DEVADDR, phydev->addr, delay);
+
+ if (dp83867->io_impedance >= 0) {
+ val = phy_read_mmd_indirect(phydev,
+ DP83867_IO_MUX_CFG,
+ DP83867_DEVADDR,
+ phydev->addr);
+ val &= ~DP83867_IO_MUX_CFG_IO_IMPEDANCE_CTRL;
+ val |= dp83867->io_impedance &
+ DP83867_IO_MUX_CFG_IO_IMPEDANCE_CTRL;
+ phy_write_mmd_indirect(phydev, DP83867_IO_MUX_CFG,
+ DP83867_DEVADDR, phydev->addr,
+ val);
+ }
}
genphy_config_aneg(phydev);
--
2.10.1.dirty
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