From 64631700645a90d5734e221e27717cc2227125b0 Mon Sep 17 00:00:00 2001 From: Mugunthan V N Date: Tue, 24 Jan 2017 11:15:40 -0600 Subject: [PATCH] net: phy: dp83867: Add support for MAC impedance configuration Add support for programmable MAC impedance configuration and fix typo in DT impedance parameters names. Signed-off-by: Mugunthan V N Signed-off-by: Grygorii Strashko Tested-by: Lokesh Vutla Acked-by: Joe Hershberger --- 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 5a1bb34f6b..bc814f1b4c 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 = ; ti,tx-internal-delay = ; ti,fifo-depth = ; - ti,min-output-imepdance; + ti,min-output-impedance; }; dp83867_1: ethernet-phy@3 { @@ -75,6 +75,6 @@ ti,rx-internal-delay = ; ti,tx-internal-delay = ; ti,fifo-depth = ; - ti,min-output-imepdance; + ti,min-output-impedance; }; }; diff --git a/drivers/net/phy/ti.c b/drivers/net/phy/ti.c index 5e2b2dd9dd..2fd566cfa6 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; } @@ -268,6 +286,19 @@ 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); -- 2.30.2