On Tuesday 04 October 2016 06:26 PM, Mugunthan V N wrote:
> Add support for programmable MAC impedance configuration
>
> Signed-off-by: Mugunthan V N <mugunthanvnm@xxxxxx>
> ---
> drivers/net/phy/dp83867.c | 28 ++++++++++++++++++++++++++++
> 1 file changed, 28 insertions(+)
>
> diff --git a/drivers/net/phy/dp83867.c b/drivers/net/phy/dp83867.c
> index 91177a4..795ae17 100644
> --- a/drivers/net/phy/dp83867.c
> +++ b/drivers/net/phy/dp83867.c
> @@ -33,6 +33,7 @@
> /* 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)
> @@ -62,10 +63,17 @@
> /* RGMIIDCTL bits */
> #define DP83867_RGMII_TX_CLK_DELAY_SHIFT 4
>
> +/* 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;
> };
>
> static int dp83867_ack_interrupt(struct phy_device *phydev)
> @@ -111,6 +119,14 @@ static int dp83867_of_init(struct phy_device *phydev)
> if (!of_node)
> return -ENODEV;
>
> + dp83867->io_impedance = -EINVAL;
> +
> + /* Optional configuration */
> + if (of_property_read_bool(of_node, "ti,max-output-imepdance"))
s/imepdance/impedance
> + dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MAX;
> + else if (of_property_read_bool(of_node, "ti,min-output-imepdance"))
s/imepdance/impedance
Thanks and regards,
Lokesh
> + dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MIN;
> +
> ret = of_property_read_u32(of_node, "ti,rx-internal-delay",
> &dp83867->rx_id_delay);
> if (ret)
> @@ -184,6 +200,18 @@ static int dp83867_config_init(struct phy_device *phydev)
>
> phy_write_mmd_indirect(phydev, DP83867_RGMIIDCTL,
> DP83867_DEVADDR, delay);
> +
> + if (dp83867->io_impedance >= 0) {
> + val = phy_read_mmd_indirect(phydev, DP83867_IO_MUX_CFG,
> + DP83867_DEVADDR);
> +
> + 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, val);
> + }
> }
>
> return 0;
>
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