Hi Neil,
On 31 October 2016 at 11:54, Neil Armstrong <narmstr...@baylibre.com> wrote:
> Add Synopsys Designware MAC Glue layer for the Oxford Semiconductor OX820.
>
> Acked-by: Joachim Eastwood <manab...@gmail.com>
> Signed-off-by: Neil Armstrong <narmstr...@baylibre.com>
> ---
> +static int oxnas_dwmac_init(struct oxnas_dwmac *dwmac)
> +{
> + unsigned int value;
> + int ret;
> +
> + /* Reset HW here before changing the glue configuration */
> + ret = device_reset(dwmac->dev);
> + if (ret)
> + return ret;
> +
> + ret = clk_prepare_enable(dwmac->clk);
> + if (ret)
> + return ret;
> +
> + ret = regmap_read(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, &value);
> + if (ret < 0)
> + return ret;
If regmap reading fails here, the clock will be left on as probe fails.
> +
> + /* Enable GMII_GTXCLK to follow GMII_REFCLK, required for gigabit PHY
> */
> + value |= BIT(DWMAC_CKEN_GTX) |
> + /* Use simple mux for 25/125 Mhz clock switching */
> + BIT(DWMAC_SIMPLE_MUX) |
> + /* set auto switch tx clock source */
> + BIT(DWMAC_AUTO_TX_SOURCE) |
> + /* enable tx & rx vardelay */
> + BIT(DWMAC_CKEN_TX_OUT) |
> + BIT(DWMAC_CKEN_TXN_OUT) |
> + BIT(DWMAC_CKEN_TX_IN) |
> + BIT(DWMAC_CKEN_RX_OUT) |
> + BIT(DWMAC_CKEN_RXN_OUT) |
> + BIT(DWMAC_CKEN_RX_IN);
> + regmap_write(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, value);
> +
> + /* set tx & rx vardelay */
> + value = DWMAC_TX_VARDELAY(4) |
> + DWMAC_TXN_VARDELAY(2) |
> + DWMAC_RX_VARDELAY(10) |
> + DWMAC_RXN_VARDELAY(8);
> + regmap_write(dwmac->regmap, OXNAS_DWMAC_DELAY_REGOFFSET, value);
> +
> + return 0;
> +}
regards,
Joachim Eastwood
