[RESEND PATCH v2 02/11] net: dwc_eth_qos: Add option "snps,reset-gpio" phy-rst gpio for stm32

[Patrice CHOTARD]

Hi David

On 5/12/20 11:56 AM, David Wu wrote:
> It can be seen that most of the Socs using STM mac, "snps,reset-gpio"
> gpio is used, adding this option makes reset function more general.
>
> Signed-off-by: David Wu <david.wu at rock-chips.com>
> ---
>
> Changes in v2:
> - Remove the code is not related (Patrice)
>
>  drivers/net/dwc_eth_qos.c | 32 +++++++++++++++++++++++++++++++-
>  1 file changed, 31 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/dwc_eth_qos.c b/drivers/net/dwc_eth_qos.c
> index 66a02aa80b..92dab678c7 100644
> --- a/drivers/net/dwc_eth_qos.c
> +++ b/drivers/net/dwc_eth_qos.c
> @@ -314,6 +314,7 @@ struct eqos_priv {
>  	struct eqos_tegra186_regs *tegra186_regs;
>  	struct reset_ctl reset_ctl;
>  	struct gpio_desc phy_reset_gpio;
> +	u32 reset_delays[3];
>  	struct clk clk_master_bus;
>  	struct clk clk_rx;
>  	struct clk clk_ptp_ref;
> @@ -739,6 +740,15 @@ static int eqos_start_resets_stm32(struct udevice *dev)
>  
>  	debug("%s(dev=%p):\n", __func__, dev);
>  	if (dm_gpio_is_valid(&eqos->phy_reset_gpio)) {
> +		ret = dm_gpio_set_value(&eqos->phy_reset_gpio, 0);
> +		if (ret < 0) {
> +			pr_err("dm_gpio_set_value(phy_reset, deassert) failed: %d",
> +			       ret);
> +			return ret;
> +		}
> +
> +		udelay(eqos->reset_delays[0]);
> +
>  		ret = dm_gpio_set_value(&eqos->phy_reset_gpio, 1);
>  		if (ret < 0) {
>  			pr_err("dm_gpio_set_value(phy_reset, assert) failed: %d",
> @@ -746,7 +756,7 @@ static int eqos_start_resets_stm32(struct udevice *dev)
>  			return ret;
>  		}
>  
> -		udelay(2);
> +		udelay(eqos->reset_delays[1]);
>  
>  		ret = dm_gpio_set_value(&eqos->phy_reset_gpio, 0);
>  		if (ret < 0) {
> @@ -754,6 +764,8 @@ static int eqos_start_resets_stm32(struct udevice *dev)
>  			       ret);
>  			return ret;
>  		}
> +
> +		udelay(eqos->reset_delays[2]);
>  	}
>  	debug("%s: OK\n", __func__);
>  
> @@ -1864,11 +1876,29 @@ static int eqos_probe_resources_stm32(struct udevice *dev)
>  		if (ret)
>  			pr_warn("gpio_request_by_name(phy reset) not provided %d",
>  				ret);
> +		else
> +			eqos->reset_delays[1] = 2;
>  
>  		eqos->phyaddr = ofnode_read_u32_default(phandle_args.node,
>  							"reg", -1);
>  	}
>  
> +	if (!dm_gpio_is_valid(&eqos->phy_reset_gpio)) {
> +		int reset_flags = GPIOD_IS_OUT;
> +
> +		if (dev_read_bool(dev, "snps,reset-active-low"))
> +			reset_flags |= GPIOD_ACTIVE_LOW;
> +
> +		ret = gpio_request_by_name(dev, "snps,reset-gpio", 0,
> +					   &eqos->phy_reset_gpio, reset_flags);
> +		if (ret == 0)
> +			ret = dev_read_u32_array(dev, "snps,reset-delays-us",
> +						 eqos->reset_delays, 3);
> +		else
> +			pr_warn("gpio_request_by_name(snps,reset-gpio) failed: %d",
> +				ret);
> +	}
> +
>  	debug("%s: OK\n", __func__);
>  	return 0;
>  

Reviewed-by: Patrice Chotard <patrice.chotard at st.com>

Thanks