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SubjectRe: [net-next PATCH RESEND 2/2] net: macb: add polarfire soc reset support
Date
On 01.07.2022 09:58, Conor Dooley wrote:
> To date, the Microchip PolarFire SoC (MPFS) has been using the
> cdns,macb compatible, however the generic device does not have reset
> support. Add a new compatible & .data for MPFS to hook into the reset
> functionality added for zynqmp support (and make the zynqmp init
> function generic in the process).
>
> Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
> ---
> drivers/net/ethernet/cadence/macb_main.c | 25 +++++++++++++++++-------
> 1 file changed, 18 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
> index d89098f4ede8..325f0463fd42 100644
> --- a/drivers/net/ethernet/cadence/macb_main.c
> +++ b/drivers/net/ethernet/cadence/macb_main.c
> @@ -4689,33 +4689,32 @@ static const struct macb_config np4_config = {
> .usrio = &macb_default_usrio,
> };
>
> -static int zynqmp_init(struct platform_device *pdev)
> +static int init_reset_optional(struct platform_device *pdev)

It doesn't sound like a good name for this function but I don't have
something better to propose.

> {
> struct net_device *dev = platform_get_drvdata(pdev);
> struct macb *bp = netdev_priv(dev);
> int ret;
>
> if (bp->phy_interface == PHY_INTERFACE_MODE_SGMII) {
> - /* Ensure PS-GTR PHY device used in SGMII mode is ready */
> + /* Ensure PHY device used in SGMII mode is ready */
> bp->sgmii_phy = devm_phy_optional_get(&pdev->dev, NULL);
>
> if (IS_ERR(bp->sgmii_phy)) {
> ret = PTR_ERR(bp->sgmii_phy);
> dev_err_probe(&pdev->dev, ret,
> - "failed to get PS-GTR PHY\n");
> + "failed to get SGMII PHY\n");
> return ret;
> }
>
> ret = phy_init(bp->sgmii_phy);
> if (ret) {
> - dev_err(&pdev->dev, "failed to init PS-GTR PHY: %d\n",
> + dev_err(&pdev->dev, "failed to init SGMII PHY: %d\n",
> ret);
> return ret;
> }
> }
>
> - /* Fully reset GEM controller at hardware level using zynqmp-reset driver,
> - * if mapped in device tree.
> + /* Fully reset controller at hardware level if mapped in device tree
> */

The new comment can fit on a single line.

> ret = device_reset_optional(&pdev->dev);
> if (ret) {
> @@ -4737,7 +4736,7 @@ static const struct macb_config zynqmp_config = {
> MACB_CAPS_GEM_HAS_PTP | MACB_CAPS_BD_RD_PREFETCH,
> .dma_burst_length = 16,
> .clk_init = macb_clk_init,
> - .init = zynqmp_init,
> + .init = init_reset_optional,
> .jumbo_max_len = 10240,
> .usrio = &macb_default_usrio,
> };
> @@ -4751,6 +4750,17 @@ static const struct macb_config zynq_config = {
> .usrio = &macb_default_usrio,
> };
>
> +static const struct macb_config mpfs_config = {
> + .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE |
> + MACB_CAPS_JUMBO |
> + MACB_CAPS_GEM_HAS_PTP,

Except for zynqmp and default_gem_config the rest of the capabilities for
other SoCs are aligned something like this:

+ .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE |
+ MACB_CAPS_JUMBO |
+ MACB_CAPS_GEM_HAS_PTP,

To me it looks better to have you caps aligned this way.

Thank you,
Claudiu Beznea

> + .dma_burst_length = 16,
> + .clk_init = macb_clk_init,
> + .init = init_reset_optional,
> + .usrio = &macb_default_usrio,
> + .jumbo_max_len = 10240,
> +};
> +
> static const struct macb_config sama7g5_gem_config = {
> .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_CLK_HW_CHG |
> MACB_CAPS_MIIONRGMII,
> @@ -4787,6 +4797,7 @@ static const struct of_device_id macb_dt_ids[] = {
> { .compatible = "cdns,zynqmp-gem", .data = &zynqmp_config},
> { .compatible = "cdns,zynq-gem", .data = &zynq_config },
> { .compatible = "sifive,fu540-c000-gem", .data = &fu540_c000_config },
> + { .compatible = "microchip,mpfs-macb", .data = &mpfs_config },
> { .compatible = "microchip,sama7g5-gem", .data = &sama7g5_gem_config },
> { .compatible = "microchip,sama7g5-emac", .data = &sama7g5_emac_config },
> { /* sentinel */ }

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