linux-kernel - [PATCH net-next v7 4/7] net: stmmac: introduce pcs_init/pcs

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Date: Mon, 13 May 2024 10:21:21 +0000
From: Hariprasad Kelam <hkelam@...vell.com>
To: Romain Gantois <romain.gantois@...tlin.com>,
        "David S. Miller"
	<davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski
	<kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Geert Uytterhoeven
	<geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Alexandre
 Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Russell King
	<linux@...linux.org.uk>,
        Clément Léger
	<clement.leger@...tlin.com>,
        Serge Semin <fancer.lancer@...il.com>
CC: Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>,
        "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>,
        "linux-renesas-soc@...r.kernel.org"
	<linux-renesas-soc@...r.kernel.org>,
        "linux-stm32@...md-mailman.stormreply.com"
	<linux-stm32@...md-mailman.stormreply.com>,
        "linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>,
        "Russell King (Oracle)"
	<rmk+kernel@...linux.org.uk>,
        Maxime Chevallier
	<maxime.chevallier@...tlin.com>
Subject: [PATCH net-next v7 4/7] net: stmmac: introduce pcs_init/pcs_exit
 stmmac operations



> From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
> 
> Introduce a mechanism whereby platforms can create their PCS instances
> prior to the network device being published to userspace, but after some of
> the core stmmac initialisation has been completed. This means that the data
> structures that platforms need will be available.
> 
> Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
> Reviewed-by: Maxime Chevallier <maxime.chevallier@...tlin.com>
> Reviewed-by: Serge Semin <fancer.lancer@...il.com>
> Co-developed-by: Romain Gantois <romain.gantois@...tlin.com>
> Signed-off-by: Romain Gantois <romain.gantois@...tlin.com>
> ---
>  drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c | 8 +++++++-
>  include/linux/stmmac.h                            | 2 ++
>  2 files changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
> b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
> index 54708440e27b8..aa43117134d38 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
> @@ -505,7 +505,10 @@ int stmmac_pcs_setup(struct net_device *ndev)
>  	priv = netdev_priv(ndev);
>  	mode = priv->plat->phy_interface;
> 
> -	if (priv->plat->mdio_bus_data && priv->plat->mdio_bus_data-
> >has_xpcs) {
> +	if (priv->plat->pcs_init) {
> +		ret = priv->plat->pcs_init(priv);
> +	} else if (priv->plat->mdio_bus_data &&
> +		   priv->plat->mdio_bus_data->has_xpcs) {
>  		/* Try to probe the XPCS by scanning all addresses */
>  		for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
>  			xpcs = xpcs_create_mdiodev(priv->mii, addr, mode);
> @@ -533,6 +536,9 @@ void stmmac_pcs_clean(struct net_device *ndev)  {
>  	struct stmmac_priv *priv = netdev_priv(ndev);
> 
> +	if (priv->plat->pcs_exit)
> +		priv->plat->pcs_exit(priv);
> +
>  	if (!priv->hw->xpcs)
>  		return;
> 
> diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h index
> dfa1828cd756a..4a24a246c617d 100644
> --- a/include/linux/stmmac.h
> +++ b/include/linux/stmmac.h
> @@ -285,6 +285,8 @@ struct plat_stmmacenet_data {
>  	int (*crosststamp)(ktime_t *device, struct system_counterval_t
> *system,
>  			   void *ctx);
>  	void (*dump_debug_regs)(void *priv);
> +	int (*pcs_init)(struct stmmac_priv *priv);
> +	void (*pcs_exit)(struct stmmac_priv *priv);
>  	void *bsp_priv;
>  	struct clk *stmmac_clk;
>  	struct clk *pclk;
> 
> --
> 2.44.0
> 
Reviewed-by: Hariprasad Kelam <hkelam@...vell.com>