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Message-ID: <jdqitzxy7lymkn2mizkvvycttxb4prxhevoqhwsatikceja5ph@sor2bnlaopre>
Date: Fri, 3 May 2024 01:35:25 +0300
From: Serge Semin <fancer.lancer@...il.com>
To: Romain Gantois <romain.gantois@...tlin.com>
Cc: "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>, Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
netdev@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-renesas-soc@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
linux-arm-kernel@...ts.infradead.org, "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
Maxime Chevallier <maxime.chevallier@...tlin.com>
Subject: Re: [PATCH net-next v5 4/7] net: stmmac: introduce pcs_init/pcs_exit
stmmac operations
On Tue, Apr 30, 2024 at 09:29:44AM +0200, Romain Gantois wrote:
> 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>
> Co-developed-by: Romain Gantois <romain.gantois@...tlin.com>
> Signed-off-by: Romain Gantois <romain.gantois@...tlin.com>
Reviewed-by: Serge Semin <fancer.lancer@...il.com>
-Serge(y)
> ---
> 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 af8ad9768da10..1c788caea0cfb 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);
> @@ -531,6 +534,9 @@ int stmmac_pcs_setup(struct net_device *ndev)
>
> void stmmac_pcs_clean(struct stmmac_priv *priv)
> {
> + 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
>
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