[PATCH 1/1] net: stmmac: add support for platform specific reset

[Shenwei Wang]

> -----Original Message-----
> From: Shenwei Wang <shenwei.wang at nxp.com>
> Sent: Tuesday, March 21, 2023 2:09 PM
> To: David S. Miller <davem at davemloft.net>; Eric Dumazet
> <edumazet at google.com>; Jakub Kicinski <kuba at kernel.org>; Paolo Abeni
> <pabeni at redhat.com>; Maxime Coquelin <mcoquelin.stm32 at gmail.com>;
> Shawn Guo <shawnguo at kernel.org>; dl-linux-imx <linux-imx at nxp.com>
> Cc: Giuseppe Cavallaro <peppe.cavallaro at st.com>; Alexandre Torgue
> <alexandre.torgue at foss.st.com>; Jose Abreu <joabreu at synopsys.com>; Sascha
> Hauer <s.hauer at pengutronix.de>; Pengutronix Kernel Team
> <kernel at pengutronix.de>; Fabio Estevam <festevam at gmail.com>; Wong Vee
> Khee <veekhee at apple.com>; Jon Hunter <jonathanh at nvidia.com>;
> Mohammad Athari Bin Ismail <mohammad.athari.ismail at intel.com>; Andrey
> Konovalov <andrey.konovalov at linaro.org>; Revanth Kumar Uppala
> <ruppala at nvidia.com>; Tan Tee Min <tee.min.tan at linux.intel.com>; Shenwei
> Wang <shenwei.wang at nxp.com>; netdev at vger.kernel.org; linux-stm32 at st-
> md-mailman.stormreply.com; linux-arm-kernel at lists.infradead.org;
> imx at lists.linux.dev
> Subject: [PATCH 1/1] net: stmmac: add support for platform specific reset
> 
> This patch adds support for platform-specific reset logic in the stmmac driver.
> Some SoCs require a different reset mechanism than the standard dwmac IP
> reset. To support these platforms, a new function pointer 'fix_soc_reset' is
> added to the plat_stmmacenet_data structure.
> The stmmac_reset macro in hwif.h is modified to call the 'fix_soc_reset'
> function if it exists. This enables the driver to use the platform-specific reset
> logic when necessary.
> 

A soft ping. 😊

Thanks,
Shenwei

> Signed-off-by: Shenwei Wang <shenwei.wang at nxp.com>
> ---
>  drivers/net/ethernet/stmicro/stmmac/hwif.h | 10 +++++++++-
>  include/linux/stmmac.h                     |  1 +
>  2 files changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h
> b/drivers/net/ethernet/stmicro/stmmac/hwif.h
> index 16a7421715cb..e24ce870690e 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/hwif.h
> +++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h
> @@ -215,7 +215,15 @@ struct stmmac_dma_ops {  };
> 
>  #define stmmac_reset(__priv, __args...) \
> -	stmmac_do_callback(__priv, dma, reset, __args)
> +({ \
> +	int __result = -EINVAL; \
> +	if ((__priv) && (__priv)->plat && (__priv)->plat->fix_soc_reset) { \
> +		__result = (__priv)->plat->fix_soc_reset((__priv)->plat,
> ##__args); \
> +	} else { \
> +		__result = stmmac_do_callback(__priv, dma, reset, __args); \
> +	} \
> +	__result; \
> +})
>  #define stmmac_dma_init(__priv, __args...) \
>  	stmmac_do_void_callback(__priv, dma, init, __args)  #define
> stmmac_init_chan(__priv, __args...) \ diff --git a/include/linux/stmmac.h
> b/include/linux/stmmac.h index a152678b82b7..9044477fad61 100644
> --- a/include/linux/stmmac.h
> +++ b/include/linux/stmmac.h
> @@ -223,6 +223,7 @@ struct plat_stmmacenet_data {
>  	struct stmmac_rxq_cfg rx_queues_cfg[MTL_MAX_RX_QUEUES];
>  	struct stmmac_txq_cfg tx_queues_cfg[MTL_MAX_TX_QUEUES];
>  	void (*fix_mac_speed)(void *priv, unsigned int speed);
> +	int (*fix_soc_reset)(void *priv, void __iomem *ioaddr);
>  	int (*serdes_powerup)(struct net_device *ndev, void *priv);
>  	void (*serdes_powerdown)(struct net_device *ndev, void *priv);
>  	void (*speed_mode_2500)(struct net_device *ndev, void *priv);
> --
> 2.34.1