netdev - Re: [PATCH net-next 5/6] net: stmmac: starfive: use dwmac_set_tx_clk

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Date: Thu, 14 Sep 2023 15:10:51 +0300
From: Serge Semin <fancer.lancer@...il.com>
To: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Cc: Alexandre Torgue <alexandre.torgue@...s.st.com>, 
	Jose Abreu <joabreu@...opsys.com>, Alexei Starovoitov <ast@...nel.org>, bpf@...r.kernel.org, 
	Daniel Borkmann <daniel@...earbox.net>, "David S. Miller" <davem@...emloft.net>, 
	Emil Renner Berthing <kernel@...il.dk>, Eric Dumazet <edumazet@...gle.com>, 
	Fabio Estevam <festevam@...il.com>, Jakub Kicinski <kuba@...nel.org>, 
	Jesper Dangaard Brouer <hawk@...nel.org>, John Fastabend <john.fastabend@...il.com>, 
	linux-arm-kernel@...ts.infradead.org, linux-stm32@...md-mailman.stormreply.com, 
	Maxime Coquelin <mcoquelin.stm32@...il.com>, netdev@...r.kernel.org, NXP Linux Team <linux-imx@....com>, 
	Paolo Abeni <pabeni@...hat.com>, Pengutronix Kernel Team <kernel@...gutronix.de>, 
	Samin Guo <samin.guo@...rfivetech.com>, Sascha Hauer <s.hauer@...gutronix.de>, 
	Shawn Guo <shawnguo@...nel.org>
Subject: Re: [PATCH net-next 5/6] net: stmmac: starfive: use
 dwmac_set_tx_clk_gmii()

On Mon, Sep 11, 2023 at 04:29:31PM +0100, Russell King (Oracle) wrote:
> Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
> ---
>  .../ethernet/stmicro/stmmac/dwmac-starfive.c  | 29 +++++--------------
>  1 file changed, 8 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
> index 9289bb87c3e3..3dc04017e3d3 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
> @@ -14,6 +14,7 @@
>  #include <linux/regmap.h>
>  
>  #include "stmmac_platform.h"
> +#include "stmmac_plat_lib.h"
>  
>  #define STARFIVE_DWMAC_PHY_INFT_RGMII	0x1
>  #define STARFIVE_DWMAC_PHY_INFT_RMII	0x4
> @@ -27,29 +28,15 @@ struct starfive_dwmac {
>  static void starfive_dwmac_fix_mac_speed(void *priv, unsigned int speed, unsigned int mode)
>  {
>  	struct starfive_dwmac *dwmac = priv;
> -	unsigned long rate;
>  	int err;
>  
> -	rate = clk_get_rate(dwmac->clk_tx);
> -
> -	switch (speed) {
> -	case SPEED_1000:
> -		rate = 125000000;
> -		break;
> -	case SPEED_100:
> -		rate = 25000000;
> -		break;
> -	case SPEED_10:
> -		rate = 2500000;
> -		break;
> -	default:
> -		dev_err(dwmac->dev, "invalid speed %u\n", speed);
> -		break;
> -	}
> -
> -	err = clk_set_rate(dwmac->clk_tx, rate);
> -	if (err)
> -		dev_err(dwmac->dev, "failed to set tx rate %lu\n", rate);
> +	err = dwmac_set_tx_clk_gmii(dwmac->clk_tx, speed);
> +	if (err == -ENOTSUPP)

> +		dev_err(dwmac->dev, "invalid speed %dMbps\n", speed);

%u?

> +	else if (err)
> +		dev_err(dwmac->dev,

> +			"failed to set tx rate for speed %dMbps: %pe\n",

ditto

-Serge(y)

> +			speed, ERR_PTR(err));
>  }
>  
>  static int starfive_dwmac_set_mode(struct plat_stmmacenet_data *plat_dat)
> -- 
> 2.30.2
> 
>