netdev - Re: [PATCH RFC net-next 3/7] net: stmmac: dwc-qos-eth: use generic stmmac_set_clk_tx

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Message-ID: <Z78G5tqpMrsm8iUD@shell.armlinux.org.uk>
Date: Wed, 26 Feb 2025 12:19:50 +0000
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Thierry Reding <thierry.reding@...il.com>
Cc: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Emil Renner Berthing <kernel@...il.dk>,
	Eric Dumazet <edumazet@...gle.com>,
	Fabio Estevam <festevam@...il.com>, imx@...ts.linux.dev,
	Inochi Amaoto <inochiama@...il.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Jan Petrous <jan.petrous@....nxp.com>,
	Jon Hunter <jonathanh@...dia.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-stm32@...md-mailman.stormreply.com,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Minda Chen <minda.chen@...rfivetech.com>, netdev@...r.kernel.org,
	NXP S32 Linux Team <s32@....com>, Paolo Abeni <pabeni@...hat.com>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Shawn Guo <shawnguo@...nel.org>,
	Thierry Reding <treding@...dia.com>
Subject: Re: [PATCH RFC net-next 3/7] net: stmmac: dwc-qos-eth: use generic
 stmmac_set_clk_tx_rate()

On Tue, Feb 25, 2025 at 09:35:52PM +0100, Thierry Reding wrote:
> On Tue, Feb 18, 2025 at 11:14:49AM +0000, Russell King (Oracle) wrote:
> > Use the generic stmmac_set_clk_tx_rate() to configure the MAC transmit
> > clock.
> > 
> > Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
> > ---
> >  .../net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c    | 10 ++--------
> >  1 file changed, 2 insertions(+), 8 deletions(-)
> 
> Reviewed-by: Thierry Reding <treding@...dia.com>

Hi Thierry,

Please note that things changed in this patch as a result of:

cff608268baf net: stmmac: dwc-qos: name struct plat_stmmacenet_data consistently

which has now been merged. Are you still happy for me to add your
r-b? The current patch is below.

8<===
From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Subject: [PATCH net-next] net: stmmac: dwc-qos: use generic
 stmmac_set_clk_tx_rate()

Use the generic stmmac_set_clk_tx_rate() to configure the MAC transmit
clock.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 .../net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c    | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
index 6cadf24a575c..3f0f4ea6cf2e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
@@ -30,7 +30,6 @@ struct tegra_eqos {
 
 	struct reset_control *rst;
 	struct clk *clk_slave;
-	struct clk *clk_tx;
 
 	struct gpio_desc *reset;
 };
@@ -150,7 +149,6 @@ static void tegra_eqos_fix_speed(void *priv, int speed, unsigned int mode)
 {
 	struct tegra_eqos *eqos = priv;
 	bool needs_calibration = false;
-	long rate = 125000000;
 	u32 value;
 	int err;
 
@@ -161,7 +159,6 @@ static void tegra_eqos_fix_speed(void *priv, int speed, unsigned int mode)
 		fallthrough;
 
 	case SPEED_10:
-		rate = rgmii_clock(speed);
 		break;
 
 	default:
@@ -208,10 +205,6 @@ static void tegra_eqos_fix_speed(void *priv, int speed, unsigned int mode)
 		value &= ~AUTO_CAL_CONFIG_ENABLE;
 		writel(value, eqos->regs + AUTO_CAL_CONFIG);
 	}
-
-	err = clk_set_rate(eqos->clk_tx, rate);
-	if (err < 0)
-		dev_err(eqos->dev, "failed to set TX rate: %d\n", err);
 }
 
 static int tegra_eqos_init(struct platform_device *pdev, void *priv)
@@ -247,7 +240,7 @@ static int tegra_eqos_probe(struct platform_device *pdev,
 	if (!is_of_node(dev->fwnode))
 		goto bypass_clk_reset_gpio;
 
-	eqos->clk_tx = dwc_eth_find_clk(plat_dat, "tx");
+	plat_dat->clk_tx_i = dwc_eth_find_clk(plat_dat, "tx");
 
 	eqos->reset = devm_gpiod_get(&pdev->dev, "phy-reset", GPIOD_OUT_HIGH);
 	if (IS_ERR(eqos->reset)) {
@@ -281,6 +274,7 @@ static int tegra_eqos_probe(struct platform_device *pdev,
 
 bypass_clk_reset_gpio:
 	plat_dat->fix_mac_speed = tegra_eqos_fix_speed;
+	plat_dat->set_clk_tx_rate = stmmac_set_clk_tx_rate;
 	plat_dat->init = tegra_eqos_init;
 	plat_dat->bsp_priv = eqos;
 	plat_dat->flags |= STMMAC_FLAG_SPH_DISABLE;
-- 
2.30.2


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