linux-kernel - [PATCH v2 21/24] net: stmmac: dwmac-imx: Discard Tx clock request

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Message-ID: <20210208135609.7685-22-Sergey.Semin@baikalelectronics.ru>
Date:   Mon, 8 Feb 2021 16:56:05 +0300
From:   Serge Semin <Sergey.Semin@...kalelectronics.ru>
To:     Rob Herring <robh+dt@...nel.org>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Jose Abreu <joabreu@...opsys.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Johan Hovold <johan@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        Joao Pinto <jpinto@...opsys.com>,
        Lars Persson <larper@...s.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>
CC:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Serge Semin <fancer.lancer@...il.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        Vyacheslav Mitrofanov 
        <Vyacheslav.Mitrofanov@...kalelectronics.ru>,
        <netdev@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 21/24] net: stmmac: dwmac-imx: Discard Tx clock request

Since the Tx clock is now requested and enabled/disabled in the STMMAC
DT-based platform config method, there is no need in duplicating the same
procedures in the DW MAC iMX sub-driver.

Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
---
 .../net/ethernet/stmicro/stmmac/dwmac-imx.c   | 21 +++++--------------
 1 file changed, 5 insertions(+), 16 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
index 223f69da7e95..8b2c7f1ba745 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
@@ -40,7 +40,6 @@ struct imx_dwmac_ops {
 
 struct imx_priv_data {
 	struct device *dev;
-	struct clk *clk_tx;
 	struct clk *clk_mem;
 	struct regmap *intf_regmap;
 	u32 intf_reg_off;
@@ -104,12 +103,6 @@ static int imx_dwmac_init(struct platform_device *pdev, void *priv)
 		return ret;
 	}
 
-	ret = clk_prepare_enable(dwmac->clk_tx);
-	if (ret) {
-		dev_err(&pdev->dev, "tx clock enable failed\n");
-		goto clk_tx_en_failed;
-	}
-
 	if (dwmac->ops->set_intf_mode) {
 		ret = dwmac->ops->set_intf_mode(plat_dat);
 		if (ret)
@@ -119,8 +112,6 @@ static int imx_dwmac_init(struct platform_device *pdev, void *priv)
 	return 0;
 
 intf_mode_failed:
-	clk_disable_unprepare(dwmac->clk_tx);
-clk_tx_en_failed:
 	clk_disable_unprepare(dwmac->clk_mem);
 	return ret;
 }
@@ -129,7 +120,6 @@ static void imx_dwmac_exit(struct platform_device *pdev, void *priv)
 {
 	struct imx_priv_data *dwmac = priv;
 
-	clk_disable_unprepare(dwmac->clk_tx);
 	clk_disable_unprepare(dwmac->clk_mem);
 }
 
@@ -162,7 +152,7 @@ static void imx_dwmac_fix_speed(void *priv, unsigned int speed)
 		return;
 	}
 
-	err = clk_set_rate(dwmac->clk_tx, rate);
+	err = clk_set_rate(plat_dat->tx_clk, rate);
 	if (err < 0)
 		dev_err(dwmac->dev, "failed to set tx rate %lu\n", rate);
 }
@@ -176,10 +166,9 @@ imx_dwmac_parse_dt(struct imx_priv_data *dwmac, struct device *dev)
 	if (of_get_property(np, "snps,rmii_refclk_ext", NULL))
 		dwmac->rmii_refclk_ext = true;
 
-	dwmac->clk_tx = devm_clk_get(dev, "tx");
-	if (IS_ERR(dwmac->clk_tx)) {
-		dev_err(dev, "failed to get tx clock\n");
-		return PTR_ERR(dwmac->clk_tx);
+	if (!dwmac->plat_dat->tx_clk) {
+		dev_err(dev, "no tx clock found\n");
+		return -EINVAL;
 	}
 
 	dwmac->clk_mem = NULL;
@@ -239,6 +228,7 @@ static int imx_dwmac_probe(struct platform_device *pdev)
 
 	dwmac->ops = data;
 	dwmac->dev = &pdev->dev;
+	dwmac->plat_dat = plat_dat;
 
 	ret = imx_dwmac_parse_dt(dwmac, &pdev->dev);
 	if (ret) {
@@ -251,7 +241,6 @@ static int imx_dwmac_probe(struct platform_device *pdev)
 	plat_dat->exit = imx_dwmac_exit;
 	plat_dat->fix_mac_speed = imx_dwmac_fix_speed;
 	plat_dat->bsp_priv = dwmac;
-	dwmac->plat_dat = plat_dat;
 
 	ret = imx_dwmac_init(pdev, dwmac);
 	if (ret)
-- 
2.29.2