linux-kernel - [PATCH v2 3/8] net: macb: add function to disable all macb clocks

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Message-ID: <1607343333-26552-4-git-send-email-claudiu.beznea@microchip.com>
Date:   Mon, 7 Dec 2020 14:15:28 +0200
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <davem@...emloft.net>, <kuba@...nel.org>, <robh+dt@...nel.org>,
        <nicolas.ferre@...rochip.com>, <linux@...linux.org.uk>,
        <paul.walmsley@...ive.com>, <palmer@...belt.com>
CC:     <yash.shah@...ive.com>, <netdev@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-riscv@...ts.infradead.org>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>
Subject: [PATCH v2 3/8] net: macb: add function to disable all macb clocks

Add function to disable all macb clocks.

Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
Suggested-by: Andrew Lunn <andrew@...n.ch>
---
 drivers/net/ethernet/cadence/macb_main.c | 62 ++++++++++++++++----------------
 1 file changed, 32 insertions(+), 30 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index b23e986ac6dc..6b8e1109dfd3 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -3694,6 +3694,16 @@ static void macb_probe_queues(void __iomem *mem,
 	*num_queues = hweight32(*queue_mask);
 }
 
+static void macb_clks_disable(struct clk *pclk, struct clk *hclk, struct clk *tx_clk,
+			      struct clk *rx_clk, struct clk *tsu_clk)
+{
+	clk_disable_unprepare(tx_clk);
+	clk_disable_unprepare(hclk);
+	clk_disable_unprepare(pclk);
+	clk_disable_unprepare(rx_clk);
+	clk_disable_unprepare(tsu_clk);
+}
+
 static int macb_clk_init(struct platform_device *pdev, struct clk **pclk,
 			 struct clk **hclk, struct clk **tx_clk,
 			 struct clk **rx_clk, struct clk **tsu_clk)
@@ -3743,40 +3753,37 @@ static int macb_clk_init(struct platform_device *pdev, struct clk **pclk,
 	err = clk_prepare_enable(*hclk);
 	if (err) {
 		dev_err(&pdev->dev, "failed to enable hclk (%d)\n", err);
-		goto err_disable_pclk;
+		hclk = NULL;
+		tx_clk = NULL;
+		rx_clk = NULL;
+		goto err_disable_clks;
 	}
 
 	err = clk_prepare_enable(*tx_clk);
 	if (err) {
 		dev_err(&pdev->dev, "failed to enable tx_clk (%d)\n", err);
-		goto err_disable_hclk;
+		tx_clk = NULL;
+		rx_clk = NULL;
+		goto err_disable_clks;
 	}
 
 	err = clk_prepare_enable(*rx_clk);
 	if (err) {
 		dev_err(&pdev->dev, "failed to enable rx_clk (%d)\n", err);
-		goto err_disable_txclk;
+		rx_clk = NULL;
+		goto err_disable_clks;
 	}
 
 	err = clk_prepare_enable(*tsu_clk);
 	if (err) {
 		dev_err(&pdev->dev, "failed to enable tsu_clk (%d)\n", err);
-		goto err_disable_rxclk;
+		goto err_disable_clks;
 	}
 
 	return 0;
 
-err_disable_rxclk:
-	clk_disable_unprepare(*rx_clk);
-
-err_disable_txclk:
-	clk_disable_unprepare(*tx_clk);
-
-err_disable_hclk:
-	clk_disable_unprepare(*hclk);
-
-err_disable_pclk:
-	clk_disable_unprepare(*pclk);
+err_disable_clks:
+	macb_clks_disable(*pclk, *hclk, *tx_clk, *rx_clk, NULL);
 
 	return err;
 }
@@ -4755,11 +4762,7 @@ static int macb_probe(struct platform_device *pdev)
 	free_netdev(dev);
 
 err_disable_clocks:
-	clk_disable_unprepare(tx_clk);
-	clk_disable_unprepare(hclk);
-	clk_disable_unprepare(pclk);
-	clk_disable_unprepare(rx_clk);
-	clk_disable_unprepare(tsu_clk);
+	macb_clks_disable(bp->pclk, bp->hclk, bp->tx_clk, bp->rx_clk, bp->tsu_clk);
 	pm_runtime_disable(&pdev->dev);
 	pm_runtime_set_suspended(&pdev->dev);
 	pm_runtime_dont_use_autosuspend(&pdev->dev);
@@ -4784,11 +4787,8 @@ static int macb_remove(struct platform_device *pdev)
 		pm_runtime_disable(&pdev->dev);
 		pm_runtime_dont_use_autosuspend(&pdev->dev);
 		if (!pm_runtime_suspended(&pdev->dev)) {
-			clk_disable_unprepare(bp->tx_clk);
-			clk_disable_unprepare(bp->hclk);
-			clk_disable_unprepare(bp->pclk);
-			clk_disable_unprepare(bp->rx_clk);
-			clk_disable_unprepare(bp->tsu_clk);
+			macb_clks_disable(bp->pclk, bp->hclk, bp->tx_clk,
+					  bp->rx_clk, bp->tsu_clk);
 			pm_runtime_set_suspended(&pdev->dev);
 		}
 		phylink_destroy(bp->phylink);
@@ -4966,14 +4966,16 @@ static int __maybe_unused macb_runtime_suspend(struct device *dev)
 {
 	struct net_device *netdev = dev_get_drvdata(dev);
 	struct macb *bp = netdev_priv(netdev);
+	struct clk *pclk = NULL, *hclk = NULL, *tx_clk = NULL, *rx_clk = NULL;
 
 	if (!(device_may_wakeup(dev))) {
-		clk_disable_unprepare(bp->tx_clk);
-		clk_disable_unprepare(bp->hclk);
-		clk_disable_unprepare(bp->pclk);
-		clk_disable_unprepare(bp->rx_clk);
+		pclk = bp->pclk;
+		hclk = bp->hclk;
+		tx_clk = bp->tx_clk;
+		rx_clk = bp->rx_clk;
 	}
-	clk_disable_unprepare(bp->tsu_clk);
+
+	macb_clks_disable(pclk, hclk, tx_clk, rx_clk, bp->tsu_clk);
 
 	return 0;
 }
-- 
2.7.4