linux-kernel - [PATCH 1/5] net: stmmac: dwmac-mediatek: add platform level clocks management

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Message-ID: <20211110083948.6082-2-biao.huang@mediatek.com>
Date:   Wed, 10 Nov 2021 16:39:44 +0800
From:   Biao Huang <biao.huang@...iatek.com>
To:     <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>
CC:     Matthias Brugger <matthias.bgg@...il.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Biao Huang <biao.huang@...iatek.com>, <netdev@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <srv_heupstream@...iatek.com>, <macpaul.lin@...iatek.com>
Subject: [PATCH 1/5] net: stmmac: dwmac-mediatek: add platform level clocks management

This patch implements clks_config callback for dwmac-mediatek platform,
which could support platform level clocks management.

Signed-off-by: Biao Huang <biao.huang@...iatek.com>
---
 .../ethernet/stmicro/stmmac/dwmac-mediatek.c  | 24 ++++++++++++++-----
 1 file changed, 18 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
index 58c0feaa8131..157ff655c85e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
@@ -359,9 +359,6 @@ static int mediatek_dwmac_init(struct platform_device *pdev, void *priv)
 		return ret;
 	}
 
-	pm_runtime_enable(&pdev->dev);
-	pm_runtime_get_sync(&pdev->dev);
-
 	return 0;
 }
 
@@ -370,11 +367,25 @@ static void mediatek_dwmac_exit(struct platform_device *pdev, void *priv)
 	struct mediatek_dwmac_plat_data *plat = priv;
 
 	clk_bulk_disable_unprepare(plat->num_clks_to_config, plat->clks);
-
-	pm_runtime_put_sync(&pdev->dev);
-	pm_runtime_disable(&pdev->dev);
 }
 
+static int mediatek_dwmac_clks_config(void *priv, bool enabled)
+{
+	struct mediatek_dwmac_plat_data *plat = priv;
+	int ret = 0;
+
+	if (enabled) {
+		ret = clk_bulk_prepare_enable(plat->num_clks_to_config, plat->clks);
+		if (ret) {
+			dev_err(plat->dev, "failed to enable clks, err = %d\n", ret);
+			return ret;
+		}
+	} else {
+		clk_bulk_disable_unprepare(plat->num_clks_to_config, plat->clks);
+	}
+
+	return ret;
+}
 static int mediatek_dwmac_probe(struct platform_device *pdev)
 {
 	struct mediatek_dwmac_plat_data *priv_plat;
@@ -420,6 +431,7 @@ static int mediatek_dwmac_probe(struct platform_device *pdev)
 	plat_dat->bsp_priv = priv_plat;
 	plat_dat->init = mediatek_dwmac_init;
 	plat_dat->exit = mediatek_dwmac_exit;
+	plat_dat->clks_config = mediatek_dwmac_clks_config;
 	mediatek_dwmac_init(pdev, priv_plat);
 
 	ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
-- 
2.25.1