netdev - [RFC V2 resend net-next 2/3] net: stmmac: add platform level clocks management

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Message-Id: <20210301102529.18573-3-qiangqing.zhang@nxp.com>
Date:   Mon,  1 Mar 2021 18:25:28 +0800
From:   Joakim Zhang <qiangqing.zhang@....com>
To:     peppe.cavallaro@...com, alexandre.torgue@...com,
        joabreu@...opsys.com, davem@...emloft.net, kuba@...nel.org,
        f.fainelli@...il.com, andrew@...n.ch
Cc:     linux-imx@....com, netdev@...r.kernel.org
Subject: [RFC V2 resend net-next 2/3] net: stmmac: add platform level clocks management

This patch intends to add platform level clocks management. Some
platforms may have their own special clocks, they also need to be
managed dynamically. If you want to manage such clocks, please implement
clks_config callback.

Signed-off-by: Joakim Zhang <qiangqing.zhang@....com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 10 ++++++++++
 include/linux/stmmac.h                            |  1 +
 2 files changed, 11 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index b4bc1c2104df..33b0783de270 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -127,9 +127,19 @@ int stmmac_bus_clks_config(struct stmmac_priv *priv, bool enabled)
 			clk_disable_unprepare(priv->plat->stmmac_clk);
 			return ret;
 		}
+		if (priv->plat->clks_config) {
+			ret = priv->plat->clks_config(priv->plat->bsp_priv, enabled);
+			if (ret) {
+				clk_disable_unprepare(priv->plat->stmmac_clk);
+				clk_disable_unprepare(priv->plat->pclk);
+				return ret;
+			}
+		}
 	} else {
 		clk_disable_unprepare(priv->plat->stmmac_clk);
 		clk_disable_unprepare(priv->plat->pclk);
+		if (priv->plat->clks_config)
+			priv->plat->clks_config(priv->plat->bsp_priv, enabled);
 	}
 
 	return ret;
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index a302982de2d7..5ab2a8138149 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -183,6 +183,7 @@ struct plat_stmmacenet_data {
 	int (*init)(struct platform_device *pdev, void *priv);
 	void (*exit)(struct platform_device *pdev, void *priv);
 	struct mac_device_info *(*setup)(void *priv);
+	int (*clks_config)(void *priv, bool enabled);
 	void *bsp_priv;
 	struct clk *stmmac_clk;
 	struct clk *pclk;
-- 
2.17.1