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.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 3c50846f59cd633035c299dfc692e5f40cf07102..a10704d8e3c670a8c3e4ea0a02131a53e262180c 100644 (file)
--- 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 722dc167b5c92c5e12fb45a117ba51bde43e9296..51004ebd05401f0b7c447e0f24744baa87433de0 100644 (file)
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -184,6 +184,7 @@ 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;