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

[Joakim Zhang]

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.zh...@nxp.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 291f530abada..fb427366a1a7 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