net: stmmac: dwmac-meson8b: Make the clock enabling code re-usable

The timing adjustment clock will need similar logic as the RGMII clock:
It has to be enabled in the driver conditionally and when the driver is
unloaded it should be disabled again. Extract the existing code for the
RGMII clock into a new function so it can be re-used.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
index 41f3ef6..d31f79c 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
@@ -266,6 +266,22 @@ static int meson_axg_set_phy_mode(struct meson8b_dwmac *dwmac)
        return 0;
 }
 
+static int meson8b_devm_clk_prepare_enable(struct meson8b_dwmac *dwmac,
+                                          struct clk *clk)
+{
+       int ret;
+
+       ret = clk_prepare_enable(clk);
+       if (ret)
+               return ret;
+
+       devm_add_action_or_reset(dwmac->dev,
+                                (void(*)(void *))clk_disable_unprepare,
+                                dwmac->rgmii_tx_clk);
+
+       return 0;
+}
+
 static int meson8b_init_prg_eth(struct meson8b_dwmac *dwmac)
 {
        int ret;
@@ -299,16 +315,13 @@ static int meson8b_init_prg_eth(struct meson8b_dwmac *dwmac)
                        return ret;
                }
 
-               ret = clk_prepare_enable(dwmac->rgmii_tx_clk);
+               ret = meson8b_devm_clk_prepare_enable(dwmac,
+                                                     dwmac->rgmii_tx_clk);
                if (ret) {
                        dev_err(dwmac->dev,
                                "failed to enable the RGMII TX clock\n");
                        return ret;
                }
-
-               devm_add_action_or_reset(dwmac->dev,
-                                       (void(*)(void *))clk_disable_unprepare,
-                                       dwmac->rgmii_tx_clk);
                break;
 
        case PHY_INTERFACE_MODE_RMII: