[RFC V2 resend net-next 3/3] net: stmmac: dwmac-imx: add platform level clocks management for i.MX

[Joakim Zhang]

Split clocks settings from init callback into clks_config callback,
which could support platform level clocks management.

Signed-off-by: Joakim Zhang <qiangqing.zh...@nxp.com>
---
 .../net/ethernet/stmicro/stmmac/dwmac-imx.c   | 60 +++++++++++--------
 1 file changed, 36 insertions(+), 24 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c 
b/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
index 223f69da7e95..c1a361305a5a 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
@@ -90,6 +90,32 @@ imx8dxl_set_intf_mode(struct plat_stmmacenet_data *plat_dat)
        return ret;
 }
 
+static int imx_dwmac_clks_config(void *priv, bool enabled)
+{
+       struct imx_priv_data *dwmac = priv;
+       int ret = 0;
+
+       if (enabled) {
+               ret = clk_prepare_enable(dwmac->clk_mem);
+               if (ret) {
+                       dev_err(dwmac->dev, "mem clock enable failed\n");
+                       return ret;
+               }
+
+               ret = clk_prepare_enable(dwmac->clk_tx);
+               if (ret) {
+                       dev_err(dwmac->dev, "tx clock enable failed\n");
+                       clk_disable_unprepare(dwmac->clk_mem);
+                       return ret;
+               }
+       } else {
+               clk_disable_unprepare(dwmac->clk_tx);
+               clk_disable_unprepare(dwmac->clk_mem);
+       }
+
+       return ret;
+}
+
 static int imx_dwmac_init(struct platform_device *pdev, void *priv)
 {
        struct plat_stmmacenet_data *plat_dat;
@@ -98,39 +124,18 @@ static int imx_dwmac_init(struct platform_device *pdev, 
void *priv)
 
        plat_dat = dwmac->plat_dat;
 
-       ret = clk_prepare_enable(dwmac->clk_mem);
-       if (ret) {
-               dev_err(&pdev->dev, "mem clock enable failed\n");
-               return ret;
-       }
-
-       ret = clk_prepare_enable(dwmac->clk_tx);
-       if (ret) {
-               dev_err(&pdev->dev, "tx clock enable failed\n");
-               goto clk_tx_en_failed;
-       }
-
        if (dwmac->ops->set_intf_mode) {
                ret = dwmac->ops->set_intf_mode(plat_dat);
                if (ret)
-                       goto intf_mode_failed;
+                       return ret;
        }
 
        return 0;
-
-intf_mode_failed:
-       clk_disable_unprepare(dwmac->clk_tx);
-clk_tx_en_failed:
-       clk_disable_unprepare(dwmac->clk_mem);
-       return ret;
 }
 
 static void imx_dwmac_exit(struct platform_device *pdev, void *priv)
 {
-       struct imx_priv_data *dwmac = priv;
-
-       clk_disable_unprepare(dwmac->clk_tx);
-       clk_disable_unprepare(dwmac->clk_mem);
+       /* nothing to do now */
 }
 
 static void imx_dwmac_fix_speed(void *priv, unsigned int speed)
@@ -249,10 +254,15 @@ static int imx_dwmac_probe(struct platform_device *pdev)
        plat_dat->addr64 = dwmac->ops->addr_width;
        plat_dat->init = imx_dwmac_init;
        plat_dat->exit = imx_dwmac_exit;
+       plat_dat->clks_config = imx_dwmac_clks_config;
        plat_dat->fix_mac_speed = imx_dwmac_fix_speed;
        plat_dat->bsp_priv = dwmac;
        dwmac->plat_dat = plat_dat;
 
+       ret = imx_dwmac_clks_config(dwmac, true);
+       if (ret)
+               goto err_clks_config;
+
        ret = imx_dwmac_init(pdev, dwmac);
        if (ret)
                goto err_dwmac_init;
@@ -263,9 +273,11 @@ static int imx_dwmac_probe(struct platform_device *pdev)
 
        return 0;
 
-err_dwmac_init:
 err_drv_probe:
        imx_dwmac_exit(pdev, plat_dat->bsp_priv);
+err_dwmac_init:
+       imx_dwmac_clks_config(dwmac, false);
+err_clks_config:
 err_parse_dt:
 err_match_data:
        stmmac_remove_config_dt(pdev, plat_dat);
-- 
2.17.1