net: stmmac: platform: use optional clk/reset get APIs

Use the devm_reset_control_get_optional() and devm_clk_get_optional()
rather than open coding them.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/20201112092606.5173aa6f@xhacker.debian
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index af34a4c..6dc9f10 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -399,6 +399,7 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
        struct device_node *np = pdev->dev.of_node;
        struct plat_stmmacenet_data *plat;
        struct stmmac_dma_cfg *dma_cfg;
+       void *ret;
        int rc;
 
        plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
@@ -576,12 +577,10 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
                clk_prepare_enable(plat->stmmac_clk);
        }
 
-       plat->pclk = devm_clk_get(&pdev->dev, "pclk");
+       plat->pclk = devm_clk_get_optional(&pdev->dev, "pclk");
        if (IS_ERR(plat->pclk)) {
-               if (PTR_ERR(plat->pclk) == -EPROBE_DEFER)
-                       goto error_pclk_get;
-
-               plat->pclk = NULL;
+               ret = plat->pclk;
+               goto error_pclk_get;
        }
        clk_prepare_enable(plat->pclk);
 
@@ -596,14 +595,11 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
                dev_dbg(&pdev->dev, "PTP rate %d\n", plat->clk_ptp_rate);
        }
 
-       plat->stmmac_rst = devm_reset_control_get(&pdev->dev,
-                                                 STMMAC_RESOURCE_NAME);
+       plat->stmmac_rst = devm_reset_control_get_optional(&pdev->dev,
+                                                          STMMAC_RESOURCE_NAME);
        if (IS_ERR(plat->stmmac_rst)) {
-               if (PTR_ERR(plat->stmmac_rst) == -EPROBE_DEFER)
-                       goto error_hw_init;
-
-               dev_info(&pdev->dev, "no reset control found\n");
-               plat->stmmac_rst = NULL;
+               ret = plat->stmmac_rst;
+               goto error_hw_init;
        }
 
        return plat;
@@ -613,7 +609,7 @@ error_hw_init:
 error_pclk_get:
        clk_disable_unprepare(plat->stmmac_clk);
 
-       return ERR_PTR(-EPROBE_DEFER);
+       return ret;
 }
 
 /**