net: stmmac: platform: provide devm_stmmac_probe_config_dt()

Provide a devres variant of stmmac_probe_config_dt() that allows users to
skip calling stmmac_remove_config_dt() at driver detach.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20230623100417.93592-9-brgl@bgdev.pl
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 58d5c5c..82d8a1c 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -8,6 +8,7 @@
   Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
 *******************************************************************************/
 
+#include <linux/device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/module.h>
@@ -629,6 +630,39 @@ error_pclk_get:
        return ret;
 }
 
+static void devm_stmmac_remove_config_dt(void *data)
+{
+       struct plat_stmmacenet_data *plat = data;
+
+       /* Platform data argument is unused */
+       stmmac_remove_config_dt(NULL, plat);
+}
+
+/**
+ * devm_stmmac_probe_config_dt
+ * @pdev: platform_device structure
+ * @mac: MAC address to use
+ * Description: Devres variant of stmmac_probe_config_dt(). Does not require
+ * the user to call stmmac_remove_config_dt() at driver detach.
+ */
+struct plat_stmmacenet_data *
+devm_stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
+{
+       struct plat_stmmacenet_data *plat;
+       int ret;
+
+       plat = stmmac_probe_config_dt(pdev, mac);
+       if (IS_ERR(plat))
+               return plat;
+
+       ret = devm_add_action_or_reset(&pdev->dev,
+                                      devm_stmmac_remove_config_dt, plat);
+       if (ret)
+               return ERR_PTR(ret);
+
+       return plat;
+}
+
 /**
  * stmmac_remove_config_dt - undo the effects of stmmac_probe_config_dt()
  * @pdev: platform_device structure
@@ -651,12 +685,19 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
        return ERR_PTR(-EINVAL);
 }
 
+struct plat_stmmacenet_data *
+devm_stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
+{
+       return ERR_PTR(-EINVAL);
+}
+
 void stmmac_remove_config_dt(struct platform_device *pdev,
                             struct plat_stmmacenet_data *plat)
 {
 }
 #endif /* CONFIG_OF */
 EXPORT_SYMBOL_GPL(stmmac_probe_config_dt);
+EXPORT_SYMBOL_GPL(devm_stmmac_probe_config_dt);
 EXPORT_SYMBOL_GPL(stmmac_remove_config_dt);
 
 int stmmac_get_platform_resources(struct platform_device *pdev,

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.h b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.h
index af52d5a..8c1e5b2 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.h
@@ -13,6 +13,8 @@
 
 struct plat_stmmacenet_data *
 stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac);
+struct plat_stmmacenet_data *
+devm_stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac);
 void stmmac_remove_config_dt(struct platform_device *pdev,
                             struct plat_stmmacenet_data *plat);