clk: mediatek: reset: Change return type for clock reset register function

To deal with error handling, we change the function return type from
void to int for mtk_clk_register_rst_ctrl().

Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Tested-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Link: https://lore.kernel.org/r/20220523093346.28493-10-rex-bc.chen@mediatek.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

diff --git a/drivers/clk/mediatek/reset.c b/drivers/clk/mediatek/reset.c
index 89e617e..b9718f0 100644 (file)
--- a/drivers/clk/mediatek/reset.c
+++ b/drivers/clk/mediatek/reset.c
@@ -110,8 +110,8 @@ static int reset_xlate(struct reset_controller_dev *rcdev,
        return data->desc->rst_idx_map[reset_spec->args[0]];
 }
 
-void mtk_register_reset_controller(struct device_node *np,
-                                  const struct mtk_clk_rst_desc *desc)
+int mtk_register_reset_controller(struct device_node *np,
+                                 const struct mtk_clk_rst_desc *desc)
 {
        struct regmap *regmap;
        const struct reset_control_ops *rcops = NULL;
@@ -120,7 +120,7 @@ void mtk_register_reset_controller(struct device_node *np,
 
        if (!desc) {
                pr_err("mtk clock reset desc is NULL\n");
-               return;
+               return -EINVAL;
        }
 
        switch (desc->version) {
@@ -132,18 +132,18 @@ void mtk_register_reset_controller(struct device_node *np,
                break;
        default:
                pr_err("Unknown reset version %d\n", desc->version);
-               return;
+               return -EINVAL;
        }
 
        regmap = device_node_to_regmap(np);
        if (IS_ERR(regmap)) {
                pr_err("Cannot find regmap for %pOF: %pe\n", np, regmap);
-               return;
+               return -EINVAL;
        }
 
        data = kzalloc(sizeof(*data), GFP_KERNEL);
        if (!data)
-               return;
+               return -ENOMEM;
 
        data->desc = desc;
        data->regmap = regmap;
@@ -163,7 +163,10 @@ void mtk_register_reset_controller(struct device_node *np,
        if (ret) {
                pr_err("could not register reset controller: %d\n", ret);
                kfree(data);
+               return ret;
        }
+
+       return 0;
 }
 
 MODULE_LICENSE("GPL");

diff --git a/drivers/clk/mediatek/reset.h b/drivers/clk/mediatek/reset.h
index cc847c6..260f25f 100644 (file)
--- a/drivers/clk/mediatek/reset.h
+++ b/drivers/clk/mediatek/reset.h
@@ -56,8 +56,10 @@ struct mtk_clk_rst_data {
  * mtk_register_reset_controller - Register MediaTek clock reset controller
  * @np: Pointer to device node.
  * @desc: Constant pointer to description of clock reset.
+ *
+ * Return: 0 on success and errorno otherwise.
  */
-void mtk_register_reset_controller(struct device_node *np,
-                                  const struct mtk_clk_rst_desc *desc);
+int mtk_register_reset_controller(struct device_node *np,
+                                 const struct mtk_clk_rst_desc *desc);
 
 #endif /* __DRV_CLK_MTK_RESET_H */