[PATCH v3 3/4] nvmem: apple-spmi: improve calling safety with wrapper functions

[Link Mauve]

This driver used to cast the regmap_bulk_*() functions to void *,
bypassing any compiler safety around incompatible function pointers.

With two small wrappers, which just convert the void * priv parameter
into the wanted struct regmap *, we can remove the void * cast
altogether.

Signed-off-by: Link Mauve <linkmauve@xxxxxxxxxxxx>
---
 drivers/nvmem/apple-spmi-nvmem.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/drivers/nvmem/apple-spmi-nvmem.c b/drivers/nvmem/apple-spmi-nvmem.c
index cbf25c53d048..81d9e242c836 100644
--- a/drivers/nvmem/apple-spmi-nvmem.c
+++ b/drivers/nvmem/apple-spmi-nvmem.c
@@ -18,6 +18,20 @@ static const struct regmap_config apple_spmi_regmap_config = {
 	.max_register	= 0xffff,
 };
 
+static int apple_spmi_nvmem_read(void *priv, unsigned int offset,
+				 void *val, size_t bytes)
+{
+	struct regmap *regmap = priv;
+	return regmap_bulk_read(regmap, offset, val, bytes);
+}
+
+static int apple_spmi_nvmem_write(void *priv, unsigned int offset,
+				  const void *val, size_t bytes)
+{
+	struct regmap *regmap = priv;
+	return regmap_bulk_write(regmap, offset, val, bytes);
+}
+
 static int apple_spmi_nvmem_probe(struct spmi_device *sdev)
 {
 	struct regmap *regmap;
@@ -28,8 +42,8 @@ static int apple_spmi_nvmem_probe(struct spmi_device *sdev)
 		.word_size = 1,
 		.stride = 1,
 		.size = 0xffff,
-		.reg_read = (void *)regmap_bulk_read,
-		.reg_write_const = (void *)regmap_bulk_write,
+		.reg_read = apple_spmi_nvmem_read,
+		.reg_write_const = apple_spmi_nvmem_write,
 	};
 
 	regmap = devm_regmap_init_spmi_ext(sdev, &apple_spmi_regmap_config);
-- 
2.55.0