media: imx: imx7_mipi_csis: Turn register access macros into functions

Make it easier to instrument register access (for instance with
printk-based logging) by turning the macros into inline functions.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/imx/imx7-mipi-csis.c

@@ -358,8 +358,15 @@ static const struct csis_pix_format mipi_csis_formats[] = {
 	}
 };
 
-#define mipi_csis_write(__csis, __r, __v) writel(__v, (__csis)->regs + (__r))
-#define mipi_csis_read(__csis, __r) readl((__csis)->regs + (__r))
+static inline void mipi_csis_write(struct csi_state *state, u32 reg, u32 val)
+{
+	writel(val, state->regs + reg);
+}
+
+static inline u32 mipi_csis_read(struct csi_state *state, u32 reg)
+{
+	return readl(state->regs + reg);
+}
 
 static int mipi_csis_dump_regs(struct csi_state *state)
 {