[media] smiapp: Allow generic quirk registers

Implement more generic quirk registers than just limit and capability
registers. This comes with the expense of a little bit more access time so
these should be only used when really needed.

Signed-off-by: Sakari Ailus <sakari.ailus@maxwell.research.nokia.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/smiapp/smiapp-quirk.h b/drivers/media/video/smiapp/smiapp-quirk.h
index de82cdf..f4dcaab 100644
--- a/drivers/media/video/smiapp/smiapp-quirk.h
+++ b/drivers/media/video/smiapp/smiapp-quirk.h
@@ -41,6 +41,7 @@
 	int (*post_poweron)(struct smiapp_sensor *sensor);
 	int (*pre_streamon)(struct smiapp_sensor *sensor);
 	int (*post_streamoff)(struct smiapp_sensor *sensor);
+	const struct smia_reg *regs;
 	unsigned long flags;
 };
 
@@ -55,6 +56,15 @@
 
 void smiapp_replace_limit(struct smiapp_sensor *sensor,
 			  u32 limit, u32 val);
+bool smiapp_quirk_reg(struct smiapp_sensor *sensor,
+		      u32 reg, u32 *val);
+
+#define SMIAPP_MK_QUIRK_REG(_reg, _val) \
+	{				\
+		.type = (_reg >> 16),	\
+		.reg = (u16)_reg,	\
+		.val = _val,		\
+	}
 
 #define smiapp_call_quirk(_sensor, _quirk, ...)				\
 	(_sensor->minfo.quirk &&					\