thermal: rcar: add read/write functions for common/priv data

R-Car thermal driver will use struct common in next
feature (interrupt support).
But the register address is different between struct priv and common.
This patch adds read/write functions for struct common,
and use macro technique to avoid wrong register access.

This is preparation patch for next feature (interrupt support),
therefore, there is no user to use this common read/write
function at this point.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

drivers/thermal/rcar_thermal.c

@@ -29,8 +29,8 @@
 
 #define IDLE_INTERVAL	5000
 
-#define THSCR	0x2c
-#define THSSR	0x30
+#define REG_THSCR	0x2c
+#define REG_THSSR	0x30
 
 /* THSCR */
 #define CPCTL	(1 << 12)
@@ -63,21 +63,55 @@ struct rcar_thermal_priv {
 /*
  *		basic functions
  */
-static u32 rcar_thermal_read(struct rcar_thermal_priv *priv, u32 reg)
+#if 0
+#define rcar_thermal_common_read(c, r) \
+	_rcar_thermal_common_read(c, COMMON_ ##r)
+static u32 _rcar_thermal_common_read(struct rcar_thermal_common *common,
+				     u32 reg)
+{
+	return ioread32(common->base + reg);
+}
+
+#define rcar_thermal_common_write(c, r, d) \
+	_rcar_thermal_common_write(c, COMMON_ ##r, d)
+static void _rcar_thermal_common_write(struct rcar_thermal_common *common,
+				       u32 reg, u32 data)
+{
+	iowrite32(data, common->base + reg);
+}
+
+#define rcar_thermal_common_bset(c, r, m, d) \
+	_rcar_thermal_common_bset(c, COMMON_ ##r, m, d)
+static void _rcar_thermal_common_bset(struct rcar_thermal_common *common,
+				      u32 reg, u32 mask, u32 data)
+{
+	u32 val;
+
+	val = ioread32(common->base + reg);
+	val &= ~mask;
+	val |= (data & mask);
+	iowrite32(val, common->base + reg);
+}
+#endif
+
+#define rcar_thermal_read(p, r) _rcar_thermal_read(p, REG_ ##r)
+static u32 _rcar_thermal_read(struct rcar_thermal_priv *priv, u32 reg)
 {
 	return ioread32(priv->base + reg);
 }
 
 #if 0 /* no user at this point */
-static void rcar_thermal_write(struct rcar_thermal_priv *priv,
-			       u32 reg, u32 data)
+#define rcar_thermal_write(p, r, d) _rcar_thermal_write(p, REG_ ##r, d)
+static void _rcar_thermal_write(struct rcar_thermal_priv *priv,
+				u32 reg, u32 data)
 {
 	iowrite32(data, priv->base + reg);
 }
 #endif
 
-static void rcar_thermal_bset(struct rcar_thermal_priv *priv, u32 reg,
-			      u32 mask, u32 data)
+#define rcar_thermal_bset(p, r, m, d) _rcar_thermal_bset(p, REG_ ##r, m, d)
+static void _rcar_thermal_bset(struct rcar_thermal_priv *priv, u32 reg,
+			       u32 mask, u32 data)
 {
 	u32 val;