[media] ir-hix5hd2: make hisilicon,power-syscon property deprecated

The clock of IR can be provided by the clock provider and controlled
by common clock framework APIs.

Signed-off-by: Ruqiang Ju <[e-mail]>
Signed-off-by: Jiancheng Xue <[e-mail]>
Acked-by: Rob Herring <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

Documentation/devicetree/bindings/media/hix5hd2-ir.txt

···
 	  the device. The interrupt specifier format depends on the interrupt
 	  controller parent.
 	- clocks: clock phandle and specifier pair.
-	- hisilicon,power-syscon: phandle of syscon used to control power.
 
 Optional properties:
 	- linux,rc-map-name : Remote control map name.
+	- hisilicon,power-syscon: DEPRECATED. Don't use this in new dts files.
+		Provide correct clocks instead.
 
 Example node:
 
···
 		compatible = "hisilicon,hix5hd2-ir";
 		reg = <0xf8001000 0x1000>;
 		interrupts = <0 47 4>;
-		clocks = <&clock HIX5HD2_FIXED_24M>;
-		hisilicon,power-syscon = <&sysctrl>;
+		clocks = <&clock HIX5HD2_IR_CLOCK>;
 		linux,rc-map-name = "rc-tivo";
 	};

drivers/media/rc/ir-hix5hd2.c

···
 {
 	u32 val;
 
-	regmap_read(dev->regmap, IR_CLK, &val);
-	if (on) {
-		val &= ~IR_CLK_RESET;
-		val |= IR_CLK_ENABLE;
+	if (dev->regmap) {
+		regmap_read(dev->regmap, IR_CLK, &val);
+		if (on) {
+			val &= ~IR_CLK_RESET;
+			val |= IR_CLK_ENABLE;
+		} else {
+			val &= ~IR_CLK_ENABLE;
+			val |= IR_CLK_RESET;
+		}
+		regmap_write(dev->regmap, IR_CLK, val);
 	} else {
-		val &= ~IR_CLK_ENABLE;
-		val |= IR_CLK_RESET;
+		if (on)
+			clk_prepare_enable(dev->clock);
+		else
+			clk_disable_unprepare(dev->clock);
 	}
-	regmap_write(dev->regmap, IR_CLK, val);
 }
 
 static int hix5hd2_ir_config(struct hix5hd2_ir_priv *priv)
···
 	priv->regmap = syscon_regmap_lookup_by_phandle(node,
 						       "hisilicon,power-syscon");
 	if (IS_ERR(priv->regmap)) {
-		dev_err(dev, "no power-reg\n");
-		return -EINVAL;
+		dev_info(dev, "no power-reg\n");
+		priv->regmap = NULL;
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);