cec: add cec drivers for m8baby

PD#141217: initial add cec drivers for m8baby

1. update dts config for m200;
2. update KConfig and Makefiles for compile cec drivers;
3. add driver files to support cec driver on m8baby

Change-Id: I8e96839542360e625c47c5c31f4ddd45b3b93bc7
Signed-off-by: Tao Zeng <tao.zeng@amlogic.com>

arch/arm/boot/dts/amlogic/meson8b.dtsi

@@ -527,6 +527,13 @@
 					function = "i2c_mst_ao";
 				};
 			};
+
+			hdmi_cec_1: hdmi_cec_1 {
+				mux {
+					groups = "hdmi_cec_1";
+					function = "hdmi_cec";
+				};
+			};
 		};
 dwc2_b {
 		compatible = "amlogic,dwc2";

arch/arm/boot/dts/amlogic/meson8b_m200.dts

@@ -228,6 +228,22 @@
 			status = "okay";
 		};
 	};
+
+	aocec: aocec{
+		compatible = "amlogic, amlogic-aocec";
+		device_name = "aocec";
+		status = "okay";
+		vendor_id = <0x000000>;
+		cec_osd_string = "MBox"; /* Max Chars: 14    */
+		cec_version = <6>; /* 5: 1.4, 6: 2.0 */
+		port_num = <1>;
+		arc_port_mask = <0x0>;
+		interrupts = <0 151 1>;
+		interrupt-names = "hdmi_aocec";
+		pinctrl-names = "hdmi_cec_1";
+		pinctrl-0=<&hdmi_cec_1>;
+		reg = <0xc8100000 0x200>;
+	};
 };
 
 &uart_AO {

arch/arm/configs/meson32_defconfig

@@ -66,6 +66,8 @@ CONFIG_AMLOGIC_INPUT=y
 CONFIG_AMLOGIC_SARADC=y
 CONFIG_AMLOGIC_MMC=y
 CONFIG_AMLOGIC_M8B_MMC=y
+CONFIG_AMLOGIC_CEC=y
+CONFIG_AMLOGIC_M8B_CEC=y
 CONFIG_AMLOGIC_POWER=y
 CONFIG_AMLOGIC_PMU_OF=y
 CONFIG_AMLOGIC_PMU=y

arch/arm64/configs/meson64_defconfig

@@ -233,6 +233,7 @@ CONFIG_AMLOGIC_MMC=y
 CONFIG_AMLOGIC_NAND=y
 CONFIG_AMLOGIC_VRTC=y
 CONFIG_AMLOGIC_SMARTCARD=y
+CONFIG_AMLOGIC_CEC=y
 CONFIG_AMLOGIC_AO_CEC=y
 CONFIG_AMLOGIC_SECURITY_KEY=y
 CONFIG_AMLOGIC_KEY_MANAGE=y

drivers/amlogic/Makefile

@@ -58,7 +58,7 @@ obj-$(CONFIG_AMLOGIC_VRTC)		+= vrtc/
 
 obj-$(CONFIG_AMLOGIC_SMARTCARD)		+= smartcard/
 
-obj-$(CONFIG_AMLOGIC_AO_CEC)		+= cec/
+obj-$(CONFIG_AMLOGIC_CEC)		+= cec/
 
 obj-$(CONFIG_AMLOGIC_SECURITY_KEY)	+= securitykey/
 

drivers/amlogic/cec/Kconfig

@@ -1,9 +1,28 @@
-menu "AO CEC Support"
+menuconfig AMLOGIC_CEC
+	bool "AMLOGIC CEC Support"
+	depends on AMLOGIC_DRIVER
+	default n
+	help
+		HDMI cec driver provide cec support on Amlogic SOC chips,
+		you can use this driver to implement cec features on TV/MBOX
+
+choice
+	prompt "Amlogic cec chip driver select"
+	depends on AMLOGIC_CEC
+	default AMLOGIC_AO_CEC
 
 config AMLOGIC_AO_CEC
-	bool "HDMI AO cec driver support"
+	bool "HDMI AO cec driver support for gx/gxl/gxm/txl/txlx"
+	depends on AMLOGIC_CEC
 	help
-		HDMI AO cec driver provide cec support on Amlogic SOC chips, you can
-		use this driver to implement cec features on TV/MBOX
+		HDMI cec driver provide cec support for gx/gxl/gxm/txl/txlx chips
+		select if your chip belongs
 
-endmenu
+config AMLOGIC_M8B_CEC
+	bool "HDMI CEC driver support for m8/m8b"
+	depends on MACH_MESON8B && AMLOGIC_CEC
+	help
+		HDMI CEC driver support for m8/m8b chips
+		Select if your chip belongs
+
+endchoice	#AMLOGIC_CEC

drivers/amlogic/cec/Makefile

@@ -1 +1,2 @@
 obj-$(CONFIG_AMLOGIC_AO_CEC)  += hdmi_ao_cec.o
+obj-$(CONFIG_AMLOGIC_M8B_CEC) += m8_ao_cec.o

include/linux/amlogic/media/vout/hdmi_tx/hdmi_tx_module.h

@@ -489,7 +489,7 @@ extern void hdmitx_event_notify(unsigned long state, void *arg);
 #else
 static inline struct hdmitx_dev *get_hdmitx_device(void)
 {
-urn NULL;
+	return NULL;
 }
 static inline int get_hpd_state(void)
 {