media: rc: introduce Meson IR blaster driver

This patch adds the driver for Amlogic Meson IR blaster.

Some Amlogic SoCs such as A311D and T950D4 have IR transmitter
(blaster) controller onboard. It is capable of sending IR
signals with arbitrary carrier frequency and duty cycle.

The driver supports 3 modulation clock sources:
 - sysclk
 - xtal3 clock (xtal divided by 3)
 - 1us clock

Signed-off-by: Viktor Prutyanov <viktor.prutyanov@phystech.edu>

drivers/media/rc/Kconfig

@@ -246,6 +246,16 @@ config IR_MESON
 	   To compile this driver as a module, choose M here: the
 	   module will be called meson-ir.
 
+config IR_MESON_IRBLASTER
+	tristate "Amlogic Meson IR blaster"
+	depends on ARCH_MESON || COMPILE_TEST
+	help
+	   Say Y if you want to use the IR blaster available on
+	   Amlogic Meson SoCs.
+
+	   To compile this driver as a module, choose M here: the
+	   module will be called meson-irblaster.
+
 config IR_MTK
 	tristate "Mediatek IR remote receiver"
 	depends on ARCH_MEDIATEK || COMPILE_TEST

drivers/media/rc/Makefile

@@ -28,6 +28,7 @@ obj-$(CONFIG_IR_ITE_CIR) += ite-cir.o
 obj-$(CONFIG_IR_MCEUSB) += mceusb.o
 obj-$(CONFIG_IR_FINTEK) += fintek-cir.o
 obj-$(CONFIG_IR_MESON) += meson-ir.o
+obj-$(CONFIG_IR_MESON_IRBLASTER) += meson-irblaster.o
 obj-$(CONFIG_IR_NUVOTON) += nuvoton-cir.o
 obj-$(CONFIG_IR_ENE) += ene_ir.o
 obj-$(CONFIG_IR_REDRAT3) += redrat3.o