iio: frequency: hmc7044: Add option to control the dynamic driver mode

It's desirable to control the dynamic driver option independent from the start-up mode dynamic. (Pulse generator / SYSREF mode) Signed-off-by: Michael Hennerich <[email protected]>
commodo · Aug 28, 2019 · 55e4495 · 55e4495
1 parent 9d6a091
commit 55e4495
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Showing 3 changed files with 12 additions and 1 deletion.
diff --git a/Documentation/devicetree/bindings/iio/frequency/hmc7044.txt b/Documentation/devicetree/bindings/iio/frequency/hmc7044.txt
@@ -70,6 +70,9 @@ Adding channels:
 	- adi,high-performance-mode-disable: Disables the high performance mode
 	- adi,startup-mode-dynamic-enable: Enables pulse generator mode
 		(default mode is asynchronous)
+	- adi,dynamic-driver-enable: Driver is dynamically disabled with pulse
+		generator events. (only in adi,startup-mode-dynamic-enable mode)
+		(default driver is enabled/disabled with the channel)
 	- adi,force-mute-enable: When not generating pulses in dynamic mode
 		the output is forced to logic-0
 	- adi,coarse-digital-delay:  Adjusts the phase of the divider signal

diff --git a/arch/microblaze/boot/dts/adi-dual-ad9208.dtsi b/arch/microblaze/boot/dts/adi-dual-ad9208.dtsi
@@ -49,6 +49,7 @@
 			adi,driver-mode = <HMC7044_DRIVER_MODE_LVDS>;	// LVDS
 			adi,startup-mode-dynamic-enable;
 			adi,high-performance-mode-disable;
+			adi,dynamic-driver-enable;
 		};
 		hmc7044_c2: channel@2 {
 			reg = <2>;
@@ -63,6 +64,7 @@
 			adi,driver-mode = <HMC7044_DRIVER_MODE_LVDS>;	// LVDS
 			adi,startup-mode-dynamic-enable;
 			adi,high-performance-mode-disable;
+			adi,dynamic-driver-enable;
 		};
 		hmc7044_c8: channel@8 {
 			reg = <8>;
@@ -83,6 +85,7 @@
 			adi,driver-mode = <HMC7044_DRIVER_MODE_LVDS>;	// LVDS
 			adi,startup-mode-dynamic-enable;
 			adi,high-performance-mode-disable;
+			adi,dynamic-driver-enable;
 		};
 		hmc7044_c11: channel@11 {
 			reg = <11>;
@@ -91,6 +94,7 @@
 			adi,driver-mode = <HMC7044_DRIVER_MODE_LVDS>;	// LVDS
 			adi,startup-mode-dynamic-enable;
 			adi,high-performance-mode-disable;
+			adi,dynamic-driver-enable;
 		};
 
 	};

diff --git a/drivers/iio/frequency/hmc7044.c b/drivers/iio/frequency/hmc7044.c
@@ -234,6 +234,7 @@ struct hmc7044_chan_spec {
 	bool			disable;
 	bool			high_performance_mode_dis;
 	bool			start_up_mode_dynamic_enable;
+	bool			dynamic_driver_enable;
 	bool			output_control0_rb4_enable;
 	bool			force_mute_enable;
 	unsigned int		divider;
@@ -902,7 +903,7 @@ static int hmc7044_setup(struct iio_dev *indio_dev)
 		hmc7044_write(indio_dev, HMC7044_REG_CH_OUT_CRTL_8(chan->num),
 			      HMC7044_DRIVER_MODE(chan->driver_mode) |
 			      HMC7044_DRIVER_Z_MODE(chan->driver_impedance) |
-			      (chan->start_up_mode_dynamic_enable ?
+			      (chan->dynamic_driver_enable ?
 			      HMC7044_DYN_DRIVER_EN : 0) |
 			      (chan->force_mute_enable ?
 			      HMC7044_FORCE_MUTE_EN : 0));
@@ -1088,6 +1089,9 @@ static int hmc7044_parse_dt(struct device *dev,
 		hmc->channels[cnt].start_up_mode_dynamic_enable =
 			of_property_read_bool(chan_np,
 					      "adi,startup-mode-dynamic-enable");
+		hmc->channels[cnt].dynamic_driver_enable =
+			of_property_read_bool(chan_np,
+					      "adi,dynamic-driver-enable");
 		hmc->channels[cnt].output_control0_rb4_enable =
 			of_property_read_bool(chan_np,
 					      "adi,control0-rb4-enable");