iio: expose shared parameter in IIO_ENUM_AVAILABLE

The shared parameter should be configurable based on its usage, and not
constrained to IIO_SHARED_BY_TYPE.

This patch aims to improve the flexibility in using the
IIO_ENUM_AVAILABLE define and avoid redefining custom iio enums that
expose the shared parameter.

An example is the ad5766.c driver where IIO_ENUM_AVAILABLE_SHARED was
defined in order to achieve `shared` parameter customization.

The current state of the IIO_ENUM_AVAILABLE implementation will imply
similar redefinitions each time a driver will require access to the
`shared` parameter. An example would be admv1013 driver which will
require custom device attribute for the frequency translation modes:
Quadrature I/Q mode and Intermediate Frequency mode.
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Link: https://lore.kernel.org/r/20211119085627.6348-1-antoniu.miclaus@analog.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/accel/bma180.c

@@ -658,7 +658,7 @@ static const struct iio_chan_spec_ext_info bma023_ext_info[] = {
 
 static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
 	IIO_ENUM("power_mode", IIO_SHARED_BY_TYPE, &bma180_power_mode_enum),
-	IIO_ENUM_AVAILABLE("power_mode", &bma180_power_mode_enum),
+	IIO_ENUM_AVAILABLE("power_mode", IIO_SHARED_BY_TYPE, &bma180_power_mode_enum),
 	IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix),
 	{ }
 };

drivers/iio/accel/mma9553.c

@@ -917,7 +917,7 @@ static const struct iio_enum mma9553_calibgender_enum = {
 
 static const struct iio_chan_spec_ext_info mma9553_ext_info[] = {
 	IIO_ENUM("calibgender", IIO_SHARED_BY_TYPE, &mma9553_calibgender_enum),
-	IIO_ENUM_AVAILABLE("calibgender", &mma9553_calibgender_enum),
+	IIO_ENUM_AVAILABLE("calibgender", IIO_SHARED_BY_TYPE, &mma9553_calibgender_enum),
 	{},
 };
 

drivers/iio/adc/ad7192.c

@@ -257,7 +257,8 @@ static const struct iio_chan_spec_ext_info ad7192_calibsys_ext_info[] = {
 	},
 	IIO_ENUM("sys_calibration_mode", IIO_SEPARATE,
 		 &ad7192_syscalib_mode_enum),
-	IIO_ENUM_AVAILABLE("sys_calibration_mode", &ad7192_syscalib_mode_enum),
+	IIO_ENUM_AVAILABLE("sys_calibration_mode", IIO_SHARED_BY_TYPE,
+			   &ad7192_syscalib_mode_enum),
 	{}
 };
 

drivers/iio/adc/hi8435.c

@@ -350,7 +350,7 @@ static const struct iio_enum hi8435_sensing_mode = {
 
 static const struct iio_chan_spec_ext_info hi8435_ext_info[] = {
 	IIO_ENUM("sensing_mode", IIO_SEPARATE, &hi8435_sensing_mode),
-	IIO_ENUM_AVAILABLE("sensing_mode", &hi8435_sensing_mode),
+	IIO_ENUM_AVAILABLE("sensing_mode", IIO_SHARED_BY_TYPE, &hi8435_sensing_mode),
 	{},
 };
 

drivers/iio/dac/ad5064.c

@@ -377,7 +377,7 @@ static const struct iio_chan_spec_ext_info ad5064_ext_info[] = {
 		.shared = IIO_SEPARATE,
 	},
 	IIO_ENUM("powerdown_mode", IIO_SEPARATE, &ad5064_powerdown_mode_enum),
-	IIO_ENUM_AVAILABLE("powerdown_mode", &ad5064_powerdown_mode_enum),
+	IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE, &ad5064_powerdown_mode_enum),
 	{ },
 };
 
@@ -389,7 +389,7 @@ static const struct iio_chan_spec_ext_info ltc2617_ext_info[] = {
 		.shared = IIO_SEPARATE,
 	},
 	IIO_ENUM("powerdown_mode", IIO_SEPARATE, &ltc2617_powerdown_mode_enum),
-	IIO_ENUM_AVAILABLE("powerdown_mode", &ltc2617_powerdown_mode_enum),
+	IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE, &ltc2617_powerdown_mode_enum),
 	{ },
 };
 

drivers/iio/dac/ad5380.c

@@ -249,7 +249,7 @@ static const struct iio_chan_spec_ext_info ad5380_ext_info[] = {
 	},
 	IIO_ENUM("powerdown_mode", IIO_SHARED_BY_TYPE,
 		 &ad5380_powerdown_mode_enum),
-	IIO_ENUM_AVAILABLE("powerdown_mode", &ad5380_powerdown_mode_enum),
+	IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE, &ad5380_powerdown_mode_enum),
 	{ },
 };
 

drivers/iio/dac/ad5446.c

@@ -142,7 +142,7 @@ static const struct iio_chan_spec_ext_info ad5446_ext_info_powerdown[] = {
 		.shared = IIO_SEPARATE,
 	},
 	IIO_ENUM("powerdown_mode", IIO_SEPARATE, &ad5446_powerdown_mode_enum),
-	IIO_ENUM_AVAILABLE("powerdown_mode", &ad5446_powerdown_mode_enum),
+	IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE, &ad5446_powerdown_mode_enum),
 	{ },
 };
 

drivers/iio/dac/ad5504.c

@@ -241,7 +241,7 @@ static const struct iio_chan_spec_ext_info ad5504_ext_info[] = {
 	},
 	IIO_ENUM("powerdown_mode", IIO_SHARED_BY_TYPE,
 		 &ad5504_powerdown_mode_enum),
-	IIO_ENUM_AVAILABLE("powerdown_mode", &ad5504_powerdown_mode_enum),
+	IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE, &ad5504_powerdown_mode_enum),
 	{ },
 };
 

drivers/iio/dac/ad5624r_spi.c

@@ -159,7 +159,7 @@ static const struct iio_chan_spec_ext_info ad5624r_ext_info[] = {
 	},
 	IIO_ENUM("powerdown_mode", IIO_SHARED_BY_TYPE,
 		 &ad5624r_powerdown_mode_enum),
-	IIO_ENUM_AVAILABLE("powerdown_mode", &ad5624r_powerdown_mode_enum),
+	IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE, &ad5624r_powerdown_mode_enum),
 	{ },
 };
 

drivers/iio/dac/ad5686.c

@@ -184,7 +184,7 @@ static const struct iio_chan_spec_ext_info ad5686_ext_info[] = {
 		.shared = IIO_SEPARATE,
 	},
 	IIO_ENUM("powerdown_mode", IIO_SEPARATE, &ad5686_powerdown_mode_enum),
-	IIO_ENUM_AVAILABLE("powerdown_mode", &ad5686_powerdown_mode_enum),
+	IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE, &ad5686_powerdown_mode_enum),
 	{ },
 };
 

drivers/iio/dac/ad5766.c

@@ -426,14 +426,6 @@ static ssize_t ad5766_write_ext(struct iio_dev *indio_dev,
 	.shared = _shared, \
 }
 
-#define IIO_ENUM_AVAILABLE_SHARED(_name, _shared, _e) \
-{ \
-	.name = (_name "_available"), \
-	.shared = _shared, \
-	.read = iio_enum_available_read, \
-	.private = (uintptr_t)(_e), \
-}
-
 static const struct iio_chan_spec_ext_info ad5766_ext_info[] = {
 
 	_AD5766_CHAN_EXT_INFO("dither_enable", AD5766_DITHER_ENABLE,
@@ -443,8 +435,7 @@ static const struct iio_chan_spec_ext_info ad5766_ext_info[] = {
 	_AD5766_CHAN_EXT_INFO("dither_source", AD5766_DITHER_SOURCE,
 			      IIO_SEPARATE),
 	IIO_ENUM("dither_scale", IIO_SEPARATE, &ad5766_dither_scale_enum),
-	IIO_ENUM_AVAILABLE_SHARED("dither_scale",
-				  IIO_SEPARATE,
+	IIO_ENUM_AVAILABLE("dither_scale", IIO_SEPARATE,
 			   &ad5766_dither_scale_enum),
 	{}
 };

drivers/iio/dac/ad5791.c

@@ -285,7 +285,7 @@ static const struct iio_chan_spec_ext_info ad5791_ext_info[] = {
 	},
 	IIO_ENUM("powerdown_mode", IIO_SHARED_BY_TYPE,
 		 &ad5791_powerdown_mode_enum),
-	IIO_ENUM_AVAILABLE("powerdown_mode", &ad5791_powerdown_mode_enum),
+	IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE, &ad5791_powerdown_mode_enum),
 	{ },
 };
 

drivers/iio/dac/max5821.c

@@ -137,7 +137,7 @@ static const struct iio_chan_spec_ext_info max5821_ext_info[] = {
 		.shared = IIO_SEPARATE,
 	},
 	IIO_ENUM("powerdown_mode", IIO_SEPARATE, &max5821_powerdown_mode_enum),
-	IIO_ENUM_AVAILABLE("powerdown_mode", &max5821_powerdown_mode_enum),
+	IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE, &max5821_powerdown_mode_enum),
 	{ },
 };
 

drivers/iio/dac/mcp4725.c

@@ -221,7 +221,7 @@ static const struct iio_chan_spec_ext_info mcp4725_ext_info[] = {
 	},
 	IIO_ENUM("powerdown_mode", IIO_SEPARATE,
 			&mcp472x_powerdown_mode_enum[MCP4725]),
-	IIO_ENUM_AVAILABLE("powerdown_mode",
+	IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE,
 			   &mcp472x_powerdown_mode_enum[MCP4725]),
 	{ },
 };
@@ -235,7 +235,7 @@ static const struct iio_chan_spec_ext_info mcp4726_ext_info[] = {
 	},
 	IIO_ENUM("powerdown_mode", IIO_SEPARATE,
 			&mcp472x_powerdown_mode_enum[MCP4726]),
-	IIO_ENUM_AVAILABLE("powerdown_mode",
+	IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE,
 			   &mcp472x_powerdown_mode_enum[MCP4726]),
 	{ },
 };

drivers/iio/dac/stm32-dac.c

@@ -246,7 +246,7 @@ static const struct iio_chan_spec_ext_info stm32_dac_ext_info[] = {
 		.shared = IIO_SEPARATE,
 	},
 	IIO_ENUM("powerdown_mode", IIO_SEPARATE, &stm32_dac_powerdown_mode_en),
-	IIO_ENUM_AVAILABLE("powerdown_mode", &stm32_dac_powerdown_mode_en),
+	IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE, &stm32_dac_powerdown_mode_en),
 	{},
 };
 

drivers/iio/dac/ti-dac082s085.c

@@ -160,7 +160,7 @@ static const struct iio_chan_spec_ext_info ti_dac_ext_info[] = {
 		.shared	   = IIO_SHARED_BY_TYPE,
 	},
 	IIO_ENUM("powerdown_mode", IIO_SHARED_BY_TYPE, &ti_dac_powerdown_mode),
-	IIO_ENUM_AVAILABLE("powerdown_mode", &ti_dac_powerdown_mode),
+	IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE, &ti_dac_powerdown_mode),
 	{ },
 };
 

drivers/iio/dac/ti-dac5571.c

@@ -212,7 +212,7 @@ static const struct iio_chan_spec_ext_info dac5571_ext_info[] = {
 		.shared	   = IIO_SEPARATE,
 	},
 	IIO_ENUM("powerdown_mode", IIO_SEPARATE, &dac5571_powerdown_mode),
-	IIO_ENUM_AVAILABLE("powerdown_mode", &dac5571_powerdown_mode),
+	IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE, &dac5571_powerdown_mode),
 	{},
 };
 

drivers/iio/dac/ti-dac7311.c

@@ -146,7 +146,7 @@ static const struct iio_chan_spec_ext_info ti_dac_ext_info[] = {
 		.shared	   = IIO_SHARED_BY_TYPE,
 	},
 	IIO_ENUM("powerdown_mode", IIO_SHARED_BY_TYPE, &ti_dac_powerdown_mode),
-	IIO_ENUM_AVAILABLE("powerdown_mode", &ti_dac_powerdown_mode),
+	IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE, &ti_dac_powerdown_mode),
 	{ },
 };
 

drivers/iio/magnetometer/hmc5843_core.c

@@ -246,7 +246,7 @@ static const struct iio_enum hmc5843_meas_conf_enum = {
 
 static const struct iio_chan_spec_ext_info hmc5843_ext_info[] = {
 	IIO_ENUM("meas_conf", IIO_SHARED_BY_TYPE, &hmc5843_meas_conf_enum),
-	IIO_ENUM_AVAILABLE("meas_conf", &hmc5843_meas_conf_enum),
+	IIO_ENUM_AVAILABLE("meas_conf", IIO_SHARED_BY_TYPE, &hmc5843_meas_conf_enum),
 	IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, hmc5843_get_mount_matrix),
 	{ }
 };
@@ -260,7 +260,7 @@ static const struct iio_enum hmc5983_meas_conf_enum = {
 
 static const struct iio_chan_spec_ext_info hmc5983_ext_info[] = {
 	IIO_ENUM("meas_conf", IIO_SHARED_BY_TYPE, &hmc5983_meas_conf_enum),
-	IIO_ENUM_AVAILABLE("meas_conf", &hmc5983_meas_conf_enum),
+	IIO_ENUM_AVAILABLE("meas_conf", IIO_SHARED_BY_TYPE, &hmc5983_meas_conf_enum),
 	IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, hmc5843_get_mount_matrix),
 	{ }
 };

drivers/iio/trigger/stm32-timer-trigger.c

@@ -696,9 +696,9 @@ static const struct iio_chan_spec_ext_info stm32_trigger_count_info[] = {
 		.write = stm32_count_set_preset
 	},
 	IIO_ENUM("enable_mode", IIO_SEPARATE, &stm32_enable_mode_enum),
-	IIO_ENUM_AVAILABLE("enable_mode", &stm32_enable_mode_enum),
+	IIO_ENUM_AVAILABLE("enable_mode", IIO_SHARED_BY_TYPE, &stm32_enable_mode_enum),
 	IIO_ENUM("trigger_mode", IIO_SEPARATE, &stm32_trigger_mode_enum),
-	IIO_ENUM_AVAILABLE("trigger_mode", &stm32_trigger_mode_enum),
+	IIO_ENUM_AVAILABLE("trigger_mode", IIO_SHARED_BY_TYPE, &stm32_trigger_mode_enum),
 	{}
 };
 

include/linux/iio/iio.h

@@ -103,15 +103,16 @@ ssize_t iio_enum_write(struct iio_dev *indio_dev,
 /**
  * IIO_ENUM_AVAILABLE() - Initialize enum available extended channel attribute
  * @_name:	Attribute name ("_available" will be appended to the name)
+ * @_shared:	Whether the attribute is shared between all channels
  * @_e:		Pointer to an iio_enum struct
  *
  * Creates a read only attribute which lists all the available enum items in a
  * space separated list. This should usually be used together with IIO_ENUM()
  */
-#define IIO_ENUM_AVAILABLE(_name, _e) \
+#define IIO_ENUM_AVAILABLE(_name, _shared, _e) \
 { \
 	.name = (_name "_available"), \
-	.shared = IIO_SHARED_BY_TYPE, \
+	.shared = _shared, \
 	.read = iio_enum_available_read, \
 	.private = (uintptr_t)(_e), \
 }