docs: misc-devices/apds990x.txt: convert to ReST format

- Adjust title markup;
- Adjust identation.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/444743782e5c8b8085d8016c8be3baabe4d23b53.1592203650.git.mchehab+huawei@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/misc-devices/apds990x.rst

@@ -1,3 +1,6 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+======================
 Kernel driver apds990x
 ======================
 
@@ -50,14 +53,18 @@ chip_id
 
 power_state
 	RW - enable / disable chip. Uses counting logic
+
 	     1 enables the chip
 	     0 disables the chip
 lux0_input
 	RO - measured lux value
+
 	     sysfs_notify called when threshold interrupt occurs
 
 lux0_sensor_range
-	RO - lux0_input max value. Actually never reaches since sensor tends
+	RO - lux0_input max value.
+
+	     Actually never reaches since sensor tends
 	     to saturate much before that. Real max value varies depending
 	     on the light spectrum etc.
 
@@ -68,7 +75,9 @@ lux0_rate_avail
 	RO - supported measurement rates
 
 lux0_calibscale
-	RW - calibration value. Set to neutral value by default.
+	RW - calibration value.
+
+	     Set to neutral value by default.
 	     Output results are multiplied with calibscale / calibscale_default
 	     value.
 
@@ -76,16 +85,21 @@ lux0_calibscale_default
 	RO - neutral calibration value
 
 lux0_thresh_above_value
-	RW - HI level threshold value. All results above the value
+	RW - HI level threshold value.
+
+	     All results above the value
 	     trigs an interrupt. 65535 (i.e. sensor_range) disables the above
 	     interrupt.
 
 lux0_thresh_below_value
-	RW - LO level threshold value. All results below the value
+	RW - LO level threshold value.
+
+	     All results below the value
 	     trigs an interrupt. 0 disables the below interrupt.
 
 prox0_raw
 	RO - measured proximity value
+
 	     sysfs_notify called when threshold interrupt occurs
 
 prox0_sensor_range
@@ -93,11 +107,14 @@ prox0_sensor_range
 
 prox0_raw_en
 	RW - enable / disable proximity - uses counting logic
-	     1 enables the proximity
-	     0 disables the proximity
+
+	     - 1 enables the proximity
+	     - 0 disables the proximity
 
 prox0_reporting_mode
-	RW - trigger / periodic. In "trigger" mode the driver tells two possible
+	RW - trigger / periodic.
+
+	     In "trigger" mode the driver tells two possible
 	     values: 0 or prox0_sensor_range value. 0 means no proximity,
 	     1023 means proximity. This causes minimal number of interrupts.
 	     In "periodic" mode the driver reports all values above

Documentation/misc-devices/index.rst

@@ -15,6 +15,7 @@ fit into other categories.
    :maxdepth: 2
 
    ad525x_dpot
+   apds990x
    bh1770glc
    eeprom
    c2port