dt-bindings: Add missing array size constraints

DT properties which can have multiple entries need to specify what the
entries are and define how many entries there can be. In the case of
only a single entry, just 'maxItems: 1' is sufficient.

Add the missing entry constraints. These were found with a modified
meta-schema. Unfortunately, there are a few cases where the size
constraints are not defined such as common bindings, so the meta-schema
can't be part of the normal checks.

Cc: Jens Axboe <axboe@kernel.dk>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Cc: Chanwoo Choi <cw00.choi@samsung.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Sebastian Reichel <sre@kernel.org>
Cc: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Sebastian Reichel <sre@kernel.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> #for-iio
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: Suman Anna <s-anna@ti.com>
Acked-by: Paul Cercueil <paul@crapouillou.net>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210104230253.2805217-1-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>

7 files changed, 9 insertions, 1 deletions

diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml
index 924477dfb833..a85a28145ef6 100644
--- a/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml
@@ -40,6 +40,7 @@ properties:
       ADC reference voltage supply
 
   adi,sync-in-gpios:
+    maxItems: 1
     description:
       Enables synchronization of multiple devices that require simultaneous
       sampling. A pulse is always required if the configuration is changed
@@ -76,6 +77,7 @@ patternProperties:
 
     properties:
       reg:
+        maxItems: 1
         description: |
           The channel number.
 
diff --git a/Documentation/devicetree/bindings/iio/adc/aspeed,ast2400-adc.yaml b/Documentation/devicetree/bindings/iio/adc/aspeed,ast2400-adc.yaml
index 7f534a933e92..a726b6c2ab65 100644
--- a/Documentation/devicetree/bindings/iio/adc/aspeed,ast2400-adc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/aspeed,ast2400-adc.yaml
@@ -23,6 +23,7 @@ properties:
     maxItems: 1
 
   clocks:
+    maxItems: 1
     description:
       Input clock used to derive the sample clock. Expected to be the
       SoC's APB clock.
diff --git a/Documentation/devicetree/bindings/iio/adc/lltc,ltc2496.yaml b/Documentation/devicetree/bindings/iio/adc/lltc,ltc2496.yaml
index 2716d4e95329..0bd2fc0356c8 100644
--- a/Documentation/devicetree/bindings/iio/adc/lltc,ltc2496.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/lltc,ltc2496.yaml
@@ -20,7 +20,7 @@ properties:
     description: Power supply for the reference voltage
 
   reg:
-    description: spi chipselect number according to the usual spi bindings
+    maxItems: 1
 
   spi-max-frequency:
     description: maximal spi bus frequency supported
diff --git a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml
index 95cc705b961b..74a4a9d95798 100644
--- a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml
@@ -68,6 +68,7 @@ patternProperties:
 
     properties:
       reg:
+        maxItems: 1
         description: |
           ADC channel number.
           See include/dt-bindings/iio/qcom,spmi-vadc.h
diff --git a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.yaml b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.yaml
index 28417b31b558..6364ede9bb5f 100644
--- a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.yaml
@@ -41,6 +41,8 @@ properties:
     maxItems: 2
 
   clocks:
+    minItems: 1
+    maxItems: 2
     description: |
       Core can use up to two clocks, depending on part used:
         - "adc" clock: for the analog circuitry, common to all ADCs.
diff --git a/Documentation/devicetree/bindings/iio/magnetometer/asahi-kasei,ak8975.yaml b/Documentation/devicetree/bindings/iio/magnetometer/asahi-kasei,ak8975.yaml
index a25590a16ba7..a0a1ffe017df 100644
--- a/Documentation/devicetree/bindings/iio/magnetometer/asahi-kasei,ak8975.yaml
+++ b/Documentation/devicetree/bindings/iio/magnetometer/asahi-kasei,ak8975.yaml
@@ -47,6 +47,7 @@ properties:
     description: an optional 3x3 mounting rotation matrix.
 
   reset-gpios:
+    maxItems: 1
     description: |
       an optional pin needed for AK09911 to set the reset state. This should
       be usually active low
diff --git a/Documentation/devicetree/bindings/iio/potentiometer/adi,ad5272.yaml b/Documentation/devicetree/bindings/iio/potentiometer/adi,ad5272.yaml
index 1aee9f9be951..0ebb6725a1af 100644
--- a/Documentation/devicetree/bindings/iio/potentiometer/adi,ad5272.yaml
+++ b/Documentation/devicetree/bindings/iio/potentiometer/adi,ad5272.yaml
@@ -25,6 +25,7 @@ properties:
     maxItems: 1
 
   reset-gpios:
+    maxItems: 1
     description:
       Active low signal to the AD5272 RESET input.