dt-bindings: nfc: st,nci: convert to dtschema

Convert the ST NCI (ST21NFCB) NFC controller to DT schema format.

Changes during bindings conversion:
1. Add a new required "reg" property for SPI binding, because SPI child
   devices use it as chip-select.
2. Drop the "clock-frequency" property during conversion because it is a
   property of I2C bus controller, not I2C slave device.  It was also
   never used by the driver.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20211011073934.34340-7-krzysztof.kozlowski@canonical.com
Signed-off-by: Rob Herring <robh@kernel.org>

1 files changed, 0 insertions, 38 deletions

diff --git a/Documentation/devicetree/bindings/net/nfc/st-nci-i2c.txt b/Documentation/devicetree/bindings/net/nfc/st-nci-i2c.txt
deleted file mode 100644
index baa8f8133d19..000000000000
--- a/Documentation/devicetree/bindings/net/nfc/st-nci-i2c.txt
+++ /dev/null
@@ -1,38 +0,0 @@
-* STMicroelectronics SAS. ST NCI NFC Controller
-
-Required properties:
-- compatible: Should be "st,st21nfcb-i2c" or "st,st21nfcc-i2c".
-- clock-frequency: I²C work frequency.
-- reg: address on the bus
-- interrupts: GPIO interrupt to which the chip is connected
-- reset-gpios: Output GPIO pin used to reset the ST21NFCB
-
-Optional SoC Specific Properties:
-- pinctrl-names: Contains only one value - "default".
-- pintctrl-0: Specifies the pin control groups used for this controller.
-- ese-present: Specifies that an ese is physically connected to the nfc
-controller.
-- uicc-present: Specifies that the uicc swp signal can be physically
-connected to the nfc controller.
-
-Example (for ARM-based BeagleBoard xM with ST21NFCB on I2C2):
-
-&i2c2 {
-
-
-	st21nfcb: st21nfcb@8 {
-
-		compatible = "st,st21nfcb-i2c";
-
-		reg = <0x08>;
-		clock-frequency = <400000>;
-
-		interrupt-parent = <&gpio5>;
-		interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
-
-		reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>;
-
-		ese-present;
-		uicc-present;
-	};
-};