Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 259 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/serial/8250.yaml b/Documentation/devicetree/bindings/serial/8250.yaml
new file mode 100644
index 000000000..6258f5f59
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/8250.yaml
@@ -0,0 +1,259 @@
+# Copyright 2020 Lubomir Rintel <lkundrak@v3.sk>
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serial/8250.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: UART (Universal Asynchronous Receiver/Transmitter) bindings
+
+maintainers:
+  - devicetree@vger.kernel.org
+
+allOf:
+  - $ref: serial.yaml#
+  - if:
+      anyOf:
+        - required:
+            - aspeed,lpc-io-reg
+        - required:
+            - aspeed,lpc-interrupts
+        - required:
+            - aspeed,sirq-polarity-sense
+    then:
+      properties:
+        compatible:
+          const: aspeed,ast2500-vuart
+  - if:
+      properties:
+        compatible:
+          const: mrvl,mmp-uart
+    then:
+      properties:
+        reg-shift:
+          const: 2
+      required:
+        - reg-shift
+  - if:
+      not:
+        properties:
+          compatible:
+            items:
+              - enum:
+                  - ns8250
+                  - ns16450
+                  - ns16550
+                  - ns16550a
+    then:
+      anyOf:
+        - required: [ clock-frequency ]
+        - required: [ clocks ]
+
+properties:
+  compatible:
+    oneOf:
+      - const: ns8250
+      - const: ns16450
+      - const: ns16550
+      - const: ns16550a
+      - const: ns16850
+      - const: aspeed,ast2400-vuart
+      - const: aspeed,ast2500-vuart
+      - const: intel,xscale-uart
+      - const: mrvl,pxa-uart
+      - const: nuvoton,wpcm450-uart
+      - const: nuvoton,npcm750-uart
+      - const: nuvoton,npcm845-uart
+      - const: nvidia,tegra20-uart
+      - const: nxp,lpc3220-uart
+      - items:
+          - enum:
+              - exar,xr16l2552
+              - exar,xr16l2551
+              - exar,xr16l2550
+          - const: ns8250
+      - items:
+          - enum:
+              - altr,16550-FIFO32
+              - altr,16550-FIFO64
+              - altr,16550-FIFO128
+              - fsl,16550-FIFO64
+              - fsl,ns16550
+              - andestech,uart16550
+              - nxp,lpc1850-uart
+              - opencores,uart16550-rtlsvn105
+              - ti,da830-uart
+          - const: ns16550a
+      - items:
+          - enum:
+              - ns16750
+              - cavium,octeon-3860-uart
+              - xlnx,xps-uart16550-2.00.b
+              - ralink,rt2880-uart
+          - enum:
+              - ns16550 # Deprecated, unless the FIFO really is broken
+              - ns16550a
+      - items:
+          - enum:
+              - ralink,mt7620a-uart
+              - ralink,rt3052-uart
+              - ralink,rt3883-uart
+          - const: ralink,rt2880-uart
+          - enum:
+              - ns16550 # Deprecated, unless the FIFO really is broken
+              - ns16550a
+      - items:
+          - enum:
+              - mediatek,mt7622-btif
+              - mediatek,mt7623-btif
+          - const: mediatek,mtk-btif
+      - items:
+          - const: mrvl,mmp-uart
+          - const: intel,xscale-uart
+      - items:
+          - enum:
+              - nvidia,tegra30-uart
+              - nvidia,tegra114-uart
+              - nvidia,tegra124-uart
+              - nvidia,tegra210-uart
+              - nvidia,tegra186-uart
+              - nvidia,tegra194-uart
+              - nvidia,tegra234-uart
+          - const: nvidia,tegra20-uart
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clock-frequency: true
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  current-speed:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: The current active speed of the UART.
+
+  reg-offset:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      Offset to apply to the mapbase from the start of the registers.
+
+  reg-shift:
+    description: Quantity to shift the register offsets by.
+
+  reg-io-width:
+    description: |
+      The size (in bytes) of the IO accesses that should be performed on the
+      device. There are some systems that require 32-bit accesses to the
+      UART (e.g. TI davinci).
+
+  used-by-rtas:
+    type: boolean
+    description: |
+      Set to indicate that the port is in use by the OpenFirmware RTAS and
+      should not be registered.
+
+  no-loopback-test:
+    type: boolean
+    description: |
+      Set to indicate that the port does not implement loopback test mode.
+
+  fifo-size:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: The fifo size of the UART.
+
+  auto-flow-control:
+    type: boolean
+    description: |
+      One way to enable automatic flow control support. The driver is
+      allowed to detect support for the capability even without this
+      property.
+
+  tx-threshold:
+    description: |
+      Specify the TX FIFO low water indication for parts with programmable
+      TX FIFO thresholds.
+
+  overrun-throttle-ms:
+    description: |
+      How long to pause uart rx when input overrun is encountered.
+
+  rts-gpios: true
+  cts-gpios: true
+  dtr-gpios: true
+  dsr-gpios: true
+  rng-gpios: true
+  dcd-gpios: true
+
+  aspeed,sirq-polarity-sense:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description: |
+      Phandle to aspeed,ast2500-scu compatible syscon alongside register
+      offset and bit number to identify how the SIRQ polarity should be
+      configured. One possible data source is the LPC/eSPI mode bit. Only
+      applicable to aspeed,ast2500-vuart.
+    deprecated: true
+
+  aspeed,lpc-io-reg:
+    $ref: '/schemas/types.yaml#/definitions/uint32'
+    description: |
+      The VUART LPC address.  Only applicable to aspeed,ast2500-vuart.
+
+  aspeed,lpc-interrupts:
+    $ref: "/schemas/types.yaml#/definitions/uint32-array"
+    minItems: 2
+    maxItems: 2
+    description: |
+      A 2-cell property describing the VUART SIRQ number and SIRQ
+      polarity (IRQ_TYPE_LEVEL_LOW or IRQ_TYPE_LEVEL_HIGH).  Only
+      applicable to aspeed,ast2500-vuart.
+
+required:
+  - reg
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    serial@80230000 {
+        compatible = "ns8250";
+        reg = <0x80230000 0x100>;
+        interrupts = <10>;
+        reg-shift = <2>;
+        clock-frequency = <48000000>;
+    };
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    serial@49042000 {
+        compatible = "andestech,uart16550", "ns16550a";
+        reg = <0x49042000 0x400>;
+        interrupts = <80>;
+        clock-frequency = <48000000>;
+        cts-gpios = <&gpio3 5 GPIO_ACTIVE_LOW>;
+        rts-gpios = <&gpio3 6 GPIO_ACTIVE_LOW>;
+        dtr-gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
+        dsr-gpios = <&gpio1 13 GPIO_ACTIVE_LOW>;
+        dcd-gpios = <&gpio1 14 GPIO_ACTIVE_LOW>;
+        rng-gpios = <&gpio1 15 GPIO_ACTIVE_LOW>;
+    };
+  - |
+    #include <dt-bindings/clock/aspeed-clock.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    serial@1e787000 {
+        compatible = "aspeed,ast2500-vuart";
+        reg = <0x1e787000 0x40>;
+        reg-shift = <2>;
+        interrupts = <8>;
+        clocks = <&syscon ASPEED_CLK_APB>;
+        no-loopback-test;
+        aspeed,lpc-io-reg = <0x3f8>;
+        aspeed,lpc-interrupts = <4 IRQ_TYPE_LEVEL_LOW>;
+    };
+
+...