This adds device tree bindings for the board management controller found
on the Kontron SMARC-sAL28 board.
Signed-off-by: Michael Walle <[email protected]>
---
.../bindings/gpio/kontron,sl28cpld-gpio.yaml | 51 ++++++
.../hwmon/kontron,sl28cpld-hwmon.yaml | 27 +++
.../bindings/mfd/kontron,sl28cpld.yaml | 162 ++++++++++++++++++
.../bindings/pwm/kontron,sl28cpld-pwm.yaml | 35 ++++
.../watchdog/kontron,sl28cpld-wdt.yaml | 35 ++++
5 files changed, 310 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpio/kontron,sl28cpld-gpio.yaml
create mode 100644 Documentation/devicetree/bindings/hwmon/kontron,sl28cpld-hwmon.yaml
create mode 100644 Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml
create mode 100644 Documentation/devicetree/bindings/pwm/kontron,sl28cpld-pwm.yaml
create mode 100644 Documentation/devicetree/bindings/watchdog/kontron,sl28cpld-wdt.yaml
diff --git a/Documentation/devicetree/bindings/gpio/kontron,sl28cpld-gpio.yaml b/Documentation/devicetree/bindings/gpio/kontron,sl28cpld-gpio.yaml
new file mode 100644
index 000000000000..291ca116743d
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/kontron,sl28cpld-gpio.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/kontron,sl28cpld-gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: GPIO driver for the sl28cpld board management controller
+
+maintainers:
+ - Michael Walle <[email protected]>
+
+description: |
+ This module is part of the sl28cpld multi-function device. For more
+ details see Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml.
+
+ There are three flavors of the GPIO controller, one full featured
+ input/output with interrupt support (kontron,sl28cpld-gpio), one
+ output-only (kontron,sl28-gpo) and one input-only (kontron,sl28-gpi).
+
+ Each controller supports 8 GPIO lines.
+
+properties:
+ compatible:
+ enum:
+ - kontron,sl28cpld-gpio
+ - kontron,sl28cpld-gpi
+ - kontron,sl28cpld-gpo
+
+ reg:
+ maxItems: 1
+
+ "#interrupt-cells":
+ const: 2
+
+ interrupt-controller: true
+
+ "#gpio-cells":
+ const: 2
+
+ gpio-controller: true
+
+ gpio-line-names:
+ minItems: 1
+ maxItems: 8
+
+required:
+ - compatible
+ - "#gpio-cells"
+ - gpio-controller
+
+additionalProperties: false
diff --git a/Documentation/devicetree/bindings/hwmon/kontron,sl28cpld-hwmon.yaml b/Documentation/devicetree/bindings/hwmon/kontron,sl28cpld-hwmon.yaml
new file mode 100644
index 000000000000..1cebd61c6c32
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/kontron,sl28cpld-hwmon.yaml
@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/kontron,sl28cpld-hwmon.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Hardware monitoring driver for the sl28cpld board management controller
+
+maintainers:
+ - Michael Walle <[email protected]>
+
+description: |
+ This module is part of the sl28cpld multi-function device. For more
+ details see Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml.
+
+properties:
+ compatible:
+ enum:
+ - kontron,sl28cpld-fan
+
+ reg:
+ maxItems: 1
+
+required:
+ - compatible
+
+additionalProperties: false
diff --git a/Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml b/Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml
new file mode 100644
index 000000000000..e155e3035513
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml
@@ -0,0 +1,162 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/kontron,sl28cpld.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Kontron's sl28cpld board management controller
+
+maintainers:
+ - Michael Walle <[email protected]>
+
+description: |
+ The board management controller may contain different IP blocks like
+ watchdog, fan monitoring, PWM controller, interrupt controller and a
+ GPIO controller.
+
+ Currently the MFD exports the following functions at the given
+ unit-addresses.
+
+ === =========== =======================
+ ua name compatible
+ === =========== =======================
+ 0 watchdog kontron,sl28cpld-wdt
+ 1 hwmon kontron,sl28cpld-fan
+ 2 pwm kontron,sl28cpld-pwm
+ 3 pwm kontron,sl28cpld-pwm
+ 4 gpio kontron,sl28cpld-gpio
+ 5 gpio kontron,sl28cpld-gpio
+ 6 gpio kontron,sl28cpld-gpo
+ 7 gpio kontron,sl28cpld-gpi
+ === =========== =======================
+
+ The MFD driver will match the child nodes according to the unit-address
+ (eg. the reg property) and the compatible string.
+
+properties:
+ compatible:
+ const: kontron,sl28cpld
+
+ reg:
+ description:
+ I2C device address.
+ maxItems: 1
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+ "#interrupt-cells":
+ const: 2
+
+ interrupts:
+ maxItems: 1
+
+ interrupt-controller: true
+
+patternProperties:
+ "^gpio(@[0-9]+)?$":
+ $ref: ../gpio/kontron,sl28cpld-gpio.yaml
+
+ "^hwmon(@[0-9]+)?$":
+ $ref: ../hwmon/kontron,sl28cpld-hwmon.yaml
+
+ "^pwm(@[0-9]+)?$":
+ $ref: ../pwm/kontron,sl28cpld-pwm.yaml
+
+ "^watchdog(@[0-9]+)?$":
+ $ref: ../watchdog/kontron,sl28cpld-wdt.yaml
+
+required:
+ - "#address-cells"
+ - "#size-cells"
+ - compatible
+ - reg
+ - interrupts
+ - "#interrupt-cells"
+ - interrupt-controller
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ sl28cpld@4a {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "kontron,sl28cpld";
+ reg = <0x4a>;
+ interrupts-extended = <&gpio2 6 IRQ_TYPE_EDGE_FALLING>;
+
+ #interrupt-cells = <2>;
+ interrupt-controller;
+
+ watchdog@0 {
+ compatible = "kontron,sl28cpld-wdt";
+ reg = <0>;
+ kontron,assert-wdt-timeout-pin;
+ };
+
+ hwmon@1 {
+ compatible = "kontron,sl28cpld-fan";
+ reg = <1>;
+ };
+
+ pwm@2 {
+ compatible = "kontron,sl28cpld-pwm";
+ reg = <2>;
+ #pwm-cells = <2>;
+ };
+
+ pwm@3 {
+ compatible = "kontron,sl28cpld-pwm";
+ reg = <3>;
+ #pwm-cells = <2>;
+ };
+
+ gpio@4 {
+ compatible = "kontron,sl28cpld-gpio";
+ reg = <4>;
+
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ };
+
+ gpio@5 {
+ compatible = "kontron,sl28cpld-gpio";
+ reg = <5>;
+
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ };
+
+ gpio@6 {
+ compatible = "kontron,sl28cpld-gpo";
+ reg = <6>;
+
+ gpio-controller;
+ #gpio-cells = <2>;
+ gpio-line-names = "a", "b", "c";
+ };
+
+ gpio@7 {
+ compatible = "kontron,sl28cpld-gpi";
+ reg = <7>;
+
+ gpio-controller;
+ #gpio-cells = <2>;
+ };
+ };
+ };
diff --git a/Documentation/devicetree/bindings/pwm/kontron,sl28cpld-pwm.yaml b/Documentation/devicetree/bindings/pwm/kontron,sl28cpld-pwm.yaml
new file mode 100644
index 000000000000..02fe88c30233
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/kontron,sl28cpld-pwm.yaml
@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/kontron,sl28cpld-pwm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: PWM driver for the sl28cpld board management controller
+
+maintainers:
+ - Michael Walle <[email protected]>
+
+description: |
+ This module is part of the sl28cpld multi-function device. For more
+ details see Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml.
+
+ The controller supports one PWM channel and supports only four distinct
+ frequencies (250Hz, 500Hz, 1kHz, 2kHz).
+
+allOf:
+ - $ref: pwm.yaml#
+
+properties:
+ compatible:
+ const: kontron,sl28cpld-pwm
+
+ reg:
+ maxItems: 1
+
+ "#pwm-cells":
+ const: 2
+
+required:
+ - compatible
+
+additionalProperties: false
diff --git a/Documentation/devicetree/bindings/watchdog/kontron,sl28cpld-wdt.yaml b/Documentation/devicetree/bindings/watchdog/kontron,sl28cpld-wdt.yaml
new file mode 100644
index 000000000000..dd6559f2973a
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/kontron,sl28cpld-wdt.yaml
@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/kontron,sl28cpld-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Watchdog driver for the sl28cpld board management controller
+
+maintainers:
+ - Michael Walle <[email protected]>
+
+description: |
+ This module is part of the sl28cpld multi-function device. For more
+ details see Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml.
+
+allOf:
+ - $ref: watchdog.yaml#
+
+properties:
+ compatible:
+ const: kontron,sl28cpld-wdt
+
+ reg:
+ maxItems: 1
+
+ kontron,assert-wdt-timeout-pin:
+ description: The SMARC standard defines a WDT_TIME_OUT# pin. If this
+ property is set, this output will be pulsed when the watchdog bites
+ and the system resets.
+ type: boolean
+
+required:
+ - compatible
+
+additionalProperties: false
--
2.20.1
On Thu, Apr 23, 2020 at 07:45:31PM +0200, Michael Walle wrote:
> This adds device tree bindings for the board management controller found
> on the Kontron SMARC-sAL28 board.
I think it should be independent patches (same way as you do for drivers).
> .../bindings/gpio/kontron,sl28cpld-gpio.yaml | 51 ++++++
> .../hwmon/kontron,sl28cpld-hwmon.yaml | 27 +++
> .../bindings/mfd/kontron,sl28cpld.yaml | 162 ++++++++++++++++++
> .../bindings/pwm/kontron,sl28cpld-pwm.yaml | 35 ++++
> .../watchdog/kontron,sl28cpld-wdt.yaml | 35 ++++
--
With Best Regards,
Andy Shevchenko
Am 2020-04-28 14:48, schrieb Andy Shevchenko:
> On Thu, Apr 23, 2020 at 07:45:31PM +0200, Michael Walle wrote:
>> This adds device tree bindings for the board management controller
>> found
>> on the Kontron SMARC-sAL28 board.
>
> I think it should be independent patches (same way as you do for
> drivers).
It used to be several patches but Rob suggested to put it into one:
https://lore.kernel.org/linux-devicetree/20200330223535.GA31402@bogus/
-michael
>
>> .../bindings/gpio/kontron,sl28cpld-gpio.yaml | 51 ++++++
>> .../hwmon/kontron,sl28cpld-hwmon.yaml | 27 +++
>> .../bindings/mfd/kontron,sl28cpld.yaml | 162
>> ++++++++++++++++++
>> .../bindings/pwm/kontron,sl28cpld-pwm.yaml | 35 ++++
>> .../watchdog/kontron,sl28cpld-wdt.yaml | 35 ++++
On Tue, Apr 28, 2020 at 04:39:44PM +0200, Michael Walle wrote:
> Am 2020-04-28 14:48, schrieb Andy Shevchenko:
> > On Thu, Apr 23, 2020 at 07:45:31PM +0200, Michael Walle wrote:
> > > This adds device tree bindings for the board management controller
> > > found
> > > on the Kontron SMARC-sAL28 board.
> >
> > I think it should be independent patches (same way as you do for
> > drivers).
>
> It used to be several patches but Rob suggested to put it into one:
> https://lore.kernel.org/linux-devicetree/20200330223535.GA31402@bogus/
Ah, okay.
--
With Best Regards,
Andy Shevchenko