Add Apple Mac System Management Controller GPIOs

From: "Russell King (Oracle)" <[email protected]>
Date: Tue, 06 Sep 2022 14:19:29 +0100

Add a DT binding for the Apple Mac System Management Controller.

Signed-off-by Russell King (Oracle) <[email protected]>

---
 .../devicetree/bindings/mfd/apple,smc.yaml    | 61 +++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/apple,smc.yaml

Documentation/devicetree/bindings/mfd/apple,smc.yaml new file +61 -0

new file mode 100644
index 000000000000..168f237c2962
@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/apple,smc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple Mac System Management Controller
+
+maintainers:
+  - Hector Martin <[email protected]>
+
+description:
+  Apple Mac System Management Controller implements various functions
+  such as GPIO, RTC, power, reboot.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - apple,t6000-smc
+          - apple,t8103-smc
+          - apple,t8112-smc
+      - const: apple,smc
+
+  reg:
+    items:
+      - description: SMC area
+      - description: SRAM area
+
+  reg-names:
+    items:
+      - const: smc
+      - const: sram
+
+  mboxes:
+    maxItems: 1
+    description:
+      A phandle to the mailbox channel
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - mboxes
+
+examples:
+  - |
+    soc {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      smc@23e400000 {
+        compatible = "apple,t8103-smc", "apple,smc";
+        reg = <0x2 0x3e400000 0x0 0x4000>,
+               <0x2 0x3fe00000 0x0 0x100000>;
+        reg-names = "smc", "sram";
+        mboxes = <&smc_mbox>;
+      };
+    };

Signature · 7 lines

2.30.2


_______________________________________________
linux-arm-kernel mailing list
[email protected]
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Add a DT binding for the Apple Mac System Management Controller.

Signed-off-by Russell King (Oracle) <[email protected]>

---
 .../devicetree/bindings/mfd/apple,smc.yaml    | 61 +++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/apple,smc.yaml

Documentation/devicetree/bindings/mfd/apple,smc.yaml new file +28 -0

new file mode 100644
index 000000000000..168f237c2962
@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/apple,smc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple Mac System Management Controller
+
+maintainers:
+  - Hector Martin <[email protected]>
+
+description:
+  Apple Mac System Management Controller implements various functions
+  such as GPIO, RTC, power, reboot.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - apple,t6000-smc
+          - apple,t8103-smc
+          - apple,t8112-smc
+      - const: apple,smc
+
+  reg:
+    items:
+      - description: SMC area
+      - description: SRAM area

Documentation/devicetree/bindings/mfd/apple,smc.yaml new file +23 -0

+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - mboxes
+
+examples:
+  - |
+    soc {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      smc@23e400000 {
+        compatible = "apple,t8103-smc", "apple,smc";
+        reg = <0x2 0x3e400000 0x0 0x4000>,
+               <0x2 0x3fe00000 0x0 0x100000>;
+        reg-names = "smc", "sram";
+        mboxes = <&smc_mbox>;
+      };
+    };

Signature · 1 line

2.30.2

From: "Russell King (Oracle)" <[email protected]>
Date: Tue, 06 Sep 2022 14:19:34 +0100

Add the DT binding for the Apple Mac System Management Controller GPIOs.

Signed-off-by Russell King (Oracle) <[email protected]>

---
 .../devicetree/bindings/gpio/gpio-macsmc.yaml | 28 +++++++++++++++++++
 .../devicetree/bindings/mfd/apple,smc.yaml    |  4 +++
 2 files changed, 32 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-macsmc.yaml

Documentation/devicetree/bindings/gpio/gpio-macsmc.yaml new file +28 -0

new file mode 100644
index 000000000000..ee620fe50ca8
@@ -0,0 +1,28 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/gpio-macsmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple Mac System Management Controller GPIO
+
+maintainers:
+  - Hector Martin <[email protected]>
+
+description:
+  This describes the binding for the Apple Mac System Management Controller
+  GPIO block.
+
+properties:
+  gpio-controller: true
+  '#gpio-cells':
+    const: 2
+
+additionalProperties: false
+
+examples:
+  - |
+    smc_gpio: gpio {
+      gpio-controller;
+      #gpio-cells = <2>;
+    };

Documentation/devicetree/bindings/mfd/apple,smc.yaml +4 -0

index 168f237c2962..47e3cd58bf19 100644
@@ -37,6 +37,10 @@ title: Apple Mac System Management Controller
     description:
       A phandle to the mailbox channel
 
+patternProperties:
+  gpio:
+    $ref: /schemas/gpio/gpio-macsmc.yaml
+
 additionalProperties: false
 
 required:

Signature · 7 lines

2.30.2


_______________________________________________
linux-arm-kernel mailing list
[email protected]
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Add the DT binding for the Apple Mac System Management Controller GPIOs.

Signed-off-by Russell King (Oracle) <[email protected]>

---
 .../devicetree/bindings/gpio/gpio-macsmc.yaml | 28 +++++++++++++++++++
 .../devicetree/bindings/mfd/apple,smc.yaml    |  4 +++
 2 files changed, 32 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-macsmc.yaml

Documentation/devicetree/bindings/gpio/gpio-macsmc.yaml new file +18 -0

new file mode 100644
index 000000000000..ee620fe50ca8
@@ -0,0 +1,28 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/gpio-macsmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple Mac System Management Controller GPIO
+
+maintainers:
+  - Hector Martin <[email protected]>
+
+description:
+  This describes the binding for the Apple Mac System Management Controller
+  GPIO block.
+
+properties:
+  gpio-controller: true
+  '#gpio-cells':

Add the DT binding for the Apple Mac System Management Controller GPIOs.

Signed-off-by Russell King (Oracle) <[email protected]>

---
 .../devicetree/bindings/gpio/gpio-macsmc.yaml | 28 +++++++++++++++++++
 .../devicetree/bindings/mfd/apple,smc.yaml    |  4 +++
 2 files changed, 32 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-macsmc.yaml

Documentation/devicetree/bindings/gpio/gpio-macsmc.yaml new file +28 -0

new file mode 100644
index 000000000000..ee620fe50ca8
@@ -0,0 +1,28 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/gpio-macsmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple Mac System Management Controller GPIO
+
+maintainers:
+  - Hector Martin <[email protected]>
+
+description:
+  This describes the binding for the Apple Mac System Management Controller
+  GPIO block.
+
+properties:
+  gpio-controller: true
+  '#gpio-cells':
+    const: 2
+
+additionalProperties: false
+
+examples:
+  - |
+    smc_gpio: gpio {
+      gpio-controller;
+      #gpio-cells = <2>;
+    };

Documentation/devicetree/bindings/mfd/apple,smc.yaml +0 -0

index 168f237c2962..47e3cd58bf19 100644

Quoted 51 lines · Russell King (Oracle)

Add the DT binding for the Apple Mac System Management Controller GPIOs.

Signed-off-by Russell King (Oracle) <[email protected]>

---
 .../devicetree/bindings/gpio/gpio-macsmc.yaml | 28 +++++++++++++++++++
 .../devicetree/bindings/mfd/apple,smc.yaml    |  4 +++
 2 files changed, 32 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-macsmc.yaml

Documentation/devicetree/bindings/gpio/gpio-macsmc.yaml new file +28 -0

new file mode 100644
index 000000000000..ee620fe50ca8
@@ -0,0 +1,28 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/gpio-macsmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple Mac System Management Controller GPIO
+
+maintainers:
+  - Hector Martin <[email protected]>
+
+description:
+  This describes the binding for the Apple Mac System Management Controller
+  GPIO block.
+
+properties:
+  gpio-controller: true
+  '#gpio-cells':
+    const: 2
+
+additionalProperties: false
+
+examples:
+  - |
+    smc_gpio: gpio {
+      gpio-controller;
+      #gpio-cells = <2>;
+    };

Documentation/devicetree/bindings/mfd/apple,smc.yaml +0 -0

index 168f237c2962..47e3cd58bf19 100644
@@ -37,6 +37,10 @@ title: Apple Mac System Management Controller
     description:
       A phandle to the mailbox channel
 

Documentation/devicetree/bindings/mfd/apple,smc.yaml title: Apple Mac System Management Controller · line 41

Quoted 2 lines

Documentation/devicetree/bindings/mfd/apple,smc.yaml +2 -0

+patternProperties:
+  gpio:

This is not a pattern. Should be in properties.

Please run make dt_binding_check (see Documentation/devicetree/bindings/writing-schema.rst for instructions).

From: Hector Martin <[email protected]>

%p4cc is designed for DRM/V4L2 FOURCCs with their specific quirks, but it's useful to be able to print generic 4-character codes formatted as an integer. Extend it to add format specifiers for printing generic 32-bit FOURCCs with various endian semantics:

 Documentation/core-api/printk-formats.rst | 32 +++++++++++++++++++++
 lib/vsprintf.c                            | 35 +++++++++++++++++++----
 2 files changed, 61 insertions(+), 6 deletions(-)

Documentation/core-api/printk-formats.rst +0 -0

index 5e89497ba314..22c33398ec02 100644

From: Hector Martin <[email protected]>

%p4cc is designed for DRM/V4L2 FOURCCs with their specific quirks, but it's useful to be able to print generic 4-character codes formatted as an integer. Extend it to add format specifiers for printing generic 32-bit FOURCCs with various endian semantics:

%p4ch Host-endian
%p4cl Little-endian
%p4cb Big-endian
%p4cr Reverse-endian

The endianness determines how bytes are interpreted as a u32, and the FOURCC is then always printed MSByte-first (this is the opposite of V4L/DRM FOURCCs). This covers most practical cases, e.g. %p4cr would allow printing LSByte-first FOURCCs stored in host endian order (other than the hex form being in character order, not the integer value).

Documentation/core-api/printk-formats.rst +14 -0

@@ -625,6 +625,38 @@ Passed by reference.
 	%p4cc	Y10  little-endian (0x20303159)
 	%p4cc	NV12 big-endian (0xb231564e)
 
+Generic FourCC code
+-------------------
+
+::
+	%p4c[hnbl]	gP00 (0x67503030)
+
+Print a generic FourCC code, as both ASCII characters and its numerical
+value as hexadecimal.
+
+The additional ``h``, ``r``, ``b``, and ``l`` specifiers are used to specify
+host, reversed, big or little endian order data respectively. Host endian
+order means the data is interpreted as a 32-bit integer and the most
+significant byte is printed first; that is, the character code as printed
+matches the byte order stored in memory on big-endian systems, and is reversed

lib/vsprintf.c +16 -2

 	u32 orig, val;
 
-	if (fmt[1] != 'c' || fmt[2] != 'c')
+	if (fmt[1] != 'c')
 		return error_string(buf, end, "(%p4?)", spec);
 
 	if (check_pointer(&buf, end, fourcc, spec))
 		return buf;
 
 	orig = get_unaligned(fourcc);
-	val = orig & ~BIT(31);
+	switch (fmt[2]) {
+	case 'h':
+		val = orig;
+		break;
+	case 'r':
+		val = orig = swab32(orig);
+		break;
+	case 'l':
+		val = orig = le32_to_cpu(orig);
+		break;
+	case 'b':
+		val = orig = be32_to_cpu(orig);
+		break;
+	case 'c':
+		/* Pixel formats are printed LSB-first */

lib/vsprintf.c +0 -1

 		/* Print non-control ASCII characters as-is, dot otherwise */
 		*p++ = isascii(c) && isprint(c) ? c : '.';
 	}
 
-	*p++ = ' ';

Quoted 1 line · Russell King

From: Hector Martin <[email protected]>

lib/vsprintf.c char *fourcc_string(char *buf, char *end, const u32 *fourcc, · line 1793

Quoted 3 lines

lib/vsprintf.c +1 -1

 	for (i = 0; i < sizeof(u32); i++) {
-		unsigned char c = val >> (i * 8);
+		unsigned char c = val >> ((3 - i) * 8);

This hardcodes '3' but the for-cycle uses i < sizeof(u32). We should be consistent.

A solution would be:

	int i;

	for (i = sizeof(u32); --i >= 0;) {
		unsigned char c = val >> (i * 8);

Quoted 3 lines

lib/vsprintf.c +0 -0

 		/* Print non-control ASCII characters as-is, dot otherwise */
 		*p++ = isascii(c) && isprint(c) ? c : '.';
 	}

Quoted 2 lines · Russell King

From: Hector Martin <[email protected]>

Quoted 14 lines

Documentation/core-api/printk-formats.rst +14 -0

+Generic FourCC code
+-------------------
+
+::
+	%p4c[hnbl]	gP00 (0x67503030)
+
+Print a generic FourCC code, as both ASCII characters and its numerical
+value as hexadecimal.
+
+The additional ``h``, ``r``, ``b``, and ``l`` specifiers are used to specify
+host, reversed, big or little endian order data respectively. Host endian
+order means the data is interpreted as a 32-bit integer and the most
+significant byte is printed first; that is, the character code as printed
+matches the byte order stored in memory on big-endian systems, and is reversed

Documentation/core-api/printk-formats.rst Passed by reference. · line 651

Quoted 10 lines

Documentation/core-api/printk-formats.rst +10 -0

+on little-endian systems.
+
+Passed by reference.
+
+Examples for a little-endian machine, given &(u32)0x67503030::
+
+	%p4ch	gP00 (0x67503030)
+	%p4cl	gP00 (0x67503030)
+	%p4cb	00Pg (0x30305067)
+	%p4cr	00Pg (0x30305067)

Nit: I would prefer to keep the same order (h,r,b,l) everywhere.

I guess that you wanted to show exactly the same results next to each other. But it is not the case on big-endian anyway.

Quoted 3 lines · Petr Mladek

Quoted 2 lines · Russell King

From: Hector Martin <[email protected]>

...

Quoted 27 lines

Quoted 14 lines

Documentation/core-api/printk-formats.rst +14 -0

+Generic FourCC code
+-------------------
+
+::
+	%p4c[hnbl]	gP00 (0x67503030)
+
+Print a generic FourCC code, as both ASCII characters and its numerical
+value as hexadecimal.
+
+The additional ``h``, ``r``, ``b``, and ``l`` specifiers are used to specify
+host, reversed, big or little endian order data respectively. Host endian
+order means the data is interpreted as a 32-bit integer and the most
+significant byte is printed first; that is, the character code as printed
+matches the byte order stored in memory on big-endian systems, and is reversed

Documentation/core-api/printk-formats.rst Passed by reference. · line 651

Quoted 10 lines

Documentation/core-api/printk-formats.rst +10 -0

+on little-endian systems.
+
+Passed by reference.
+
+Examples for a little-endian machine, given &(u32)0x67503030::
+
+	%p4ch	gP00 (0x67503030)
+	%p4cl	gP00 (0x67503030)
+	%p4cb	00Pg (0x30305067)
+	%p4cr	00Pg (0x30305067)

Nit: I would prefer to keep the same order (h,r,b,l) everywhere.

Quoted 2 lines

I guess that you wanted to show exactly the same results next to each other. But it is not the case on big-endian anyway.

This is straight from the Asahi kernel tree, and is unmodified. I'm guessing you're use of "you" here refers to Hector rather than me.

So, Hector, any opinions on Petr's comments please?

From: Hector Martin <[email protected]>

This driver implements support for the SMC (System Management Controller) in Apple Macs. In contrast to the existing applesmc driver, it uses pluggable backends that allow it to support different SMC implementations, and uses the MFD subsystem to expose the core SMC functionality so that specific features (gpio, hwmon, battery, etc.) can be implemented by separate drivers in their respective downstream subsystems.

The initial RTKit backend adds support for Apple Silicon Macs (M1 et al). We hope a backend for T2 Macs will be written in the future (since those are not supported by applesmc), and eventually an x86 backend would allow us to fully deprecate applesmc in favor of this driver.

Signed-off-by Hector Martin <[email protected]>

Signed-off-by Russell King (Oracle) <[email protected]>

From: Hector Martin <[email protected]>

This driver implements the GPIO service on top of the SMC framework on Apple Mac machines. In particular, these are the GPIOs present in the PMU IC which are used to control power to certain on-board devices.

Although the underlying hardware supports various pin config settings (input/output, open drain, etc.), this driver does not implement that functionality and leaves it up to the firmware to configure things properly. We also don't yet support interrupts/events. This is sufficient for device power control, which is the only thing we need to support at this point. More features will be implemented when needed.

To our knowledge, only Apple Silicon Macs implement this SMC feature.

Signed-off-by Hector Martin <[email protected]>

Signed-off-by Russell King (Oracle) <[email protected]>

From: Hector Martin <[email protected]>

Signed-off-by Hector Martin <[email protected]>

Signed-off-by Russell King (Oracle) <[email protected]>

---
 arch/arm64/boot/dts/apple/t8103.dtsi | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

arch/arm64/boot/dts/apple/t8103.dtsi +4 -0

index 51a63b29d404..15c6023cf612 100644
@@ -336,6 +336,32 @@ wdt: watchdog@23d2b0000 {
 			interrupts = <AIC_IRQ 338 IRQ_TYPE_LEVEL_HIGH>;
 		};
 
+		smc_mbox: mbox@23e408000 {
+			compatible = "apple,t8103-asc-mailbox", "apple,asc-mailbox-v4";
+			reg = <0x2 0x3e408000 0x0 0x4000>;
+			interrupt-parent = <&aic>;

arch/arm64/boot/dts/apple/t8103.dtsi +12 -0

+			compatible = "apple,t8103-smc", "apple,smc";
+			reg = <0x2 0x3e400000 0x0 0x4000>,
+				<0x2 0x3fe00000 0x0 0x100000>;
+			reg-names = "smc", "sram";
+			mboxes = <&smc_mbox>;
+
+			smc_gpio: gpio {
+				gpio-controller;
+				#gpio-cells = <2>;
+			};
+		};
+
 		pinctrl_smc: pinctrl@23e820000 {
 			compatible = "apple,t8103-pinctrl", "apple,pinctrl";
 			reg = <0x2 0x3e820000 0x0 0x4000>;

Signature · 1 line

2.30.2

Quoted 28 lines · Russell King

From: Hector Martin <[email protected]>

Signed-off-by Hector Martin <[email protected]>

Signed-off-by Russell King (Oracle) <[email protected]>

---
 arch/arm64/boot/dts/apple/t8103.dtsi | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

arch/arm64/boot/dts/apple/t8103.dtsi +11 -0

index 51a63b29d404..15c6023cf612 100644
@@ -336,6 +336,32 @@ wdt: watchdog@23d2b0000 {
 			interrupts = <AIC_IRQ 338 IRQ_TYPE_LEVEL_HIGH>;
 		};
 
+		smc_mbox: mbox@23e408000 {
+			compatible = "apple,t8103-asc-mailbox", "apple,asc-mailbox-v4";
+			reg = <0x2 0x3e408000 0x0 0x4000>;
+			interrupt-parent = <&aic>;
+			interrupts = <AIC_IRQ 400 IRQ_TYPE_LEVEL_HIGH>,
+				<AIC_IRQ 401 IRQ_TYPE_LEVEL_HIGH>,
+				<AIC_IRQ 402 IRQ_TYPE_LEVEL_HIGH>,
+				<AIC_IRQ 403 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "send-empty", "send-not-empty",
+				"recv-empty", "recv-not-empty";
+			#mbox-cells = <0>;

arch/arm64/boot/dts/apple/t8103.dtsi wdt: watchdog@23d2b0000 { · line 352

Quoted 3 lines

arch/arm64/boot/dts/apple/t8103.dtsi +3 -0

+		};
+
+		smc: smc@23e400000 {

Usually we sort these nodes by their address to prevent merge conflicts. I guess it doesn't really matter here though since nothing will be between these two nodes.
Either way,

Reviewed-by Sven Peter <[email protected]>

From: Hector Martin <[email protected]>

Signed-off-by Hector Martin <[email protected]>

Signed-off-by Russell King (Oracle) <[email protected]>

---
 arch/arm64/boot/dts/apple/t8103.dtsi | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

This series adds support for the Apple Mac GPIO driver. These GPIOs are hadled via the System Management Controller.

The first two patches add the DT binding documentation for the new drivers. No changes from the first posting (I think there's still some discussion going on about how best to handle these.)

Hi,

[Andy dropped from the Cc lists; he's taking a break.]

This series adds support for the Apple Mac GPIO driver. These GPIOs are hadled via the System Management Controller.

The first two patches add the DT binding documentation for the new drivers. No changes from the first posting (I think there's still some discussion going on about how best to handle these.)

Patch 3 adds apple_rtkit_poll() and has had no changes since v1.

Patch 4 is new, extending the existing FourCC format code to be able to print other endian FourCC codes.

Patch 5 adds the SMC core and rtkit driver. Changes in v2 include properly limiting the data size (since it is limited to the width of the size fields in the mailbox messages, not the shmem size) and also to properly cleanup after failure to send the initialisation message.

Patch 6 adds the SMC GPIO support. Changes in v2 include some of the issues Andy pointed out,

Patch 7 is new, adding the SMC nodes to the dtsi.

Patches taken from the Asahi project.

 Documentation/core-api/printk-formats.rst          |  32 ++
 .../devicetree/bindings/gpio/gpio-macsmc.yaml      |  28 ++
 .../devicetree/bindings/mfd/apple,smc.yaml         |  65 +++
 arch/arm64/boot/dts/apple/t8103.dtsi               |  26 ++
 drivers/gpio/Kconfig                               |  11 +
 drivers/gpio/Makefile                              |   1 +
 drivers/gpio/gpio-macsmc.c                         | 242 +++++++++++
 drivers/platform/Kconfig                           |   2 +
 drivers/platform/Makefile                          |   1 +
 drivers/platform/apple/Kconfig                     |  49 +++
 drivers/platform/apple/Makefile                    |  11 +
 drivers/platform/apple/smc.h                       |  28 ++
 drivers/platform/apple/smc_core.c                  | 249 +++++++++++
 drivers/platform/apple/smc_rtkit.c                 | 453 +++++++++++++++++++++
 drivers/soc/apple/rtkit.c                          |   6 +
 include/linux/mfd/macsmc.h                         |  86 ++++
 include/linux/soc/apple/rtkit.h                    |  12 +
 lib/vsprintf.c                                     |  35 +-
 18 files changed, 1331 insertions(+), 6 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-macsmc.yaml
 create mode 100644 Documentation/devicetree/bindings/mfd/apple,smc.yaml
 create mode 100644 drivers/gpio/gpio-macsmc.c
 create mode 100644 drivers/platform/apple/Kconfig
 create mode 100644 drivers/platform/apple/Makefile
 create mode 100644 drivers/platform/apple/smc.h
 create mode 100644 drivers/platform/apple/smc_core.c
 create mode 100644 drivers/platform/apple/smc_rtkit.c
 create mode 100644 include/linux/mfd/macsmc.h

--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!