[PATCH 1/3] dt-bindings: vendor-prefixes: Add prefix for SIE

[PATCH 1/3] dt-bindings: vendor-prefixes: Add prefix for SIE

[Shawn Anastasio]

Add a vendor prefix for Sony Interactive Entertainment LLC (SIE).

Signed-off-by: Shawn Anastasio <sanastasio@raptorengineering.com>
---
 Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index 573578db9509..cff35e68a34d 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -1211,6 +1211,8 @@ patternProperties:
     description: Si-En Technology Ltd.
   "^si-linux,.*":
     description: Silicon Linux Corporation
+  "^sie,.*":
+    description: Sony Interactive Entertainment LLC
   "^siemens,.*":
     description: Siemens AG
   "^sifive,.*":
-- 
2.30.2

Re: [PATCH 1/3] dt-bindings: vendor-prefixes: Add prefix for SIE

[Krzysztof Kozlowski]

On 03/10/2023 00:32, Shawn Anastasio wrote:
> Add a vendor prefix for Sony Interactive Entertainment LLC (SIE).
> 
> Signed-off-by: Shawn Anastasio <sanastasio@raptorengineering.com>
> ---
>  Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> index 573578db9509..cff35e68a34d 100644
> --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
> +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> @@ -1211,6 +1211,8 @@ patternProperties:
>      description: Si-En Technology Ltd.
>    "^si-linux,.*":
>      description: Silicon Linux Corporation
> +  "^sie,.*":
> +    description: Sony Interactive Entertainment LLC

Is this different company than Sony?

Best regards,
Krzysztof

Re: [PATCH 1/3] dt-bindings: vendor-prefixes: Add prefix for SIE

[Shawn Anastasio]

On 10/3/23 4:23 AM, Krzysztof Kozlowski wrote:
> On 03/10/2023 00:32, Shawn Anastasio wrote:
>> Add a vendor prefix for Sony Interactive Entertainment LLC (SIE).
>>
>> Signed-off-by: Shawn Anastasio <sanastasio@raptorengineering.com>
>> ---
>>  Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++
>>  1 file changed, 2 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
>> index 573578db9509..cff35e68a34d 100644
>> --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
>> +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
>> @@ -1211,6 +1211,8 @@ patternProperties:
>>      description: Si-En Technology Ltd.
>>    "^si-linux,.*":
>>      description: Silicon Linux Corporation
>> +  "^sie,.*":
>> +    description: Sony Interactive Entertainment LLC
> 
> Is this different company than Sony?
>

Yes. As I understand it, Sony Interactive Entertainment, LLC is its own
separate corporate entity, though it is ultimately owned by Sony Group
Corporation.

> Best regards,
> Krzysztof

Thanks,
Shawn

Re: [PATCH 1/3] dt-bindings: vendor-prefixes: Add prefix for SIE

[Krzysztof Kozlowski]

On 09/10/2023 22:54, Shawn Anastasio wrote:
> On 10/3/23 4:23 AM, Krzysztof Kozlowski wrote:
>> On 03/10/2023 00:32, Shawn Anastasio wrote:
>>> Add a vendor prefix for Sony Interactive Entertainment LLC (SIE).
>>>
>>> Signed-off-by: Shawn Anastasio <sanastasio@raptorengineering.com>
>>> ---
>>>  Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++
>>>  1 file changed, 2 insertions(+)
>>>
>>> diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
>>> index 573578db9509..cff35e68a34d 100644
>>> --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
>>> +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
>>> @@ -1211,6 +1211,8 @@ patternProperties:
>>>      description: Si-En Technology Ltd.
>>>    "^si-linux,.*":
>>>      description: Silicon Linux Corporation
>>> +  "^sie,.*":
>>> +    description: Sony Interactive Entertainment LLC
>>
>> Is this different company than Sony?
>>
> 
> Yes. As I understand it, Sony Interactive Entertainment, LLC is its own
> separate corporate entity, though it is ultimately owned by Sony Group
> Corporation.

Then why different name? We do not have 10 different Samsungs (there are
a lot of them) or LGs.

Best regards,
Krzysztof

[PATCH 2/3] dt-bindings: mfd: sie,cronos-cpld: Add initial DT binding

[Shawn Anastasio]

The SIE Cronos Platform Controller CPLD is a multi-purpose platform
controller that provides both a watchdog timer and an LED controller. As
both functions are provided by the same CPLD, a multi-function device is
exposed as the parent of both functions.

Add a DT binding for this device.

Signed-off-by: Shawn Anastasio <sanastasio@raptorengineering.com>
---
 .../bindings/mfd/sie,cronos-cpld.yaml         | 67 +++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/sie,cronos-cpld.yaml

diff --git a/Documentation/devicetree/bindings/mfd/sie,cronos-cpld.yaml b/Documentation/devicetree/bindings/mfd/sie,cronos-cpld.yaml
new file mode 100644
index 000000000000..3b59cdd46243
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/sie,cronos-cpld.yaml
@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2023 Raptor Engineering, LLC
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/sie,cronos-cpld.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SIE Cronos Platform Controller CPLD multi-function device
+
+maintainers:
+  - Timothy Pearson <tpearson@raptorengineering.com>
+
+description: |
+  The SIE Cronos Platform Controller CPLD is a multi-purpose platform controller
+  that provides both a watchdog timer and an LED controller. As both functions
+  are provided by the same CPLD, a multi-function device is exposed as the
+  parent of both functions.
+
+properties:
+  compatible:
+    const: sie,cronos-cpld
+
+  reg:
+    maxItems: 1
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 1
+
+  leds:
+    type: object
+    description: Cronos Platform Status LEDs
+
+    properties:
+      compatible:
+        const: sie,cronos-leds
+
+  watchdog:
+    type: object
+    description: Cronos Platform Watchdog Timer
+
+    properties:
+      compatible:
+        const: sie,cronos-watchdog
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    cpld: cpld@3f {
+      compatible = "sie,cronos-cpld";
+      reg = <0x3f>;
+
+      watchdog {
+        compatible = "sie,cronos-watchdog";
+      };
+
+      leds {
+        compatible = "sie,cronos-leds";
+      };
+    };
-- 
2.30.2

Re: [PATCH 2/3] dt-bindings: mfd: sie,cronos-cpld: Add initial DT binding

[Rob Herring]

On Mon, 02 Oct 2023 17:32:21 -0500, Shawn Anastasio wrote:
> The SIE Cronos Platform Controller CPLD is a multi-purpose platform
> controller that provides both a watchdog timer and an LED controller. As
> both functions are provided by the same CPLD, a multi-function device is
> exposed as the parent of both functions.
> 
> Add a DT binding for this device.
> 
> Signed-off-by: Shawn Anastasio <sanastasio@raptorengineering.com>
> ---
>  .../bindings/mfd/sie,cronos-cpld.yaml         | 67 +++++++++++++++++++
>  1 file changed, 67 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/sie,cronos-cpld.yaml
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
Documentation/devicetree/bindings/mfd/sie,cronos-cpld.example.dts:20.11-24: Warning (reg_format): /example-0/cpld@3f:reg: property has invalid length (4 bytes) (#address-cells == 1, #size-cells == 1)
Documentation/devicetree/bindings/mfd/sie,cronos-cpld.example.dtb: Warning (pci_device_reg): Failed prerequisite 'reg_format'
Documentation/devicetree/bindings/mfd/sie,cronos-cpld.example.dtb: Warning (pci_device_bus_num): Failed prerequisite 'reg_format'
Documentation/devicetree/bindings/mfd/sie,cronos-cpld.example.dtb: Warning (simple_bus_reg): Failed prerequisite 'reg_format'
Documentation/devicetree/bindings/mfd/sie,cronos-cpld.example.dtb: Warning (i2c_bus_reg): Failed prerequisite 'reg_format'
Documentation/devicetree/bindings/mfd/sie,cronos-cpld.example.dtb: Warning (spi_bus_reg): Failed prerequisite 'reg_format'

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/8b014f8b302f8b41c45c4f6fb114cf18e84a76fa.1696285339.git.sanastasio@raptorengineering.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.

Re: [PATCH 2/3] dt-bindings: mfd: sie,cronos-cpld: Add initial DT binding

[Krzysztof Kozlowski]

On 03/10/2023 00:32, Shawn Anastasio wrote:
> The SIE Cronos Platform Controller CPLD is a multi-purpose platform

What is SIE? Vendor prefix says sony.

What is Cronos?


> controller that provides both a watchdog timer and an LED controller. As
> both functions are provided by the same CPLD, a multi-function device is
> exposed as the parent of both functions.

A nit, subject: drop second/last, redundant "DT binding". The
"dt-bindings" prefix is already stating that these are bindings.

> 
> Add a DT binding for this device.
> 
> Signed-off-by: Shawn Anastasio <sanastasio@raptorengineering.com>

Except that this was clearly no tested...

> ---

...

> +properties:
> +  compatible:
> +    const: sie,cronos-cpld
> +
> +  reg:
> +    maxItems: 1
> +
> +  '#address-cells':
> +    const: 1

Why do you need it?

> +
> +  '#size-cells':
> +    const: 1

Also looks unneeded.

> +
> +  leds:
> +    type: object
> +    description: Cronos Platform Status LEDs

Missing additionalProperties:false... but anyway this is just empty. No
resources? Drop the node.

> +
> +    properties:
> +      compatible:
> +        const: sie,cronos-leds
> +
> +  watchdog:
> +    type: object
> +    description: Cronos Platform Watchdog Timer
> +
> +    properties:
> +      compatible:
> +        const: sie,cronos-watchdog

No resources? Drop the node.

Best regards,
Krzysztof

Re: [PATCH 2/3] dt-bindings: mfd: sie,cronos-cpld: Add initial DT binding

[Shawn Anastasio]

On 10/3/23 4:22 AM, Krzysztof Kozlowski wrote:
> On 03/10/2023 00:32, Shawn Anastasio wrote:
>> The SIE Cronos Platform Controller CPLD is a multi-purpose platform
> 
> What is SIE? Vendor prefix says sony.
>

(Repeated from my response to your reply to patch 1)
Sony Interactive Entertainment is a separate corporate entity and it's
the one that created the hardware to which this driver pertains.

> What is Cronos?
>

Sorry, I'll amend the description to clarify this. Cronos is an x86
server platform developed and deployed by SIE.

> 
>> controller that provides both a watchdog timer and an LED controller. As
>> both functions are provided by the same CPLD, a multi-function device is
>> exposed as the parent of both functions.
> 
> A nit, subject: drop second/last, redundant "DT binding". The
> "dt-bindings" prefix is already stating that these are bindings.
>

Will do.

>>
>> Add a DT binding for this device.
>>
>> Signed-off-by: Shawn Anastasio <sanastasio@raptorengineering.com>
> 
> Except that this was clearly no tested...
> 

My apologies, it seems I didn't have all of the required dependencies
installed locally to enable dt binding validation. Will fix.

>> ---
> 
> ...
> 
>> +properties:
>> +  compatible:
>> +    const: sie,cronos-cpld
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  '#address-cells':
>> +    const: 1
> 
> Why do you need it?
>
>> +
>> +  '#size-cells':
>> +    const: 1
> 
> Also looks unneeded.
>

These were inherited from an existing dt binding in the tree that I used
as a reference. I'll drop them both at your request.

>> +
>> +  leds:
>> +    type: object
>> +    description: Cronos Platform Status LEDs
> 
> Missing additionalProperties:false... but anyway this is just empty. No
> resources? Drop the node.
>

Having nodes for the leds and the watchdog allows the two independent
functions to be enabled/disabled in the device tree by adding/removing
the relevant object. Would it be more idiomatic to instead introduce
properties to the parent sie,cronos-cpld object to toggle these
functions?

>> +
>> +    properties:
>> +      compatible:
>> +        const: sie,cronos-leds
>> +
>> +  watchdog:
>> +    type: object
>> +    description: Cronos Platform Watchdog Timer
>> +
>> +    properties:
>> +      compatible:
>> +        const: sie,cronos-watchdog
> 
> No resources? Drop the node.
> 

Same question as above.

> Best regards,
> Krzysztof

Thanks,
Shawn

Re: [PATCH 2/3] dt-bindings: mfd: sie,cronos-cpld: Add initial DT binding

[Krzysztof Kozlowski]

On 09/10/2023 23:04, Shawn Anastasio wrote:
>>> +
>>> +  leds:
>>> +    type: object
>>> +    description: Cronos Platform Status LEDs
>>
>> Missing additionalProperties:false... but anyway this is just empty. No
>> resources? Drop the node.
>>
> 
> Having nodes for the leds and the watchdog allows the two independent
> functions to be enabled/disabled in the device tree by adding/removing
> the relevant object. Would it be more idiomatic to instead introduce
> properties to the parent sie,cronos-cpld object to toggle these
> functions?

And why DT should be used to enable/disable them? Or are you suggesting
you have different devices under the same compatible?



Best regards,
Krzysztof

[PATCH 3/3] mfd: sie-cronos-cpld: Add driver for SIE cronos CPLD

[Shawn Anastasio]

From: Timothy Pearson <tpearson@raptorengineering.com>

The SIE Cronos Platform Controller CPLD is a multi-purpose platform
controller that provides both a watchdog timer and an LED controller. As
both functions are provided by the same CPLD, a multi-function device is
exposed as the parent of both functions.

Signed-off-by: Timothy Pearson <tpearson@raptorengineering.com>
Signed-off-by: Shawn Anastasio <sanastasio@raptorengineering.com>
---
 MAINTAINERS                              |   7 +
 drivers/mfd/Kconfig                      |  11 +
 drivers/mfd/Makefile                     |   1 +
 drivers/mfd/sie-cronos-cpld.c            | 589 +++++++++++++++++++++++
 include/linux/mfd/sie/cronos/core.h      |  17 +
 include/linux/mfd/sie/cronos/registers.h |  59 +++
 6 files changed, 684 insertions(+)
 create mode 100644 drivers/mfd/sie-cronos-cpld.c
 create mode 100644 include/linux/mfd/sie/cronos/core.h
 create mode 100644 include/linux/mfd/sie/cronos/registers.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 79630b7d946e..1e9c044455f2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -19545,6 +19545,13 @@ F:	drivers/media/mmc/siano/
 F:	drivers/media/usb/siano/
 F:	drivers/media/usb/siano/

+SIE CRONOS CPLD DRIVER
+M:	Georgy Yakovlev <Georgy.Yakovlev@sony.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/mfd/sie,cronos-cpld.yaml
+F:	drivers/mfd/sie-cronos-cpld.c
+F:	include/linux/mfd/sie/cronos/
+
 SIEMENS IPC LED DRIVERS
 M:	Gerd Haeussler <gerd.haeussler.ext@siemens.com>
 M:	Xing Tong Wu <xingtong.wu@siemens.com>
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index aea95745c73f..8312759ce5c9 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -2216,6 +2216,17 @@ config MFD_QCOM_PM8008
 	  under it in the device tree. Additional drivers must be enabled in
 	  order to use the functionality of the device.

+config MFD_SIE_CRONOS_CPLD
+	tristate "SIE Cronos CPLD Support"
+	select MFD_CORE
+	select REGMAP_I2C
+	depends on I2C
+	help
+      Support for the SIE Cronos system control CPLDs. Additional drivers must
+      be enabled in order to use the functionality of the device, including LED
+      control and the system watchdog. The controller itself is a custom design
+      tailored to the specific needs of the SIE Cronos hardware platform.
+
 menu "Multimedia Capabilities Port drivers"
 	depends on ARCH_SA1100

diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index c66f07edcd0e..a580c549e3ab 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -284,3 +284,4 @@ rsmu-i2c-objs			:= rsmu_core.o rsmu_i2c.o
 rsmu-spi-objs			:= rsmu_core.o rsmu_spi.o
 obj-$(CONFIG_MFD_RSMU_I2C)	+= rsmu-i2c.o
 obj-$(CONFIG_MFD_RSMU_SPI)	+= rsmu-spi.o
+obj-$(CONFIG_MFD_SIE_CRONOS_CPLD)	+= sie-cronos-cpld.o
diff --git a/drivers/mfd/sie-cronos-cpld.c b/drivers/mfd/sie-cronos-cpld.c
new file mode 100644
index 000000000000..43fc51e07e7f
--- /dev/null
+++ b/drivers/mfd/sie-cronos-cpld.c
@@ -0,0 +1,589 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * I2C device driver for SIE Cronos CPLDs
+ * Copyright (C) 2015-2017  Dialog Semiconductor
+ * Copyright (C) 2022  Raptor Engineering, LLC
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/regmap.h>
+#include <linux/mfd/core.h>
+#include <linux/i2c.h>
+#include <linux/mfd/sie/cronos/core.h>
+#include <linux/mfd/sie/cronos/registers.h>
+
+static struct resource cronos_wdt_resources[] = {
+};
+
+static struct resource cronos_led_resources[] = {
+};
+
+static const struct mfd_cell cronos_cpld_devs[] = {
+	{
+		.name          = "cronos-watchdog",
+		.num_resources = ARRAY_SIZE(cronos_wdt_resources),
+		.resources     = cronos_wdt_resources,
+		.of_compatible = "sie,cronos-watchdog",
+	},
+	{
+		.name          = "cronos-leds",
+		.id            = 1,
+		.num_resources = ARRAY_SIZE(cronos_led_resources),
+		.resources     = cronos_led_resources,
+		.of_compatible = "sie,cronos-leds",
+	},
+};
+
+static ssize_t payload_power_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	unsigned int payloadpower_val = 0;
+	int ret = -EIO;
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	ret = regmap_read(chip->regmap, CRONOS_CPLD_PAYLOAD_POWER_CTL_REG, &payloadpower_val);
+	if (ret < 0)
+		return ret;
+
+	return snprintf(buf, PAGE_SIZE, "0x%02x\n", payloadpower_val);
+}
+
+static ssize_t payload_power_store(struct device *dev,
+				   struct device_attribute *attr,
+				   const char *buf, size_t len)
+{
+	u8 val = 0;
+	int ret = -EIO;
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	if (kstrtou8(buf, 0, &val))
+		return -EINVAL;
+
+	ret = regmap_write(chip->regmap, CRONOS_CPLD_PAYLOAD_POWER_CTL_REG, val);
+	if (ret) {
+		dev_err(dev, "Failed to write value 0x%02x to address 0x%02x",
+			val, CRONOS_CPLD_PAYLOAD_POWER_CTL_REG);
+		return ret;
+	}
+	return len;
+}
+
+
+static ssize_t bmc_flash_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	unsigned int bmcflash_val = 0;
+	int ret = -EIO;
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	ret = regmap_read(chip->regmap, CRONOS_CPLD_BMC_BOOT_FLASH_SELECT_REG, &bmcflash_val);
+	if (ret < 0)
+		return ret;
+
+	return snprintf(buf, PAGE_SIZE, "0x%02x\n", bmcflash_val);
+}
+
+static ssize_t bmc_flash_store(struct device *dev,
+			       struct device_attribute *attr,
+			       const char *buf, size_t len)
+{
+	u8 val = 0;
+	int ret = -EIO;
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	if (kstrtou8(buf, 0, &val))
+		return -EINVAL;
+
+	ret = regmap_write(chip->regmap, CRONOS_CPLD_BMC_BOOT_FLASH_SELECT_REG, val);
+	if (ret) {
+		dev_err(dev, "Failed to write value 0x%02x to address 0x%02x",
+			val, CRONOS_CPLD_BMC_BOOT_FLASH_SELECT_REG);
+		return ret;
+	}
+	return len;
+}
+
+
+static ssize_t switch_reset_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	unsigned int switchreset_val = 0;
+	int ret = -EIO;
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	ret = regmap_read(chip->regmap, CRONOS_CPLD_SWITCH_RESET_CMD_REG, &switchreset_val);
+	if (ret < 0)
+		return ret;
+
+	return snprintf(buf, PAGE_SIZE, "0x%02x\n", switchreset_val);
+}
+
+static ssize_t switch_reset_store(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf, size_t len)
+{
+	unsigned int switchreset_val = 0;
+	u8 val = -EINVAL;
+	int ret = -EIO;
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	if (kstrtou8(buf, 0, &val))
+		return -EINVAL;
+
+	if (val != 1)
+		return -EINVAL;
+
+	ret = regmap_read(chip->regmap, CRONOS_CPLD_SWITCH_RESET_CMD_REG, &switchreset_val);
+	if (ret < 0)
+		return ret;
+
+	ret = regmap_write(chip->regmap, CRONOS_CPLD_SWITCH_RESET_CMD_REG, switchreset_val);
+	if (ret) {
+		dev_err(dev, "Failed to write value 0x%02x to address 0x%02x",
+				switchreset_val, CRONOS_CPLD_SWITCH_RESET_CMD_REG);
+		return ret;
+	}
+	return len;
+}
+
+
+static ssize_t switch_flash_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	unsigned int switchflash_val = 0;
+	int ret = -EIO;
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	ret = regmap_read(chip->regmap, CRONOS_CPLD_SWITCH_BOOT_FLASH_SELECT_REG, &switchflash_val);
+	if (ret < 0)
+		return ret;
+
+	return snprintf(buf, PAGE_SIZE, "0x%02x\n", switchflash_val);
+}
+
+static ssize_t switch_flash_store(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf, size_t len)
+{
+	u8 val = 0;
+	int ret = -EIO;
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	if (kstrtou8(buf, 0, &val))
+		return -EINVAL;
+
+	ret = regmap_write(chip->regmap, CRONOS_CPLD_SWITCH_BOOT_FLASH_SELECT_REG, val);
+	if (ret) {
+		dev_err(dev, "Failed to write value 0x%02x to address 0x%02x",
+			val, CRONOS_CPLD_SWITCH_BOOT_FLASH_SELECT_REG);
+		return ret;
+	}
+	return len;
+}
+
+
+static ssize_t uart_mux_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	unsigned int uartmux_val = 0;
+	int ret = -EIO;
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	ret = regmap_read(chip->regmap, CRONOS_CPLD_UART_MUX_REG, &uartmux_val);
+	if (ret < 0)
+		return ret;
+
+	return snprintf(buf, PAGE_SIZE, "0x%02x\n", uartmux_val);
+}
+
+static ssize_t uart_mux_store(struct device *dev,
+			      struct device_attribute *attr,
+			      const char *buf, size_t len)
+{
+	u8 val = 0;
+	int ret = -EIO;
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	if (kstrtou8(buf, 0, &val))
+		return -EINVAL;
+
+	ret = regmap_write(chip->regmap, CRONOS_CPLD_UART_MUX_REG, val);
+	if (ret) {
+		dev_err(dev, "Failed to write value 0x%02x to address 0x%02x",
+			val, CRONOS_CPLD_UART_MUX_REG);
+		return ret;
+	}
+	return len;
+}
+
+
+static ssize_t led_get_brightness(struct sie_cronos_cpld *chip, unsigned int reg, char *buf)
+{
+	unsigned int brightness_val;
+	int ret = -EIO;
+
+	ret = regmap_read(chip->regmap, reg, &brightness_val);
+	if (ret != 0)
+		return ret;
+
+	return snprintf(buf, PAGE_SIZE, "0x%02x\n", brightness_val);
+}
+
+static ssize_t led_set_brightness(struct sie_cronos_cpld *chip, unsigned int reg, const char *buf,
+	size_t len)
+{
+	u8 val = 0;
+	int ret = -EIO;
+
+	if (kstrtou8(buf, 0, &val))
+		return -EINVAL;
+
+	ret = regmap_update_bits(chip->regmap, reg, CRONOS_CPLD_LEDS_BRIGHTNESS_SET_MASK, val);
+	if (ret) {
+		dev_err(chip->dev, "Failed to write value 0x%02x to address 0x%02x", val, reg);
+		return ret;
+	}
+	return len;
+}
+
+static ssize_t brightness_red_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	return led_get_brightness(chip, CRONOS_CPLD_BRIGHTNESS_RED_REG, buf);
+}
+
+static ssize_t brightness_red_store(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t len)
+{
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	return led_set_brightness(chip, CRONOS_CPLD_BRIGHTNESS_RED_REG, buf, len);
+}
+
+static ssize_t brightness_green_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	return led_get_brightness(chip, CRONOS_CPLD_BRIGHTNESS_GREEN_REG, buf);
+}
+
+static ssize_t brightness_green_store(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t len)
+{
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	return led_set_brightness(chip, CRONOS_CPLD_BRIGHTNESS_GREEN_REG, buf, len);
+}
+
+static ssize_t brightness_blue_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	return led_get_brightness(chip, CRONOS_CPLD_BRIGHTNESS_BLUE_REG, buf);
+}
+
+static ssize_t brightness_blue_store(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t len)
+{
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	return led_set_brightness(chip, CRONOS_CPLD_BRIGHTNESS_BLUE_REG, buf, len);
+}
+
+
+static ssize_t revision_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	u16 revision = 0;
+	int ret = -EIO;
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	ret = regmap_bulk_read(chip->regmap, CRONOS_CPLD_REVISION_LOW_REG, &revision, 2);
+	if (ret)
+		return -EIO;
+
+	return snprintf(buf, PAGE_SIZE, "0x%04x\n", revision);
+}
+
+static ssize_t device_id_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	u16 device_id = 0;
+	int ret = -EIO;
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	ret = regmap_bulk_read(chip->regmap, CRONOS_CPLD_DEVICE_ID_LOW_REG, &device_id, 2);
+	if (ret)
+		return -EIO;
+
+	return snprintf(buf, PAGE_SIZE, "0x%04x\n", device_id);
+}
+
+static ssize_t bmc_mac_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	u8 bmc_mac[6];
+	int ret = -EIO;
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	ret = regmap_bulk_read(chip->regmap, CRONOS_CPLD_BMC_MAC_LOW_REG, bmc_mac, 6);
+	if (ret)
+		return -EIO;
+
+	return snprintf(buf, PAGE_SIZE, "%pM\n", bmc_mac);
+}
+
+static ssize_t status_2_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	unsigned int last_boot = 0;
+	int ret = -EIO;
+	struct sie_cronos_cpld *chip = dev_get_drvdata(dev);
+
+	ret = regmap_read(chip->regmap, CRONOS_CPLD_STATUS_2_REG, &last_boot);
+	if (ret < 0)
+		return ret;
+
+	return snprintf(buf, PAGE_SIZE, "0x%02x\n", last_boot);
+}
+
+
+static DEVICE_ATTR_RO(revision);
+static DEVICE_ATTR_RO(device_id);
+static DEVICE_ATTR_RO(bmc_mac);
+static DEVICE_ATTR_RO(status_2);
+
+static DEVICE_ATTR_RW(uart_mux);
+static DEVICE_ATTR_RW(switch_flash);
+static DEVICE_ATTR_RW(switch_reset);
+static DEVICE_ATTR_RW(bmc_flash);
+static DEVICE_ATTR_RW(payload_power);
+
+static DEVICE_ATTR_RW(brightness_red);
+static DEVICE_ATTR_RW(brightness_green);
+static DEVICE_ATTR_RW(brightness_blue);
+static struct attribute *cronos_cpld_sysfs_entries[] = {
+	&dev_attr_revision.attr,
+	&dev_attr_device_id.attr,
+	&dev_attr_bmc_mac.attr,
+	&dev_attr_status_2.attr,
+	&dev_attr_uart_mux.attr,
+	&dev_attr_switch_flash.attr,
+	&dev_attr_switch_reset.attr,
+	&dev_attr_bmc_flash.attr,
+	&dev_attr_payload_power.attr,
+	&dev_attr_brightness_red.attr,
+	&dev_attr_brightness_green.attr,
+	&dev_attr_brightness_blue.attr,
+	NULL,
+};
+
+static const struct attribute_group cronos_cpld_attr_group = {
+	.attrs	= cronos_cpld_sysfs_entries,
+};
+
+static int sie_cronos_get_device_type(struct sie_cronos_cpld *chip)
+{
+	int device_id;
+	int byte;
+	int ret;
+
+	ret = regmap_read(chip->regmap, CRONOS_CPLD_DEVICE_ID_HIGH_REG, &byte);
+	if (ret < 0) {
+		dev_err(chip->dev, "Cannot read chip ID.\n");
+		return -EIO;
+	}
+	device_id = byte << 8;
+	ret = regmap_read(chip->regmap, CRONOS_CPLD_DEVICE_ID_LOW_REG, &byte);
+	if (ret < 0) {
+		dev_err(chip->dev, "Cannot read chip ID.\n");
+		return -EIO;
+	}
+	device_id |= byte;
+	if (device_id != CRONOS_CPLD_DEVICE_ID) {
+		dev_err(chip->dev, "Invalid device ID: 0x%04x\n", device_id);
+		return -ENODEV;
+	}
+
+	dev_info(chip->dev,
+		 "Device detected (device-ID: 0x%04X)\n",
+		 device_id);
+
+	return ret;
+}
+
+static bool cronos_cpld_is_writeable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case CRONOS_CPLD_BRIGHTNESS_RED_REG:
+	case CRONOS_CPLD_BRIGHTNESS_GREEN_REG:
+	case CRONOS_CPLD_BRIGHTNESS_BLUE_REG:
+	case CRONOS_LEDS_SMC_STATUS_REG:
+	case CRONOS_LEDS_SWITCH_STATUS_REG:
+	case CRONOS_LEDS_CCM1_STATUS_REG:
+	case CRONOS_LEDS_CCM2_STATUS_REG:
+	case CRONOS_LEDS_CCM3_STATUS_REG:
+	case CRONOS_LEDS_CCM4_STATUS_REG:
+	case CRONOS_LEDS_CCM_POWER_REG:
+
+	case CRONOS_WDT_CTL_REG:
+	case CRONOS_WDT_CLR_REG:
+
+	case CRONOS_CPLD_UART_MUX_REG:
+	case CRONOS_CPLD_SWITCH_BOOT_FLASH_SELECT_REG:
+	case CRONOS_CPLD_SWITCH_RESET_CMD_REG:
+	case CRONOS_CPLD_BMC_BOOT_FLASH_SELECT_REG:
+	case CRONOS_CPLD_PAYLOAD_POWER_CTL_REG:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool cronos_cpld_is_readable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case CRONOS_CPLD_REVISION_HIGH_REG:
+	case CRONOS_CPLD_REVISION_LOW_REG:
+	case CRONOS_CPLD_DEVICE_ID_HIGH_REG:
+	case CRONOS_CPLD_DEVICE_ID_LOW_REG:
+
+	case CRONOS_CPLD_BRIGHTNESS_RED_REG:
+	case CRONOS_CPLD_BRIGHTNESS_GREEN_REG:
+	case CRONOS_CPLD_BRIGHTNESS_BLUE_REG:
+	case CRONOS_LEDS_SMC_STATUS_REG:
+	case CRONOS_LEDS_SWITCH_STATUS_REG:
+	case CRONOS_LEDS_CCM1_STATUS_REG:
+	case CRONOS_LEDS_CCM2_STATUS_REG:
+	case CRONOS_LEDS_CCM3_STATUS_REG:
+	case CRONOS_LEDS_CCM4_STATUS_REG:
+	case CRONOS_LEDS_CCM_POWER_REG:
+
+	case CRONOS_WDT_CTL_REG:
+	case CRONOS_WDT_CLR_REG:
+
+	case CRONOS_CPLD_STATUS_2_REG:
+	case CRONOS_CPLD_UART_MUX_REG:
+	case CRONOS_CPLD_SWITCH_BOOT_FLASH_SELECT_REG:
+	case CRONOS_CPLD_SWITCH_RESET_CMD_REG:
+	case CRONOS_CPLD_BMC_BOOT_FLASH_SELECT_REG:
+	case CRONOS_CPLD_PAYLOAD_POWER_CTL_REG:
+
+	case CRONOS_CPLD_BMC_MAC_LOW_REG ... CRONOS_CPLD_BMC_MAC_HIGH_REG:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool cronos_cpld_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case CRONOS_CPLD_REVISION_HIGH_REG:
+	case CRONOS_CPLD_REVISION_LOW_REG:
+
+	case CRONOS_CPLD_SWITCH_BOOT_FLASH_SELECT_REG:
+	case CRONOS_CPLD_SWITCH_RESET_CMD_REG:
+	case CRONOS_CPLD_BMC_BOOT_FLASH_SELECT_REG:
+	case CRONOS_CPLD_PAYLOAD_POWER_CTL_REG:
+
+	case CRONOS_WDT_CTL_REG:
+	case CRONOS_WDT_CLR_REG:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static struct regmap_config cronos_cpld_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = CRONOS_CPLD_REVISION_HIGH_REG,
+	.writeable_reg = cronos_cpld_is_writeable_reg,
+	.readable_reg = cronos_cpld_is_readable_reg,
+	.volatile_reg = cronos_cpld_is_volatile_reg,
+	.use_single_read = true,
+	.use_single_write = true,
+	.cache_type = REGCACHE_RBTREE,
+};
+
+static const struct of_device_id cronos_cpld_dt_ids[] = {
+	{ .compatible = "sie,cronos-cpld", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, cronos_cpld_dt_ids);
+
+static int sie_cronos_i2c_probe(struct i2c_client *i2c)
+{
+	struct sie_cronos_cpld *chip;
+	const struct of_device_id *match;
+	const struct mfd_cell *cell;
+	const struct regmap_config *config;
+	int cell_num;
+	int ret;
+
+	chip = devm_kzalloc(&i2c->dev, sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	if (i2c->dev.of_node) {
+		match = of_match_node(cronos_cpld_dt_ids, i2c->dev.of_node);
+		if (!match)
+			return -EINVAL;
+	}
+
+	i2c_set_clientdata(i2c, chip);
+	chip->dev = &i2c->dev;
+
+	cell = cronos_cpld_devs;
+	cell_num = ARRAY_SIZE(cronos_cpld_devs);
+	config = &cronos_cpld_regmap_config;
+
+	chip->regmap = devm_regmap_init_i2c(i2c, config);
+	if (IS_ERR(chip->regmap)) {
+		ret = PTR_ERR(chip->regmap);
+		dev_err(chip->dev, "Failed to allocate register map: %d\n",
+			ret);
+		return ret;
+	}
+
+	ret = sie_cronos_get_device_type(chip);
+	if (ret)
+		return ret;
+
+	ret = mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, cell,
+			      cell_num, NULL, 0, NULL);
+	if (ret) {
+		dev_err(chip->dev, "Cannot register child devices\n");
+		return ret;
+	}
+
+	/* Add sysfs */
+	ret = sysfs_create_group(&chip->dev->kobj, &cronos_cpld_attr_group);
+	if (ret)
+		dev_err(chip->dev, "Failed to create sysfs entries\n");
+
+	return ret;
+}
+
+static void sie_cronos_i2c_remove(struct i2c_client *i2c)
+{
+	struct sie_cronos_cpld *chip = i2c_get_clientdata(i2c);
+
+	sysfs_remove_group(&chip->dev->kobj, &cronos_cpld_attr_group);
+	mfd_remove_devices(chip->dev);
+}
+
+static struct i2c_driver sie_cronos_i2c_driver = {
+	.driver = {
+		.name = "sie-cronos",
+		.of_match_table = of_match_ptr(cronos_cpld_dt_ids),
+	},
+	.probe    = sie_cronos_i2c_probe,
+	.remove   = sie_cronos_i2c_remove,
+};
+
+module_i2c_driver(sie_cronos_i2c_driver);
+
+MODULE_DESCRIPTION("Core device driver for SIE Cronos CPLDs");
+MODULE_AUTHOR("Raptor Engineering, LLC <support@raptorengineering.com>");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/sie/cronos/core.h b/include/linux/mfd/sie/cronos/core.h
new file mode 100644
index 000000000000..a2fcc48012d8
--- /dev/null
+++ b/include/linux/mfd/sie/cronos/core.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2015-2017  Dialog Semiconductor
+ * Copyright (C) 2022  Raptor Engineering, LLC
+ */
+
+#ifndef __MFD_SIE_CRONOS_CORE_H__
+#define __MFD_SIE_CRONOS_CORE_H__
+
+#include <linux/mfd/sie/cronos/registers.h>
+
+struct sie_cronos_cpld {
+	struct device *dev;
+	struct regmap *regmap;
+};
+
+#endif /* __MFD_SIE_CRONOS_H__ */
diff --git a/include/linux/mfd/sie/cronos/registers.h b/include/linux/mfd/sie/cronos/registers.h
new file mode 100644
index 000000000000..e70f5ec038cc
--- /dev/null
+++ b/include/linux/mfd/sie/cronos/registers.h
@@ -0,0 +1,59 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2015-2017  Dialog Semiconductor
+ * Copyright (C) 2022  Raptor Engineering, LLC
+ */
+
+#ifndef __SIE_CRONOS_H__
+#define __SIE_CRONOS_H__
+
+#define CRONOS_CPLD_DEVICE_ID		0x0134
+
+/*
+ * Registers and control masks / values
+ */
+
+#define CRONOS_CPLD_REVISION_HIGH_REG			0x73
+#define CRONOS_CPLD_REVISION_LOW_REG			0x72
+#define CRONOS_CPLD_DEVICE_ID_HIGH_REG			0x71
+#define CRONOS_CPLD_DEVICE_ID_LOW_REG			0x70
+
+#define CRONOS_CPLD_BRIGHTNESS_RED_REG			0x17
+#define CRONOS_CPLD_BRIGHTNESS_GREEN_REG		0x18
+#define CRONOS_CPLD_BRIGHTNESS_BLUE_REG			0x19
+
+#define CRONOS_CPLD_LEDS_BRIGHTNESS_SET_MASK		0x7F
+#define CRONOS_LEDS_MAX_BRIGHTNESS			0x7F
+
+#define CRONOS_LEDS_SMC_STATUS_REG			0x10
+#define CRONOS_LEDS_SWITCH_STATUS_REG			0x11
+
+#define CRONOS_LEDS_CCM1_STATUS_REG			0x15
+#define CRONOS_LEDS_CCM2_STATUS_REG			0x13
+#define CRONOS_LEDS_CCM3_STATUS_REG			0x12
+#define CRONOS_LEDS_CCM4_STATUS_REG			0x14
+
+#define CRONOS_LEDS_CCM_POWER_REG			0x16
+
+#define CRONOS_CPLD_UART_MUX_REG			0x0e
+#define CRONOS_CPLD_SWITCH_BOOT_FLASH_SELECT_REG	0x00
+#define CRONOS_CPLD_SWITCH_RESET_CMD_REG		0x01
+#define CRONOS_CPLD_BMC_BOOT_FLASH_SELECT_REG		0x02
+#define CRONOS_CPLD_PAYLOAD_POWER_CTL_REG		0x0a
+#define CRONOS_CPLD_BMC_MAC_LOW_REG			0x30
+#define CRONOS_CPLD_BMC_MAC_HIGH_REG			0x35
+
+#define CRONOS_WDT_CLR_REG		0x03
+#define CRONOS_WDT_CTL_REG		0x0c
+
+#define CRONOS_CPLD_STATUS_2_REG	0x05
+
+#define CRONOS_WDT_CLR_VAL		0xc3
+#define CRONOS_WDT_ENABLE_MASK		0x80
+#define CRONOS_WDT_ENABLE_VAL		0x80
+#define CRONOS_WDT_DISABLE_VAL		0x00
+#define CRONOS_WDT_TIMEOUT_MASK		0x07
+#define CRONOS_WDT_CTL_RESET_VAL	0x00
+
+
+#endif /* __SIE_CRONOS_H__ */
--
2.30.2

Re: [PATCH 3/3] mfd: sie-cronos-cpld: Add driver for SIE cronos CPLD

[kernel test robot]

Hi Shawn,

kernel test robot noticed the following build warnings:

[auto build test WARNING on lee-mfd/for-mfd-next]
[also build test WARNING on robh/for-next linus/master v6.6-rc4 next-20231004]
[cannot apply to lee-leds/for-leds-next lee-mfd/for-mfd-fixes]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Shawn-Anastasio/dt-bindings-mfd-sie-cronos-cpld-Add-initial-DT-binding/20231003-073243
base:   https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next
patch link:    https://lore.kernel.org/r/2e9763cb4fa258fe11769a4ff1544d96c536a4a2.1696285339.git.sanastasio%40raptorengineering.com
patch subject: [PATCH 3/3] mfd: sie-cronos-cpld: Add driver for SIE cronos CPLD
config: i386-randconfig-063-20231005 (https://download.01.org/0day-ci/archive/20231005/202310050807.eDZkgFy5-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231005/202310050807.eDZkgFy5-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202310050807.eDZkgFy5-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/mfd/sie-cronos-cpld.c:509:34: warning: 'cronos_cpld_dt_ids' defined but not used [-Wunused-const-variable=]
     509 | static const struct of_device_id cronos_cpld_dt_ids[] = {
         |                                  ^~~~~~~~~~~~~~~~~~


vim +/cronos_cpld_dt_ids +509 drivers/mfd/sie-cronos-cpld.c

   508	
 > 509	static const struct of_device_id cronos_cpld_dt_ids[] = {
   510		{ .compatible = "sie,cronos-cpld", },
   511		{ }
   512	};
   513	MODULE_DEVICE_TABLE(of, cronos_cpld_dt_ids);
   514	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH 3/3] mfd: sie-cronos-cpld: Add driver for SIE cronos CPLD

[Lee Jones]

On Thu, 05 Oct 2023, kernel test robot wrote:

> Hi Shawn,
> 
> kernel test robot noticed the following build warnings:
> 
> [auto build test WARNING on lee-mfd/for-mfd-next]
> [also build test WARNING on robh/for-next linus/master v6.6-rc4 next-20231004]
> [cannot apply to lee-leds/for-leds-next lee-mfd/for-mfd-fixes]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Shawn-Anastasio/dt-bindings-mfd-sie-cronos-cpld-Add-initial-DT-binding/20231003-073243
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next
> patch link:    https://lore.kernel.org/r/2e9763cb4fa258fe11769a4ff1544d96c536a4a2.1696285339.git.sanastasio%40raptorengineering.com
> patch subject: [PATCH 3/3] mfd: sie-cronos-cpld: Add driver for SIE cronos CPLD
> config: i386-randconfig-063-20231005 (https://download.01.org/0day-ci/archive/20231005/202310050807.eDZkgFy5-lkp@intel.com/config)
> compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231005/202310050807.eDZkgFy5-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202310050807.eDZkgFy5-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>):
> 
> >> drivers/mfd/sie-cronos-cpld.c:509:34: warning: 'cronos_cpld_dt_ids' defined but not used [-Wunused-const-variable=]
>      509 | static const struct of_device_id cronos_cpld_dt_ids[] = {
>          |                                  ^~~~~~~~~~~~~~~~~~
> 
> 
> vim +/cronos_cpld_dt_ids +509 drivers/mfd/sie-cronos-cpld.c
> 
>    508	
>  > 509	static const struct of_device_id cronos_cpld_dt_ids[] = {
>    510		{ .compatible = "sie,cronos-cpld", },
>    511		{ }
>    512	};
>    513	MODULE_DEVICE_TABLE(of, cronos_cpld_dt_ids);
>    514	
> 
> -- 
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki

Removing from my queue until this is fixed.

-- 
Lee Jones [李琼斯]