linux-next: manual merge of the thermal tree with the pm tree

* linux-next: manual merge of the thermal tree with the pm tree
@ 2014-10-10  1:10 Stephen Rothwell
  2014-10-10  8:40 ` Zhang Rui
  0 siblings, 1 reply; 24+ messages in thread
From: Stephen Rothwell @ 2014-10-10  1:10 UTC (permalink / raw)
  To: Zhang Rui, Rafael J. Wysocki
  Cc: linux-next, linux-kernel, Sudip Mukherjee, Aaron Lu

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Hi Zhang,

Today's linux-next merge of the thermal tree got a conflict in
drivers/acpi/fan.c between commit 88989fd26a74 ("ACPI / fan: printk
replacement") from the pm tree and commits 71532a58d2b0 ("ACPI / fan:
remove unused macro") and ff39c76855e8 ("ACPI / fan: convert to
platform driver") from the thermal tree.

I fixed it up (see below) and can carry the fix as necessary (no action
is required).

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au

diff --cc drivers/acpi/fan.c
index 5328b1090e08,e007c4987bea..000000000000

--- a/drivers/acpi/fan.c
+++ b/drivers/acpi/fan.c
@@@ -27,15 -27,11 +27,11 @@@
  #include <linux/module.h>
  #include <linux/init.h>
  #include <linux/types.h>
 -#include <asm/uaccess.h>
 +#include <linux/uaccess.h>
  #include <linux/thermal.h>
  #include <linux/acpi.h>
- 
- #define ACPI_FAN_CLASS			"fan"
- #define ACPI_FAN_FILE_STATE		"state"
- 
- #define _COMPONENT		ACPI_FAN_COMPONENT
- ACPI_MODULE_NAME("fan");
+ #include <linux/platform_device.h>
+ #include <linux/sort.h>
  
  MODULE_AUTHOR("Paul Diefenbaugh");
  MODULE_DESCRIPTION("ACPI Fan Driver");
@@@ -125,25 -221,128 +221,129 @@@ static const struct thermal_cooling_dev
  };
  
  /* --------------------------------------------------------------------------
 -                                 Driver Interface
 -   -------------------------------------------------------------------------- */
 + *                               Driver Interface
 + * --------------------------------------------------------------------------
 +*/
  
- static int acpi_fan_add(struct acpi_device *device)
+ static bool acpi_fan_is_acpi4(struct acpi_device *device)
  {
- 	int result = 0;
- 	struct thermal_cooling_device *cdev;
+ 	return acpi_has_method(device->handle, "_FIF") &&
+ 	       acpi_has_method(device->handle, "_FPS") &&
+ 	       acpi_has_method(device->handle, "_FSL") &&
+ 	       acpi_has_method(device->handle, "_FST");
+ }
  
- 	if (!device)
- 		return -EINVAL;
+ static int acpi_fan_get_fif(struct acpi_device *device)
+ {
+ 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ 	struct acpi_fan *fan = acpi_driver_data(device);
+ 	struct acpi_buffer format = { sizeof("NNNN"), "NNNN" };
+ 	struct acpi_buffer fif = { sizeof(fan->fif), &fan->fif };
+ 	union acpi_object *obj;
+ 	acpi_status status;
+ 
+ 	status = acpi_evaluate_object(device->handle, "_FIF", NULL, &buffer);
+ 	if (ACPI_FAILURE(status))
+ 		return status;
+ 
+ 	obj = buffer.pointer;
+ 	if (!obj || obj->type != ACPI_TYPE_PACKAGE) {
+ 		dev_err(&device->dev, "Invalid _FIF data\n");
+ 		status = -EINVAL;
+ 		goto err;
+ 	}
  
- 	strcpy(acpi_device_name(device), "Fan");
- 	strcpy(acpi_device_class(device), ACPI_FAN_CLASS);
+ 	status = acpi_extract_package(obj, &format, &fif);
+ 	if (ACPI_FAILURE(status)) {
+ 		dev_err(&device->dev, "Invalid _FIF element\n");
+ 		status = -EINVAL;
+ 	}
  
- 	result = acpi_bus_update_power(device->handle, NULL);
- 	if (result) {
- 		dev_err(&device->dev, "Setting initial power state\n");
- 		goto end;
+ err:
+ 	kfree(obj);
+ 	return status;
+ }
+ 
+ static int acpi_fan_speed_cmp(const void *a, const void *b)
+ {
+ 	const struct acpi_fan_fps *fps1 = a;
+ 	const struct acpi_fan_fps *fps2 = b;
+ 	return fps1->speed - fps2->speed;
+ }
+ 
+ static int acpi_fan_get_fps(struct acpi_device *device)
+ {
+ 	struct acpi_fan *fan = acpi_driver_data(device);
+ 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ 	union acpi_object *obj;
+ 	acpi_status status;
+ 	int i;
+ 
+ 	status = acpi_evaluate_object(device->handle, "_FPS", NULL, &buffer);
+ 	if (ACPI_FAILURE(status))
+ 		return status;
+ 
+ 	obj = buffer.pointer;
+ 	if (!obj || obj->type != ACPI_TYPE_PACKAGE || obj->package.count < 2) {
+ 		dev_err(&device->dev, "Invalid _FPS data\n");
+ 		status = -EINVAL;
+ 		goto err;
+ 	}
+ 
+ 	fan->fps_count = obj->package.count - 1; /* minus revision field */
+ 	fan->fps = devm_kzalloc(&device->dev,
+ 				fan->fps_count * sizeof(struct acpi_fan_fps),
+ 				GFP_KERNEL);
+ 	if (!fan->fps) {
+ 		dev_err(&device->dev, "Not enough memory\n");
+ 		status = -ENOMEM;
+ 		goto err;
+ 	}
+ 	for (i = 0; i < fan->fps_count; i++) {
+ 		struct acpi_buffer format = { sizeof("NNNNN"), "NNNNN" };
+ 		struct acpi_buffer fps = { sizeof(fan->fps[i]), &fan->fps[i] };
+ 		status = acpi_extract_package(&obj->package.elements[i + 1],
+ 					      &format, &fps);
+ 		if (ACPI_FAILURE(status)) {
+ 			dev_err(&device->dev, "Invalid _FPS element\n");
+ 			break;
+ 		}
+ 	}
+ 
+ 	/* sort the state array according to fan speed in increase order */
+ 	sort(fan->fps, fan->fps_count, sizeof(*fan->fps),
+ 	     acpi_fan_speed_cmp, NULL);
+ 
+ err:
+ 	kfree(obj);
+ 	return status;
+ }
+ 
+ static int acpi_fan_probe(struct platform_device *pdev)
+ {
+ 	int result = 0;
+ 	struct thermal_cooling_device *cdev;
+ 	struct acpi_fan *fan;
+ 	struct acpi_device *device = ACPI_COMPANION(&pdev->dev);
+ 
+ 	fan = devm_kzalloc(&pdev->dev, sizeof(*fan), GFP_KERNEL);
+ 	if (!fan) {
+ 		dev_err(&device->dev, "No memory for fan\n");
+ 		return -ENOMEM;
+ 	}
+ 	device->driver_data = fan;
+ 	platform_set_drvdata(pdev, fan);
+ 
+ 	if (acpi_fan_is_acpi4(device)) {
+ 		if (acpi_fan_get_fif(device) || acpi_fan_get_fps(device))
+ 			goto end;
+ 		fan->acpi4 = true;
+ 	} else {
+ 		result = acpi_device_update_power(device, NULL);
+ 		if (result) {
+ 			dev_err(&device->dev, "Setting initial power state\n");
+ 			goto end;
+ 		}
  	}
  
  	cdev = thermal_cooling_device_register("Fan", device,

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