mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![Enrico Weigelt](/assets/img/avatar_default.png)
Define pr_fmt() macro for prefixing the module name to all pr_*() outputs, in order to increase log message clarity. Signed-off-by: Enrico Weigelt <info@metux.net> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
213 lines
6 KiB
C
213 lines
6 KiB
C
/*
|
|
* drivers/leds/leds-apu.c
|
|
* Copyright (C) 2017 Alan Mizrahi, alan at mizrahi dot com dot ve
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the names of the copyright holders nor the names of its
|
|
* contributors may be used to endorse or promote products derived from
|
|
* this software without specific prior written permission.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
|
* Software Foundation.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/dmi.h>
|
|
#include <linux/err.h>
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/leds.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#define APU1_FCH_ACPI_MMIO_BASE 0xFED80000
|
|
#define APU1_FCH_GPIO_BASE (APU1_FCH_ACPI_MMIO_BASE + 0x01BD)
|
|
#define APU1_LEDON 0x08
|
|
#define APU1_LEDOFF 0xC8
|
|
#define APU1_NUM_GPIO 3
|
|
#define APU1_IOSIZE sizeof(u8)
|
|
|
|
/* LED access parameters */
|
|
struct apu_param {
|
|
void __iomem *addr; /* for ioread/iowrite */
|
|
};
|
|
|
|
/* LED private data */
|
|
struct apu_led_priv {
|
|
struct led_classdev cdev;
|
|
struct apu_param param;
|
|
};
|
|
#define cdev_to_priv(c) container_of(c, struct apu_led_priv, cdev)
|
|
|
|
/* LED profile */
|
|
struct apu_led_profile {
|
|
const char *name;
|
|
enum led_brightness brightness;
|
|
unsigned long offset; /* for devm_ioremap */
|
|
};
|
|
|
|
struct apu_led_pdata {
|
|
struct platform_device *pdev;
|
|
struct apu_led_priv *pled;
|
|
spinlock_t lock;
|
|
};
|
|
|
|
static struct apu_led_pdata *apu_led;
|
|
|
|
static const struct apu_led_profile apu1_led_profile[] = {
|
|
{ "apu:green:1", LED_ON, APU1_FCH_GPIO_BASE + 0 * APU1_IOSIZE },
|
|
{ "apu:green:2", LED_OFF, APU1_FCH_GPIO_BASE + 1 * APU1_IOSIZE },
|
|
{ "apu:green:3", LED_OFF, APU1_FCH_GPIO_BASE + 2 * APU1_IOSIZE },
|
|
};
|
|
|
|
static const struct dmi_system_id apu_led_dmi_table[] __initconst = {
|
|
{
|
|
.ident = "apu",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "APU")
|
|
}
|
|
},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(dmi, apu_led_dmi_table);
|
|
|
|
static void apu1_led_brightness_set(struct led_classdev *led, enum led_brightness value)
|
|
{
|
|
struct apu_led_priv *pled = cdev_to_priv(led);
|
|
|
|
spin_lock(&apu_led->lock);
|
|
iowrite8(value ? APU1_LEDON : APU1_LEDOFF, pled->param.addr);
|
|
spin_unlock(&apu_led->lock);
|
|
}
|
|
|
|
static int apu_led_config(struct device *dev, struct apu_led_pdata *apuld)
|
|
{
|
|
int i;
|
|
int err;
|
|
|
|
apu_led->pled = devm_kcalloc(dev,
|
|
ARRAY_SIZE(apu1_led_profile), sizeof(struct apu_led_priv),
|
|
GFP_KERNEL);
|
|
|
|
if (!apu_led->pled)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(apu1_led_profile); i++) {
|
|
struct apu_led_priv *pled = &apu_led->pled[i];
|
|
struct led_classdev *led_cdev = &pled->cdev;
|
|
|
|
led_cdev->name = apu1_led_profile[i].name;
|
|
led_cdev->brightness = apu1_led_profile[i].brightness;
|
|
led_cdev->max_brightness = 1;
|
|
led_cdev->flags = LED_CORE_SUSPENDRESUME;
|
|
led_cdev->brightness_set = apu1_led_brightness_set;
|
|
|
|
pled->param.addr = devm_ioremap(dev,
|
|
apu1_led_profile[i].offset, APU1_IOSIZE);
|
|
if (!pled->param.addr) {
|
|
err = -ENOMEM;
|
|
goto error;
|
|
}
|
|
|
|
err = led_classdev_register(dev, led_cdev);
|
|
if (err)
|
|
goto error;
|
|
|
|
apu1_led_brightness_set(led_cdev, apu1_led_profile[i].brightness);
|
|
}
|
|
|
|
return 0;
|
|
|
|
error:
|
|
while (i-- > 0)
|
|
led_classdev_unregister(&apu_led->pled[i].cdev);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int __init apu_led_probe(struct platform_device *pdev)
|
|
{
|
|
apu_led = devm_kzalloc(&pdev->dev, sizeof(*apu_led), GFP_KERNEL);
|
|
|
|
if (!apu_led)
|
|
return -ENOMEM;
|
|
|
|
apu_led->pdev = pdev;
|
|
|
|
spin_lock_init(&apu_led->lock);
|
|
return apu_led_config(&pdev->dev, apu_led);
|
|
}
|
|
|
|
static struct platform_driver apu_led_driver = {
|
|
.driver = {
|
|
.name = KBUILD_MODNAME,
|
|
},
|
|
};
|
|
|
|
static int __init apu_led_init(void)
|
|
{
|
|
struct platform_device *pdev;
|
|
int err;
|
|
|
|
if (!(dmi_match(DMI_SYS_VENDOR, "PC Engines") &&
|
|
dmi_match(DMI_PRODUCT_NAME, "APU"))) {
|
|
pr_err("No PC Engines APUv1 board detected. For APUv2,3 support, enable CONFIG_PCENGINES_APU2\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
|
|
if (IS_ERR(pdev)) {
|
|
pr_err("Device allocation failed\n");
|
|
return PTR_ERR(pdev);
|
|
}
|
|
|
|
err = platform_driver_probe(&apu_led_driver, apu_led_probe);
|
|
if (err) {
|
|
pr_err("Probe platform driver failed\n");
|
|
platform_device_unregister(pdev);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __exit apu_led_exit(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(apu1_led_profile); i++)
|
|
led_classdev_unregister(&apu_led->pled[i].cdev);
|
|
|
|
platform_device_unregister(apu_led->pdev);
|
|
platform_driver_unregister(&apu_led_driver);
|
|
}
|
|
|
|
module_init(apu_led_init);
|
|
module_exit(apu_led_exit);
|
|
|
|
MODULE_AUTHOR("Alan Mizrahi");
|
|
MODULE_DESCRIPTION("PC Engines APU1 front LED driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("platform:leds_apu");
|