leds: Add driver for PC Engines APU/APU2 LEDs
This patch implements the driver to support the front panel LEDs for PC Engines APU and APU2 boards. Signed-off-by: Alan Mizrahi <alan@mizrahi.com.ve> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
This commit is contained in:
Alan Mizrahi
Jacek Anaszewski
parent
f2ea85d760
commit
3faee9423c
@ -57,6 +57,16 @@ config LEDS_AAT1290
|
||||
depends on PINCTRL
|
||||
help
|
||||
This option enables support for the LEDs on the AAT1290.
|
||||
config LEDS_APU
|
||||
tristate "Front panel LED support for PC Engines APU/APU2 boards"
|
||||
depends on LEDS_CLASS
|
||||
depends on X86 && DMI
|
||||
help
|
||||
This driver makes the PC Engines APU/APU2 front panel LEDs
|
||||
accessible from userspace programs through the LED subsystem.
|
||||
|
||||
To compile this driver as a module, choose M here: the
|
||||
module will be called leds-apu.
|
||||
|
||||
config LEDS_AS3645A
|
||||
tristate "AS3645A LED flash controller support"
|
||||
|
||||
@ -8,6 +8,7 @@ obj-$(CONFIG_LEDS_TRIGGERS) += led-triggers.o
|
||||
# LED Platform Drivers
|
||||
obj-$(CONFIG_LEDS_88PM860X) += leds-88pm860x.o
|
||||
obj-$(CONFIG_LEDS_AAT1290) += leds-aat1290.o
|
||||
obj-$(CONFIG_LEDS_APU) += leds-apu.o
|
||||
obj-$(CONFIG_LEDS_AS3645A) += leds-as3645a.o
|
||||
obj-$(CONFIG_LEDS_BCM6328) += leds-bcm6328.o
|
||||
obj-$(CONFIG_LEDS_BCM6358) += leds-bcm6358.o
|
||||
|
||||
278
drivers/leds/leds-apu.c
Normal file
278
drivers/leds/leds-apu.c
Normal file
@ -0,0 +1,278 @@
|
||||
/*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#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)
|
||||
|
||||
#define APU2_FCH_ACPI_MMIO_BASE 0xFED80000
|
||||
#define APU2_FCH_GPIO_BASE (APU2_FCH_ACPI_MMIO_BASE + 0x1500)
|
||||
#define APU2_GPIO_BIT_WRITE 22
|
||||
#define APU2_APU2_NUM_GPIO 4
|
||||
#define APU2_IOSIZE sizeof(u32)
|
||||
|
||||
/* 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 */
|
||||
};
|
||||
|
||||
/* Supported platform types */
|
||||
enum apu_led_platform_types {
|
||||
APU1_LED_PLATFORM,
|
||||
APU2_LED_PLATFORM,
|
||||
};
|
||||
|
||||
struct apu_led_pdata {
|
||||
struct platform_device *pdev;
|
||||
struct apu_led_priv *pled;
|
||||
const struct apu_led_profile *profile;
|
||||
enum apu_led_platform_types platform;
|
||||
int num_led_instances;
|
||||
int iosize; /* for devm_ioremap() */
|
||||
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 apu_led_profile apu2_led_profile[] = {
|
||||
{ "apu2:green:1", LED_ON, APU2_FCH_GPIO_BASE + 68 * APU2_IOSIZE },
|
||||
{ "apu2:green:2", LED_OFF, APU2_FCH_GPIO_BASE + 69 * APU2_IOSIZE },
|
||||
{ "apu2:green:3", LED_OFF, APU2_FCH_GPIO_BASE + 70 * APU2_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")
|
||||
}
|
||||
},
|
||||
{
|
||||
.ident = "apu2",
|
||||
.matches = {
|
||||
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
|
||||
DMI_MATCH(DMI_BOARD_NAME, "APU2")
|
||||
}
|
||||
},
|
||||
{}
|
||||
};
|
||||
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 void apu2_led_brightness_set(struct led_classdev *led, enum led_brightness value)
|
||||
{
|
||||
struct apu_led_priv *pled = cdev_to_priv(led);
|
||||
u32 value_new;
|
||||
|
||||
spin_lock(&apu_led->lock);
|
||||
|
||||
value_new = ioread32(pled->param.addr);
|
||||
|
||||
if (value)
|
||||
value_new &= ~BIT(APU2_GPIO_BIT_WRITE);
|
||||
else
|
||||
value_new |= BIT(APU2_GPIO_BIT_WRITE);
|
||||
|
||||
iowrite32(value_new, 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_kzalloc(dev,
|
||||
sizeof(struct apu_led_priv) * apu_led->num_led_instances,
|
||||
GFP_KERNEL);
|
||||
|
||||
if (!apu_led->pled)
|
||||
return -ENOMEM;
|
||||
|
||||
for (i = 0; i < apu_led->num_led_instances; i++) {
|
||||
struct apu_led_priv *pled = &apu_led->pled[i];
|
||||
struct led_classdev *led_cdev = &pled->cdev;
|
||||
|
||||
led_cdev->name = apu_led->profile[i].name;
|
||||
led_cdev->brightness = apu_led->profile[i].brightness;
|
||||
led_cdev->max_brightness = 1;
|
||||
led_cdev->flags = LED_CORE_SUSPENDRESUME;
|
||||
if (apu_led->platform == APU1_LED_PLATFORM)
|
||||
led_cdev->brightness_set = apu1_led_brightness_set;
|
||||
else if (apu_led->platform == APU2_LED_PLATFORM)
|
||||
led_cdev->brightness_set = apu2_led_brightness_set;
|
||||
|
||||
pled->param.addr = devm_ioremap(dev,
|
||||
apu_led->profile[i].offset, apu_led->iosize);
|
||||
if (!pled->param.addr) {
|
||||
err = -ENOMEM;
|
||||
goto error;
|
||||
}
|
||||
|
||||
err = led_classdev_register(dev, led_cdev);
|
||||
if (err)
|
||||
goto error;
|
||||
|
||||
led_cdev->brightness_set(led_cdev, apu_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;
|
||||
|
||||
if (dmi_match(DMI_BOARD_NAME, "APU")) {
|
||||
apu_led->profile = apu1_led_profile;
|
||||
apu_led->platform = APU1_LED_PLATFORM;
|
||||
apu_led->num_led_instances = ARRAY_SIZE(apu1_led_profile);
|
||||
apu_led->iosize = APU1_IOSIZE;
|
||||
} else if (dmi_match(DMI_BOARD_NAME, "APU2")) {
|
||||
apu_led->profile = apu2_led_profile;
|
||||
apu_led->platform = APU2_LED_PLATFORM;
|
||||
apu_led->num_led_instances = ARRAY_SIZE(apu2_led_profile);
|
||||
apu_led->iosize = APU2_IOSIZE;
|
||||
}
|
||||
|
||||
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")) {
|
||||
pr_err("No PC Engines board detected\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
if (!(dmi_match(DMI_PRODUCT_NAME, "APU") || dmi_match(DMI_PRODUCT_NAME, "APU2"))) {
|
||||
pr_err("Unknown PC Engines board: %s\n",
|
||||
dmi_get_system_info(DMI_PRODUCT_NAME));
|
||||
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 < apu_led->num_led_instances; 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 APU family LED driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_ALIAS("platform:leds_apu");
|
||||
Loading…
Reference in New Issue
Block a user