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Merge tag 'leds_for_4.15rc1' of git://git.kernel.org/pub/scm/linux/ke…
…rnel/git/j.anaszewski/linux-leds Pull LED updates from Jacek Anaszewski: "New LED class driver: - add a driver for PC Engines APU/APU2 LEDs New LED trigger: - add a system activity LED trigger LED core improvements: - replace flags bit shift with BIT() macros Convert timers to use timer_setup() in: - led-core - ledtrig-activity - ledtrig-heartbeat - ledtrig-transient LED class drivers fixes: - lp55xx: fix spelling mistake: 'cound' -> 'could' - tca6507: Remove unnecessary reg check - pca955x: Don't invert requested value in pca955x_gpio_set_value() LED documentation improvements: - update 00-INDEX file" * tag 'leds_for_4.15rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds: leds: Add driver for PC Engines APU/APU2 LEDs leds: lp55xx: fix spelling mistake: 'cound' -> 'could' leds: Convert timers to use timer_setup() Documentation: leds: Update 00-INDEX file leds: tca6507: Remove unnecessary reg check leds: ledtrig-heartbeat: Convert timers to use timer_setup() leds: Replace flags bit shift with BIT() macros leds: pca955x: Don't invert requested value in pca955x_gpio_set_value() leds: ledtrig-activity: Add a system activity LED trigger
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -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"); |
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