diff options
Diffstat (limited to 'drivers/leds')
| -rw-r--r-- | drivers/leds/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/leds/Makefile | 1 | ||||
| -rw-r--r-- | drivers/leds/leds-neo1973-vibrator.c | 181 |
3 files changed, 189 insertions, 1 deletions
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index e7fb7d2fcbf..8f41ae002d1 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -33,7 +33,7 @@ config LEDS_LOCOMO config LEDS_S3C24XX tristate "LED Support for Samsung S3C24XX GPIO LEDs" - depends on LEDS_CLASS && ARCH_S3C2410 + depends on LEDS_CLASS && ARCH_S3C2410 && S3C2410_PWM help This option enables support for LEDs connected to GPIO lines on Samsung S3C24XX series CPUs, such as the S3C2410 and S3C2440. @@ -165,6 +165,12 @@ config LEDS_DA903X This option enables support for on-chip LED drivers found on Dialog Semiconductor DA9030/DA9034 PMICs. +config LEDS_NEO1973_VIBRATOR + tristate "Vibrator Support for the FIC Neo1973 GSM phone" + depends on LEDS_CLASS && MACH_NEO1973 + help + This option enables support for the vibrator on the FIC Neo1973. + comment "LED Triggers" config LEDS_TRIGGERS diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index e1967a29850..a2a92bdcf6a 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -23,6 +23,7 @@ obj-$(CONFIG_LEDS_FSG) += leds-fsg.o obj-$(CONFIG_LEDS_PCA955X) += leds-pca955x.o obj-$(CONFIG_LEDS_DA903X) += leds-da903x.o obj-$(CONFIG_LEDS_HP_DISK) += leds-hp-disk.o +obj-$(CONFIG_LEDS_NEO1973_VIBRATOR) += leds-neo1973-vibrator.o # LED Triggers obj-$(CONFIG_LEDS_TRIGGER_TIMER) += ledtrig-timer.o diff --git a/drivers/leds/leds-neo1973-vibrator.c b/drivers/leds/leds-neo1973-vibrator.c new file mode 100644 index 00000000000..0336e367ce6 --- /dev/null +++ b/drivers/leds/leds-neo1973-vibrator.c @@ -0,0 +1,181 @@ +/* + * LED driver for the vibrator of the FIC Neo1973 GSM Phone + * + * (C) 2006-2007 by OpenMoko, Inc. + * Author: Harald Welte <laforge@openmoko.org> + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Javi Roman <javiroman@kernel-labs.org>: + * Implement PWM support for GTA01Bv4 and later + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/leds.h> +#include <asm/hardware.h> +#include <asm/mach-types.h> +#include <asm/arch/pwm.h> +#include <asm/arch/gta01.h> +#include <asm/plat-s3c/regs-timer.h> + +#define COUNTER 64 + +struct neo1973_vib_priv { + struct led_classdev cdev; + unsigned int gpio; + struct mutex mutex; + unsigned int has_pwm; + struct s3c2410_pwm pwm; +}; + +static void neo1973_vib_vib_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + struct neo1973_vib_priv *vp = + container_of(led_cdev, struct neo1973_vib_priv, cdev); + + /* + * value == 255 -> 99% duty cycle (full power) + * value == 128 -> 50% duty cycle (medium power) + * value == 0 -> 0% duty cycle (zero power) + */ + mutex_lock(&vp->mutex); + if (vp->has_pwm) + s3c2410_pwm_duty_cycle(value/4, &vp->pwm); + else { + if (value) + s3c2410_gpio_setpin(vp->gpio, 1); + else + s3c2410_gpio_setpin(vp->gpio, 0); + } + + mutex_unlock(&vp->mutex); +} + +static struct neo1973_vib_priv neo1973_vib_led = { + .cdev = { + .name = "neo1973:vibrator", + .brightness_set = neo1973_vib_vib_set, + }, +}; + +static int neo1973_vib_init_hw(struct neo1973_vib_priv *vp) +{ + int rc; + + rc = s3c2410_pwm_init(&vp->pwm); + if (rc) + return rc; + + vp->pwm.timerid = PWM3; + /* use same prescaler as arch/arm/plat-s3c24xx/time.c */ + vp->pwm.prescaler = (6 - 1) / 2; + vp->pwm.divider = S3C2410_TCFG1_MUX3_DIV2; + vp->pwm.counter = COUNTER; + vp->pwm.comparer = COUNTER; + + rc = s3c2410_pwm_enable(&vp->pwm); + if (rc) + return rc; + + s3c2410_pwm_start(&vp->pwm); + + return 0; +} + +#ifdef CONFIG_PM +static int neo1973_vib_suspend(struct platform_device *dev, pm_message_t state) +{ + led_classdev_suspend(&neo1973_vib_led.cdev); + return 0; +} + +static int neo1973_vib_resume(struct platform_device *dev) +{ + struct neo1973_vib_priv *vp = platform_get_drvdata(dev); + + if (vp->has_pwm) + neo1973_vib_init_hw(vp); + + led_classdev_resume(&neo1973_vib_led.cdev); + + return 0; +} +#endif /* CONFIG_PM */ + +static int __init neo1973_vib_probe(struct platform_device *pdev) +{ + struct resource *r; + int rc; + + if (!machine_is_neo1973_gta01()) + return -EIO; + + r = platform_get_resource(pdev, 0, 0); + if (!r || !r->start) + return -EIO; + + neo1973_vib_led.gpio = r->start; + platform_set_drvdata(pdev, &neo1973_vib_led); + + /* TOUT3 */ + if (neo1973_vib_led.gpio == S3C2410_GPB3) { + rc = neo1973_vib_init_hw(&neo1973_vib_led); + if (rc) + return rc; + + s3c2410_pwm_duty_cycle(0, &neo1973_vib_led.pwm); + s3c2410_gpio_cfgpin(neo1973_vib_led.gpio, S3C2410_GPB3_TOUT3); + neo1973_vib_led.has_pwm = 1; + } + + mutex_init(&neo1973_vib_led.mutex); + + return led_classdev_register(&pdev->dev, &neo1973_vib_led.cdev); +} + +static int neo1973_vib_remove(struct platform_device *pdev) +{ + if (neo1973_vib_led.has_pwm) + s3c2410_pwm_disable(&neo1973_vib_led.pwm); + + led_classdev_unregister(&neo1973_vib_led.cdev); + + mutex_destroy(&neo1973_vib_led.mutex); + + return 0; +} + +static struct platform_driver neo1973_vib_driver = { + .probe = neo1973_vib_probe, + .remove = neo1973_vib_remove, +#ifdef CONFIG_PM + .suspend = neo1973_vib_suspend, + .resume = neo1973_vib_resume, +#endif + .driver = { + .name = "neo1973-vibrator", + }, +}; + +static int __init neo1973_vib_init(void) +{ + return platform_driver_register(&neo1973_vib_driver); +} + +static void __exit neo1973_vib_exit(void) +{ + platform_driver_unregister(&neo1973_vib_driver); +} + +module_init(neo1973_vib_init); +module_exit(neo1973_vib_exit); + +MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>"); +MODULE_DESCRIPTION("FIC Neo1973 vibrator driver"); +MODULE_LICENSE("GPL"); |