litmus-rt.git - The LITMUS^RT kernel.

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author	Peter Ujfalusi <peter.ujfalusi@ti.com>	2012-08-22 06:11:43 -0400
committer	Mark Brown <broonie@opensource.wolfsonmicro.com>	2012-08-25 16:30:27 -0400
commit	db61550931957ee6c7dba751662919424b4344f3 (patch)
tree	53c9963ac18d67185fbd5ac70726072e1c2dc0b4 /net/lapb/lapb_subr.c
parent	8996a31c58374742dfb555675a8569617572d82c (diff)

ASoC: omap-mcbsp: Single macro for st channel volume set/get

Since we always need to have set and get callbacks for McBSP sidetone it makes sense to combine the two macro to create the two callbacks. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

Diffstat (limited to 'net/lapb/lapb_subr.c')

0 files changed, 0 insertions, 0 deletions

/* * LEDs driver for GPIOs * * Copyright (C) 2007 8D Technologies inc. * Raphael Assenat <raph@8d.com> * Copyright (C) 2008 Freescale Semiconductor, Inc. * * 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. * */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/platform_device.h> #include <linux/gpio.h> #include <linux/leds.h> #include <linux/of_platform.h> #include <linux/of_gpio.h> #include <linux/slab.h> #include <linux/workqueue.h> #include <linux/module.h> struct gpio_led_data { struct led_classdev cdev; unsigned gpio; struct work_struct work; u8 new_level; u8 can_sleep; u8 active_low; u8 blinking; int (*platform_gpio_blink_set)(unsigned gpio, int state, unsigned long *delay_on, unsigned long *delay_off); }; static void gpio_led_work(struct work_struct *work) { struct gpio_led_data *led_dat = container_of(work, struct gpio_led_data, work); if (led_dat->blinking) { led_dat->platform_gpio_blink_set(led_dat->gpio, led_dat->new_level, NULL, NULL); led_dat->blinking = 0; } else gpio_set_value_cansleep(led_dat->gpio, led_dat->new_level); } static void gpio_led_set(struct led_classdev *led_cdev, enum led_brightness value) { struct gpio_led_data *led_dat = container_of(led_cdev, struct gpio_led_data, cdev); int level; if (value == LED_OFF) level = 0; else level = 1; if (led_dat->active_low) level = !level; /* Setting GPIOs with I2C/etc requires a task context, and we don't * seem to have a reliable way to know if we're already in one; so * let's just assume the worst. */ if (led_dat->can_sleep) { led_dat->new_level = level; schedule_work(&led_dat->work); } else { if (led_dat->blinking) { led_dat->platform_gpio_blink_set(led_dat->gpio, level, NULL, NULL); led_dat->blinking = 0; } else gpio_set_value(led_dat->gpio, level); } } static int gpio_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on, unsigned long *delay_off) { struct gpio_led_data *led_dat = container_of(led_cdev, struct gpio_led_data, cdev); led_dat->blinking = 1; return led_dat->platform_gpio_blink_set(led_dat->gpio, GPIO_LED_BLINK, delay_on, delay_off); } static int __devinit create_gpio_led(const struct gpio_led *template, struct gpio_led_data *led_dat, struct device *parent, int (*blink_set)(unsigned, int, unsigned long *, unsigned long *)) { int ret, state; led_dat->gpio = -1; /* skip leds that aren't available */ if (!gpio_is_valid(template->gpio)) { printk(KERN_INFO "Skipping unavailable LED gpio %d (%s)\n", template->gpio, template->name); return 0; } ret = gpio_request(template->gpio, template->name); if (ret < 0) return ret; led_dat->cdev.name = template->name; led_dat->cdev.default_trigger = template->default_trigger; led_dat->gpio = template->gpio; led_dat->can_sleep = gpio_cansleep(template->gpio); led_dat->active_low = template->active_low; led_dat->blinking = 0; if (blink_set) { led_dat->platform_gpio_blink_set = blink_set; led_dat->cdev.blink_set = gpio_blink_set; } led_dat->cdev.brightness_set = gpio_led_set; if (template->default_state == LEDS_GPIO_DEFSTATE_KEEP) state = !!gpio_get_value_cansleep(led_dat->gpio) ^ led_dat->active_low; else state = (template->default_state == LEDS_GPIO_DEFSTATE_ON); led_dat->cdev.brightness = state ? LED_FULL : LED_OFF; if (!template->retain_state_suspended) led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME; ret = gpio_direction_output(led_dat->gpio, led_dat->active_low ^ state); if (ret < 0) goto err; INIT_WORK(&led_dat->work, gpio_led_work); ret = led_classdev_register(parent, &led_dat->cdev); if (ret < 0) goto err; return 0; err: gpio_free(led_dat->gpio); return ret; } static void delete_gpio_led(struct gpio_led_data *led) { if (!gpio_is_valid(led->gpio)) return; led_classdev_unregister(&led->cdev); cancel_work_sync(&led->work); gpio_free(led->gpio); } struct gpio_leds_priv { int num_leds; struct gpio_led_data leds[]; }; static inline int sizeof_gpio_leds_priv(int num_leds) { return sizeof(struct gpio_leds_priv) + (sizeof(struct gpio_led_data) * num_leds); } /* Code to create from OpenFirmware platform devices */ #ifdef CONFIG_OF_GPIO static struct gpio_leds_priv * __devinit gpio_leds_create_of(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node, *child; struct gpio_leds_priv *priv; int count = 0, ret; /* count LEDs in this device, so we know how much to allocate */ for_each_child_of_node(np, child) count++; if (!count) return NULL; priv = devm_kzalloc(&pdev->dev, sizeof_gpio_leds_priv(count), GFP_KERNEL); if (!priv) return NULL; for_each_child_of_node(np, child) { struct gpio_led led = {}; enum of_gpio_flags flags; const char *state;


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