diff options
Diffstat (limited to 'drivers/leds/leds-asic3.c')
| -rw-r--r-- | drivers/leds/leds-asic3.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/drivers/leds/leds-asic3.c b/drivers/leds/leds-asic3.c deleted file mode 100644 index 8cbc1b8bafa5..000000000000 --- a/drivers/leds/leds-asic3.c +++ /dev/null @@ -1,177 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Copyright (C) 2011 Paul Parsons <lost.distance@yahoo.com> - */ - -#include <linux/kernel.h> -#include <linux/platform_device.h> -#include <linux/leds.h> -#include <linux/slab.h> - -#include <linux/mfd/asic3.h> -#include <linux/mfd/core.h> -#include <linux/module.h> - -/* - * The HTC ASIC3 LED GPIOs are inputs, not outputs. - * Hence we turn the LEDs on/off via the TimeBase register. - */ - -/* - * When TimeBase is 4 the clock resolution is about 32Hz. - * This driver supports hardware blinking with an on+off - * period from 62ms (2 clocks) to 125s (4000 clocks). - */ -#define MS_TO_CLK(ms) DIV_ROUND_CLOSEST(((ms)*1024), 32000) -#define CLK_TO_MS(clk) (((clk)*32000)/1024) -#define MAX_CLK 4000 /* Fits into 12-bit Time registers */ -#define MAX_MS CLK_TO_MS(MAX_CLK) - -static const unsigned int led_n_base[ASIC3_NUM_LEDS] = { - [0] = ASIC3_LED_0_Base, - [1] = ASIC3_LED_1_Base, - [2] = ASIC3_LED_2_Base, -}; - -static void brightness_set(struct led_classdev *cdev, - enum led_brightness value) -{ - struct platform_device *pdev = to_platform_device(cdev->dev->parent); - const struct mfd_cell *cell = mfd_get_cell(pdev); - struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); - u32 timebase; - unsigned int base; - - timebase = (value == LED_OFF) ? 0 : (LED_EN|0x4); - - base = led_n_base[cell->id]; - asic3_write_register(asic, (base + ASIC3_LED_PeriodTime), 32); - asic3_write_register(asic, (base + ASIC3_LED_DutyTime), 32); - asic3_write_register(asic, (base + ASIC3_LED_AutoStopCount), 0); - asic3_write_register(asic, (base + ASIC3_LED_TimeBase), timebase); -} - -static int blink_set(struct led_classdev *cdev, - unsigned long *delay_on, - unsigned long *delay_off) -{ - struct platform_device *pdev = to_platform_device(cdev->dev->parent); - const struct mfd_cell *cell = mfd_get_cell(pdev); - struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); - u32 on; - u32 off; - unsigned int base; - - if (*delay_on > MAX_MS || *delay_off > MAX_MS) - return -EINVAL; - - if (*delay_on == 0 && *delay_off == 0) { - /* If both are zero then a sensible default should be chosen */ - on = MS_TO_CLK(500); - off = MS_TO_CLK(500); - } else { - on = MS_TO_CLK(*delay_on); - off = MS_TO_CLK(*delay_off); - if ((on + off) > MAX_CLK) - return -EINVAL; - } - - base = led_n_base[cell->id]; - asic3_write_register(asic, (base + ASIC3_LED_PeriodTime), (on + off)); - asic3_write_register(asic, (base + ASIC3_LED_DutyTime), on); - asic3_write_register(asic, (base + ASIC3_LED_AutoStopCount), 0); - asic3_write_register(asic, (base + ASIC3_LED_TimeBase), (LED_EN|0x4)); - - *delay_on = CLK_TO_MS(on); - *delay_off = CLK_TO_MS(off); - - return 0; -} - -static int asic3_led_probe(struct platform_device *pdev) -{ - struct asic3_led *led = dev_get_platdata(&pdev->dev); - int ret; - - ret = mfd_cell_enable(pdev); - if (ret < 0) - return ret; - - led->cdev = devm_kzalloc(&pdev->dev, sizeof(struct led_classdev), - GFP_KERNEL); - if (!led->cdev) { - ret = -ENOMEM; - goto out; - } - - led->cdev->name = led->name; - led->cdev->flags = LED_CORE_SUSPENDRESUME; - led->cdev->brightness_set = brightness_set; - led->cdev->blink_set = blink_set; - led->cdev->default_trigger = led->default_trigger; - - ret = led_classdev_register(&pdev->dev, led->cdev); - if (ret < 0) - goto out; - - return 0; - -out: - (void) mfd_cell_disable(pdev); - return ret; -} - -static int asic3_led_remove(struct platform_device *pdev) -{ - struct asic3_led *led = dev_get_platdata(&pdev->dev); - - led_classdev_unregister(led->cdev); - - return mfd_cell_disable(pdev); -} - -#ifdef CONFIG_PM_SLEEP -static int asic3_led_suspend(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - const struct mfd_cell *cell = mfd_get_cell(pdev); - int ret; - - ret = 0; - if (cell->suspend) - ret = (*cell->suspend)(pdev); - - return ret; -} - -static int asic3_led_resume(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - const struct mfd_cell *cell = mfd_get_cell(pdev); - int ret; - - ret = 0; - if (cell->resume) - ret = (*cell->resume)(pdev); - - return ret; -} -#endif - -static SIMPLE_DEV_PM_OPS(asic3_led_pm_ops, asic3_led_suspend, asic3_led_resume); - -static struct platform_driver asic3_led_driver = { - .probe = asic3_led_probe, - .remove = asic3_led_remove, - .driver = { - .name = "leds-asic3", - .pm = &asic3_led_pm_ops, - }, -}; - -module_platform_driver(asic3_led_driver); - -MODULE_AUTHOR("Paul Parsons <lost.distance@yahoo.com>"); -MODULE_DESCRIPTION("HTC ASIC3 LED driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:leds-asic3"); |