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254 lines
5.5 KiB
254 lines
5.5 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* leds-sunfire.c: SUNW,Ultra-Enterprise LED driver. |
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* |
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* Copyright (C) 2008 David S. Miller <[email protected]> |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/leds.h> |
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#include <linux/io.h> |
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#include <linux/platform_device.h> |
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#include <linux/slab.h> |
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#include <asm/fhc.h> |
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#include <asm/upa.h> |
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MODULE_AUTHOR("David S. Miller ([email protected])"); |
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MODULE_DESCRIPTION("Sun Fire LED driver"); |
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MODULE_LICENSE("GPL"); |
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struct sunfire_led { |
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struct led_classdev led_cdev; |
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void __iomem *reg; |
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}; |
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#define to_sunfire_led(d) container_of(d, struct sunfire_led, led_cdev) |
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static void __clockboard_set(struct led_classdev *led_cdev, |
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enum led_brightness led_val, u8 bit) |
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{ |
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struct sunfire_led *p = to_sunfire_led(led_cdev); |
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u8 reg = upa_readb(p->reg); |
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switch (bit) { |
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case CLOCK_CTRL_LLED: |
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if (led_val) |
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reg &= ~bit; |
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else |
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reg |= bit; |
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break; |
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default: |
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if (led_val) |
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reg |= bit; |
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else |
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reg &= ~bit; |
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break; |
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} |
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upa_writeb(reg, p->reg); |
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} |
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static void clockboard_left_set(struct led_classdev *led_cdev, |
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enum led_brightness led_val) |
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{ |
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__clockboard_set(led_cdev, led_val, CLOCK_CTRL_LLED); |
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} |
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static void clockboard_middle_set(struct led_classdev *led_cdev, |
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enum led_brightness led_val) |
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{ |
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__clockboard_set(led_cdev, led_val, CLOCK_CTRL_MLED); |
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} |
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static void clockboard_right_set(struct led_classdev *led_cdev, |
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enum led_brightness led_val) |
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{ |
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__clockboard_set(led_cdev, led_val, CLOCK_CTRL_RLED); |
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} |
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static void __fhc_set(struct led_classdev *led_cdev, |
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enum led_brightness led_val, u32 bit) |
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{ |
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struct sunfire_led *p = to_sunfire_led(led_cdev); |
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u32 reg = upa_readl(p->reg); |
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switch (bit) { |
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case FHC_CONTROL_LLED: |
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if (led_val) |
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reg &= ~bit; |
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else |
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reg |= bit; |
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break; |
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default: |
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if (led_val) |
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reg |= bit; |
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else |
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reg &= ~bit; |
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break; |
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} |
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upa_writel(reg, p->reg); |
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} |
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static void fhc_left_set(struct led_classdev *led_cdev, |
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enum led_brightness led_val) |
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{ |
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__fhc_set(led_cdev, led_val, FHC_CONTROL_LLED); |
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} |
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static void fhc_middle_set(struct led_classdev *led_cdev, |
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enum led_brightness led_val) |
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{ |
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__fhc_set(led_cdev, led_val, FHC_CONTROL_MLED); |
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} |
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static void fhc_right_set(struct led_classdev *led_cdev, |
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enum led_brightness led_val) |
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{ |
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__fhc_set(led_cdev, led_val, FHC_CONTROL_RLED); |
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} |
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typedef void (*set_handler)(struct led_classdev *, enum led_brightness); |
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struct led_type { |
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const char *name; |
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set_handler handler; |
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const char *default_trigger; |
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}; |
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#define NUM_LEDS_PER_BOARD 3 |
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struct sunfire_drvdata { |
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struct sunfire_led leds[NUM_LEDS_PER_BOARD]; |
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}; |
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static int sunfire_led_generic_probe(struct platform_device *pdev, |
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struct led_type *types) |
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{ |
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struct sunfire_drvdata *p; |
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int i, err; |
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if (pdev->num_resources != 1) { |
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dev_err(&pdev->dev, "Wrong number of resources %d, should be 1\n", |
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pdev->num_resources); |
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return -EINVAL; |
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} |
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p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL); |
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if (!p) |
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return -ENOMEM; |
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for (i = 0; i < NUM_LEDS_PER_BOARD; i++) { |
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struct led_classdev *lp = &p->leds[i].led_cdev; |
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p->leds[i].reg = (void __iomem *) pdev->resource[0].start; |
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lp->name = types[i].name; |
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lp->brightness = LED_FULL; |
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lp->brightness_set = types[i].handler; |
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lp->default_trigger = types[i].default_trigger; |
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err = led_classdev_register(&pdev->dev, lp); |
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if (err) { |
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dev_err(&pdev->dev, "Could not register %s LED\n", |
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lp->name); |
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for (i--; i >= 0; i--) |
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led_classdev_unregister(&p->leds[i].led_cdev); |
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return err; |
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} |
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} |
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platform_set_drvdata(pdev, p); |
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return 0; |
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} |
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static int sunfire_led_generic_remove(struct platform_device *pdev) |
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{ |
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struct sunfire_drvdata *p = platform_get_drvdata(pdev); |
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int i; |
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for (i = 0; i < NUM_LEDS_PER_BOARD; i++) |
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led_classdev_unregister(&p->leds[i].led_cdev); |
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return 0; |
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} |
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static struct led_type clockboard_led_types[NUM_LEDS_PER_BOARD] = { |
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{ |
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.name = "clockboard-left", |
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.handler = clockboard_left_set, |
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}, |
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{ |
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.name = "clockboard-middle", |
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.handler = clockboard_middle_set, |
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}, |
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{ |
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.name = "clockboard-right", |
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.handler = clockboard_right_set, |
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.default_trigger = "heartbeat", |
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}, |
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}; |
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static int sunfire_clockboard_led_probe(struct platform_device *pdev) |
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{ |
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return sunfire_led_generic_probe(pdev, clockboard_led_types); |
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} |
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static struct led_type fhc_led_types[NUM_LEDS_PER_BOARD] = { |
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{ |
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.name = "fhc-left", |
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.handler = fhc_left_set, |
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}, |
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{ |
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.name = "fhc-middle", |
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.handler = fhc_middle_set, |
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}, |
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{ |
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.name = "fhc-right", |
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.handler = fhc_right_set, |
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.default_trigger = "heartbeat", |
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}, |
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}; |
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static int sunfire_fhc_led_probe(struct platform_device *pdev) |
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{ |
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return sunfire_led_generic_probe(pdev, fhc_led_types); |
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} |
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MODULE_ALIAS("platform:sunfire-clockboard-leds"); |
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MODULE_ALIAS("platform:sunfire-fhc-leds"); |
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static struct platform_driver sunfire_clockboard_led_driver = { |
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.probe = sunfire_clockboard_led_probe, |
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.remove = sunfire_led_generic_remove, |
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.driver = { |
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.name = "sunfire-clockboard-leds", |
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}, |
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}; |
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static struct platform_driver sunfire_fhc_led_driver = { |
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.probe = sunfire_fhc_led_probe, |
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.remove = sunfire_led_generic_remove, |
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.driver = { |
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.name = "sunfire-fhc-leds", |
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}, |
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}; |
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static struct platform_driver * const drivers[] = { |
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&sunfire_clockboard_led_driver, |
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&sunfire_fhc_led_driver, |
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}; |
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static int __init sunfire_leds_init(void) |
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{ |
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return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); |
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} |
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static void __exit sunfire_leds_exit(void) |
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{ |
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platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); |
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} |
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module_init(sunfire_leds_init); |
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module_exit(sunfire_leds_exit);
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