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100 lines
2.0 KiB
100 lines
2.0 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Copyright (c) 2015 Google, Inc |
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* Written by Simon Glass <[email protected]> |
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*/ |
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#include <common.h> |
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#include <dm.h> |
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#include <errno.h> |
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#include <led.h> |
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#include <dm/device-internal.h> |
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#include <dm/root.h> |
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#include <dm/uclass-internal.h> |
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int led_get_by_label(const char *label, struct udevice **devp) |
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{ |
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struct udevice *dev; |
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struct uclass *uc; |
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int ret; |
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ret = uclass_get(UCLASS_LED, &uc); |
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if (ret) |
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return ret; |
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uclass_foreach_dev(dev, uc) { |
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struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev); |
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/* Ignore the top-level LED node */ |
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if (uc_plat->label && !strcmp(label, uc_plat->label)) |
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return uclass_get_device_tail(dev, 0, devp); |
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} |
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return -ENODEV; |
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} |
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int led_set_state(struct udevice *dev, enum led_state_t state) |
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{ |
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struct led_ops *ops = led_get_ops(dev); |
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if (!ops->set_state) |
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return -ENOSYS; |
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return ops->set_state(dev, state); |
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} |
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enum led_state_t led_get_state(struct udevice *dev) |
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{ |
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struct led_ops *ops = led_get_ops(dev); |
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if (!ops->get_state) |
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return -ENOSYS; |
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return ops->get_state(dev); |
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} |
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#ifdef CONFIG_LED_BLINK |
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int led_set_period(struct udevice *dev, int period_ms) |
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{ |
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struct led_ops *ops = led_get_ops(dev); |
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if (!ops->set_period) |
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return -ENOSYS; |
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return ops->set_period(dev, period_ms); |
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} |
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#endif |
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int led_default_state(void) |
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{ |
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struct udevice *dev; |
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struct uclass *uc; |
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const char *default_state; |
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int ret; |
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ret = uclass_get(UCLASS_LED, &uc); |
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if (ret) |
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return ret; |
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for (uclass_find_first_device(UCLASS_LED, &dev); |
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dev; |
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uclass_find_next_device(&dev)) { |
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default_state = dev_read_string(dev, "default-state"); |
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if (!default_state) |
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continue; |
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ret = device_probe(dev); |
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if (ret) |
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return ret; |
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if (!strncmp(default_state, "on", 2)) |
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led_set_state(dev, LEDST_ON); |
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else if (!strncmp(default_state, "off", 3)) |
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led_set_state(dev, LEDST_OFF); |
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/* default-state = "keep" : device is only probed */ |
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} |
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return ret; |
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} |
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UCLASS_DRIVER(led) = { |
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.id = UCLASS_LED, |
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.name = "led", |
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.per_device_platdata_auto_alloc_size = sizeof(struct led_uc_plat), |
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};
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