Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Simon Guinot | 1285 | 69.31% | 6 | 27.27% |
Vincent Donnefort | 229 | 12.35% | 1 | 4.55% |
Linus Walleij | 161 | 8.68% | 2 | 9.09% |
Jacek Anaszewski | 69 | 3.72% | 1 | 4.55% |
Johan Hovold | 29 | 1.56% | 1 | 4.55% |
Nishka Dasgupta | 29 | 1.56% | 1 | 4.55% |
Bryan Wu | 16 | 0.86% | 1 | 4.55% |
Sachin Kamat | 9 | 0.49% | 2 | 9.09% |
Luis de Bethencourt | 7 | 0.38% | 1 | 4.55% |
Axel Lin | 6 | 0.32% | 1 | 4.55% |
Jingoo Han | 5 | 0.27% | 2 | 9.09% |
Kees Cook | 4 | 0.22% | 1 | 4.55% |
Paul Gortmaker | 3 | 0.16% | 1 | 4.55% |
Thomas Gleixner | 2 | 0.11% | 1 | 4.55% |
Total | 1854 | 22 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * leds-ns2.c - Driver for the Network Space v2 (and parents) dual-GPIO LED * * Copyright (C) 2010 LaCie * * Author: Simon Guinot <sguinot@lacie.com> * * Based on leds-gpio.c by Raphael Assenat <raph@8d.com> */ #include <linux/kernel.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/gpio/consumer.h> #include <linux/leds.h> #include <linux/module.h> #include <linux/of.h> #include "leds.h" enum ns2_led_modes { NS_V2_LED_OFF, NS_V2_LED_ON, NS_V2_LED_SATA, }; struct ns2_led_modval { enum ns2_led_modes mode; int cmd_level; int slow_level; }; struct ns2_led { const char *name; const char *default_trigger; struct gpio_desc *cmd; struct gpio_desc *slow; int num_modes; struct ns2_led_modval *modval; }; struct ns2_led_platform_data { int num_leds; struct ns2_led *leds; }; /* * The Network Space v2 dual-GPIO LED is wired to a CPLD. Three different LED * modes are available: off, on and SATA activity blinking. The LED modes are * controlled through two GPIOs (command and slow): each combination of values * for the command/slow GPIOs corresponds to a LED mode. */ struct ns2_led_data { struct led_classdev cdev; struct gpio_desc *cmd; struct gpio_desc *slow; bool can_sleep; unsigned char sata; /* True when SATA mode active. */ rwlock_t rw_lock; /* Lock GPIOs. */ int num_modes; struct ns2_led_modval *modval; }; static int ns2_led_get_mode(struct ns2_led_data *led_dat, enum ns2_led_modes *mode) { int i; int ret = -EINVAL; int cmd_level; int slow_level; cmd_level = gpiod_get_value_cansleep(led_dat->cmd); slow_level = gpiod_get_value_cansleep(led_dat->slow); for (i = 0; i < led_dat->num_modes; i++) { if (cmd_level == led_dat->modval[i].cmd_level && slow_level == led_dat->modval[i].slow_level) { *mode = led_dat->modval[i].mode; ret = 0; break; } } return ret; } static void ns2_led_set_mode(struct ns2_led_data *led_dat, enum ns2_led_modes mode) { int i; bool found = false; unsigned long flags; for (i = 0; i < led_dat->num_modes; i++) if (mode == led_dat->modval[i].mode) { found = true; break; } if (!found) return; write_lock_irqsave(&led_dat->rw_lock, flags); if (!led_dat->can_sleep) { gpiod_set_value(led_dat->cmd, led_dat->modval[i].cmd_level); gpiod_set_value(led_dat->slow, led_dat->modval[i].slow_level); goto exit_unlock; } gpiod_set_value_cansleep(led_dat->cmd, led_dat->modval[i].cmd_level); gpiod_set_value_cansleep(led_dat->slow, led_dat->modval[i].slow_level); exit_unlock: write_unlock_irqrestore(&led_dat->rw_lock, flags); } static void ns2_led_set(struct led_classdev *led_cdev, enum led_brightness value) { struct ns2_led_data *led_dat = container_of(led_cdev, struct ns2_led_data, cdev); enum ns2_led_modes mode; if (value == LED_OFF) mode = NS_V2_LED_OFF; else if (led_dat->sata) mode = NS_V2_LED_SATA; else mode = NS_V2_LED_ON; ns2_led_set_mode(led_dat, mode); } static int ns2_led_set_blocking(struct led_classdev *led_cdev, enum led_brightness value) { ns2_led_set(led_cdev, value); return 0; } static ssize_t ns2_led_sata_store(struct device *dev, struct device_attribute *attr, const char *buff, size_t count) { struct led_classdev *led_cdev = dev_get_drvdata(dev); struct ns2_led_data *led_dat = container_of(led_cdev, struct ns2_led_data, cdev); int ret; unsigned long enable; ret = kstrtoul(buff, 10, &enable); if (ret < 0) return ret; enable = !!enable; if (led_dat->sata == enable) goto exit; led_dat->sata = enable; if (!led_get_brightness(led_cdev)) goto exit; if (enable) ns2_led_set_mode(led_dat, NS_V2_LED_SATA); else ns2_led_set_mode(led_dat, NS_V2_LED_ON); exit: return count; } static ssize_t ns2_led_sata_show(struct device *dev, struct device_attribute *attr, char *buf) { struct led_classdev *led_cdev = dev_get_drvdata(dev); struct ns2_led_data *led_dat = container_of(led_cdev, struct ns2_led_data, cdev); return sprintf(buf, "%d\n", led_dat->sata); } static DEVICE_ATTR(sata, 0644, ns2_led_sata_show, ns2_led_sata_store); static struct attribute *ns2_led_attrs[] = { &dev_attr_sata.attr, NULL }; ATTRIBUTE_GROUPS(ns2_led); static int create_ns2_led(struct platform_device *pdev, struct ns2_led_data *led_dat, const struct ns2_led *template) { int ret; enum ns2_led_modes mode; rwlock_init(&led_dat->rw_lock); led_dat->cdev.name = template->name; led_dat->cdev.default_trigger = template->default_trigger; led_dat->cdev.blink_set = NULL; led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME; led_dat->cdev.groups = ns2_led_groups; led_dat->cmd = template->cmd; led_dat->slow = template->slow; led_dat->can_sleep = gpiod_cansleep(led_dat->cmd) | gpiod_cansleep(led_dat->slow); if (led_dat->can_sleep) led_dat->cdev.brightness_set_blocking = ns2_led_set_blocking; else led_dat->cdev.brightness_set = ns2_led_set; led_dat->modval = template->modval; led_dat->num_modes = template->num_modes; ret = ns2_led_get_mode(led_dat, &mode); if (ret < 0) return ret; /* Set LED initial state. */ led_dat->sata = (mode == NS_V2_LED_SATA) ? 1 : 0; led_dat->cdev.brightness = (mode == NS_V2_LED_OFF) ? LED_OFF : LED_FULL; ret = led_classdev_register(&pdev->dev, &led_dat->cdev); if (ret < 0) return ret; return 0; } static void delete_ns2_led(struct ns2_led_data *led_dat) { led_classdev_unregister(&led_dat->cdev); } #ifdef CONFIG_OF_GPIO /* * Translate OpenFirmware node properties into platform_data. */ static int ns2_leds_get_of_pdata(struct device *dev, struct ns2_led_platform_data *pdata) { struct device_node *np = dev->of_node; struct device_node *child; struct ns2_led *led, *leds; int ret, num_leds = 0; num_leds = of_get_child_count(np); if (!num_leds) return -ENODEV; leds = devm_kcalloc(dev, num_leds, sizeof(struct ns2_led), GFP_KERNEL); if (!leds) return -ENOMEM; led = leds; for_each_child_of_node(np, child) { const char *string; int i, num_modes; struct ns2_led_modval *modval; struct gpio_desc *gd; ret = of_property_read_string(child, "label", &string); led->name = (ret == 0) ? string : child->name; gd = gpiod_get_from_of_node(child, "cmd-gpio", 0, GPIOD_ASIS, led->name); if (IS_ERR(gd)) { ret = PTR_ERR(gd); goto err_node_put; } led->cmd = gd; gd = gpiod_get_from_of_node(child, "slow-gpio", 0, GPIOD_ASIS, led->name); if (IS_ERR(gd)) { ret = PTR_ERR(gd); goto err_node_put; } led->slow = gd; ret = of_property_read_string(child, "linux,default-trigger", &string); if (ret == 0) led->default_trigger = string; ret = of_property_count_u32_elems(child, "modes-map"); if (ret < 0 || ret % 3) { dev_err(dev, "Missing or malformed modes-map property\n"); ret = -EINVAL; goto err_node_put; } num_modes = ret / 3; modval = devm_kcalloc(dev, num_modes, sizeof(struct ns2_led_modval), GFP_KERNEL); if (!modval) { ret = -ENOMEM; goto err_node_put; } for (i = 0; i < num_modes; i++) { of_property_read_u32_index(child, "modes-map", 3 * i, (u32 *) &modval[i].mode); of_property_read_u32_index(child, "modes-map", 3 * i + 1, (u32 *) &modval[i].cmd_level); of_property_read_u32_index(child, "modes-map", 3 * i + 2, (u32 *) &modval[i].slow_level); } led->num_modes = num_modes; led->modval = modval; led++; } pdata->leds = leds; pdata->num_leds = num_leds; return 0; err_node_put: of_node_put(child); return ret; } static const struct of_device_id of_ns2_leds_match[] = { { .compatible = "lacie,ns2-leds", }, {}, }; MODULE_DEVICE_TABLE(of, of_ns2_leds_match); #endif /* CONFIG_OF_GPIO */ struct ns2_led_priv { int num_leds; struct ns2_led_data leds_data[]; }; static inline int sizeof_ns2_led_priv(int num_leds) { return sizeof(struct ns2_led_priv) + (sizeof(struct ns2_led_data) * num_leds); } static int ns2_led_probe(struct platform_device *pdev) { struct ns2_led_platform_data *pdata = dev_get_platdata(&pdev->dev); struct ns2_led_priv *priv; int i; int ret; #ifdef CONFIG_OF_GPIO if (!pdata) { pdata = devm_kzalloc(&pdev->dev, sizeof(struct ns2_led_platform_data), GFP_KERNEL); if (!pdata) return -ENOMEM; ret = ns2_leds_get_of_pdata(&pdev->dev, pdata); if (ret) return ret; } #else if (!pdata) return -EINVAL; #endif /* CONFIG_OF_GPIO */ priv = devm_kzalloc(&pdev->dev, sizeof_ns2_led_priv(pdata->num_leds), GFP_KERNEL); if (!priv) return -ENOMEM; priv->num_leds = pdata->num_leds; for (i = 0; i < priv->num_leds; i++) { ret = create_ns2_led(pdev, &priv->leds_data[i], &pdata->leds[i]); if (ret < 0) { for (i = i - 1; i >= 0; i--) delete_ns2_led(&priv->leds_data[i]); return ret; } } platform_set_drvdata(pdev, priv); return 0; } static int ns2_led_remove(struct platform_device *pdev) { int i; struct ns2_led_priv *priv; priv = platform_get_drvdata(pdev); for (i = 0; i < priv->num_leds; i++) delete_ns2_led(&priv->leds_data[i]); return 0; } static struct platform_driver ns2_led_driver = { .probe = ns2_led_probe, .remove = ns2_led_remove, .driver = { .name = "leds-ns2", .of_match_table = of_match_ptr(of_ns2_leds_match), }, }; module_platform_driver(ns2_led_driver); MODULE_AUTHOR("Simon Guinot <sguinot@lacie.com>"); MODULE_DESCRIPTION("Network Space v2 LED driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:leds-ns2");
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