1 // SPDX-License-Identifier: GPL-2.0-only
7 #include <linux/leds.h>
18 #define BCM63138_LED_MASK				((1 << BCM63138_LED_BITS) - 1)	/* 0xf */
54 	struct bcm63138_leds *leds;  member
64 static void bcm63138_leds_write(struct bcm63138_leds *leds, unsigned int reg,  in bcm63138_leds_write()  argument
67 	writel(data, leds->base + reg);  in bcm63138_leds_write()
70 static unsigned long bcm63138_leds_read(struct bcm63138_leds *leds,  in bcm63138_leds_read()  argument
73 	return readl(leds->base + reg);  in bcm63138_leds_read()
76 static void bcm63138_leds_update_bits(struct bcm63138_leds *leds,  in bcm63138_leds_update_bits()  argument
81 	bcm63138_leds_write(leds, reg, (bcm63138_leds_read(leds, reg) & ~mask) | (val & mask));  in bcm63138_leds_update_bits()
88 static void bcm63138_leds_set_flash_rate(struct bcm63138_leds *leds,  in bcm63138_leds_set_flash_rate()  argument
92 	int reg_offset = (led->pin >> fls((BCM63138_LEDS_PER_REG - 1))) * 4;  in bcm63138_leds_set_flash_rate()
93 	int shift = (led->pin & (BCM63138_LEDS_PER_REG - 1)) * BCM63138_LED_BITS;  in bcm63138_leds_set_flash_rate()
95 	bcm63138_leds_update_bits(leds, BCM63138_FLASH_RATE_CTRL1 + reg_offset,  in bcm63138_leds_set_flash_rate()
99 static void bcm63138_leds_set_bright(struct bcm63138_leds *leds,  in bcm63138_leds_set_bright()  argument
103 	int reg_offset = (led->pin >> fls((BCM63138_LEDS_PER_REG - 1))) * 4;  in bcm63138_leds_set_bright()
104 	int shift = (led->pin & (BCM63138_LEDS_PER_REG - 1)) * BCM63138_LED_BITS;  in bcm63138_leds_set_bright()
106 	bcm63138_leds_update_bits(leds, BCM63138_BRIGHT_CTRL1 + reg_offset,  in bcm63138_leds_set_bright()
110 static void bcm63138_leds_enable_led(struct bcm63138_leds *leds,  in bcm63138_leds_enable_led()  argument
114 	u32 bit = BIT(led->pin);  in bcm63138_leds_enable_led()
116 	bcm63138_leds_update_bits(leds, BCM63138_SW_DATA, bit, value ? bit : 0);  in bcm63138_leds_enable_led()
127 	struct bcm63138_leds *leds = led->leds;  in bcm63138_leds_brightness_set()  local
130 	spin_lock_irqsave(&leds->lock, flags);  in bcm63138_leds_brightness_set()
132 	bcm63138_leds_enable_led(leds, led, value);  in bcm63138_leds_brightness_set()
134 		bcm63138_leds_set_flash_rate(leds, led, 0);  in bcm63138_leds_brightness_set()
136 		bcm63138_leds_set_bright(leds, led, value);  in bcm63138_leds_brightness_set()
138 	spin_unlock_irqrestore(&leds->lock, flags);  in bcm63138_leds_brightness_set()
146 	struct bcm63138_leds *leds = led->leds;  in bcm63138_leds_blink_set()  local
156 		dev_dbg(led_cdev->dev, "Blinking at unequal delays is not supported\n");  in bcm63138_leds_blink_set()
157 		return -EINVAL;  in bcm63138_leds_blink_set()
177 		dev_dbg(led_cdev->dev, "Blinking delay value %lu is unsupported\n",  in bcm63138_leds_blink_set()
179 		return -EINVAL;  in bcm63138_leds_blink_set()
182 	spin_lock_irqsave(&leds->lock, flags);  in bcm63138_leds_blink_set()
184 	bcm63138_leds_enable_led(leds, led, BCM63138_MAX_BRIGHTNESS);  in bcm63138_leds_blink_set()
185 	bcm63138_leds_set_flash_rate(leds, led, value);  in bcm63138_leds_blink_set()
187 	spin_unlock_irqrestore(&leds->lock, flags);  in bcm63138_leds_blink_set()
196 static void bcm63138_leds_create_led(struct bcm63138_leds *leds,  in bcm63138_leds_create_led()  argument
202 	struct device *dev = leds->dev;  in bcm63138_leds_create_led()
214 	led->leds = leds;  in bcm63138_leds_create_led()
216 	if (of_property_read_u32(np, "reg", &led->pin)) {  in bcm63138_leds_create_led()
221 	if (led->pin >= BCM63138_MAX_LEDS) {  in bcm63138_leds_create_led()
222 		dev_err(dev, "Invalid \"reg\" value %d\n", led->pin);  in bcm63138_leds_create_led()
226 	led->active_low = of_property_read_bool(np, "active-low");  in bcm63138_leds_create_led()
228 	led->cdev.max_brightness = BCM63138_MAX_BRIGHTNESS;  in bcm63138_leds_create_led()
229 	led->cdev.brightness_set = bcm63138_leds_brightness_set;  in bcm63138_leds_create_led()
230 	led->cdev.blink_set = bcm63138_leds_blink_set;  in bcm63138_leds_create_led()
232 	err = devm_led_classdev_register_ext(dev, &led->cdev, &init_data);  in bcm63138_leds_create_led()
238 	pinctrl = devm_pinctrl_get_select_default(led->cdev.dev);  in bcm63138_leds_create_led()
239 	if (IS_ERR(pinctrl) && PTR_ERR(pinctrl) != -ENODEV) {  in bcm63138_leds_create_led()
240 		dev_warn(led->cdev.dev, "Failed to select %pOF pinctrl: %ld\n",  in bcm63138_leds_create_led()
244 	bit = BIT(led->pin);  in bcm63138_leds_create_led()
245 	bcm63138_leds_update_bits(leds, BCM63138_PARALLEL_LED_POLARITY, bit,  in bcm63138_leds_create_led()
246 				  led->active_low ? 0 : bit);  in bcm63138_leds_create_led()
247 	bcm63138_leds_update_bits(leds, BCM63138_HW_LED_EN, bit, 0);  in bcm63138_leds_create_led()
248 	bcm63138_leds_set_flash_rate(leds, led, 0);  in bcm63138_leds_create_led()
249 	bcm63138_leds_enable_led(leds, led, led->cdev.brightness);  in bcm63138_leds_create_led()
259 	struct device_node *np = dev_of_node(&pdev->dev);  in bcm63138_leds_probe()
260 	struct device *dev = &pdev->dev;  in bcm63138_leds_probe()
261 	struct bcm63138_leds *leds;  in bcm63138_leds_probe()  local
264 	leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);  in bcm63138_leds_probe()
265 	if (!leds)  in bcm63138_leds_probe()
266 		return -ENOMEM;  in bcm63138_leds_probe()
268 	leds->dev = dev;  in bcm63138_leds_probe()
270 	leds->base = devm_platform_ioremap_resource(pdev, 0);  in bcm63138_leds_probe()
271 	if (IS_ERR(leds->base))  in bcm63138_leds_probe()
272 		return PTR_ERR(leds->base);  in bcm63138_leds_probe()
274 	spin_lock_init(&leds->lock);  in bcm63138_leds_probe()
276 	bcm63138_leds_write(leds, BCM63138_GLB_CTRL,  in bcm63138_leds_probe()
279 	bcm63138_leds_write(leds, BCM63138_HW_LED_EN, 0);  in bcm63138_leds_probe()
280 	bcm63138_leds_write(leds, BCM63138_SERIAL_LED_POLARITY, 0);  in bcm63138_leds_probe()
281 	bcm63138_leds_write(leds, BCM63138_PARALLEL_LED_POLARITY, 0);  in bcm63138_leds_probe()
284 		bcm63138_leds_create_led(leds, child);  in bcm63138_leds_probe()
291 	{ .compatible = "brcm,bcm63138-leds", },
298 		.name = "leds-bcm63xxx",