1 // SPDX-License-Identifier: GPL-2.0-only
9 #include <linux/leds.h>
20 #define BCM63138_LED_MASK				((1 << BCM63138_LED_BITS) - 1)	/* 0xf */
40 #define BCM63138_POWER_LUT_BASE0			0x34 /* -> b0 */
59 	struct bcm63138_leds *leds;  member
69 static void bcm63138_leds_write(struct bcm63138_leds *leds, unsigned int reg,  in bcm63138_leds_write()  argument
72 	writel(data, leds->base + reg);  in bcm63138_leds_write()
75 static unsigned long bcm63138_leds_read(struct bcm63138_leds *leds,  in bcm63138_leds_read()  argument
78 	return readl(leds->base + reg);  in bcm63138_leds_read()
81 static void bcm63138_leds_update_bits(struct bcm63138_leds *leds,  in bcm63138_leds_update_bits()  argument
86 	bcm63138_leds_write(leds, reg, (bcm63138_leds_read(leds, reg) & ~mask) | (val & mask));  in bcm63138_leds_update_bits()
93 static void bcm63138_leds_set_flash_rate(struct bcm63138_leds *leds,  in bcm63138_leds_set_flash_rate()  argument
97 	int reg_offset = (led->pin >> fls((BCM63138_LEDS_PER_REG - 1))) * 4;  in bcm63138_leds_set_flash_rate()
98 	int shift = (led->pin & (BCM63138_LEDS_PER_REG - 1)) * BCM63138_LED_BITS;  in bcm63138_leds_set_flash_rate()
100 	bcm63138_leds_update_bits(leds, BCM63138_FLASH_RATE_CTRL1 + reg_offset,  in bcm63138_leds_set_flash_rate()
104 static void bcm63138_leds_set_bright(struct bcm63138_leds *leds,  in bcm63138_leds_set_bright()  argument
108 	int reg_offset = (led->pin >> fls((BCM63138_LEDS_PER_REG - 1))) * 4;  in bcm63138_leds_set_bright()
109 	int shift = (led->pin & (BCM63138_LEDS_PER_REG - 1)) * BCM63138_LED_BITS;  in bcm63138_leds_set_bright()
111 	bcm63138_leds_update_bits(leds, BCM63138_BRIGHT_CTRL1 + reg_offset,  in bcm63138_leds_set_bright()
115 static void bcm63138_leds_enable_led(struct bcm63138_leds *leds,  in bcm63138_leds_enable_led()  argument
119 	u32 bit = BIT(led->pin);  in bcm63138_leds_enable_led()
121 	bcm63138_leds_update_bits(leds, BCM63138_SW_DATA, bit, value ? bit : 0);  in bcm63138_leds_enable_led()
132 	struct bcm63138_leds *leds = led->leds;  in bcm63138_leds_brightness_set()  local
134 	guard(spinlock_irqsave)(&leds->lock);  in bcm63138_leds_brightness_set()
136 	bcm63138_leds_enable_led(leds, led, value);  in bcm63138_leds_brightness_set()
138 		bcm63138_leds_set_flash_rate(leds, led, 0);  in bcm63138_leds_brightness_set()
140 		bcm63138_leds_set_bright(leds, led, value);  in bcm63138_leds_brightness_set()
148 	struct bcm63138_leds *leds = led->leds;  in bcm63138_leds_blink_set()  local
157 		dev_dbg(led_cdev->dev, "Blinking at unequal delays is not supported\n");  in bcm63138_leds_blink_set()
158 		return -EINVAL;  in bcm63138_leds_blink_set()
178 		dev_dbg(led_cdev->dev, "Blinking delay value %lu is unsupported\n",  in bcm63138_leds_blink_set()
180 		return -EINVAL;  in bcm63138_leds_blink_set()
183 	guard(spinlock_irqsave)(&leds->lock);  in bcm63138_leds_blink_set()
185 	bcm63138_leds_enable_led(leds, led, BCM63138_MAX_BRIGHTNESS);  in bcm63138_leds_blink_set()
186 	bcm63138_leds_set_flash_rate(leds, led, value);  in bcm63138_leds_blink_set()
195 static void bcm63138_leds_create_led(struct bcm63138_leds *leds,  in bcm63138_leds_create_led()  argument
201 	struct device *dev = leds->dev;  in bcm63138_leds_create_led()
213 	led->leds = leds;  in bcm63138_leds_create_led()
215 	if (of_property_read_u32(np, "reg", &led->pin)) {  in bcm63138_leds_create_led()
220 	if (led->pin >= BCM63138_MAX_LEDS) {  in bcm63138_leds_create_led()
221 		dev_err(dev, "Invalid \"reg\" value %d\n", led->pin);  in bcm63138_leds_create_led()
225 	led->active_low = of_property_read_bool(np, "active-low");  in bcm63138_leds_create_led()
227 	led->cdev.max_brightness = BCM63138_MAX_BRIGHTNESS;  in bcm63138_leds_create_led()
228 	led->cdev.brightness_set = bcm63138_leds_brightness_set;  in bcm63138_leds_create_led()
229 	led->cdev.blink_set = bcm63138_leds_blink_set;  in bcm63138_leds_create_led()
231 	err = devm_led_classdev_register_ext(dev, &led->cdev, &init_data);  in bcm63138_leds_create_led()
237 	pinctrl = devm_pinctrl_get_select_default(led->cdev.dev);  in bcm63138_leds_create_led()
238 	if (IS_ERR(pinctrl) && PTR_ERR(pinctrl) != -ENODEV) {  in bcm63138_leds_create_led()
239 		dev_warn(led->cdev.dev, "Failed to select %pOF pinctrl: %ld\n",  in bcm63138_leds_create_led()
243 	bit = BIT(led->pin);  in bcm63138_leds_create_led()
244 	bcm63138_leds_update_bits(leds, BCM63138_PARALLEL_LED_POLARITY, bit,  in bcm63138_leds_create_led()
245 				  led->active_low ? 0 : bit);  in bcm63138_leds_create_led()
246 	bcm63138_leds_update_bits(leds, BCM63138_HW_LED_EN, bit, 0);  in bcm63138_leds_create_led()
247 	bcm63138_leds_set_flash_rate(leds, led, 0);  in bcm63138_leds_create_led()
248 	bcm63138_leds_enable_led(leds, led, led->cdev.brightness);  in bcm63138_leds_create_led()
258 	struct device_node *np = dev_of_node(&pdev->dev);  in bcm63138_leds_probe()
259 	struct device *dev = &pdev->dev;  in bcm63138_leds_probe()
260 	struct bcm63138_leds *leds;  in bcm63138_leds_probe()  local
263 	leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);  in bcm63138_leds_probe()
264 	if (!leds)  in bcm63138_leds_probe()
265 		return -ENOMEM;  in bcm63138_leds_probe()
267 	leds->dev = dev;  in bcm63138_leds_probe()
269 	leds->base = devm_platform_ioremap_resource(pdev, 0);  in bcm63138_leds_probe()
270 	if (IS_ERR(leds->base))  in bcm63138_leds_probe()
271 		return PTR_ERR(leds->base);  in bcm63138_leds_probe()
273 	spin_lock_init(&leds->lock);  in bcm63138_leds_probe()
276 	if (!of_property_read_u32(np, "brcm,serial-shift-bits", &shift_bits)) {  in bcm63138_leds_probe()
277 		bcm63138_leds_write(leds, BCM63138_SERIAL_LED_SHIFT_SEL,  in bcm63138_leds_probe()
278 				    GENMASK(shift_bits - 1, 0));  in bcm63138_leds_probe()
281 	bcm63138_leds_write(leds, BCM63138_GLB_CTRL,  in bcm63138_leds_probe()
284 	bcm63138_leds_write(leds, BCM63138_HW_LED_EN, 0);  in bcm63138_leds_probe()
285 	bcm63138_leds_write(leds, BCM63138_SERIAL_LED_POLARITY, 0);  in bcm63138_leds_probe()
286 	bcm63138_leds_write(leds, BCM63138_PARALLEL_LED_POLARITY, 0);  in bcm63138_leds_probe()
289 		bcm63138_leds_create_led(leds, child);  in bcm63138_leds_probe()
296 	{ .compatible = "brcm,bcm63138-leds", },
303 		.name = "leds-bcm63xxx",