drivers/mfd/lp3943.c

1 // SPDX-License-Identifier: GPL-2.0-only
11  *   It can be used for a GPIO expander and PWM generators.
16  *   LP3943 MFD ---- GPIO expander    leds-gpio        eg) HW enable pin
18  *               --- PWM generator    leds-pwm         eg) PWM input
20  *   Internal two PWM channels are used for LED dimming effect.
23  *   LEDs can be controlled with legacy leds-gpio(static brightness) or
24  *   leds-pwm drivers(dynamic brightness control).
25  *   Alternatively, it can be used for generic GPIO and PWM controller.
27  *   A PWM is input pin of a backlight device.
64 		.name = "lp3943-pwm",
65 		.of_compatible = "ti,lp3943-pwm",
68 		.name = "lp3943-gpio",
69 		.of_compatible = "ti,lp3943-gpio",
78 	ret = regmap_read(lp3943->regmap, reg, &val);  in lp3943_read_byte()
89 	return regmap_write(lp3943->regmap, reg, data);  in lp3943_write_byte()
95 	return regmap_update_bits(lp3943->regmap, reg, mask, data);  in lp3943_update_bits()
108 	struct device *dev = &cl->dev;  in lp3943_probe()
112 		return -ENOMEM;  in lp3943_probe()
114 	lp3943->regmap = devm_regmap_init_i2c(cl, &lp3943_regmap_config);  in lp3943_probe()
115 	if (IS_ERR(lp3943->regmap))  in lp3943_probe()
116 		return PTR_ERR(lp3943->regmap);  in lp3943_probe()
118 	lp3943->pdata = dev_get_platdata(dev);  in lp3943_probe()
119 	lp3943->dev = dev;  in lp3943_probe()
120 	lp3943->mux_cfg = lp3943_mux_cfg;  in lp3943_probe()
123 	return devm_mfd_add_devices(dev, -1, lp3943_devs,  in lp3943_probe()