1 // SPDX-License-Identifier: GPL-2.0
12 #include <linux/leds-ti-lmu-common.h>
22 	struct regmap *regmap = lmu_bank->regmap;  in ti_lmu_common_update_brightness()
33 	if (lmu_bank->max_brightness == MAX_BRIGHTNESS_11BIT) {  in ti_lmu_common_update_brightness()
34 		reg = lmu_bank->lsb_brightness_reg;  in ti_lmu_common_update_brightness()
46 	reg = lmu_bank->msb_brightness_reg;  in ti_lmu_common_update_brightness()
65 	if (usec > ramp_table[size - 1])  in ti_lmu_common_convert_ramp_to_index()
66 		return size - 1;  in ti_lmu_common_convert_ramp_to_index()
72 		/* Find an approximate index by looking up the table */  in ti_lmu_common_convert_ramp_to_index()
73 		if (usec > ramp_table[i - 1] && usec < ramp_table[i]) {  in ti_lmu_common_convert_ramp_to_index()
74 			if (usec - ramp_table[i - 1] < ramp_table[i] - usec)  in ti_lmu_common_convert_ramp_to_index()
75 				return i - 1;  in ti_lmu_common_convert_ramp_to_index()
86 	struct regmap *regmap = lmu_bank->regmap;  in ti_lmu_common_set_ramp()
87 	u8 ramp, ramp_up, ramp_down;  in ti_lmu_common_set_ramp()  local
89 	if (lmu_bank->ramp_up_usec == 0 && lmu_bank->ramp_down_usec == 0) {  in ti_lmu_common_set_ramp()
93 		ramp_up = ti_lmu_common_convert_ramp_to_index(lmu_bank->ramp_up_usec);  in ti_lmu_common_set_ramp()
94 		ramp_down = ti_lmu_common_convert_ramp_to_index(lmu_bank->ramp_down_usec);  in ti_lmu_common_set_ramp()
97 	ramp = (ramp_up << 4) | ramp_down;  in ti_lmu_common_set_ramp()
99 	return regmap_write(regmap, lmu_bank->runtime_ramp_reg, ramp);  in ti_lmu_common_set_ramp()
110 	ret = fwnode_property_read_u32(child, "ramp-up-us",  in ti_lmu_common_get_ramp_params()
111 				 &lmu_data->ramp_up_usec);  in ti_lmu_common_get_ramp_params()
113 		dev_warn(dev, "ramp-up-us property missing\n");  in ti_lmu_common_get_ramp_params()
116 	ret = fwnode_property_read_u32(child, "ramp-down-us",  in ti_lmu_common_get_ramp_params()
117 				 &lmu_data->ramp_down_usec);  in ti_lmu_common_get_ramp_params()
119 		dev_warn(dev, "ramp-down-us property missing\n");  in ti_lmu_common_get_ramp_params()
130 	ret = device_property_read_u32(dev, "ti,brightness-resolution",  in ti_lmu_common_get_brt_res()
131 				       &lmu_data->max_brightness);  in ti_lmu_common_get_brt_res()
134 					       "ti,brightness-resolution",  in ti_lmu_common_get_brt_res()
135 					       &lmu_data->max_brightness);  in ti_lmu_common_get_brt_res()
136 	if (lmu_data->max_brightness <= 0) {  in ti_lmu_common_get_brt_res()
137 		lmu_data->max_brightness = MAX_BRIGHTNESS_8BIT;  in ti_lmu_common_get_brt_res()
141 	if (lmu_data->max_brightness > MAX_BRIGHTNESS_11BIT)  in ti_lmu_common_get_brt_res()
142 			lmu_data->max_brightness = MAX_BRIGHTNESS_11BIT;  in ti_lmu_common_get_brt_res()
153 MODULE_ALIAS("ti-lmu-led-common");