Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * AS3711 PMIC backlight driver, using DCDC Step Up Converters
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2012 Renesas Electronics Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Author: Guennadi Liakhovetski, <g.liakhovetski@gmx.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/backlight.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/fb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/mfd/as3711.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) enum as3711_bl_type {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	AS3711_BL_SU1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	AS3711_BL_SU2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) struct as3711_bl_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	bool powered;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	enum as3711_bl_type type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	int brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	struct backlight_device *bl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) struct as3711_bl_supply {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	struct as3711_bl_data su1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	struct as3711_bl_data su2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	const struct as3711_bl_pdata *pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	struct as3711 *as3711;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) static struct as3711_bl_supply *to_supply(struct as3711_bl_data *su)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	switch (su->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	case AS3711_BL_SU1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		return container_of(su, struct as3711_bl_supply, su1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	case AS3711_BL_SU2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		return container_of(su, struct as3711_bl_supply, su2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) static int as3711_set_brightness_auto_i(struct as3711_bl_data *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 					unsigned int brightness)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	struct as3711_bl_supply *supply = to_supply(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	struct as3711 *as3711 = supply->as3711;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	const struct as3711_bl_pdata *pdata = supply->pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	/* Only all equal current values are supported */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	if (pdata->su2_auto_curr1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		ret = regmap_write(as3711->regmap, AS3711_CURR1_VALUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 				   brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	if (!ret && pdata->su2_auto_curr2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		ret = regmap_write(as3711->regmap, AS3711_CURR2_VALUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 				   brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	if (!ret && pdata->su2_auto_curr3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		ret = regmap_write(as3711->regmap, AS3711_CURR3_VALUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 				   brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) static int as3711_set_brightness_v(struct as3711 *as3711,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 				   unsigned int brightness,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 				   unsigned int reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	if (brightness > 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	return regmap_update_bits(as3711->regmap, reg, 0xf0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 				  brightness << 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) static int as3711_bl_su2_reset(struct as3711_bl_supply *supply)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	struct as3711 *as3711 = supply->as3711;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	int ret = regmap_update_bits(as3711->regmap, AS3711_STEPUP_CONTROL_5,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 				     3, supply->pdata->su2_fbprot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		ret = regmap_update_bits(as3711->regmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 					 AS3711_STEPUP_CONTROL_2, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		ret = regmap_update_bits(as3711->regmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 					 AS3711_STEPUP_CONTROL_2, 1, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99)  * Someone with less fragile or less expensive hardware could try to simplify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)  * the brightness adjustment procedure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static int as3711_bl_update_status(struct backlight_device *bl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	struct as3711_bl_data *data = bl_get_data(bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	struct as3711_bl_supply *supply = to_supply(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	struct as3711 *as3711 = supply->as3711;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	int brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	brightness = backlight_get_brightness(bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	if (data->type == AS3711_BL_SU1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		ret = as3711_set_brightness_v(as3711, brightness,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 					      AS3711_STEPUP_CONTROL_1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		const struct as3711_bl_pdata *pdata = supply->pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		switch (pdata->su2_feedback) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		case AS3711_SU2_VOLTAGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 			ret = as3711_set_brightness_v(as3711, brightness,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 						      AS3711_STEPUP_CONTROL_2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		case AS3711_SU2_CURR_AUTO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 			ret = as3711_set_brightness_auto_i(data, brightness / 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 			if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 				return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 			if (brightness) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 				ret = as3711_bl_su2_reset(supply);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 				if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 					return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 				udelay(500);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 				ret = as3711_set_brightness_auto_i(data, brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 			} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 				ret = regmap_update_bits(as3711->regmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 						AS3711_STEPUP_CONTROL_2, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		/* Manual one current feedback pin below */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		case AS3711_SU2_CURR1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 			ret = regmap_write(as3711->regmap, AS3711_CURR1_VALUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 					   brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		case AS3711_SU2_CURR2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 			ret = regmap_write(as3711->regmap, AS3711_CURR2_VALUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 					   brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		case AS3711_SU2_CURR3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 			ret = regmap_write(as3711->regmap, AS3711_CURR3_VALUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 					   brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 			ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		data->brightness = brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static int as3711_bl_get_brightness(struct backlight_device *bl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	struct as3711_bl_data *data = bl_get_data(bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	return data->brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static const struct backlight_ops as3711_bl_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	.update_status	= as3711_bl_update_status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	.get_brightness	= as3711_bl_get_brightness,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) static int as3711_bl_init_su2(struct as3711_bl_supply *supply)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	struct as3711 *as3711 = supply->as3711;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	const struct as3711_bl_pdata *pdata = supply->pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	u8 ctl = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	dev_dbg(as3711->dev, "%s(): use %u\n", __func__, pdata->su2_feedback);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	/* Turn SU2 off */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	ret = regmap_write(as3711->regmap, AS3711_STEPUP_CONTROL_2, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	switch (pdata->su2_feedback) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	case AS3711_SU2_VOLTAGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		ret = regmap_update_bits(as3711->regmap, AS3711_STEPUP_CONTROL_4, 3, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	case AS3711_SU2_CURR1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		ctl = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		ret = regmap_update_bits(as3711->regmap, AS3711_STEPUP_CONTROL_4, 3, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	case AS3711_SU2_CURR2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		ctl = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		ret = regmap_update_bits(as3711->regmap, AS3711_STEPUP_CONTROL_4, 3, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	case AS3711_SU2_CURR3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		ctl = 0x10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		ret = regmap_update_bits(as3711->regmap, AS3711_STEPUP_CONTROL_4, 3, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	case AS3711_SU2_CURR_AUTO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		if (pdata->su2_auto_curr1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 			ctl = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		if (pdata->su2_auto_curr2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 			ctl |= 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		if (pdata->su2_auto_curr3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 			ctl |= 0x20;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		ret = regmap_write(as3711->regmap, AS3711_CURR_CONTROL, ctl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) static int as3711_bl_register(struct platform_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 			      unsigned int max_brightness, struct as3711_bl_data *su)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	struct backlight_properties props = {.type = BACKLIGHT_RAW,};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	struct backlight_device *bl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	/* max tuning I = 31uA for voltage- and 38250uA for current-feedback */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	props.max_brightness = max_brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	bl = devm_backlight_device_register(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 				       su->type == AS3711_BL_SU1 ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 				       "as3711-su1" : "as3711-su2",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 				       &pdev->dev, su,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 				       &as3711_bl_ops, &props);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	if (IS_ERR(bl)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		dev_err(&pdev->dev, "failed to register backlight\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		return PTR_ERR(bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	bl->props.brightness = props.max_brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	backlight_update_status(bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	su->bl = bl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) static int as3711_backlight_parse_dt(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	struct as3711_bl_pdata *pdata = dev_get_platdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	struct device_node *bl, *fb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	bl = of_get_child_by_name(dev->parent->of_node, "backlight");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	if (!bl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 		dev_dbg(dev, "backlight node not found\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	fb = of_parse_phandle(bl, "su1-dev", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	if (fb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		of_node_put(fb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		pdata->su1_fb = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		ret = of_property_read_u32(bl, "su1-max-uA", &pdata->su1_max_uA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		if (pdata->su1_max_uA <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 			ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 			goto err_put_bl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	fb = of_parse_phandle(bl, "su2-dev", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	if (fb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		int count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		of_node_put(fb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		pdata->su2_fb = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		ret = of_property_read_u32(bl, "su2-max-uA", &pdata->su2_max_uA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		if (pdata->su2_max_uA <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 			ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 			goto err_put_bl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		if (of_find_property(bl, "su2-feedback-voltage", NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 			pdata->su2_feedback = AS3711_SU2_VOLTAGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 			count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		if (of_find_property(bl, "su2-feedback-curr1", NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 			pdata->su2_feedback = AS3711_SU2_CURR1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 			count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 		if (of_find_property(bl, "su2-feedback-curr2", NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 			pdata->su2_feedback = AS3711_SU2_CURR2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 			count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		if (of_find_property(bl, "su2-feedback-curr3", NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 			pdata->su2_feedback = AS3711_SU2_CURR3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 			count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 		if (of_find_property(bl, "su2-feedback-curr-auto", NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 			pdata->su2_feedback = AS3711_SU2_CURR_AUTO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 			count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		if (count != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 			ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 			goto err_put_bl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 		count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 		if (of_find_property(bl, "su2-fbprot-lx-sd4", NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 			pdata->su2_fbprot = AS3711_SU2_LX_SD4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 			count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 		if (of_find_property(bl, "su2-fbprot-gpio2", NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 			pdata->su2_fbprot = AS3711_SU2_GPIO2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 			count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 		if (of_find_property(bl, "su2-fbprot-gpio3", NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 			pdata->su2_fbprot = AS3711_SU2_GPIO3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 			count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 		if (of_find_property(bl, "su2-fbprot-gpio4", NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 			pdata->su2_fbprot = AS3711_SU2_GPIO4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 			count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 		if (count != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 			ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 			goto err_put_bl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 		count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 		if (of_find_property(bl, "su2-auto-curr1", NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 			pdata->su2_auto_curr1 = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 			count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		if (of_find_property(bl, "su2-auto-curr2", NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 			pdata->su2_auto_curr2 = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 			count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 		if (of_find_property(bl, "su2-auto-curr3", NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 			pdata->su2_auto_curr3 = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 			count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 		 * At least one su2-auto-curr* must be specified iff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 		 * AS3711_SU2_CURR_AUTO is used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 		if (!count ^ (pdata->su2_feedback != AS3711_SU2_CURR_AUTO)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 			ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 			goto err_put_bl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	of_node_put(bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) err_put_bl:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	of_node_put(bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) static int as3711_backlight_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	struct as3711_bl_pdata *pdata = dev_get_platdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	struct as3711 *as3711 = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	struct as3711_bl_supply *supply;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	struct as3711_bl_data *su;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 	unsigned int max_brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	if (!pdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 		dev_err(&pdev->dev, "No platform data, exiting...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	if (pdev->dev.parent->of_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 		ret = as3711_backlight_parse_dt(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 		if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 			dev_err(&pdev->dev, "DT parsing failed: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	if (!pdata->su1_fb && !pdata->su2_fb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 		dev_err(&pdev->dev, "No framebuffer specified\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 	 * Due to possible hardware damage I chose to block all modes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 	 * unsupported on my hardware. Anyone, wishing to use any of those modes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 	 * will have to first review the code, then activate and test it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 	if (pdata->su1_fb ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 	    pdata->su2_fbprot != AS3711_SU2_GPIO4 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 	    pdata->su2_feedback != AS3711_SU2_CURR_AUTO) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 		dev_warn(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 			 "Attention! An untested mode has been chosen!\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 			 "Please, review the code, enable, test, and report success:-)\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 	supply = devm_kzalloc(&pdev->dev, sizeof(*supply), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 	if (!supply)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 	supply->as3711 = as3711;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 	supply->pdata = pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 	if (pdata->su1_fb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 		su = &supply->su1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 		su->type = AS3711_BL_SU1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 		max_brightness = min(pdata->su1_max_uA, 31);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 		ret = as3711_bl_register(pdev, max_brightness, su);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 	if (pdata->su2_fb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 		su = &supply->su2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 		su->type = AS3711_BL_SU2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 		switch (pdata->su2_fbprot) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 		case AS3711_SU2_GPIO2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 		case AS3711_SU2_GPIO3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 		case AS3711_SU2_GPIO4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 		case AS3711_SU2_LX_SD4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 		default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 		switch (pdata->su2_feedback) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 		case AS3711_SU2_VOLTAGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 			max_brightness = min(pdata->su2_max_uA, 31);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 		case AS3711_SU2_CURR1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 		case AS3711_SU2_CURR2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 		case AS3711_SU2_CURR3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 		case AS3711_SU2_CURR_AUTO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 			max_brightness = min(pdata->su2_max_uA / 150, 255);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 		default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 		ret = as3711_bl_init_su2(supply);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) 		ret = as3711_bl_register(pdev, max_brightness, su);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 	platform_set_drvdata(pdev, supply);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) static struct platform_driver as3711_backlight_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 	.driver		= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 		.name	= "as3711-backlight",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) 	.probe		= as3711_backlight_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) module_platform_driver(as3711_backlight_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) MODULE_DESCRIPTION("Backlight Driver for AS3711 PMICs");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) MODULE_ALIAS("platform:as3711-backlight");