Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * lm3533-bl.c -- LM3533 Backlight driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2011-2012 Texas Instruments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Author: Johan Hovold <jhovold@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/backlight.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/fb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/mfd/lm3533.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #define LM3533_HVCTRLBANK_COUNT		2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #define LM3533_BL_MAX_BRIGHTNESS	255
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define LM3533_REG_CTRLBANK_AB_BCONF	0x1a
^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 lm3533_bl {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	struct lm3533 *lm3533;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	struct lm3533_ctrlbank cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	struct backlight_device *bd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	int id;
^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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) static inline int lm3533_bl_get_ctrlbank_id(struct lm3533_bl *bl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	return bl->id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) static int lm3533_bl_update_status(struct backlight_device *bd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	struct lm3533_bl *bl = bl_get_data(bd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	return lm3533_ctrlbank_set_brightness(&bl->cb, backlight_get_brightness(bd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) static int lm3533_bl_get_brightness(struct backlight_device *bd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	struct lm3533_bl *bl = bl_get_data(bd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	u8 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	ret = lm3533_ctrlbank_get_brightness(&bl->cb, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	return val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) static const struct backlight_ops lm3533_bl_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	.get_brightness	= lm3533_bl_get_brightness,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	.update_status	= lm3533_bl_update_status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) static ssize_t show_id(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 				struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	struct lm3533_bl *bl = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	return scnprintf(buf, PAGE_SIZE, "%d\n", bl->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) static ssize_t show_als_channel(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 				struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	struct lm3533_bl *bl = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	unsigned channel = lm3533_bl_get_ctrlbank_id(bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	return scnprintf(buf, PAGE_SIZE, "%u\n", channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) static ssize_t show_als_en(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 				struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	struct lm3533_bl *bl = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	u8 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	u8 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	bool enable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	mask = 1 << (2 * ctrlbank);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	enable = val & mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	return scnprintf(buf, PAGE_SIZE, "%d\n", enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static ssize_t store_als_en(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 					struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 					const char *buf, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	struct lm3533_bl *bl = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	int enable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	u8 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	u8 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	if (kstrtoint(buf, 0, &enable))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	mask = 1 << (2 * ctrlbank);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	if (enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		val = mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 									mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static ssize_t show_linear(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 				struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	struct lm3533_bl *bl = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	u8 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	u8 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	int linear;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	if (val & mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		linear = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		linear = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	return scnprintf(buf, PAGE_SIZE, "%x\n", linear);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) static ssize_t store_linear(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 					struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 					const char *buf, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	struct lm3533_bl *bl = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	unsigned long linear;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	u8 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	u8 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	if (kstrtoul(buf, 0, &linear))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	if (linear)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		val = mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 									mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) static ssize_t show_pwm(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 					struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 					char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	struct lm3533_bl *bl = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	u8 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	ret = lm3533_ctrlbank_get_pwm(&bl->cb, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	return scnprintf(buf, PAGE_SIZE, "%u\n", val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) static ssize_t store_pwm(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 					struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 					const char *buf, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	struct lm3533_bl *bl = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	u8 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	if (kstrtou8(buf, 0, &val))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	ret = lm3533_ctrlbank_set_pwm(&bl->cb, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) static LM3533_ATTR_RO(als_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) static LM3533_ATTR_RW(als_en);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static LM3533_ATTR_RO(id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) static LM3533_ATTR_RW(linear);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) static LM3533_ATTR_RW(pwm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) static struct attribute *lm3533_bl_attributes[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	&dev_attr_als_channel.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	&dev_attr_als_en.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	&dev_attr_id.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	&dev_attr_linear.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	&dev_attr_pwm.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) static umode_t lm3533_bl_attr_is_visible(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 					     struct attribute *attr, int n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	struct device *dev = kobj_to_dev(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	struct lm3533_bl *bl = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	umode_t mode = attr->mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	if (attr == &dev_attr_als_channel.attr ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 					attr == &dev_attr_als_en.attr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		if (!bl->lm3533->have_als)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 			mode = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	return mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) static struct attribute_group lm3533_bl_attribute_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	.is_visible	= lm3533_bl_attr_is_visible,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	.attrs		= lm3533_bl_attributes
^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 lm3533_bl_setup(struct lm3533_bl *bl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 					struct lm3533_bl_platform_data *pdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	ret = lm3533_ctrlbank_set_max_current(&bl->cb, pdata->max_current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	return lm3533_ctrlbank_set_pwm(&bl->cb, pdata->pwm);
^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) static int lm3533_bl_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	struct lm3533 *lm3533;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	struct lm3533_bl_platform_data *pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	struct lm3533_bl *bl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	struct backlight_device *bd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	struct backlight_properties props;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	dev_dbg(&pdev->dev, "%s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	lm3533 = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	if (!lm3533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	pdata = dev_get_platdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	if (!pdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		dev_err(&pdev->dev, "no platform data\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	if (pdev->id < 0 || pdev->id >= LM3533_HVCTRLBANK_COUNT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		dev_err(&pdev->dev, "illegal backlight id %d\n", pdev->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	bl = devm_kzalloc(&pdev->dev, sizeof(*bl), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	if (!bl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	bl->lm3533 = lm3533;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	bl->id = pdev->id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	bl->cb.lm3533 = lm3533;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	bl->cb.id = lm3533_bl_get_ctrlbank_id(bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	bl->cb.dev = NULL;			/* until registered */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	memset(&props, 0, sizeof(props));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	props.type = BACKLIGHT_RAW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	props.max_brightness = LM3533_BL_MAX_BRIGHTNESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	props.brightness = pdata->default_brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	bd = devm_backlight_device_register(&pdev->dev, pdata->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 					pdev->dev.parent, bl, &lm3533_bl_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 					&props);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	if (IS_ERR(bd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 		dev_err(&pdev->dev, "failed to register backlight device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		return PTR_ERR(bd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	bl->bd = bd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	bl->cb.dev = &bl->bd->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	platform_set_drvdata(pdev, bl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	ret = sysfs_create_group(&bd->dev.kobj, &lm3533_bl_attribute_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 		dev_err(&pdev->dev, "failed to create sysfs attributes\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	backlight_update_status(bd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	ret = lm3533_bl_setup(bl, pdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 		goto err_sysfs_remove;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	ret = lm3533_ctrlbank_enable(&bl->cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 		goto err_sysfs_remove;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) err_sysfs_remove:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) static int lm3533_bl_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	struct lm3533_bl *bl = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	struct backlight_device *bd = bl->bd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	dev_dbg(&bd->dev, "%s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	bd->props.power = FB_BLANK_POWERDOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	bd->props.brightness = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	lm3533_ctrlbank_disable(&bl->cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) #ifdef CONFIG_PM_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) static int lm3533_bl_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	struct lm3533_bl *bl = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	dev_dbg(dev, "%s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	return lm3533_ctrlbank_disable(&bl->cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) static int lm3533_bl_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	struct lm3533_bl *bl = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	dev_dbg(dev, "%s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	return lm3533_ctrlbank_enable(&bl->cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) static SIMPLE_DEV_PM_OPS(lm3533_bl_pm_ops, lm3533_bl_suspend, lm3533_bl_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) static void lm3533_bl_shutdown(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 	struct lm3533_bl *bl = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	dev_dbg(&pdev->dev, "%s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	lm3533_ctrlbank_disable(&bl->cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) static struct platform_driver lm3533_bl_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 		.name	= "lm3533-backlight",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 		.pm	= &lm3533_bl_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	.probe		= lm3533_bl_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	.remove		= lm3533_bl_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 	.shutdown	= lm3533_bl_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) module_platform_driver(lm3533_bl_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) MODULE_DESCRIPTION("LM3533 Backlight driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) MODULE_ALIAS("platform:lm3533-backlight");