Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *	LED driver for TI lp3952 controller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *	Copyright (C) 2016, DAQRI, LLC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *	Author: Tony Makkiel <tony.makkiel@daqri.com>
^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/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/gpio/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/leds-lp3952.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/notifier.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/reboot.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) static int lp3952_register_write(struct i2c_client *client, u8 reg, u8 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	struct lp3952_led_array *priv = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	ret = regmap_write(priv->regmap, reg, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 			__func__, reg, val, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) static void lp3952_on_off(struct lp3952_led_array *priv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 			  enum lp3952_leds led_id, bool on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	int ret, val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	dev_dbg(&priv->client->dev, "%s LED %d to %d\n", __func__, led_id, on);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	val = 1 << led_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	if (led_id == LP3952_LED_ALL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		val = LP3952_LED_MASK_ALL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	ret = regmap_update_bits(priv->regmap, LP3952_REG_LED_CTRL, val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 				 on ? val : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		dev_err(&priv->client->dev, "%s, Error %d\n", __func__, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54)  * Using Imax to control brightness. There are 4 possible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55)  * setting 25, 50, 75 and 100 % of Imax. Possible values are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56)  * values 0-4. 0 meaning turn off.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) static int lp3952_set_brightness(struct led_classdev *cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 				 enum led_brightness value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	unsigned int reg, shift_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	struct lp3952_ctrl_hdl *led = container_of(cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 						   struct lp3952_ctrl_hdl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 						   cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	struct lp3952_led_array *priv = (struct lp3952_led_array *)led->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	dev_dbg(cdev->dev, "Brightness request: %d on %d\n", value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		led->channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	if (value == LED_OFF) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		lp3952_on_off(priv, led->channel, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	if (led->channel > LP3952_RED_1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		dev_err(cdev->dev, " %s Invalid LED requested", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	if (led->channel >= LP3952_BLUE_1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		reg = LP3952_REG_RGB1_MAX_I_CTRL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		shift_val = (led->channel - LP3952_BLUE_1) * 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		reg = LP3952_REG_RGB2_MAX_I_CTRL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		shift_val = led->channel * 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	/* Enable the LED in case it is not enabled already */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	lp3952_on_off(priv, led->channel, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	return regmap_update_bits(priv->regmap, reg, 3 << shift_val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 				  --value << shift_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) static int lp3952_get_label(struct device *dev, const char *label, char *dest)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	const char *str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	ret = device_property_read_string(dev, label, &str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	strncpy(dest, str, LP3952_LABEL_MAX_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static int lp3952_register_led_classdev(struct lp3952_led_array *priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	int i, acpi_ret, ret = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	static const char *led_name_hdl[LP3952_LED_ALL] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		"blue2",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		"green2",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		"red2",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		"blue1",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		"green1",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		"red1"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	for (i = 0; i < LP3952_LED_ALL; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		acpi_ret = lp3952_get_label(&priv->client->dev, led_name_hdl[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 					    priv->leds[i].name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		if (acpi_ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		priv->leds[i].cdev.name = priv->leds[i].name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		priv->leds[i].cdev.brightness = LED_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		priv->leds[i].cdev.max_brightness = LP3952_BRIGHT_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		priv->leds[i].cdev.brightness_set_blocking =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 				lp3952_set_brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		priv->leds[i].channel = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		priv->leds[i].priv = priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		ret = devm_led_classdev_register(&priv->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 						 &priv->leds[i].cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 			dev_err(&priv->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 				"couldn't register LED %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 				priv->leds[i].cdev.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static int lp3952_set_pattern_gen_cmd(struct lp3952_led_array *priv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 				      u8 cmd_index, u8 r, u8 g, u8 b,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 				      enum lp3952_tt tt, enum lp3952_cet cet)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	struct ptrn_gen_cmd line = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 			{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 				.r = r,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 				.g = g,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 				.b = b,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 				.cet = cet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 				.tt = tt
^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) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	if (cmd_index >= LP3952_CMD_REG_COUNT)
^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) 	ret = lp3952_register_write(priv->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 				    LP3952_REG_CMD_0 + cmd_index * 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 				    line.bytes.msb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	return lp3952_register_write(priv->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 				      LP3952_REG_CMD_0 + cmd_index * 2 + 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 				      line.bytes.lsb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static int lp3952_configure(struct lp3952_led_array *priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	/* Disable any LEDs on from any previous conf. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	ret = lp3952_register_write(priv->client, LP3952_REG_LED_CTRL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	/* enable rgb patter, loop */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	ret = lp3952_register_write(priv->client, LP3952_REG_PAT_GEN_CTRL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 				    LP3952_PATRN_LOOP | LP3952_PATRN_GEN_EN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	/* Update Bit 6 (Active mode), Select both Led sets, Bit [1:0] */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	ret = lp3952_register_write(priv->client, LP3952_REG_ENABLES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 				    LP3952_ACTIVE_MODE | LP3952_INT_B00ST_LDR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	/* Set Cmd1 for RGB intensity,cmd and transition time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	return lp3952_set_pattern_gen_cmd(priv, 0, I46, I71, I100, TT0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 					   CET197);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static const struct regmap_config lp3952_regmap = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	.reg_bits = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	.val_bits = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	.max_register = REG_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	.cache_type = REGCACHE_RBTREE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static int lp3952_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 			const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	struct lp3952_led_array *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	priv->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	priv->enable_gpio = devm_gpiod_get(&client->dev, "nrst",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 					   GPIOD_OUT_HIGH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	if (IS_ERR(priv->enable_gpio)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		status = PTR_ERR(priv->enable_gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		dev_err(&client->dev, "Failed to enable gpio: %d\n", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	priv->regmap = devm_regmap_init_i2c(client, &lp3952_regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	if (IS_ERR(priv->regmap)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		int err = PTR_ERR(priv->regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		dev_err(&client->dev, "Failed to allocate register map: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 			err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	i2c_set_clientdata(client, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	status = lp3952_configure(priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	if (status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		dev_err(&client->dev, "Probe failed. Device not found (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 			status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	status = lp3952_register_led_classdev(priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	if (status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		dev_err(&client->dev, "Unable to register led_classdev: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 			status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) static int lp3952_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	struct lp3952_led_array *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	priv = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	lp3952_on_off(priv, LP3952_LED_ALL, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	gpiod_set_value(priv->enable_gpio, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) static const struct i2c_device_id lp3952_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	{LP3952_NAME, 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	{}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) MODULE_DEVICE_TABLE(i2c, lp3952_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) static struct i2c_driver lp3952_i2c_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 			.name = LP3952_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	.probe = lp3952_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	.remove = lp3952_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	.id_table = lp3952_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) module_i2c_driver(lp3952_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) MODULE_AUTHOR("Tony Makkiel <tony.makkiel@daqri.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) MODULE_DESCRIPTION("lp3952 I2C LED controller driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) MODULE_LICENSE("GPL v2");