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)  * fixed.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright 2008 Wolfson Microelectronics PLC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * Copyright (c) 2009 Nokia Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * Roger Quadros <ext-roger.quadros@nokia.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * This is useful for systems with mixed controllable and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * non-controllable regulators, as well as for allowing testing on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * systems with no controllable regulators.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/regulator/driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/regulator/fixed.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/gpio/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <linux/regulator/of_regulator.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/regulator/machine.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <linux/clk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) struct fixed_voltage_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	struct regulator_desc desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	struct regulator_dev *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	struct clk *enable_clock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	unsigned int clk_enable_counter;
^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) struct fixed_dev_type {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	bool has_enable_clock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) static int reg_clock_enable(struct regulator_dev *rdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	ret = clk_prepare_enable(priv->enable_clock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	priv->clk_enable_counter++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) static int reg_clock_disable(struct regulator_dev *rdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	clk_disable_unprepare(priv->enable_clock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	priv->clk_enable_counter--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) static int reg_clock_is_enabled(struct regulator_dev *rdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	return priv->clk_enable_counter > 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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77)  * of_get_fixed_voltage_config - extract fixed_voltage_config structure info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78)  * @dev: device requesting for fixed_voltage_config
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79)  * @desc: regulator description
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81)  * Populates fixed_voltage_config structure by extracting data from device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82)  * tree node, returns a pointer to the populated structure of NULL if memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83)  * alloc fails.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) static struct fixed_voltage_config *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) of_get_fixed_voltage_config(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 			    const struct regulator_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	struct fixed_voltage_config *config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	struct device_node *np = dev->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	struct regulator_init_data *init_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	config = devm_kzalloc(dev, sizeof(struct fixed_voltage_config),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 								 GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	if (!config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	config->init_data = of_get_regulator_init_data(dev, dev->of_node, desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	if (!config->init_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	init_data = config->init_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	init_data->constraints.apply_uV = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	config->supply_name = init_data->constraints.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	if (init_data->constraints.min_uV == init_data->constraints.max_uV) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		config->microvolts = init_data->constraints.min_uV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		dev_err(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 			 "Fixed regulator specified with variable voltages\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	if (init_data->constraints.boot_on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		config->enabled_at_boot = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	of_property_read_u32(np, "startup-delay-us", &config->startup_delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	of_property_read_u32(np, "off-on-delay-us", &config->off_on_delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	if (of_find_property(np, "vin-supply", NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		config->input_supply = "vin";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	return config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static const struct regulator_ops fixed_voltage_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static const struct regulator_ops fixed_voltage_clkenabled_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	.enable = reg_clock_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	.disable = reg_clock_disable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	.is_enabled = reg_clock_is_enabled,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static int reg_fixed_voltage_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	struct fixed_voltage_config *config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	struct fixed_voltage_data *drvdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	const struct fixed_dev_type *drvtype = of_device_get_match_data(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	struct regulator_config cfg = { };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	enum gpiod_flags gflags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct fixed_voltage_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 			       GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	if (!drvdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	if (pdev->dev.of_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		config = of_get_fixed_voltage_config(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 						     &drvdata->desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		if (IS_ERR(config))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 			return PTR_ERR(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		config = dev_get_platdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	if (!config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	drvdata->desc.name = devm_kstrdup(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 					  config->supply_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 					  GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	if (drvdata->desc.name == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		dev_err(&pdev->dev, "Failed to allocate supply name\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	drvdata->desc.type = REGULATOR_VOLTAGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	drvdata->desc.owner = THIS_MODULE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	if (drvtype && drvtype->has_enable_clock) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		drvdata->desc.ops = &fixed_voltage_clkenabled_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		drvdata->enable_clock = devm_clk_get(dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		if (IS_ERR(drvdata->enable_clock)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 			dev_err(dev, "Can't get enable-clock from devicetree\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 			return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		drvdata->desc.ops = &fixed_voltage_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	drvdata->desc.enable_time = config->startup_delay;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	drvdata->desc.off_on_delay = config->off_on_delay;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	if (config->input_supply) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		drvdata->desc.supply_name = devm_kstrdup(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 					    config->input_supply,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 					    GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		if (!drvdata->desc.supply_name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 			dev_err(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 				"Failed to allocate input supply\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 			return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	if (config->microvolts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		drvdata->desc.n_voltages = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	drvdata->desc.fixed_uV = config->microvolts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	 * The signal will be inverted by the GPIO core if flagged so in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	 * descriptor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	if (config->enabled_at_boot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		gflags = GPIOD_OUT_HIGH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		gflags = GPIOD_OUT_LOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	 * Some fixed regulators share the enable line between two
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	 * regulators which makes it necessary to get a handle on the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	 * same descriptor for two different consumers. This will get
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	 * the GPIO descriptor, but only the first call will initialize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	 * it so any flags such as inversion or open drain will only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	 * be set up by the first caller and assumed identical on the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	 * next caller.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	 * FIXME: find a better way to deal with this.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	gflags |= GPIOD_FLAGS_BIT_NONEXCLUSIVE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	 * Do not use devm* here: the regulator core takes over the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	 * lifecycle management of the GPIO descriptor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	cfg.ena_gpiod = gpiod_get_optional(&pdev->dev, NULL, gflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	if (IS_ERR(cfg.ena_gpiod))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		return PTR_ERR(cfg.ena_gpiod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	cfg.dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	cfg.init_data = config->init_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	cfg.driver_data = drvdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	cfg.of_node = pdev->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	drvdata->dev = devm_regulator_register(&pdev->dev, &drvdata->desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 					       &cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	if (IS_ERR(drvdata->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		ret = PTR_ERR(drvdata->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	platform_set_drvdata(pdev, drvdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	dev_dbg(&pdev->dev, "%s supplying %duV\n", drvdata->desc.name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		drvdata->desc.fixed_uV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) #if defined(CONFIG_OF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static const struct fixed_dev_type fixed_voltage_data = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	.has_enable_clock = false,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) static const struct fixed_dev_type fixed_clkenable_data = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	.has_enable_clock = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) static const struct of_device_id fixed_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		.compatible = "regulator-fixed",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		.data = &fixed_voltage_data,
^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) 		.compatible = "regulator-fixed-clock",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		.data = &fixed_clkenable_data,
^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) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) MODULE_DEVICE_TABLE(of, fixed_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) static struct platform_driver regulator_fixed_voltage_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	.probe		= reg_fixed_voltage_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	.driver		= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		.name		= "reg-fixed-voltage",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		.of_match_table = of_match_ptr(fixed_of_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) static int __init regulator_fixed_voltage_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	return platform_driver_register(&regulator_fixed_voltage_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) subsys_initcall(regulator_fixed_voltage_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) static void __exit regulator_fixed_voltage_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	platform_driver_unregister(&regulator_fixed_voltage_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) module_exit(regulator_fixed_voltage_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) MODULE_DESCRIPTION("Fixed voltage regulator");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) MODULE_ALIAS("platform:reg-fixed-voltage");