drivers/mfd/pcf50633-core.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /* NXP PCF50633 Power Management Unit (PMU) driver
  *
  * (C) 2006-2008 by Openmoko, Inc.
  * Author: Harald Welte <laforge@openmoko.org>
  * 	   Balaji Rao <balajirrao@openmoko.org>
  * All rights reserved.
  */

 #include <linux/kernel.h>
 #include <linux/device.h>
 #include <linux/sysfs.h>
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/interrupt.h>
 #include <linux/workqueue.h>
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
 #include <linux/pm.h>
 #include <linux/slab.h>
 #include <linux/regmap.h>
 #include <linux/err.h>

 #include <linux/mfd/pcf50633/core.h>

 /* Read a block of up to 32 regs  */
 int pcf50633_read_block(struct pcf50633 *pcf, u8 reg,
 					int nr_regs, u8 *data)
 {
 	int ret;

 	ret = regmap_raw_read(pcf->regmap, reg, data, nr_regs);
 	if (ret != 0)
 		return ret;

 	return nr_regs;
 }
 EXPORT_SYMBOL_GPL(pcf50633_read_block);

 /* Write a block of up to 32 regs  */
 int pcf50633_write_block(struct pcf50633 *pcf , u8 reg,
 					int nr_regs, u8 *data)
 {
 	return regmap_raw_write(pcf->regmap, reg, data, nr_regs);
 }
 EXPORT_SYMBOL_GPL(pcf50633_write_block);

 u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg)
 {
 	unsigned int val;
 	int ret;

 	ret = regmap_read(pcf->regmap, reg, &val);
 	if (ret < 0)
 		return -1;

 	return val;
 }
 EXPORT_SYMBOL_GPL(pcf50633_reg_read);

 int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val)
 {
 	return regmap_write(pcf->regmap, reg, val);
 }
 EXPORT_SYMBOL_GPL(pcf50633_reg_write);

 int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val)
 {
 	return regmap_update_bits(pcf->regmap, reg, mask, val);
 }
 EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask);

 int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val)
 {
 	return regmap_update_bits(pcf->regmap, reg, val, 0);
 }
 EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits);

 /* sysfs attributes */
 static ssize_t dump_regs_show(struct device *dev,
 			      struct device_attribute *attr, char *buf)
 {
 	struct pcf50633 *pcf = dev_get_drvdata(dev);
 	u8 dump[16];
 	int n, n1, idx = 0;
 	char *buf1 = buf;
 	static u8 address_no_read[] = { /* must be ascending */
 		PCF50633_REG_INT1,
 		PCF50633_REG_INT2,
 		PCF50633_REG_INT3,
 		PCF50633_REG_INT4,
 		PCF50633_REG_INT5,
 		0 /* terminator */
 	};

 	for (n = 0; n < 256; n += sizeof(dump)) {
 		for (n1 = 0; n1 < sizeof(dump); n1++)
 			if (n == address_no_read[idx]) {
 				idx++;
 				dump[n1] = 0x00;
 			} else
 				dump[n1] = pcf50633_reg_read(pcf, n + n1);

 		buf1 += sprintf(buf1, "%*ph\n", (int)sizeof(dump), dump);
 	}

 	return buf1 - buf;
 }
 static DEVICE_ATTR_ADMIN_RO(dump_regs);

 static ssize_t resume_reason_show(struct device *dev,
 				  struct device_attribute *attr, char *buf)
 {
 	struct pcf50633 *pcf = dev_get_drvdata(dev);
 	int n;

 	n = sprintf(buf, "%02x%02x%02x%02x%02x\n",
 				pcf->resume_reason[0],
 				pcf->resume_reason[1],
 				pcf->resume_reason[2],
 				pcf->resume_reason[3],
 				pcf->resume_reason[4]);

 	return n;
 }
 static DEVICE_ATTR_ADMIN_RO(resume_reason);

 static struct attribute *pcf_sysfs_entries[] = {
 	&dev_attr_dump_regs.attr,
 	&dev_attr_resume_reason.attr,
 	NULL,
 };

 static struct attribute_group pcf_attr_group = {
 	.name	= NULL,			/* put in device directory */
 	.attrs	= pcf_sysfs_entries,
 };

 static void
 pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
 						struct platform_device **pdev)
 {
 	int ret;

 	*pdev = platform_device_alloc(name, -1);
 	if (!*pdev) {
 		dev_err(pcf->dev, "Failed to allocate %s\n", name);
 		return;
 	}

 	(*pdev)->dev.parent = pcf->dev;

 	ret = platform_device_add(*pdev);
 	if (ret) {
 		dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret);
 		platform_device_put(*pdev);
 		*pdev = NULL;
 	}
 }

 static const struct regmap_config pcf50633_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
 };

 static int pcf50633_probe(struct i2c_client *client)
 {
 	struct pcf50633 *pcf;
 	struct platform_device *pdev;
 	struct pcf50633_platform_data *pdata = dev_get_platdata(&client->dev);
 	int i, j, ret;
 	int version, variant;

 	if (!client->irq) {
 		dev_err(&client->dev, "Missing IRQ\n");
 		return -ENOENT;
 	}

 	pcf = devm_kzalloc(&client->dev, sizeof(*pcf), GFP_KERNEL);
 	if (!pcf)
 		return -ENOMEM;

 	i2c_set_clientdata(client, pcf);
 	pcf->dev = &client->dev;
 	pcf->pdata = pdata;

 	mutex_init(&pcf->lock);

 	pcf->regmap = devm_regmap_init_i2c(client, &pcf50633_regmap_config);
 	if (IS_ERR(pcf->regmap)) {
 		ret = PTR_ERR(pcf->regmap);
 		dev_err(pcf->dev, "Failed to allocate register map: %d\n", ret);
 		return ret;
 	}

 	version = pcf50633_reg_read(pcf, 0);
 	variant = pcf50633_reg_read(pcf, 1);
 	if (version < 0 || variant < 0) {
 		dev_err(pcf->dev, "Unable to probe pcf50633\n");
 		ret = -ENODEV;
 		return ret;
 	}

 	dev_info(pcf->dev, "Probed device version %d variant %d\n",
 							version, variant);

 	pcf50633_irq_init(pcf, client->irq);

 	/* Create sub devices */
 	pcf50633_client_dev_register(pcf, "pcf50633-input", &pcf->input_pdev);
 	pcf50633_client_dev_register(pcf, "pcf50633-rtc", &pcf->rtc_pdev);
 	pcf50633_client_dev_register(pcf, "pcf50633-mbc", &pcf->mbc_pdev);
 	pcf50633_client_dev_register(pcf, "pcf50633-adc", &pcf->adc_pdev);
 	pcf50633_client_dev_register(pcf, "pcf50633-backlight", &pcf->bl_pdev);


 	for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
 		pdev = platform_device_alloc("pcf50633-regulator", i);
 		if (!pdev) {
 			ret = -ENOMEM;
 			goto err2;
 		}

 		pdev->dev.parent = pcf->dev;
 		ret = platform_device_add_data(pdev, &pdata->reg_init_data[i],
 					       sizeof(pdata->reg_init_data[i]));
 		if (ret)
 			goto err;

 		ret = platform_device_add(pdev);
 		if (ret)
 			goto err;

 		pcf->regulator_pdev[i] = pdev;
 	}

 	ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
 	if (ret)
 		dev_warn(pcf->dev, "error creating sysfs entries\n");

 	if (pdata->probe_done)
 		pdata->probe_done(pcf);

 	return 0;

 err:
 	platform_device_put(pdev);
 err2:
 	for (j = 0; j < i; j++)
 		platform_device_put(pcf->regulator_pdev[j]);

 	return ret;
 }

 static void pcf50633_remove(struct i2c_client *client)
 {
 	struct pcf50633 *pcf = i2c_get_clientdata(client);
 	int i;

 	sysfs_remove_group(&client->dev.kobj, &pcf_attr_group);
 	pcf50633_irq_free(pcf);

 	platform_device_unregister(pcf->input_pdev);
 	platform_device_unregister(pcf->rtc_pdev);
 	platform_device_unregister(pcf->mbc_pdev);
 	platform_device_unregister(pcf->adc_pdev);
 	platform_device_unregister(pcf->bl_pdev);

 	for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
 		platform_device_unregister(pcf->regulator_pdev[i]);
 }

 static const struct i2c_device_id pcf50633_id_table[] = {
 	{"pcf50633", 0x73},
 	{/* end of list */}
 };
 MODULE_DEVICE_TABLE(i2c, pcf50633_id_table);

 static struct i2c_driver pcf50633_driver = {
 	.driver = {
 		.name	= "pcf50633",
 		.pm	= pm_sleep_ptr(&pcf50633_pm),
 	},
 	.id_table = pcf50633_id_table,
 	.probe_new = pcf50633_probe,
 	.remove = pcf50633_remove,
 };

 static int __init pcf50633_init(void)
 {
 	return i2c_add_driver(&pcf50633_driver);
 }

 static void __exit pcf50633_exit(void)
 {
 	i2c_del_driver(&pcf50633_driver);
 }

 MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU");
 MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
 MODULE_LICENSE("GPL");

 subsys_initcall(pcf50633_init);
 module_exit(pcf50633_exit);
	// SPDX-License-Identifier: GPL-2.0-or-later
	/* NXP PCF50633 Power Management Unit (PMU) driver
	*
	* (C) 2006-2008 by Openmoko, Inc.
	* Author: Harald Welte <laforge@openmoko.org>
	* Balaji Rao <balajirrao@openmoko.org>
	* All rights reserved.
	*/

	#include <linux/kernel.h>
	#include <linux/device.h>
	#include <linux/sysfs.h>
	#include <linux/module.h>
	#include <linux/types.h>
	#include <linux/interrupt.h>
	#include <linux/workqueue.h>
	#include <linux/platform_device.h>
	#include <linux/i2c.h>
	#include <linux/pm.h>
	#include <linux/slab.h>
	#include <linux/regmap.h>
	#include <linux/err.h>

	#include <linux/mfd/pcf50633/core.h>

	/* Read a block of up to 32 regs */
	int pcf50633_read_block(struct pcf50633 *pcf, u8 reg,
	int nr_regs, u8 *data)
	{
	int ret;

	ret = regmap_raw_read(pcf->regmap, reg, data, nr_regs);
	if (ret != 0)
	return ret;

	return nr_regs;
	}
	EXPORT_SYMBOL_GPL(pcf50633_read_block);

	/* Write a block of up to 32 regs */
	int pcf50633_write_block(struct pcf50633 *pcf , u8 reg,
	int nr_regs, u8 *data)
	{
	return regmap_raw_write(pcf->regmap, reg, data, nr_regs);
	}
	EXPORT_SYMBOL_GPL(pcf50633_write_block);

	u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg)
	{
	unsigned int val;
	int ret;

	ret = regmap_read(pcf->regmap, reg, &val);
	if (ret < 0)
	return -1;

	return val;
	}
	EXPORT_SYMBOL_GPL(pcf50633_reg_read);

	int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val)
	{
	return regmap_write(pcf->regmap, reg, val);
	}
	EXPORT_SYMBOL_GPL(pcf50633_reg_write);

	int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val)
	{
	return regmap_update_bits(pcf->regmap, reg, mask, val);
	}
	EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask);

	int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val)
	{
	return regmap_update_bits(pcf->regmap, reg, val, 0);
	}
	EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits);

	/* sysfs attributes */
	static ssize_t dump_regs_show(struct device *dev,
	struct device_attribute attr, char buf)
	{
	struct pcf50633 *pcf = dev_get_drvdata(dev);
	u8 dump[16];
	int n, n1, idx = 0;
	char *buf1 = buf;
	static u8 address_no_read[] = { /* must be ascending */
	PCF50633_REG_INT1,
	PCF50633_REG_INT2,
	PCF50633_REG_INT3,
	PCF50633_REG_INT4,
	PCF50633_REG_INT5,
	0 /* terminator */
	};

	for (n = 0; n < 256; n += sizeof(dump)) {
	for (n1 = 0; n1 < sizeof(dump); n1++)
	if (n == address_no_read[idx]) {
	idx++;
	dump[n1] = 0x00;
	} else
	dump[n1] = pcf50633_reg_read(pcf, n + n1);

	buf1 += sprintf(buf1, "%*ph\n", (int)sizeof(dump), dump);
	}

	return buf1 - buf;
	}
	static DEVICE_ATTR_ADMIN_RO(dump_regs);

	static ssize_t resume_reason_show(struct device *dev,
	struct device_attribute attr, char buf)
	{
	struct pcf50633 *pcf = dev_get_drvdata(dev);
	int n;

	n = sprintf(buf, "%02x%02x%02x%02x%02x\n",
	pcf->resume_reason[0],
	pcf->resume_reason[1],
	pcf->resume_reason[2],
	pcf->resume_reason[3],
	pcf->resume_reason[4]);

	return n;
	}
	static DEVICE_ATTR_ADMIN_RO(resume_reason);

	static struct attribute *pcf_sysfs_entries[] = {
	&dev_attr_dump_regs.attr,
	&dev_attr_resume_reason.attr,
	NULL,
	};

	static struct attribute_group pcf_attr_group = {
	.name = NULL, /* put in device directory */
	.attrs = pcf_sysfs_entries,
	};

	static void
	pcf50633_client_dev_register(struct pcf50633 pcf, const char name,
	struct platform_device **pdev)
	{
	int ret;

	*pdev = platform_device_alloc(name, -1);
	if (!*pdev) {
	dev_err(pcf->dev, "Failed to allocate %s\n", name);
	return;
	}

	(*pdev)->dev.parent = pcf->dev;

	ret = platform_device_add(*pdev);
	if (ret) {
	dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret);
	platform_device_put(*pdev);
	*pdev = NULL;
	}
	}

	static const struct regmap_config pcf50633_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	};

	static int pcf50633_probe(struct i2c_client *client)
	{
	struct pcf50633 *pcf;
	struct platform_device *pdev;
	struct pcf50633_platform_data *pdata = dev_get_platdata(&client->dev);
	int i, j, ret;
	int version, variant;

	if (!client->irq) {
	dev_err(&client->dev, "Missing IRQ\n");
	return -ENOENT;
	}

	pcf = devm_kzalloc(&client->dev, sizeof(*pcf), GFP_KERNEL);
	if (!pcf)
	return -ENOMEM;

	i2c_set_clientdata(client, pcf);
	pcf->dev = &client->dev;
	pcf->pdata = pdata;

	mutex_init(&pcf->lock);

	pcf->regmap = devm_regmap_init_i2c(client, &pcf50633_regmap_config);
	if (IS_ERR(pcf->regmap)) {
	ret = PTR_ERR(pcf->regmap);
	dev_err(pcf->dev, "Failed to allocate register map: %d\n", ret);
	return ret;
	}

	version = pcf50633_reg_read(pcf, 0);
	variant = pcf50633_reg_read(pcf, 1);
	if (version < 0 \|\| variant < 0) {
	dev_err(pcf->dev, "Unable to probe pcf50633\n");
	ret = -ENODEV;
	return ret;
	}

	dev_info(pcf->dev, "Probed device version %d variant %d\n",
	version, variant);

	pcf50633_irq_init(pcf, client->irq);

	/* Create sub devices */
	pcf50633_client_dev_register(pcf, "pcf50633-input", &pcf->input_pdev);
	pcf50633_client_dev_register(pcf, "pcf50633-rtc", &pcf->rtc_pdev);
	pcf50633_client_dev_register(pcf, "pcf50633-mbc", &pcf->mbc_pdev);
	pcf50633_client_dev_register(pcf, "pcf50633-adc", &pcf->adc_pdev);
	pcf50633_client_dev_register(pcf, "pcf50633-backlight", &pcf->bl_pdev);


	for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
	pdev = platform_device_alloc("pcf50633-regulator", i);
	if (!pdev) {
	ret = -ENOMEM;
	goto err2;
	}

	pdev->dev.parent = pcf->dev;
	ret = platform_device_add_data(pdev, &pdata->reg_init_data[i],
	sizeof(pdata->reg_init_data[i]));
	if (ret)
	goto err;

	ret = platform_device_add(pdev);
	if (ret)
	goto err;

	pcf->regulator_pdev[i] = pdev;
	}

	ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
	if (ret)
	dev_warn(pcf->dev, "error creating sysfs entries\n");

	if (pdata->probe_done)
	pdata->probe_done(pcf);

	return 0;

	err:
	platform_device_put(pdev);
	err2:
	for (j = 0; j < i; j++)
	platform_device_put(pcf->regulator_pdev[j]);

	return ret;
	}

	static void pcf50633_remove(struct i2c_client *client)
	{
	struct pcf50633 *pcf = i2c_get_clientdata(client);
	int i;

	sysfs_remove_group(&client->dev.kobj, &pcf_attr_group);
	pcf50633_irq_free(pcf);

	platform_device_unregister(pcf->input_pdev);
	platform_device_unregister(pcf->rtc_pdev);
	platform_device_unregister(pcf->mbc_pdev);
	platform_device_unregister(pcf->adc_pdev);
	platform_device_unregister(pcf->bl_pdev);

	for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
	platform_device_unregister(pcf->regulator_pdev[i]);
	}

	static const struct i2c_device_id pcf50633_id_table[] = {
	{"pcf50633", 0x73},
	{/* end of list */}
	};
	MODULE_DEVICE_TABLE(i2c, pcf50633_id_table);

	static struct i2c_driver pcf50633_driver = {
	.driver = {
	.name = "pcf50633",
	.pm = pm_sleep_ptr(&pcf50633_pm),
	},
	.id_table = pcf50633_id_table,
	.probe_new = pcf50633_probe,
	.remove = pcf50633_remove,
	};

	static int __init pcf50633_init(void)
	{
	return i2c_add_driver(&pcf50633_driver);
	}

	static void __exit pcf50633_exit(void)
	{
	i2c_del_driver(&pcf50633_driver);
	}

	MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU");
	MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
	MODULE_LICENSE("GPL");

	subsys_initcall(pcf50633_init);
	module_exit(pcf50633_exit);