| /* 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. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| * |
| */ |
| |
| #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 show_dump_regs(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(dump_regs, 0400, show_dump_regs, NULL); |
| |
| static ssize_t show_resume_reason(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(resume_reason, 0400, show_resume_reason, NULL); |
| |
| 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; |
| } |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int pcf50633_suspend(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct pcf50633 *pcf = i2c_get_clientdata(client); |
| |
| return pcf50633_irq_suspend(pcf); |
| } |
| |
| static int pcf50633_resume(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct pcf50633 *pcf = i2c_get_clientdata(client); |
| |
| return pcf50633_irq_resume(pcf); |
| } |
| #endif |
| |
| static SIMPLE_DEV_PM_OPS(pcf50633_pm, pcf50633_suspend, pcf50633_resume); |
| |
| static const struct regmap_config pcf50633_regmap_config = { |
| .reg_bits = 8, |
| .val_bits = 8, |
| }; |
| |
| static int pcf50633_probe(struct i2c_client *client, |
| const struct i2c_device_id *ids) |
| { |
| 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) |
| return -ENOMEM; |
| |
| 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); |
| for (j = 0; j < i; j++) |
| platform_device_put(pcf->regulator_pdev[j]); |
| |
| return ret; |
| } |
| |
| static int 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]); |
| |
| return 0; |
| } |
| |
| 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 = &pcf50633_pm, |
| }, |
| .id_table = pcf50633_id_table, |
| .probe = 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); |