/* 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, "Falied 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);