| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Alexandre Belloni | 958 | 45.25% | 5 | 71.43% |
| Eric Nelson | 855 | 40.39% | 1 | 14.29% |
| Biju Das | 304 | 14.36% | 1 | 14.29% |
| Total | 2117 | 7 |
/* * drivers/rtc/rtc-pcf85363.c * * Driver for NXP PCF85363 real-time clock. * * Copyright (C) 2017 Eric Nelson * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * Based loosely on rtc-8583 by Russell King, Wolfram Sang and Juergen Beisert */ #include <linux/module.h> #include <linux/i2c.h> #include <linux/slab.h> #include <linux/rtc.h> #include <linux/init.h> #include <linux/err.h> #include <linux/errno.h> #include <linux/bcd.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/regmap.h> /* * Date/Time registers */ #define DT_100THS 0x00 #define DT_SECS 0x01 #define DT_MINUTES 0x02 #define DT_HOURS 0x03 #define DT_DAYS 0x04 #define DT_WEEKDAYS 0x05 #define DT_MONTHS 0x06 #define DT_YEARS 0x07 /* * Alarm registers */ #define DT_SECOND_ALM1 0x08 #define DT_MINUTE_ALM1 0x09 #define DT_HOUR_ALM1 0x0a #define DT_DAY_ALM1 0x0b #define DT_MONTH_ALM1 0x0c #define DT_MINUTE_ALM2 0x0d #define DT_HOUR_ALM2 0x0e #define DT_WEEKDAY_ALM2 0x0f #define DT_ALARM_EN 0x10 /* * Time stamp registers */ #define DT_TIMESTAMP1 0x11 #define DT_TIMESTAMP2 0x17 #define DT_TIMESTAMP3 0x1d #define DT_TS_MODE 0x23 /* * control registers */ #define CTRL_OFFSET 0x24 #define CTRL_OSCILLATOR 0x25 #define CTRL_BATTERY 0x26 #define CTRL_PIN_IO 0x27 #define CTRL_FUNCTION 0x28 #define CTRL_INTA_EN 0x29 #define CTRL_INTB_EN 0x2a #define CTRL_FLAGS 0x2b #define CTRL_RAMBYTE 0x2c #define CTRL_WDOG 0x2d #define CTRL_STOP_EN 0x2e #define CTRL_RESETS 0x2f #define CTRL_RAM 0x40 #define ALRM_SEC_A1E BIT(0) #define ALRM_MIN_A1E BIT(1) #define ALRM_HR_A1E BIT(2) #define ALRM_DAY_A1E BIT(3) #define ALRM_MON_A1E BIT(4) #define ALRM_MIN_A2E BIT(5) #define ALRM_HR_A2E BIT(6) #define ALRM_DAY_A2E BIT(7) #define INT_WDIE BIT(0) #define INT_BSIE BIT(1) #define INT_TSRIE BIT(2) #define INT_A2IE BIT(3) #define INT_A1IE BIT(4) #define INT_OIE BIT(5) #define INT_PIE BIT(6) #define INT_ILP BIT(7) #define FLAGS_TSR1F BIT(0) #define FLAGS_TSR2F BIT(1) #define FLAGS_TSR3F BIT(2) #define FLAGS_BSF BIT(3) #define FLAGS_WDF BIT(4) #define FLAGS_A1F BIT(5) #define FLAGS_A2F BIT(6) #define FLAGS_PIF BIT(7) #define PIN_IO_INTAPM GENMASK(1, 0) #define PIN_IO_INTA_CLK 0 #define PIN_IO_INTA_BAT 1 #define PIN_IO_INTA_OUT 2 #define PIN_IO_INTA_HIZ 3 #define STOP_EN_STOP BIT(0) #define RESET_CPR 0xa4 #define NVRAM_SIZE 0x40 static struct i2c_driver pcf85363_driver; struct pcf85363 { struct device *dev; struct rtc_device *rtc; struct regmap *regmap; }; struct pcf85x63_config { struct regmap_config regmap; unsigned int num_nvram; }; static int pcf85363_rtc_read_time(struct device *dev, struct rtc_time *tm) { struct pcf85363 *pcf85363 = dev_get_drvdata(dev); unsigned char buf[DT_YEARS + 1]; int ret, len = sizeof(buf); /* read the RTC date and time registers all at once */ ret = regmap_bulk_read(pcf85363->regmap, DT_100THS, buf, len); if (ret) { dev_err(dev, "%s: error %d\n", __func__, ret); return ret; } tm->tm_year = bcd2bin(buf[DT_YEARS]); /* adjust for 1900 base of rtc_time */ tm->tm_year += 100; tm->tm_wday = buf[DT_WEEKDAYS] & 7; buf[DT_SECS] &= 0x7F; tm->tm_sec = bcd2bin(buf[DT_SECS]); buf[DT_MINUTES] &= 0x7F; tm->tm_min = bcd2bin(buf[DT_MINUTES]); tm->tm_hour = bcd2bin(buf[DT_HOURS]); tm->tm_mday = bcd2bin(buf[DT_DAYS]); tm->tm_mon = bcd2bin(buf[DT_MONTHS]) - 1; return 0; } static int pcf85363_rtc_set_time(struct device *dev, struct rtc_time *tm) { struct pcf85363 *pcf85363 = dev_get_drvdata(dev); unsigned char tmp[11]; unsigned char *buf = &tmp[2]; int ret; tmp[0] = STOP_EN_STOP; tmp[1] = RESET_CPR; buf[DT_100THS] = 0; buf[DT_SECS] = bin2bcd(tm->tm_sec); buf[DT_MINUTES] = bin2bcd(tm->tm_min); buf[DT_HOURS] = bin2bcd(tm->tm_hour); buf[DT_DAYS] = bin2bcd(tm->tm_mday); buf[DT_WEEKDAYS] = tm->tm_wday; buf[DT_MONTHS] = bin2bcd(tm->tm_mon + 1); buf[DT_YEARS] = bin2bcd(tm->tm_year % 100); ret = regmap_bulk_write(pcf85363->regmap, CTRL_STOP_EN, tmp, sizeof(tmp)); if (ret) return ret; return regmap_write(pcf85363->regmap, CTRL_STOP_EN, 0); } static int pcf85363_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) { struct pcf85363 *pcf85363 = dev_get_drvdata(dev); unsigned char buf[DT_MONTH_ALM1 - DT_SECOND_ALM1 + 1]; unsigned int val; int ret; ret = regmap_bulk_read(pcf85363->regmap, DT_SECOND_ALM1, buf, sizeof(buf)); if (ret) return ret; alrm->time.tm_sec = bcd2bin(buf[0]); alrm->time.tm_min = bcd2bin(buf[1]); alrm->time.tm_hour = bcd2bin(buf[2]); alrm->time.tm_mday = bcd2bin(buf[3]); alrm->time.tm_mon = bcd2bin(buf[4]) - 1; ret = regmap_read(pcf85363->regmap, CTRL_INTA_EN, &val); if (ret) return ret; alrm->enabled = !!(val & INT_A1IE); return 0; } static int _pcf85363_rtc_alarm_irq_enable(struct pcf85363 *pcf85363, unsigned int enabled) { unsigned int alarm_flags = ALRM_SEC_A1E | ALRM_MIN_A1E | ALRM_HR_A1E | ALRM_DAY_A1E | ALRM_MON_A1E; int ret; ret = regmap_update_bits(pcf85363->regmap, DT_ALARM_EN, alarm_flags, enabled ? alarm_flags : 0); if (ret) return ret; ret = regmap_update_bits(pcf85363->regmap, CTRL_INTA_EN, INT_A1IE, enabled ? INT_A1IE : 0); if (ret || enabled) return ret; /* clear current flags */ return regmap_update_bits(pcf85363->regmap, CTRL_FLAGS, FLAGS_A1F, 0); } static int pcf85363_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct pcf85363 *pcf85363 = dev_get_drvdata(dev); return _pcf85363_rtc_alarm_irq_enable(pcf85363, enabled); } static int pcf85363_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) { struct pcf85363 *pcf85363 = dev_get_drvdata(dev); unsigned char buf[DT_MONTH_ALM1 - DT_SECOND_ALM1 + 1]; int ret; buf[0] = bin2bcd(alrm->time.tm_sec); buf[1] = bin2bcd(alrm->time.tm_min); buf[2] = bin2bcd(alrm->time.tm_hour); buf[3] = bin2bcd(alrm->time.tm_mday); buf[4] = bin2bcd(alrm->time.tm_mon + 1); /* * Disable the alarm interrupt before changing the value to avoid * spurious interrupts */ ret = _pcf85363_rtc_alarm_irq_enable(pcf85363, 0); if (ret) return ret; ret = regmap_bulk_write(pcf85363->regmap, DT_SECOND_ALM1, buf, sizeof(buf)); if (ret) return ret; return _pcf85363_rtc_alarm_irq_enable(pcf85363, alrm->enabled); } static irqreturn_t pcf85363_rtc_handle_irq(int irq, void *dev_id) { struct pcf85363 *pcf85363 = i2c_get_clientdata(dev_id); unsigned int flags; int err; err = regmap_read(pcf85363->regmap, CTRL_FLAGS, &flags); if (err) return IRQ_NONE; if (flags & FLAGS_A1F) { rtc_update_irq(pcf85363->rtc, 1, RTC_IRQF | RTC_AF); regmap_update_bits(pcf85363->regmap, CTRL_FLAGS, FLAGS_A1F, 0); return IRQ_HANDLED; } return IRQ_NONE; } static const struct rtc_class_ops rtc_ops = { .read_time = pcf85363_rtc_read_time, .set_time = pcf85363_rtc_set_time, }; static const struct rtc_class_ops rtc_ops_alarm = { .read_time = pcf85363_rtc_read_time, .set_time = pcf85363_rtc_set_time, .read_alarm = pcf85363_rtc_read_alarm, .set_alarm = pcf85363_rtc_set_alarm, .alarm_irq_enable = pcf85363_rtc_alarm_irq_enable, }; static int pcf85363_nvram_read(void *priv, unsigned int offset, void *val, size_t bytes) { struct pcf85363 *pcf85363 = priv; return regmap_bulk_read(pcf85363->regmap, CTRL_RAM + offset, val, bytes); } static int pcf85363_nvram_write(void *priv, unsigned int offset, void *val, size_t bytes) { struct pcf85363 *pcf85363 = priv; return regmap_bulk_write(pcf85363->regmap, CTRL_RAM + offset, val, bytes); } static int pcf85x63_nvram_read(void *priv, unsigned int offset, void *val, size_t bytes) { struct pcf85363 *pcf85363 = priv; unsigned int tmp_val; int ret; ret = regmap_read(pcf85363->regmap, CTRL_RAMBYTE, &tmp_val); (*(unsigned char *) val) = (unsigned char) tmp_val; return ret; } static int pcf85x63_nvram_write(void *priv, unsigned int offset, void *val, size_t bytes) { struct pcf85363 *pcf85363 = priv; unsigned char tmp_val; tmp_val = *((unsigned char *)val); return regmap_write(pcf85363->regmap, CTRL_RAMBYTE, (unsigned int)tmp_val); } static const struct pcf85x63_config pcf_85263_config = { .regmap = { .reg_bits = 8, .val_bits = 8, .max_register = 0x2f, }, .num_nvram = 1 }; static const struct pcf85x63_config pcf_85363_config = { .regmap = { .reg_bits = 8, .val_bits = 8, .max_register = 0x7f, }, .num_nvram = 2 }; static int pcf85363_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct pcf85363 *pcf85363; const struct pcf85x63_config *config = &pcf_85363_config; const void *data = of_device_get_match_data(&client->dev); static struct nvmem_config nvmem_cfg[] = { { .name = "pcf85x63-", .word_size = 1, .stride = 1, .size = 1, .reg_read = pcf85x63_nvram_read, .reg_write = pcf85x63_nvram_write, }, { .name = "pcf85363-", .word_size = 1, .stride = 1, .size = NVRAM_SIZE, .reg_read = pcf85363_nvram_read, .reg_write = pcf85363_nvram_write, }, }; int ret, i; if (data) config = data; if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) return -ENODEV; pcf85363 = devm_kzalloc(&client->dev, sizeof(struct pcf85363), GFP_KERNEL); if (!pcf85363) return -ENOMEM; pcf85363->regmap = devm_regmap_init_i2c(client, &config->regmap); if (IS_ERR(pcf85363->regmap)) { dev_err(&client->dev, "regmap allocation failed\n"); return PTR_ERR(pcf85363->regmap); } pcf85363->dev = &client->dev; i2c_set_clientdata(client, pcf85363); pcf85363->rtc = devm_rtc_allocate_device(pcf85363->dev); if (IS_ERR(pcf85363->rtc)) return PTR_ERR(pcf85363->rtc); pcf85363->rtc->ops = &rtc_ops; if (client->irq > 0) { regmap_write(pcf85363->regmap, CTRL_FLAGS, 0); regmap_update_bits(pcf85363->regmap, CTRL_PIN_IO, PIN_IO_INTA_OUT, PIN_IO_INTAPM); ret = devm_request_threaded_irq(pcf85363->dev, client->irq, NULL, pcf85363_rtc_handle_irq, IRQF_TRIGGER_LOW | IRQF_ONESHOT, "pcf85363", client); if (ret) dev_warn(&client->dev, "unable to request IRQ, alarms disabled\n"); else pcf85363->rtc->ops = &rtc_ops_alarm; } ret = rtc_register_device(pcf85363->rtc); for (i = 0; i < config->num_nvram; i++) { nvmem_cfg[i].priv = pcf85363; rtc_nvmem_register(pcf85363->rtc, &nvmem_cfg[i]); } return ret; } static const struct of_device_id dev_ids[] = { { .compatible = "nxp,pcf85263", .data = &pcf_85263_config }, { .compatible = "nxp,pcf85363", .data = &pcf_85363_config }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, dev_ids); static struct i2c_driver pcf85363_driver = { .driver = { .name = "pcf85363", .of_match_table = of_match_ptr(dev_ids), }, .probe = pcf85363_probe, }; module_i2c_driver(pcf85363_driver); MODULE_AUTHOR("Eric Nelson"); MODULE_DESCRIPTION("pcf85263/pcf85363 I2C RTC driver"); MODULE_LICENSE("GPL");
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