// SPDX-License-Identifier: GPL-2.0 /* * RTC driver for the Micro Crystal RV3028 * * Copyright (C) 2019 Micro Crystal SA * * Alexandre Belloni <[email protected]> * */ #include <linux/clk-provider.h> #include <linux/bcd.h> #include <linux/bitfield.h> #include <linux/bitops.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/log2.h> #include <linux/module.h> #include <linux/of.h> #include <linux/regmap.h> #include <linux/rtc.h> #define RV3028_SEC … #define RV3028_MIN … #define RV3028_HOUR … #define RV3028_WDAY … #define RV3028_DAY … #define RV3028_MONTH … #define RV3028_YEAR … #define RV3028_ALARM_MIN … #define RV3028_ALARM_HOUR … #define RV3028_ALARM_DAY … #define RV3028_STATUS … #define RV3028_CTRL1 … #define RV3028_CTRL2 … #define RV3028_EVT_CTRL … #define RV3028_TS_COUNT … #define RV3028_TS_SEC … #define RV3028_RAM1 … #define RV3028_EEPROM_ADDR … #define RV3028_EEPROM_DATA … #define RV3028_EEPROM_CMD … #define RV3028_CLKOUT … #define RV3028_OFFSET … #define RV3028_BACKUP … #define RV3028_STATUS_PORF … #define RV3028_STATUS_EVF … #define RV3028_STATUS_AF … #define RV3028_STATUS_TF … #define RV3028_STATUS_UF … #define RV3028_STATUS_BSF … #define RV3028_STATUS_CLKF … #define RV3028_STATUS_EEBUSY … #define RV3028_CLKOUT_FD_MASK … #define RV3028_CLKOUT_PORIE … #define RV3028_CLKOUT_CLKSY … #define RV3028_CLKOUT_CLKOE … #define RV3028_CTRL1_EERD … #define RV3028_CTRL1_WADA … #define RV3028_CTRL2_RESET … #define RV3028_CTRL2_12_24 … #define RV3028_CTRL2_EIE … #define RV3028_CTRL2_AIE … #define RV3028_CTRL2_TIE … #define RV3028_CTRL2_UIE … #define RV3028_CTRL2_TSE … #define RV3028_EVT_CTRL_TSR … #define RV3028_EEPROM_CMD_UPDATE … #define RV3028_EEPROM_CMD_WRITE … #define RV3028_EEPROM_CMD_READ … #define RV3028_EEBUSY_POLL … #define RV3028_EEBUSY_TIMEOUT … #define RV3028_BACKUP_TCE … #define RV3028_BACKUP_TCR_MASK … #define RV3028_BACKUP_BSM … #define RV3028_BACKUP_BSM_DSM … #define RV3028_BACKUP_BSM_LSM … #define OFFSET_STEP_PPT … enum rv3028_type { … }; struct rv3028_data { … }; static u16 rv3028_trickle_resistors[] = …; static ssize_t timestamp0_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct rv3028_data *rv3028 = dev_get_drvdata(dev->parent); regmap_update_bits(rv3028->regmap, RV3028_EVT_CTRL, RV3028_EVT_CTRL_TSR, RV3028_EVT_CTRL_TSR); return count; }; static ssize_t timestamp0_show(struct device *dev, struct device_attribute *attr, char *buf) { struct rv3028_data *rv3028 = dev_get_drvdata(dev->parent); struct rtc_time tm; int ret, count; u8 date[6]; ret = regmap_read(rv3028->regmap, RV3028_TS_COUNT, &count); if (ret) return ret; if (!count) return 0; ret = regmap_bulk_read(rv3028->regmap, RV3028_TS_SEC, date, sizeof(date)); if (ret) return ret; tm.tm_sec = bcd2bin(date[0]); tm.tm_min = bcd2bin(date[1]); tm.tm_hour = bcd2bin(date[2]); tm.tm_mday = bcd2bin(date[3]); tm.tm_mon = bcd2bin(date[4]) - 1; tm.tm_year = bcd2bin(date[5]) + 100; ret = rtc_valid_tm(&tm); if (ret) return ret; return sprintf(buf, "%llu\n", (unsigned long long)rtc_tm_to_time64(&tm)); }; static DEVICE_ATTR_RW(timestamp0); static ssize_t timestamp0_count_show(struct device *dev, struct device_attribute *attr, char *buf) { struct rv3028_data *rv3028 = dev_get_drvdata(dev->parent); int ret, count; ret = regmap_read(rv3028->regmap, RV3028_TS_COUNT, &count); if (ret) return ret; return sprintf(buf, "%u\n", count); }; static DEVICE_ATTR_RO(timestamp0_count); static struct attribute *rv3028_attrs[] = …; static const struct attribute_group rv3028_attr_group = …; static int rv3028_exit_eerd(struct rv3028_data *rv3028, u32 eerd) { … } static int rv3028_enter_eerd(struct rv3028_data *rv3028, u32 *eerd) { … } static int rv3028_update_eeprom(struct rv3028_data *rv3028, u32 eerd) { … } static int rv3028_update_cfg(struct rv3028_data *rv3028, unsigned int reg, unsigned int mask, unsigned int val) { … } static irqreturn_t rv3028_handle_irq(int irq, void *dev_id) { … } static int rv3028_get_time(struct device *dev, struct rtc_time *tm) { … } static int rv3028_set_time(struct device *dev, struct rtc_time *tm) { … } static int rv3028_get_alarm(struct device *dev, struct rtc_wkalrm *alrm) { … } static int rv3028_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) { … } static int rv3028_alarm_irq_enable(struct device *dev, unsigned int enabled) { … } static int rv3028_read_offset(struct device *dev, long *offset) { … } static int rv3028_set_offset(struct device *dev, long offset) { … } static int rv3028_param_get(struct device *dev, struct rtc_param *param) { … } static int rv3028_param_set(struct device *dev, struct rtc_param *param) { … } static int rv3028_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) { … } static int rv3028_nvram_write(void *priv, unsigned int offset, void *val, size_t bytes) { … } static int rv3028_nvram_read(void *priv, unsigned int offset, void *val, size_t bytes) { … } static int rv3028_eeprom_write(void *priv, unsigned int offset, void *val, size_t bytes) { … } static int rv3028_eeprom_read(void *priv, unsigned int offset, void *val, size_t bytes) { … } #ifdef CONFIG_COMMON_CLK #define clkout_hw_to_rv3028(hw) … static int clkout_rates[] = …; static unsigned long rv3028_clkout_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { … } static long rv3028_clkout_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *prate) { … } static int rv3028_clkout_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long parent_rate) { … } static int rv3028_clkout_prepare(struct clk_hw *hw) { … } static void rv3028_clkout_unprepare(struct clk_hw *hw) { … } static int rv3028_clkout_is_prepared(struct clk_hw *hw) { … } static const struct clk_ops rv3028_clkout_ops = …; static int rv3028_clkout_register_clk(struct rv3028_data *rv3028, struct i2c_client *client) { … } #endif static const struct rtc_class_ops rv3028_rtc_ops = …; static const struct regmap_config regmap_config = …; static u8 rv3028_set_trickle_charger(struct rv3028_data *rv3028, struct i2c_client *client) { … } static int rv3028_probe(struct i2c_client *client) { … } static const struct acpi_device_id rv3028_i2c_acpi_match[] = …; MODULE_DEVICE_TABLE(acpi, rv3028_i2c_acpi_match); static const __maybe_unused struct of_device_id rv3028_of_match[] = …; MODULE_DEVICE_TABLE(of, rv3028_of_match); static const struct i2c_device_id rv3028_id_table[] = …; MODULE_DEVICE_TABLE(i2c, rv3028_id_table); static struct i2c_driver rv3028_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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