v4.19.13 snapshot.
diff --git a/drivers/rtc/rtc-da9063.c b/drivers/rtc/rtc-da9063.c
new file mode 100644
index 0000000..b4e054c
--- /dev/null
+++ b/drivers/rtc/rtc-da9063.c
@@ -0,0 +1,508 @@
+/* rtc-da9063.c - Real time clock device driver for DA9063
+ * Copyright (C) 2013-2015 Dialog Semiconductor Ltd.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/rtc.h>
+#include <linux/slab.h>
+
+#include <linux/mfd/da9062/registers.h>
+#include <linux/mfd/da9063/registers.h>
+#include <linux/mfd/da9063/core.h>
+
+#define YEARS_TO_DA9063(year) ((year) - 100)
+#define MONTHS_TO_DA9063(month) ((month) + 1)
+#define YEARS_FROM_DA9063(year) ((year) + 100)
+#define MONTHS_FROM_DA9063(month) ((month) - 1)
+
+enum {
+ RTC_SEC = 0,
+ RTC_MIN = 1,
+ RTC_HOUR = 2,
+ RTC_DAY = 3,
+ RTC_MONTH = 4,
+ RTC_YEAR = 5,
+ RTC_DATA_LEN
+};
+
+struct da9063_compatible_rtc_regmap {
+ /* REGS */
+ int rtc_enable_reg;
+ int rtc_enable_32k_crystal_reg;
+ int rtc_alarm_secs_reg;
+ int rtc_alarm_year_reg;
+ int rtc_count_secs_reg;
+ int rtc_count_year_reg;
+ int rtc_event_reg;
+ /* MASKS */
+ int rtc_enable_mask;
+ int rtc_crystal_mask;
+ int rtc_event_alarm_mask;
+ int rtc_alarm_on_mask;
+ int rtc_alarm_status_mask;
+ int rtc_tick_on_mask;
+ int rtc_ready_to_read_mask;
+ int rtc_count_sec_mask;
+ int rtc_count_min_mask;
+ int rtc_count_hour_mask;
+ int rtc_count_day_mask;
+ int rtc_count_month_mask;
+ int rtc_count_year_mask;
+ /* ALARM CONFIG */
+ int rtc_data_start;
+ int rtc_alarm_len;
+};
+
+struct da9063_compatible_rtc {
+ struct rtc_device *rtc_dev;
+ struct rtc_time alarm_time;
+ struct regmap *regmap;
+ const struct da9063_compatible_rtc_regmap *config;
+ bool rtc_sync;
+};
+
+static const struct da9063_compatible_rtc_regmap da9063_ad_regs = {
+ /* REGS */
+ .rtc_enable_reg = DA9063_REG_CONTROL_E,
+ .rtc_alarm_secs_reg = DA9063_AD_REG_ALARM_MI,
+ .rtc_alarm_year_reg = DA9063_AD_REG_ALARM_Y,
+ .rtc_count_secs_reg = DA9063_REG_COUNT_S,
+ .rtc_count_year_reg = DA9063_REG_COUNT_Y,
+ .rtc_event_reg = DA9063_REG_EVENT_A,
+ /* MASKS */
+ .rtc_enable_mask = DA9063_RTC_EN,
+ .rtc_crystal_mask = DA9063_CRYSTAL,
+ .rtc_enable_32k_crystal_reg = DA9063_REG_EN_32K,
+ .rtc_event_alarm_mask = DA9063_E_ALARM,
+ .rtc_alarm_on_mask = DA9063_ALARM_ON,
+ .rtc_alarm_status_mask = DA9063_ALARM_STATUS_ALARM |
+ DA9063_ALARM_STATUS_TICK,
+ .rtc_tick_on_mask = DA9063_TICK_ON,
+ .rtc_ready_to_read_mask = DA9063_RTC_READ,
+ .rtc_count_sec_mask = DA9063_COUNT_SEC_MASK,
+ .rtc_count_min_mask = DA9063_COUNT_MIN_MASK,
+ .rtc_count_hour_mask = DA9063_COUNT_HOUR_MASK,
+ .rtc_count_day_mask = DA9063_COUNT_DAY_MASK,
+ .rtc_count_month_mask = DA9063_COUNT_MONTH_MASK,
+ .rtc_count_year_mask = DA9063_COUNT_YEAR_MASK,
+ /* ALARM CONFIG */
+ .rtc_data_start = RTC_MIN,
+ .rtc_alarm_len = RTC_DATA_LEN - 1,
+};
+
+static const struct da9063_compatible_rtc_regmap da9063_bb_regs = {
+ /* REGS */
+ .rtc_enable_reg = DA9063_REG_CONTROL_E,
+ .rtc_alarm_secs_reg = DA9063_BB_REG_ALARM_S,
+ .rtc_alarm_year_reg = DA9063_BB_REG_ALARM_Y,
+ .rtc_count_secs_reg = DA9063_REG_COUNT_S,
+ .rtc_count_year_reg = DA9063_REG_COUNT_Y,
+ .rtc_event_reg = DA9063_REG_EVENT_A,
+ /* MASKS */
+ .rtc_enable_mask = DA9063_RTC_EN,
+ .rtc_crystal_mask = DA9063_CRYSTAL,
+ .rtc_enable_32k_crystal_reg = DA9063_REG_EN_32K,
+ .rtc_event_alarm_mask = DA9063_E_ALARM,
+ .rtc_alarm_on_mask = DA9063_ALARM_ON,
+ .rtc_alarm_status_mask = DA9063_ALARM_STATUS_ALARM |
+ DA9063_ALARM_STATUS_TICK,
+ .rtc_tick_on_mask = DA9063_TICK_ON,
+ .rtc_ready_to_read_mask = DA9063_RTC_READ,
+ .rtc_count_sec_mask = DA9063_COUNT_SEC_MASK,
+ .rtc_count_min_mask = DA9063_COUNT_MIN_MASK,
+ .rtc_count_hour_mask = DA9063_COUNT_HOUR_MASK,
+ .rtc_count_day_mask = DA9063_COUNT_DAY_MASK,
+ .rtc_count_month_mask = DA9063_COUNT_MONTH_MASK,
+ .rtc_count_year_mask = DA9063_COUNT_YEAR_MASK,
+ /* ALARM CONFIG */
+ .rtc_data_start = RTC_SEC,
+ .rtc_alarm_len = RTC_DATA_LEN,
+};
+
+static const struct da9063_compatible_rtc_regmap da9062_aa_regs = {
+ /* REGS */
+ .rtc_enable_reg = DA9062AA_CONTROL_E,
+ .rtc_alarm_secs_reg = DA9062AA_ALARM_S,
+ .rtc_alarm_year_reg = DA9062AA_ALARM_Y,
+ .rtc_count_secs_reg = DA9062AA_COUNT_S,
+ .rtc_count_year_reg = DA9062AA_COUNT_Y,
+ .rtc_event_reg = DA9062AA_EVENT_A,
+ /* MASKS */
+ .rtc_enable_mask = DA9062AA_RTC_EN_MASK,
+ .rtc_crystal_mask = DA9062AA_CRYSTAL_MASK,
+ .rtc_enable_32k_crystal_reg = DA9062AA_EN_32K,
+ .rtc_event_alarm_mask = DA9062AA_M_ALARM_MASK,
+ .rtc_alarm_on_mask = DA9062AA_ALARM_ON_MASK,
+ .rtc_alarm_status_mask = (0x02 << 6),
+ .rtc_tick_on_mask = DA9062AA_TICK_ON_MASK,
+ .rtc_ready_to_read_mask = DA9062AA_RTC_READ_MASK,
+ .rtc_count_sec_mask = DA9062AA_COUNT_SEC_MASK,
+ .rtc_count_min_mask = DA9062AA_COUNT_MIN_MASK,
+ .rtc_count_hour_mask = DA9062AA_COUNT_HOUR_MASK,
+ .rtc_count_day_mask = DA9062AA_COUNT_DAY_MASK,
+ .rtc_count_month_mask = DA9062AA_COUNT_MONTH_MASK,
+ .rtc_count_year_mask = DA9062AA_COUNT_YEAR_MASK,
+ /* ALARM CONFIG */
+ .rtc_data_start = RTC_SEC,
+ .rtc_alarm_len = RTC_DATA_LEN,
+};
+
+static const struct of_device_id da9063_compatible_reg_id_table[] = {
+ { .compatible = "dlg,da9063-rtc", .data = &da9063_bb_regs },
+ { .compatible = "dlg,da9062-rtc", .data = &da9062_aa_regs },
+ { },
+};
+MODULE_DEVICE_TABLE(of, da9063_compatible_reg_id_table);
+
+static void da9063_data_to_tm(u8 *data, struct rtc_time *tm,
+ struct da9063_compatible_rtc *rtc)
+{
+ const struct da9063_compatible_rtc_regmap *config = rtc->config;
+
+ tm->tm_sec = data[RTC_SEC] & config->rtc_count_sec_mask;
+ tm->tm_min = data[RTC_MIN] & config->rtc_count_min_mask;
+ tm->tm_hour = data[RTC_HOUR] & config->rtc_count_hour_mask;
+ tm->tm_mday = data[RTC_DAY] & config->rtc_count_day_mask;
+ tm->tm_mon = MONTHS_FROM_DA9063(data[RTC_MONTH] &
+ config->rtc_count_month_mask);
+ tm->tm_year = YEARS_FROM_DA9063(data[RTC_YEAR] &
+ config->rtc_count_year_mask);
+}
+
+static void da9063_tm_to_data(struct rtc_time *tm, u8 *data,
+ struct da9063_compatible_rtc *rtc)
+{
+ const struct da9063_compatible_rtc_regmap *config = rtc->config;
+
+ data[RTC_SEC] = tm->tm_sec & config->rtc_count_sec_mask;
+ data[RTC_MIN] = tm->tm_min & config->rtc_count_min_mask;
+ data[RTC_HOUR] = tm->tm_hour & config->rtc_count_hour_mask;
+ data[RTC_DAY] = tm->tm_mday & config->rtc_count_day_mask;
+ data[RTC_MONTH] = MONTHS_TO_DA9063(tm->tm_mon) &
+ config->rtc_count_month_mask;
+ data[RTC_YEAR] = YEARS_TO_DA9063(tm->tm_year) &
+ config->rtc_count_year_mask;
+}
+
+static int da9063_rtc_stop_alarm(struct device *dev)
+{
+ struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev);
+ const struct da9063_compatible_rtc_regmap *config = rtc->config;
+
+ return regmap_update_bits(rtc->regmap,
+ config->rtc_alarm_year_reg,
+ config->rtc_alarm_on_mask,
+ 0);
+}
+
+static int da9063_rtc_start_alarm(struct device *dev)
+{
+ struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev);
+ const struct da9063_compatible_rtc_regmap *config = rtc->config;
+
+ return regmap_update_bits(rtc->regmap,
+ config->rtc_alarm_year_reg,
+ config->rtc_alarm_on_mask,
+ config->rtc_alarm_on_mask);
+}
+
+static int da9063_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev);
+ const struct da9063_compatible_rtc_regmap *config = rtc->config;
+ unsigned long tm_secs;
+ unsigned long al_secs;
+ u8 data[RTC_DATA_LEN];
+ int ret;
+
+ ret = regmap_bulk_read(rtc->regmap,
+ config->rtc_count_secs_reg,
+ data, RTC_DATA_LEN);
+ if (ret < 0) {
+ dev_err(dev, "Failed to read RTC time data: %d\n", ret);
+ return ret;
+ }
+
+ if (!(data[RTC_SEC] & config->rtc_ready_to_read_mask)) {
+ dev_dbg(dev, "RTC not yet ready to be read by the host\n");
+ return -EINVAL;
+ }
+
+ da9063_data_to_tm(data, tm, rtc);
+
+ rtc_tm_to_time(tm, &tm_secs);
+ rtc_tm_to_time(&rtc->alarm_time, &al_secs);
+
+ /* handle the rtc synchronisation delay */
+ if (rtc->rtc_sync == true && al_secs - tm_secs == 1)
+ memcpy(tm, &rtc->alarm_time, sizeof(struct rtc_time));
+ else
+ rtc->rtc_sync = false;
+
+ return 0;
+}
+
+static int da9063_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev);
+ const struct da9063_compatible_rtc_regmap *config = rtc->config;
+ u8 data[RTC_DATA_LEN];
+ int ret;
+
+ da9063_tm_to_data(tm, data, rtc);
+ ret = regmap_bulk_write(rtc->regmap,
+ config->rtc_count_secs_reg,
+ data, RTC_DATA_LEN);
+ if (ret < 0)
+ dev_err(dev, "Failed to set RTC time data: %d\n", ret);
+
+ return ret;
+}
+
+static int da9063_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev);
+ const struct da9063_compatible_rtc_regmap *config = rtc->config;
+ u8 data[RTC_DATA_LEN];
+ int ret;
+ unsigned int val;
+
+ data[RTC_SEC] = 0;
+ ret = regmap_bulk_read(rtc->regmap,
+ config->rtc_alarm_secs_reg,
+ &data[config->rtc_data_start],
+ config->rtc_alarm_len);
+ if (ret < 0)
+ return ret;
+
+ da9063_data_to_tm(data, &alrm->time, rtc);
+
+ alrm->enabled = !!(data[RTC_YEAR] & config->rtc_alarm_on_mask);
+
+ ret = regmap_read(rtc->regmap,
+ config->rtc_event_reg,
+ &val);
+ if (ret < 0)
+ return ret;
+
+ if (val & config->rtc_event_alarm_mask)
+ alrm->pending = 1;
+ else
+ alrm->pending = 0;
+
+ return 0;
+}
+
+static int da9063_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev);
+ const struct da9063_compatible_rtc_regmap *config = rtc->config;
+ u8 data[RTC_DATA_LEN];
+ int ret;
+
+ da9063_tm_to_data(&alrm->time, data, rtc);
+
+ ret = da9063_rtc_stop_alarm(dev);
+ if (ret < 0) {
+ dev_err(dev, "Failed to stop alarm: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_bulk_write(rtc->regmap,
+ config->rtc_alarm_secs_reg,
+ &data[config->rtc_data_start],
+ config->rtc_alarm_len);
+ if (ret < 0) {
+ dev_err(dev, "Failed to write alarm: %d\n", ret);
+ return ret;
+ }
+
+ da9063_data_to_tm(data, &rtc->alarm_time, rtc);
+
+ if (alrm->enabled) {
+ ret = da9063_rtc_start_alarm(dev);
+ if (ret < 0) {
+ dev_err(dev, "Failed to start alarm: %d\n", ret);
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
+static int da9063_rtc_alarm_irq_enable(struct device *dev,
+ unsigned int enabled)
+{
+ if (enabled)
+ return da9063_rtc_start_alarm(dev);
+ else
+ return da9063_rtc_stop_alarm(dev);
+}
+
+static irqreturn_t da9063_alarm_event(int irq, void *data)
+{
+ struct da9063_compatible_rtc *rtc = data;
+ const struct da9063_compatible_rtc_regmap *config = rtc->config;
+
+ regmap_update_bits(rtc->regmap,
+ config->rtc_alarm_year_reg,
+ config->rtc_alarm_on_mask,
+ 0);
+
+ rtc->rtc_sync = true;
+ rtc_update_irq(rtc->rtc_dev, 1, RTC_IRQF | RTC_AF);
+
+ return IRQ_HANDLED;
+}
+
+static const struct rtc_class_ops da9063_rtc_ops = {
+ .read_time = da9063_rtc_read_time,
+ .set_time = da9063_rtc_set_time,
+ .read_alarm = da9063_rtc_read_alarm,
+ .set_alarm = da9063_rtc_set_alarm,
+ .alarm_irq_enable = da9063_rtc_alarm_irq_enable,
+};
+
+static int da9063_rtc_probe(struct platform_device *pdev)
+{
+ struct da9063_compatible_rtc *rtc;
+ const struct da9063_compatible_rtc_regmap *config;
+ const struct of_device_id *match;
+ int irq_alarm;
+ u8 data[RTC_DATA_LEN];
+ int ret;
+
+ if (!pdev->dev.of_node)
+ return -ENXIO;
+
+ match = of_match_node(da9063_compatible_reg_id_table,
+ pdev->dev.of_node);
+
+ rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
+ if (!rtc)
+ return -ENOMEM;
+
+ rtc->config = match->data;
+ if (of_device_is_compatible(pdev->dev.of_node, "dlg,da9063-rtc")) {
+ struct da9063 *chip = dev_get_drvdata(pdev->dev.parent);
+
+ if (chip->variant_code == PMIC_DA9063_AD)
+ rtc->config = &da9063_ad_regs;
+ }
+
+ rtc->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!rtc->regmap) {
+ dev_warn(&pdev->dev, "Parent regmap unavailable.\n");
+ return -ENXIO;
+ }
+
+ config = rtc->config;
+ ret = regmap_update_bits(rtc->regmap,
+ config->rtc_enable_reg,
+ config->rtc_enable_mask,
+ config->rtc_enable_mask);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to enable RTC\n");
+ return ret;
+ }
+
+ ret = regmap_update_bits(rtc->regmap,
+ config->rtc_enable_32k_crystal_reg,
+ config->rtc_crystal_mask,
+ config->rtc_crystal_mask);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to run 32kHz oscillator\n");
+ return ret;
+ }
+
+ ret = regmap_update_bits(rtc->regmap,
+ config->rtc_alarm_secs_reg,
+ config->rtc_alarm_status_mask,
+ 0);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to access RTC alarm register\n");
+ return ret;
+ }
+
+ ret = regmap_update_bits(rtc->regmap,
+ config->rtc_alarm_secs_reg,
+ DA9063_ALARM_STATUS_ALARM,
+ DA9063_ALARM_STATUS_ALARM);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to access RTC alarm register\n");
+ return ret;
+ }
+
+ ret = regmap_update_bits(rtc->regmap,
+ config->rtc_alarm_year_reg,
+ config->rtc_tick_on_mask,
+ 0);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to disable TICKs\n");
+ return ret;
+ }
+
+ data[RTC_SEC] = 0;
+ ret = regmap_bulk_read(rtc->regmap,
+ config->rtc_alarm_secs_reg,
+ &data[config->rtc_data_start],
+ config->rtc_alarm_len);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to read initial alarm data: %d\n",
+ ret);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, rtc);
+
+ rtc->rtc_dev = devm_rtc_device_register(&pdev->dev, DA9063_DRVNAME_RTC,
+ &da9063_rtc_ops, THIS_MODULE);
+ if (IS_ERR(rtc->rtc_dev))
+ return PTR_ERR(rtc->rtc_dev);
+
+ da9063_data_to_tm(data, &rtc->alarm_time, rtc);
+ rtc->rtc_sync = false;
+
+ irq_alarm = platform_get_irq_byname(pdev, "ALARM");
+ ret = devm_request_threaded_irq(&pdev->dev, irq_alarm, NULL,
+ da9063_alarm_event,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ "ALARM", rtc);
+ if (ret)
+ dev_err(&pdev->dev, "Failed to request ALARM IRQ %d: %d\n",
+ irq_alarm, ret);
+
+ return ret;
+}
+
+static struct platform_driver da9063_rtc_driver = {
+ .probe = da9063_rtc_probe,
+ .driver = {
+ .name = DA9063_DRVNAME_RTC,
+ .of_match_table = da9063_compatible_reg_id_table,
+ },
+};
+
+module_platform_driver(da9063_rtc_driver);
+
+MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>");
+MODULE_DESCRIPTION("Real time clock device driver for Dialog DA9063");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DA9063_DRVNAME_RTC);