rtc: bd70528: add BD71828 support
ROHM BD71828 PMIC RTC block is from many parts similar to one on BD70528. Support BD71828 RTC using BD70528 RTC driver and avoid re-inventing the wheel. Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Matti Vaittinen
Lee Jones
Родитель
6c883472e1
Коммит
fe5a591b78
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@ -498,12 +498,13 @@ config RTC_DRV_M41T80_WDT
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help
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If you say Y here you will get support for the
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watchdog timer in the ST M41T60 and M41T80 RTC chips series.
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config RTC_DRV_BD70528
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tristate "ROHM BD70528 PMIC RTC"
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depends on MFD_ROHM_BD70528 && (BD70528_WATCHDOG || !BD70528_WATCHDOG)
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help
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If you say Y here you will get support for the RTC
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on ROHM BD70528 Power Management IC.
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block on ROHM BD70528 and BD71828 Power Management IC.
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This driver can also be built as a module. If so, the module
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will be called rtc-bd70528.
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@ -6,6 +6,7 @@
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#include <linux/bcd.h>
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#include <linux/mfd/rohm-bd70528.h>
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#include <linux/mfd/rohm-bd71828.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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@ -15,7 +16,7 @@
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/*
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* We read regs RTC_SEC => RTC_YEAR
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* this struct is ordered according to chip registers.
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* Keep it u8 only to avoid padding issues.
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* Keep it u8 only (or packed) to avoid padding issues.
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*/
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struct bd70528_rtc_day {
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u8 sec;
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@ -36,6 +37,13 @@ struct bd70528_rtc_wake {
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u8 ctrl;
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} __packed;
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struct bd71828_rtc_alm {
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struct bd70528_rtc_data alm0;
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struct bd70528_rtc_data alm1;
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u8 alm_mask;
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u8 alm1_mask;
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} __packed;
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struct bd70528_rtc_alm {
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struct bd70528_rtc_data data;
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u8 alm_mask;
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@ -43,8 +51,10 @@ struct bd70528_rtc_alm {
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} __packed;
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struct bd70528_rtc {
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struct rohm_regmap_dev *mfd;
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struct rohm_regmap_dev *parent;
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struct device *dev;
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u8 reg_time_start;
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bool has_rtc_timers;
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};
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static int bd70528_set_wake(struct rohm_regmap_dev *bd70528,
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@ -123,14 +133,14 @@ static int bd70528_set_rtc_based_timers(struct bd70528_rtc *r, int new_state,
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{
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int ret;
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ret = bd70528_wdt_set(r->mfd, new_state & BD70528_WDT_STATE_BIT,
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ret = bd70528_wdt_set(r->parent, new_state & BD70528_WDT_STATE_BIT,
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old_state);
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if (ret) {
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dev_err(r->dev,
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"Failed to disable WDG for RTC setting (%d)\n", ret);
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return ret;
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}
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ret = bd70528_set_elapsed_tmr(r->mfd,
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ret = bd70528_set_elapsed_tmr(r->parent,
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new_state & BD70528_ELAPSED_STATE_BIT,
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old_state);
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if (ret) {
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@ -138,7 +148,7 @@ static int bd70528_set_rtc_based_timers(struct bd70528_rtc *r, int new_state,
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"Failed to disable 'elapsed timer' for RTC setting\n");
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return ret;
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}
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ret = bd70528_set_wake(r->mfd, new_state & BD70528_WAKE_STATE_BIT,
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ret = bd70528_set_wake(r->parent, new_state & BD70528_WAKE_STATE_BIT,
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old_state);
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if (ret) {
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dev_err(r->dev,
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@ -152,12 +162,18 @@ static int bd70528_set_rtc_based_timers(struct bd70528_rtc *r, int new_state,
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static int bd70528_re_enable_rtc_based_timers(struct bd70528_rtc *r,
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int old_state)
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{
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if (!r->has_rtc_timers)
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return 0;
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return bd70528_set_rtc_based_timers(r, old_state, NULL);
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}
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static int bd70528_disable_rtc_based_timers(struct bd70528_rtc *r,
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int *old_state)
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{
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if (!r->has_rtc_timers)
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return 0;
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return bd70528_set_rtc_based_timers(r, 0, old_state);
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}
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@ -213,22 +229,52 @@ static inline void rtc2tm(struct bd70528_rtc_data *r, struct rtc_time *t)
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t->tm_wday = bcd2bin(r->week & BD70528_MASK_RTC_WEEK);
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}
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static int bd71828_set_alarm(struct device *dev, struct rtc_wkalrm *a)
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{
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int ret;
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struct bd71828_rtc_alm alm;
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struct bd70528_rtc *r = dev_get_drvdata(dev);
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struct rohm_regmap_dev *parent = r->parent;
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ret = regmap_bulk_read(parent->regmap, BD71828_REG_RTC_ALM_START,
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&alm, sizeof(alm));
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if (ret) {
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dev_err(dev, "Failed to read alarm regs\n");
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return ret;
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}
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tm2rtc(&a->time, &alm.alm0);
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if (!a->enabled)
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alm.alm_mask &= ~BD70528_MASK_ALM_EN;
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else
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alm.alm_mask |= BD70528_MASK_ALM_EN;
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ret = regmap_bulk_write(parent->regmap, BD71828_REG_RTC_ALM_START,
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&alm, sizeof(alm));
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if (ret)
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dev_err(dev, "Failed to set alarm time\n");
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return ret;
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}
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static int bd70528_set_alarm(struct device *dev, struct rtc_wkalrm *a)
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{
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struct bd70528_rtc_wake wake;
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struct bd70528_rtc_alm alm;
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int ret;
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struct bd70528_rtc *r = dev_get_drvdata(dev);
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struct rohm_regmap_dev *bd70528 = r->mfd;
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struct rohm_regmap_dev *parent = r->parent;
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ret = regmap_bulk_read(bd70528->regmap, BD70528_REG_RTC_WAKE_START,
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ret = regmap_bulk_read(parent->regmap, BD70528_REG_RTC_WAKE_START,
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&wake, sizeof(wake));
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if (ret) {
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dev_err(dev, "Failed to read wake regs\n");
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return ret;
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}
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ret = regmap_bulk_read(bd70528->regmap, BD70528_REG_RTC_ALM_START,
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ret = regmap_bulk_read(parent->regmap, BD70528_REG_RTC_ALM_START,
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&alm, sizeof(alm));
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if (ret) {
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dev_err(dev, "Failed to read alarm regs\n");
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@ -246,14 +292,14 @@ static int bd70528_set_alarm(struct device *dev, struct rtc_wkalrm *a)
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wake.ctrl &= ~BD70528_MASK_WAKE_EN;
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}
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ret = regmap_bulk_write(bd70528->regmap,
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ret = regmap_bulk_write(parent->regmap,
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BD70528_REG_RTC_WAKE_START, &wake,
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sizeof(wake));
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if (ret) {
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dev_err(dev, "Failed to set wake time\n");
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return ret;
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}
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ret = regmap_bulk_write(bd70528->regmap, BD70528_REG_RTC_ALM_START,
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ret = regmap_bulk_write(parent->regmap, BD70528_REG_RTC_ALM_START,
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&alm, sizeof(alm));
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if (ret)
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dev_err(dev, "Failed to set alarm time\n");
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@ -261,14 +307,38 @@ static int bd70528_set_alarm(struct device *dev, struct rtc_wkalrm *a)
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return ret;
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}
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static int bd71828_read_alarm(struct device *dev, struct rtc_wkalrm *a)
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{
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int ret;
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struct bd71828_rtc_alm alm;
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struct bd70528_rtc *r = dev_get_drvdata(dev);
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struct rohm_regmap_dev *parent = r->parent;
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ret = regmap_bulk_read(parent->regmap, BD71828_REG_RTC_ALM_START,
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&alm, sizeof(alm));
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if (ret) {
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dev_err(dev, "Failed to read alarm regs\n");
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return ret;
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}
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rtc2tm(&alm.alm0, &a->time);
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a->time.tm_mday = -1;
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a->time.tm_mon = -1;
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a->time.tm_year = -1;
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a->enabled = !!(alm.alm_mask & BD70528_MASK_ALM_EN);
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a->pending = 0;
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return 0;
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}
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static int bd70528_read_alarm(struct device *dev, struct rtc_wkalrm *a)
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{
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struct bd70528_rtc_alm alm;
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int ret;
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struct bd70528_rtc *r = dev_get_drvdata(dev);
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struct rohm_regmap_dev *bd70528 = r->mfd;
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struct rohm_regmap_dev *parent = r->parent;
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ret = regmap_bulk_read(bd70528->regmap, BD70528_REG_RTC_ALM_START,
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ret = regmap_bulk_read(parent->regmap, BD70528_REG_RTC_ALM_START,
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&alm, sizeof(alm));
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if (ret) {
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dev_err(dev, "Failed to read alarm regs\n");
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@ -290,14 +360,14 @@ static int bd70528_set_time_locked(struct device *dev, struct rtc_time *t)
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int ret, tmpret, old_states;
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struct bd70528_rtc_data rtc_data;
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struct bd70528_rtc *r = dev_get_drvdata(dev);
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struct rohm_regmap_dev *bd70528 = r->mfd;
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struct rohm_regmap_dev *parent = r->parent;
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ret = bd70528_disable_rtc_based_timers(r, &old_states);
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if (ret)
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return ret;
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tmpret = regmap_bulk_read(bd70528->regmap,
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BD70528_REG_RTC_START, &rtc_data,
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tmpret = regmap_bulk_read(parent->regmap,
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r->reg_time_start, &rtc_data,
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sizeof(rtc_data));
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if (tmpret) {
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dev_err(dev, "Failed to read RTC time registers\n");
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@ -305,8 +375,8 @@ static int bd70528_set_time_locked(struct device *dev, struct rtc_time *t)
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}
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tm2rtc(t, &rtc_data);
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tmpret = regmap_bulk_write(bd70528->regmap,
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BD70528_REG_RTC_START, &rtc_data,
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tmpret = regmap_bulk_write(parent->regmap,
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r->reg_time_start, &rtc_data,
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sizeof(rtc_data));
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if (tmpret) {
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dev_err(dev, "Failed to set RTC time\n");
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@ -321,27 +391,32 @@ renable_out:
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return ret;
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}
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static int bd71828_set_time(struct device *dev, struct rtc_time *t)
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{
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return bd70528_set_time_locked(dev, t);
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}
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static int bd70528_set_time(struct device *dev, struct rtc_time *t)
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{
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int ret;
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struct bd70528_rtc *r = dev_get_drvdata(dev);
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bd70528_wdt_lock(r->mfd);
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bd70528_wdt_lock(r->parent);
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ret = bd70528_set_time_locked(dev, t);
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bd70528_wdt_unlock(r->mfd);
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bd70528_wdt_unlock(r->parent);
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return ret;
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}
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static int bd70528_get_time(struct device *dev, struct rtc_time *t)
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{
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struct bd70528_rtc *r = dev_get_drvdata(dev);
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struct rohm_regmap_dev *bd70528 = r->mfd;
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struct rohm_regmap_dev *parent = r->parent;
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struct bd70528_rtc_data rtc_data;
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int ret;
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/* read the RTC date and time registers all at once */
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ret = regmap_bulk_read(bd70528->regmap,
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BD70528_REG_RTC_START, &rtc_data,
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ret = regmap_bulk_read(parent->regmap,
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r->reg_time_start, &rtc_data,
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sizeof(rtc_data));
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if (ret) {
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dev_err(dev, "Failed to read RTC time (err %d)\n", ret);
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@ -362,19 +437,36 @@ static int bd70528_alm_enable(struct device *dev, unsigned int enabled)
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if (enabled)
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enableval = 0;
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bd70528_wdt_lock(r->mfd);
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ret = bd70528_set_wake(r->mfd, enabled, NULL);
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bd70528_wdt_lock(r->parent);
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ret = bd70528_set_wake(r->parent, enabled, NULL);
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if (ret) {
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dev_err(dev, "Failed to change wake state\n");
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goto out_unlock;
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}
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ret = regmap_update_bits(r->mfd->regmap, BD70528_REG_RTC_ALM_MASK,
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ret = regmap_update_bits(r->parent->regmap, BD70528_REG_RTC_ALM_MASK,
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BD70528_MASK_ALM_EN, enableval);
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if (ret)
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dev_err(dev, "Failed to change alarm state\n");
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out_unlock:
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bd70528_wdt_unlock(r->mfd);
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bd70528_wdt_unlock(r->parent);
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return ret;
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}
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static int bd71828_alm_enable(struct device *dev, unsigned int enabled)
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{
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int ret;
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struct bd70528_rtc *r = dev_get_drvdata(dev);
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unsigned int enableval = BD70528_MASK_ALM_EN;
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if (!enabled)
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enableval = 0;
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ret = regmap_update_bits(r->parent->regmap, BD71828_REG_RTC_ALM0_MASK,
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BD70528_MASK_ALM_EN, enableval);
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if (ret)
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dev_err(dev, "Failed to change alarm state\n");
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return ret;
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}
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@ -386,6 +478,14 @@ static const struct rtc_class_ops bd70528_rtc_ops = {
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.alarm_irq_enable = bd70528_alm_enable,
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};
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static const struct rtc_class_ops bd71828_rtc_ops = {
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.read_time = bd70528_get_time,
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.set_time = bd71828_set_time,
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.read_alarm = bd71828_read_alarm,
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.set_alarm = bd71828_set_alarm,
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.alarm_irq_enable = bd71828_alm_enable,
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};
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static irqreturn_t alm_hndlr(int irq, void *data)
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{
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struct rtc_device *rtc = data;
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@ -397,14 +497,19 @@ static irqreturn_t alm_hndlr(int irq, void *data)
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static int bd70528_probe(struct platform_device *pdev)
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{
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struct bd70528_rtc *bd_rtc;
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struct rohm_regmap_dev *mfd;
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const struct rtc_class_ops *rtc_ops;
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struct rohm_regmap_dev *parent;
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const char *irq_name;
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int ret;
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struct rtc_device *rtc;
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int irq;
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unsigned int hr;
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bool enable_main_irq = false;
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u8 hour_reg;
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enum rohm_chip_type chip = platform_get_device_id(pdev)->driver_data;
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mfd = dev_get_drvdata(pdev->dev.parent);
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if (!mfd) {
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parent = dev_get_drvdata(pdev->dev.parent);
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if (!parent) {
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dev_err(&pdev->dev, "No MFD driver data\n");
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return -EINVAL;
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}
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@ -412,16 +517,39 @@ static int bd70528_probe(struct platform_device *pdev)
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if (!bd_rtc)
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return -ENOMEM;
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bd_rtc->mfd = mfd;
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bd_rtc->parent = parent;
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bd_rtc->dev = &pdev->dev;
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irq = platform_get_irq_byname(pdev, "bd70528-rtc-alm");
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if (irq < 0)
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switch (chip) {
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case ROHM_CHIP_TYPE_BD70528:
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irq_name = "bd70528-rtc-alm";
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bd_rtc->has_rtc_timers = true;
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bd_rtc->reg_time_start = BD70528_REG_RTC_START;
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hour_reg = BD70528_REG_RTC_HOUR;
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enable_main_irq = true;
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rtc_ops = &bd70528_rtc_ops;
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break;
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case ROHM_CHIP_TYPE_BD71828:
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irq_name = "bd71828-rtc-alm-0";
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bd_rtc->reg_time_start = BD71828_REG_RTC_START;
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hour_reg = BD71828_REG_RTC_HOUR;
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rtc_ops = &bd71828_rtc_ops;
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break;
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default:
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dev_err(&pdev->dev, "Unknown chip\n");
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return -ENOENT;
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}
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irq = platform_get_irq_byname(pdev, irq_name);
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if (irq < 0) {
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dev_err(&pdev->dev, "Failed to get irq\n");
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return irq;
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}
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platform_set_drvdata(pdev, bd_rtc);
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ret = regmap_read(mfd->regmap, BD70528_REG_RTC_HOUR, &hr);
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ret = regmap_read(parent->regmap, hour_reg, &hr);
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if (ret) {
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dev_err(&pdev->dev, "Failed to reag RTC clock\n");
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|
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@ -431,10 +559,10 @@ static int bd70528_probe(struct platform_device *pdev)
|
|||
if (!(hr & BD70528_MASK_RTC_HOUR_24H)) {
|
||||
struct rtc_time t;
|
||||
|
||||
ret = bd70528_get_time(&pdev->dev, &t);
|
||||
ret = rtc_ops->read_time(&pdev->dev, &t);
|
||||
|
||||
if (!ret)
|
||||
ret = bd70528_set_time(&pdev->dev, &t);
|
||||
ret = rtc_ops->set_time(&pdev->dev, &t);
|
||||
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev,
|
||||
|
|
@ -454,7 +582,7 @@ static int bd70528_probe(struct platform_device *pdev)
|
|||
|
||||
rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
|
||||
rtc->range_max = RTC_TIMESTAMP_END_2099;
|
||||
rtc->ops = &bd70528_rtc_ops;
|
||||
rtc->ops = rtc_ops;
|
||||
|
||||
/* Request alarm IRQ prior to registerig the RTC */
|
||||
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, &alm_hndlr,
|
||||
|
|
@ -468,27 +596,37 @@ static int bd70528_probe(struct platform_device *pdev)
|
|||
* leave them enabled as irq-controller should disable irqs
|
||||
* from sub-registers when IRQ is disabled or freed.
|
||||
*/
|
||||
ret = regmap_update_bits(mfd->regmap,
|
||||
if (enable_main_irq) {
|
||||
ret = regmap_update_bits(parent->regmap,
|
||||
BD70528_REG_INT_MAIN_MASK,
|
||||
BD70528_INT_RTC_MASK, 0);
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "Failed to enable RTC interrupts\n");
|
||||
return ret;
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "Failed to enable RTC interrupts\n");
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
return rtc_register_device(rtc);
|
||||
}
|
||||
|
||||
static const struct platform_device_id bd718x7_rtc_id[] = {
|
||||
{ "bd70528-rtc", ROHM_CHIP_TYPE_BD70528 },
|
||||
{ "bd71828-rtc", ROHM_CHIP_TYPE_BD71828 },
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(platform, bd718x7_rtc_id);
|
||||
|
||||
static struct platform_driver bd70528_rtc = {
|
||||
.driver = {
|
||||
.name = "bd70528-rtc"
|
||||
},
|
||||
.probe = bd70528_probe,
|
||||
.id_table = bd718x7_rtc_id,
|
||||
};
|
||||
|
||||
module_platform_driver(bd70528_rtc);
|
||||
|
||||
MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
|
||||
MODULE_DESCRIPTION("BD70528 RTC driver");
|
||||
MODULE_DESCRIPTION("ROHM BD70528 and BD71828 PMIC RTC driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS("platform:bd70528-rtc");
|
||||
|
|
|
|||
|
|
@ -7,6 +7,7 @@
|
|||
#include <linux/bits.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/mfd/rohm-generic.h>
|
||||
#include <linux/mfd/rohm-shared.h>
|
||||
#include <linux/regmap.h>
|
||||
|
||||
enum {
|
||||
|
|
@ -307,17 +308,6 @@ enum {
|
|||
|
||||
/* RTC masks to mask out reserved bits */
|
||||
|
||||
#define BD70528_MASK_RTC_SEC 0x7f
|
||||
#define BD70528_MASK_RTC_MINUTE 0x7f
|
||||
#define BD70528_MASK_RTC_HOUR_24H 0x80
|
||||
#define BD70528_MASK_RTC_HOUR_PM 0x20
|
||||
#define BD70528_MASK_RTC_HOUR 0x3f
|
||||
#define BD70528_MASK_RTC_DAY 0x3f
|
||||
#define BD70528_MASK_RTC_WEEK 0x07
|
||||
#define BD70528_MASK_RTC_MONTH 0x1f
|
||||
#define BD70528_MASK_RTC_YEAR 0xff
|
||||
#define BD70528_MASK_RTC_COUNT_L 0x7f
|
||||
|
||||
#define BD70528_MASK_ELAPSED_TIMER_EN 0x1
|
||||
/* Mask second, min and hour fields
|
||||
* HW would support ALM irq for over 24h
|
||||
|
|
@ -326,7 +316,6 @@ enum {
|
|||
* wake-up we limit ALM to 24H and only
|
||||
* unmask sec, min and hour
|
||||
*/
|
||||
#define BD70528_MASK_ALM_EN 0x7
|
||||
#define BD70528_MASK_WAKE_EN 0x1
|
||||
|
||||
/* WDT masks */
|
||||
|
|
|
|||
|
|
@ -5,6 +5,7 @@
|
|||
#define __LINUX_MFD_BD71828_H__
|
||||
|
||||
#include <linux/mfd/rohm-generic.h>
|
||||
#include <linux/mfd/rohm-shared.h>
|
||||
|
||||
/* Regulator IDs */
|
||||
enum {
|
||||
|
|
@ -160,6 +161,7 @@ enum {
|
|||
#define BD71828_REG_RTC_YEAR 0x52
|
||||
|
||||
#define BD71828_REG_RTC_ALM0_SEC 0x53
|
||||
#define BD71828_REG_RTC_ALM_START BD71828_REG_RTC_ALM0_SEC
|
||||
#define BD71828_REG_RTC_ALM0_MINUTE 0x54
|
||||
#define BD71828_REG_RTC_ALM0_HOUR 0x55
|
||||
#define BD71828_REG_RTC_ALM0_WEEK 0x56
|
||||
|
|
@ -178,6 +180,7 @@ enum {
|
|||
#define BD71828_REG_RTC_ALM1_MASK 0x62
|
||||
|
||||
#define BD71828_REG_RTC_ALM2 0x63
|
||||
#define BD71828_REG_RTC_START BD71828_REG_RTC_SEC
|
||||
|
||||
/* Charger/Battey */
|
||||
#define BD71828_REG_CHG_STATE 0x65
|
||||
|
|
@ -204,7 +207,6 @@ enum {
|
|||
#define BD71828_REG_INT_MASK_TEMP 0xdd
|
||||
#define BD71828_REG_INT_MASK_RTC 0xde
|
||||
|
||||
|
||||
#define BD71828_REG_INT_MAIN 0xdf
|
||||
#define BD71828_REG_INT_BUCK 0xe0
|
||||
#define BD71828_REG_INT_DCIN1 0xe1
|
||||
|
|
|
|||
|
|
@ -0,0 +1,21 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||||
/* Copyright (C) 2020 ROHM Semiconductors */
|
||||
|
||||
|
||||
#ifndef __LINUX_MFD_ROHM_SHARED_H__
|
||||
#define __LINUX_MFD_ROHM_SHARED_H__
|
||||
|
||||
/* RTC definitions shared between BD70528 and BD71828 */
|
||||
|
||||
#define BD70528_MASK_RTC_SEC 0x7f
|
||||
#define BD70528_MASK_RTC_MINUTE 0x7f
|
||||
#define BD70528_MASK_RTC_HOUR_24H 0x80
|
||||
#define BD70528_MASK_RTC_HOUR_PM 0x20
|
||||
#define BD70528_MASK_RTC_HOUR 0x3f
|
||||
#define BD70528_MASK_RTC_DAY 0x3f
|
||||
#define BD70528_MASK_RTC_WEEK 0x07
|
||||
#define BD70528_MASK_RTC_MONTH 0x1f
|
||||
#define BD70528_MASK_RTC_YEAR 0xff
|
||||
#define BD70528_MASK_ALM_EN 0x7
|
||||
|
||||
#endif /* __LINUX_MFD_ROHM_SHARED_H__ */
|
||||
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