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path: root/drivers/rtc/rtc-omap.c
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Diffstat (limited to 'drivers/rtc/rtc-omap.c')
-rw-r--r--drivers/rtc/rtc-omap.c548
1 files changed, 349 insertions, 199 deletions
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index 21142e6574a9..8e5851aa4369 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -1,10 +1,11 @@
/*
- * TI OMAP1 Real Time Clock interface for Linux
+ * TI OMAP Real Time Clock interface for Linux
*
* Copyright (C) 2003 MontaVista Software, Inc.
* Author: George G. Davis <gdavis@mvista.com> or <source@mvista.com>
*
* Copyright (C) 2006 David Brownell (new RTC framework)
+ * Copyright (C) 2014 Johan Hovold <johan@kernel.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -25,7 +26,8 @@
#include <linux/pm_runtime.h>
#include <linux/io.h>
-/* The OMAP1 RTC is a year/month/day/hours/minutes/seconds BCD clock
+/*
+ * The OMAP RTC is a year/month/day/hours/minutes/seconds BCD clock
* with century-range alarm matching, driven by the 32kHz clock.
*
* The main user-visible ways it differs from PC RTCs are by omitting
@@ -39,10 +41,6 @@
* the SoC). See the BOARD-SPECIFIC CUSTOMIZATION comment.
*/
-#define DRIVER_NAME "omap_rtc"
-
-#define OMAP_RTC_BASE 0xfffb4800
-
/* RTC registers */
#define OMAP_RTC_SECONDS_REG 0x00
#define OMAP_RTC_MINUTES_REG 0x04
@@ -72,6 +70,15 @@
#define OMAP_RTC_IRQWAKEEN 0x7c
+#define OMAP_RTC_ALARM2_SECONDS_REG 0x80
+#define OMAP_RTC_ALARM2_MINUTES_REG 0x84
+#define OMAP_RTC_ALARM2_HOURS_REG 0x88
+#define OMAP_RTC_ALARM2_DAYS_REG 0x8c
+#define OMAP_RTC_ALARM2_MONTHS_REG 0x90
+#define OMAP_RTC_ALARM2_YEARS_REG 0x94
+
+#define OMAP_RTC_PMIC_REG 0x98
+
/* OMAP_RTC_CTRL_REG bit fields: */
#define OMAP_RTC_CTRL_SPLIT BIT(7)
#define OMAP_RTC_CTRL_DISABLE BIT(6)
@@ -84,6 +91,7 @@
/* OMAP_RTC_STATUS_REG bit fields: */
#define OMAP_RTC_STATUS_POWER_UP BIT(7)
+#define OMAP_RTC_STATUS_ALARM2 BIT(7)
#define OMAP_RTC_STATUS_ALARM BIT(6)
#define OMAP_RTC_STATUS_1D_EVENT BIT(5)
#define OMAP_RTC_STATUS_1H_EVENT BIT(4)
@@ -93,6 +101,7 @@
#define OMAP_RTC_STATUS_BUSY BIT(0)
/* OMAP_RTC_INTERRUPTS_REG bit fields: */
+#define OMAP_RTC_INTERRUPTS_IT_ALARM2 BIT(4)
#define OMAP_RTC_INTERRUPTS_IT_ALARM BIT(3)
#define OMAP_RTC_INTERRUPTS_IT_TIMER BIT(2)
@@ -102,61 +111,82 @@
/* OMAP_RTC_IRQWAKEEN bit fields: */
#define OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN BIT(1)
+/* OMAP_RTC_PMIC bit fields: */
+#define OMAP_RTC_PMIC_POWER_EN_EN BIT(16)
+
/* OMAP_RTC_KICKER values */
#define KICK0_VALUE 0x83e70b13
#define KICK1_VALUE 0x95a4f1e0
-#define OMAP_RTC_HAS_KICKER BIT(0)
-
-/*
- * Few RTC IP revisions has special WAKE-EN Register to enable Wakeup
- * generation for event Alarm.
- */
-#define OMAP_RTC_HAS_IRQWAKEEN BIT(1)
+struct omap_rtc_device_type {
+ bool has_32kclk_en;
+ bool has_kicker;
+ bool has_irqwakeen;
+ bool has_pmic_mode;
+ bool has_power_up_reset;
+};
-/*
- * Some RTC IP revisions (like those in AM335x and DRA7x) need
- * the 32KHz clock to be explicitly enabled.
- */
-#define OMAP_RTC_HAS_32KCLK_EN BIT(2)
+struct omap_rtc {
+ struct rtc_device *rtc;
+ void __iomem *base;
+ int irq_alarm;
+ int irq_timer;
+ u8 interrupts_reg;
+ bool is_pmic_controller;
+ const struct omap_rtc_device_type *type;
+};
-static void __iomem *rtc_base;
+static inline u8 rtc_read(struct omap_rtc *rtc, unsigned int reg)
+{
+ return readb(rtc->base + reg);
+}
-#define rtc_read(addr) readb(rtc_base + (addr))
-#define rtc_write(val, addr) writeb(val, rtc_base + (addr))
+static inline u32 rtc_readl(struct omap_rtc *rtc, unsigned int reg)
+{
+ return readl(rtc->base + reg);
+}
-#define rtc_writel(val, addr) writel(val, rtc_base + (addr))
+static inline void rtc_write(struct omap_rtc *rtc, unsigned int reg, u8 val)
+{
+ writeb(val, rtc->base + reg);
+}
+static inline void rtc_writel(struct omap_rtc *rtc, unsigned int reg, u32 val)
+{
+ writel(val, rtc->base + reg);
+}
-/* we rely on the rtc framework to handle locking (rtc->ops_lock),
+/*
+ * We rely on the rtc framework to handle locking (rtc->ops_lock),
* so the only other requirement is that register accesses which
* require BUSY to be clear are made with IRQs locally disabled
*/
-static void rtc_wait_not_busy(void)
+static void rtc_wait_not_busy(struct omap_rtc *rtc)
{
- int count = 0;
- u8 status;
+ int count;
+ u8 status;
/* BUSY may stay active for 1/32768 second (~30 usec) */
for (count = 0; count < 50; count++) {
- status = rtc_read(OMAP_RTC_STATUS_REG);
- if ((status & (u8)OMAP_RTC_STATUS_BUSY) == 0)
+ status = rtc_read(rtc, OMAP_RTC_STATUS_REG);
+ if (!(status & OMAP_RTC_STATUS_BUSY))
break;
udelay(1);
}
/* now we have ~15 usec to read/write various registers */
}
-static irqreturn_t rtc_irq(int irq, void *rtc)
+static irqreturn_t rtc_irq(int irq, void *dev_id)
{
- unsigned long events = 0;
- u8 irq_data;
+ struct omap_rtc *rtc = dev_id;
+ unsigned long events = 0;
+ u8 irq_data;
- irq_data = rtc_read(OMAP_RTC_STATUS_REG);
+ irq_data = rtc_read(rtc, OMAP_RTC_STATUS_REG);
/* alarm irq? */
if (irq_data & OMAP_RTC_STATUS_ALARM) {
- rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
+ rtc_write(rtc, OMAP_RTC_STATUS_REG, OMAP_RTC_STATUS_ALARM);
events |= RTC_IRQF | RTC_AF;
}
@@ -164,23 +194,21 @@ static irqreturn_t rtc_irq(int irq, void *rtc)
if (irq_data & OMAP_RTC_STATUS_1S_EVENT)
events |= RTC_IRQF | RTC_UF;
- rtc_update_irq(rtc, 1, events);
+ rtc_update_irq(rtc->rtc, 1, events);
return IRQ_HANDLED;
}
static int omap_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
+ struct omap_rtc *rtc = dev_get_drvdata(dev);
u8 reg, irqwake_reg = 0;
- struct platform_device *pdev = to_platform_device(dev);
- const struct platform_device_id *id_entry =
- platform_get_device_id(pdev);
local_irq_disable();
- rtc_wait_not_busy();
- reg = rtc_read(OMAP_RTC_INTERRUPTS_REG);
- if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
- irqwake_reg = rtc_read(OMAP_RTC_IRQWAKEEN);
+ rtc_wait_not_busy(rtc);
+ reg = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
+ if (rtc->type->has_irqwakeen)
+ irqwake_reg = rtc_read(rtc, OMAP_RTC_IRQWAKEEN);
if (enabled) {
reg |= OMAP_RTC_INTERRUPTS_IT_ALARM;
@@ -189,10 +217,10 @@ static int omap_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM;
irqwake_reg &= ~OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN;
}
- rtc_wait_not_busy();
- rtc_write(reg, OMAP_RTC_INTERRUPTS_REG);
- if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
- rtc_write(irqwake_reg, OMAP_RTC_IRQWAKEEN);
+ rtc_wait_not_busy(rtc);
+ rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, reg);
+ if (rtc->type->has_irqwakeen)
+ rtc_write(rtc, OMAP_RTC_IRQWAKEEN, irqwake_reg);
local_irq_enable();
return 0;
@@ -230,39 +258,47 @@ static void bcd2tm(struct rtc_time *tm)
tm->tm_year = bcd2bin(tm->tm_year) + 100;
}
+static void omap_rtc_read_time_raw(struct omap_rtc *rtc, struct rtc_time *tm)
+{
+ tm->tm_sec = rtc_read(rtc, OMAP_RTC_SECONDS_REG);
+ tm->tm_min = rtc_read(rtc, OMAP_RTC_MINUTES_REG);
+ tm->tm_hour = rtc_read(rtc, OMAP_RTC_HOURS_REG);
+ tm->tm_mday = rtc_read(rtc, OMAP_RTC_DAYS_REG);
+ tm->tm_mon = rtc_read(rtc, OMAP_RTC_MONTHS_REG);
+ tm->tm_year = rtc_read(rtc, OMAP_RTC_YEARS_REG);
+}
static int omap_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
+ struct omap_rtc *rtc = dev_get_drvdata(dev);
+
/* we don't report wday/yday/isdst ... */
local_irq_disable();
- rtc_wait_not_busy();
-
- tm->tm_sec = rtc_read(OMAP_RTC_SECONDS_REG);
- tm->tm_min = rtc_read(OMAP_RTC_MINUTES_REG);
- tm->tm_hour = rtc_read(OMAP_RTC_HOURS_REG);
- tm->tm_mday = rtc_read(OMAP_RTC_DAYS_REG);
- tm->tm_mon = rtc_read(OMAP_RTC_MONTHS_REG);
- tm->tm_year = rtc_read(OMAP_RTC_YEARS_REG);
-
+ rtc_wait_not_busy(rtc);
+ omap_rtc_read_time_raw(rtc, tm);
local_irq_enable();
bcd2tm(tm);
+
return 0;
}
static int omap_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
+ struct omap_rtc *rtc = dev_get_drvdata(dev);
+
if (tm2bcd(tm) < 0)
return -EINVAL;
+
local_irq_disable();
- rtc_wait_not_busy();
+ rtc_wait_not_busy(rtc);
- rtc_write(tm->tm_year, OMAP_RTC_YEARS_REG);
- rtc_write(tm->tm_mon, OMAP_RTC_MONTHS_REG);
- rtc_write(tm->tm_mday, OMAP_RTC_DAYS_REG);
- rtc_write(tm->tm_hour, OMAP_RTC_HOURS_REG);
- rtc_write(tm->tm_min, OMAP_RTC_MINUTES_REG);
- rtc_write(tm->tm_sec, OMAP_RTC_SECONDS_REG);
+ rtc_write(rtc, OMAP_RTC_YEARS_REG, tm->tm_year);
+ rtc_write(rtc, OMAP_RTC_MONTHS_REG, tm->tm_mon);
+ rtc_write(rtc, OMAP_RTC_DAYS_REG, tm->tm_mday);
+ rtc_write(rtc, OMAP_RTC_HOURS_REG, tm->tm_hour);
+ rtc_write(rtc, OMAP_RTC_MINUTES_REG, tm->tm_min);
+ rtc_write(rtc, OMAP_RTC_SECONDS_REG, tm->tm_sec);
local_irq_enable();
@@ -271,48 +307,50 @@ static int omap_rtc_set_time(struct device *dev, struct rtc_time *tm)
static int omap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
{
+ struct omap_rtc *rtc = dev_get_drvdata(dev);
+ u8 interrupts;
+
local_irq_disable();
- rtc_wait_not_busy();
+ rtc_wait_not_busy(rtc);
- alm->time.tm_sec = rtc_read(OMAP_RTC_ALARM_SECONDS_REG);
- alm->time.tm_min = rtc_read(OMAP_RTC_ALARM_MINUTES_REG);
- alm->time.tm_hour = rtc_read(OMAP_RTC_ALARM_HOURS_REG);
- alm->time.tm_mday = rtc_read(OMAP_RTC_ALARM_DAYS_REG);
- alm->time.tm_mon = rtc_read(OMAP_RTC_ALARM_MONTHS_REG);
- alm->time.tm_year = rtc_read(OMAP_RTC_ALARM_YEARS_REG);
+ alm->time.tm_sec = rtc_read(rtc, OMAP_RTC_ALARM_SECONDS_REG);
+ alm->time.tm_min = rtc_read(rtc, OMAP_RTC_ALARM_MINUTES_REG);
+ alm->time.tm_hour = rtc_read(rtc, OMAP_RTC_ALARM_HOURS_REG);
+ alm->time.tm_mday = rtc_read(rtc, OMAP_RTC_ALARM_DAYS_REG);
+ alm->time.tm_mon = rtc_read(rtc, OMAP_RTC_ALARM_MONTHS_REG);
+ alm->time.tm_year = rtc_read(rtc, OMAP_RTC_ALARM_YEARS_REG);
local_irq_enable();
bcd2tm(&alm->time);
- alm->enabled = !!(rtc_read(OMAP_RTC_INTERRUPTS_REG)
- & OMAP_RTC_INTERRUPTS_IT_ALARM);
+
+ interrupts = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
+ alm->enabled = !!(interrupts & OMAP_RTC_INTERRUPTS_IT_ALARM);
return 0;
}
static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
{
+ struct omap_rtc *rtc = dev_get_drvdata(dev);
u8 reg, irqwake_reg = 0;
- struct platform_device *pdev = to_platform_device(dev);
- const struct platform_device_id *id_entry =
- platform_get_device_id(pdev);
if (tm2bcd(&alm->time) < 0)
return -EINVAL;
local_irq_disable();
- rtc_wait_not_busy();
+ rtc_wait_not_busy(rtc);
- rtc_write(alm->time.tm_year, OMAP_RTC_ALARM_YEARS_REG);
- rtc_write(alm->time.tm_mon, OMAP_RTC_ALARM_MONTHS_REG);
- rtc_write(alm->time.tm_mday, OMAP_RTC_ALARM_DAYS_REG);
- rtc_write(alm->time.tm_hour, OMAP_RTC_ALARM_HOURS_REG);
- rtc_write(alm->time.tm_min, OMAP_RTC_ALARM_MINUTES_REG);
- rtc_write(alm->time.tm_sec, OMAP_RTC_ALARM_SECONDS_REG);
+ rtc_write(rtc, OMAP_RTC_ALARM_YEARS_REG, alm->time.tm_year);
+ rtc_write(rtc, OMAP_RTC_ALARM_MONTHS_REG, alm->time.tm_mon);
+ rtc_write(rtc, OMAP_RTC_ALARM_DAYS_REG, alm->time.tm_mday);
+ rtc_write(rtc, OMAP_RTC_ALARM_HOURS_REG, alm->time.tm_hour);
+ rtc_write(rtc, OMAP_RTC_ALARM_MINUTES_REG, alm->time.tm_min);
+ rtc_write(rtc, OMAP_RTC_ALARM_SECONDS_REG, alm->time.tm_sec);
- reg = rtc_read(OMAP_RTC_INTERRUPTS_REG);
- if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
- irqwake_reg = rtc_read(OMAP_RTC_IRQWAKEEN);
+ reg = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
+ if (rtc->type->has_irqwakeen)
+ irqwake_reg = rtc_read(rtc, OMAP_RTC_IRQWAKEEN);
if (alm->enabled) {
reg |= OMAP_RTC_INTERRUPTS_IT_ALARM;
@@ -321,15 +359,79 @@ static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM;
irqwake_reg &= ~OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN;
}
- rtc_write(reg, OMAP_RTC_INTERRUPTS_REG);
- if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
- rtc_write(irqwake_reg, OMAP_RTC_IRQWAKEEN);
+ rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, reg);
+ if (rtc->type->has_irqwakeen)
+ rtc_write(rtc, OMAP_RTC_IRQWAKEEN, irqwake_reg);
local_irq_enable();
return 0;
}
+static struct omap_rtc *omap_rtc_power_off_rtc;
+
+/*
+ * omap_rtc_poweroff: RTC-controlled power off
+ *
+ * The RTC can be used to control an external PMIC via the pmic_power_en pin,
+ * which can be configured to transition to OFF on ALARM2 events.
+ *
+ * Notes:
+ * The two-second alarm offset is the shortest offset possible as the alarm
+ * registers must be set before the next timer update and the offset
+ * calculation is too heavy for everything to be done within a single access
+ * period (~15 us).
+ *
+ * Called with local interrupts disabled.
+ */
+static void omap_rtc_power_off(void)
+{
+ struct omap_rtc *rtc = omap_rtc_power_off_rtc;
+ struct rtc_time tm;
+ unsigned long now;
+ u32 val;
+
+ /* enable pmic_power_en control */
+ val = rtc_readl(rtc, OMAP_RTC_PMIC_REG);
+ rtc_writel(rtc, OMAP_RTC_PMIC_REG, val | OMAP_RTC_PMIC_POWER_EN_EN);
+
+ /* set alarm two seconds from now */
+ omap_rtc_read_time_raw(rtc, &tm);
+ bcd2tm(&tm);
+ rtc_tm_to_time(&tm, &now);
+ rtc_time_to_tm(now + 2, &tm);
+
+ if (tm2bcd(&tm) < 0) {
+ dev_err(&rtc->rtc->dev, "power off failed\n");
+ return;
+ }
+
+ rtc_wait_not_busy(rtc);
+
+ rtc_write(rtc, OMAP_RTC_ALARM2_SECONDS_REG, tm.tm_sec);
+ rtc_write(rtc, OMAP_RTC_ALARM2_MINUTES_REG, tm.tm_min);
+ rtc_write(rtc, OMAP_RTC_ALARM2_HOURS_REG, tm.tm_hour);
+ rtc_write(rtc, OMAP_RTC_ALARM2_DAYS_REG, tm.tm_mday);
+ rtc_write(rtc, OMAP_RTC_ALARM2_MONTHS_REG, tm.tm_mon);
+ rtc_write(rtc, OMAP_RTC_ALARM2_YEARS_REG, tm.tm_year);
+
+ /*
+ * enable ALARM2 interrupt
+ *
+ * NOTE: this fails on AM3352 if rtc_write (writeb) is used
+ */
+ val = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
+ rtc_writel(rtc, OMAP_RTC_INTERRUPTS_REG,
+ val | OMAP_RTC_INTERRUPTS_IT_ALARM2);
+
+ /*
+ * Wait for alarm to trigger (within two seconds) and external PMIC to
+ * power off the system. Add a 500 ms margin for external latencies
+ * (e.g. debounce circuits).
+ */
+ mdelay(2500);
+}
+
static struct rtc_class_ops omap_rtc_ops = {
.read_time = omap_rtc_read_time,
.set_time = omap_rtc_set_time,
@@ -338,137 +440,140 @@ static struct rtc_class_ops omap_rtc_ops = {
.alarm_irq_enable = omap_rtc_alarm_irq_enable,
};
-static int omap_rtc_alarm;
-static int omap_rtc_timer;
+static const struct omap_rtc_device_type omap_rtc_default_type = {
+ .has_power_up_reset = true,
+};
-#define OMAP_RTC_DATA_AM3352_IDX 1
-#define OMAP_RTC_DATA_DA830_IDX 2
+static const struct omap_rtc_device_type omap_rtc_am3352_type = {
+ .has_32kclk_en = true,
+ .has_kicker = true,
+ .has_irqwakeen = true,
+ .has_pmic_mode = true,
+};
-static struct platform_device_id omap_rtc_devtype[] = {
+static const struct omap_rtc_device_type omap_rtc_da830_type = {
+ .has_kicker = true,
+};
+
+static const struct platform_device_id omap_rtc_id_table[] = {
{
- .name = DRIVER_NAME,
- },
- [OMAP_RTC_DATA_AM3352_IDX] = {
+ .name = "omap_rtc",
+ .driver_data = (kernel_ulong_t)&omap_rtc_default_type,
+ }, {
.name = "am3352-rtc",
- .driver_data = OMAP_RTC_HAS_KICKER | OMAP_RTC_HAS_IRQWAKEEN |
- OMAP_RTC_HAS_32KCLK_EN,
- },
- [OMAP_RTC_DATA_DA830_IDX] = {
+ .driver_data = (kernel_ulong_t)&omap_rtc_am3352_type,
+ }, {
.name = "da830-rtc",
- .driver_data = OMAP_RTC_HAS_KICKER,
- },
- {},
+ .driver_data = (kernel_ulong_t)&omap_rtc_da830_type,
+ }, {
+ /* sentinel */
+ }
};
-MODULE_DEVICE_TABLE(platform, omap_rtc_devtype);
+MODULE_DEVICE_TABLE(platform, omap_rtc_id_table);
static const struct of_device_id omap_rtc_of_match[] = {
- { .compatible = "ti,da830-rtc",
- .data = &omap_rtc_devtype[OMAP_RTC_DATA_DA830_IDX],
- },
- { .compatible = "ti,am3352-rtc",
- .data = &omap_rtc_devtype[OMAP_RTC_DATA_AM3352_IDX],
- },
- {},
+ {
+ .compatible = "ti,am3352-rtc",
+ .data = &omap_rtc_am3352_type,
+ }, {
+ .compatible = "ti,da830-rtc",
+ .data = &omap_rtc_da830_type,
+ }, {
+ /* sentinel */
+ }
};
MODULE_DEVICE_TABLE(of, omap_rtc_of_match);
static int __init omap_rtc_probe(struct platform_device *pdev)
{
- struct resource *res;
- struct rtc_device *rtc;
- u8 reg, new_ctrl;
+ struct omap_rtc *rtc;
+ struct resource *res;
+ u8 reg, mask, new_ctrl;
const struct platform_device_id *id_entry;
const struct of_device_id *of_id;
+ int ret;
- of_id = of_match_device(omap_rtc_of_match, &pdev->dev);
- if (of_id)
- pdev->id_entry = of_id->data;
+ rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
+ if (!rtc)
+ return -ENOMEM;
- id_entry = platform_get_device_id(pdev);
- if (!id_entry) {
- dev_err(&pdev->dev, "no matching device entry\n");
- return -ENODEV;
+ of_id = of_match_device(omap_rtc_of_match, &pdev->dev);
+ if (of_id) {
+ rtc->type = of_id->data;
+ rtc->is_pmic_controller = rtc->type->has_pmic_mode &&
+ of_property_read_bool(pdev->dev.of_node,
+ "system-power-controller");
+ } else {
+ id_entry = platform_get_device_id(pdev);
+ rtc->type = (void *)id_entry->driver_data;
}
- omap_rtc_timer = platform_get_irq(pdev, 0);
- if (omap_rtc_timer <= 0) {
- pr_debug("%s: no update irq?\n", pdev->name);
+ rtc->irq_timer = platform_get_irq(pdev, 0);
+ if (rtc->irq_timer <= 0)
return -ENOENT;
- }
- omap_rtc_alarm = platform_get_irq(pdev, 1);
- if (omap_rtc_alarm <= 0) {
- pr_debug("%s: no alarm irq?\n", pdev->name);
+ rtc->irq_alarm = platform_get_irq(pdev, 1);
+ if (rtc->irq_alarm <= 0)
return -ENOENT;
- }
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- rtc_base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(rtc_base))
- return PTR_ERR(rtc_base);
+ rtc->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(rtc->base))
+ return PTR_ERR(rtc->base);
+
+ platform_set_drvdata(pdev, rtc);
/* Enable the clock/module so that we can access the registers */
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
- if (id_entry->driver_data & OMAP_RTC_HAS_KICKER) {
- rtc_writel(KICK0_VALUE, OMAP_RTC_KICK0_REG);
- rtc_writel(KICK1_VALUE, OMAP_RTC_KICK1_REG);
- }
-
- rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
- &omap_rtc_ops, THIS_MODULE);
- if (IS_ERR(rtc)) {
- pr_debug("%s: can't register RTC device, err %ld\n",
- pdev->name, PTR_ERR(rtc));
- goto fail0;
+ if (rtc->type->has_kicker) {
+ rtc_writel(rtc, OMAP_RTC_KICK0_REG, KICK0_VALUE);
+ rtc_writel(rtc, OMAP_RTC_KICK1_REG, KICK1_VALUE);
}
- platform_set_drvdata(pdev, rtc);
- /* clear pending irqs, and set 1/second periodic,
- * which we'll use instead of update irqs
+ /*
+ * disable interrupts
+ *
+ * NOTE: ALARM2 is not cleared on AM3352 if rtc_write (writeb) is used
*/
- rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
+ rtc_writel(rtc, OMAP_RTC_INTERRUPTS_REG, 0);
/* enable RTC functional clock */
- if (id_entry->driver_data & OMAP_RTC_HAS_32KCLK_EN)
- rtc_writel(OMAP_RTC_OSC_32KCLK_EN, OMAP_RTC_OSC_REG);
+ if (rtc->type->has_32kclk_en) {
+ reg = rtc_read(rtc, OMAP_RTC_OSC_REG);
+ rtc_writel(rtc, OMAP_RTC_OSC_REG,
+ reg | OMAP_RTC_OSC_32KCLK_EN);
+ }
/* clear old status */
- reg = rtc_read(OMAP_RTC_STATUS_REG);
- if (reg & (u8) OMAP_RTC_STATUS_POWER_UP) {
- pr_info("%s: RTC power up reset detected\n",
- pdev->name);
- rtc_write(OMAP_RTC_STATUS_POWER_UP, OMAP_RTC_STATUS_REG);
- }
- if (reg & (u8) OMAP_RTC_STATUS_ALARM)
- rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
+ reg = rtc_read(rtc, OMAP_RTC_STATUS_REG);
- /* handle periodic and alarm irqs */
- if (devm_request_irq(&pdev->dev, omap_rtc_timer, rtc_irq, 0,
- dev_name(&rtc->dev), rtc)) {
- pr_debug("%s: RTC timer interrupt IRQ%d already claimed\n",
- pdev->name, omap_rtc_timer);
- goto fail0;
- }
- if ((omap_rtc_timer != omap_rtc_alarm) &&
- (devm_request_irq(&pdev->dev, omap_rtc_alarm, rtc_irq, 0,
- dev_name(&rtc->dev), rtc))) {
- pr_debug("%s: RTC alarm interrupt IRQ%d already claimed\n",
- pdev->name, omap_rtc_alarm);
- goto fail0;
+ mask = OMAP_RTC_STATUS_ALARM;
+
+ if (rtc->type->has_pmic_mode)
+ mask |= OMAP_RTC_STATUS_ALARM2;
+
+ if (rtc->type->has_power_up_reset) {
+ mask |= OMAP_RTC_STATUS_POWER_UP;
+ if (reg & OMAP_RTC_STATUS_POWER_UP)
+ dev_info(&pdev->dev, "RTC power up reset detected\n");
}
+ if (reg & mask)
+ rtc_write(rtc, OMAP_RTC_STATUS_REG, reg & mask);
+
/* On boards with split power, RTC_ON_NOFF won't reset the RTC */
- reg = rtc_read(OMAP_RTC_CTRL_REG);
- if (reg & (u8) OMAP_RTC_CTRL_STOP)
- pr_info("%s: already running\n", pdev->name);
+ reg = rtc_read(rtc, OMAP_RTC_CTRL_REG);
+ if (reg & OMAP_RTC_CTRL_STOP)
+ dev_info(&pdev->dev, "already running\n");
/* force to 24 hour mode */
- new_ctrl = reg & (OMAP_RTC_CTRL_SPLIT|OMAP_RTC_CTRL_AUTO_COMP);
+ new_ctrl = reg & (OMAP_RTC_CTRL_SPLIT | OMAP_RTC_CTRL_AUTO_COMP);
new_ctrl |= OMAP_RTC_CTRL_STOP;
- /* BOARD-SPECIFIC CUSTOMIZATION CAN GO HERE:
+ /*
+ * BOARD-SPECIFIC CUSTOMIZATION CAN GO HERE:
*
* - Device wake-up capability setting should come through chip
* init logic. OMAP1 boards should initialize the "wakeup capable"
@@ -482,36 +587,70 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
* is write-only, and always reads as zero...)
*/
+ if (new_ctrl & OMAP_RTC_CTRL_SPLIT)
+ dev_info(&pdev->dev, "split power mode\n");
+
+ if (reg != new_ctrl)
+ rtc_write(rtc, OMAP_RTC_CTRL_REG, new_ctrl);
+
device_init_wakeup(&pdev->dev, true);
- if (new_ctrl & (u8) OMAP_RTC_CTRL_SPLIT)
- pr_info("%s: split power mode\n", pdev->name);
+ rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
+ &omap_rtc_ops, THIS_MODULE);
+ if (IS_ERR(rtc->rtc)) {
+ ret = PTR_ERR(rtc->rtc);
+ goto err;
+ }
- if (reg != new_ctrl)
- rtc_write(new_ctrl, OMAP_RTC_CTRL_REG);
+ /* handle periodic and alarm irqs */
+ ret = devm_request_irq(&pdev->dev, rtc->irq_timer, rtc_irq, 0,
+ dev_name(&rtc->rtc->dev), rtc);
+ if (ret)
+ goto err;
+
+ if (rtc->irq_timer != rtc->irq_alarm) {
+ ret = devm_request_irq(&pdev->dev, rtc->irq_alarm, rtc_irq, 0,
+ dev_name(&rtc->rtc->dev), rtc);
+ if (ret)
+ goto err;
+ }
+
+ if (rtc->is_pmic_controller) {
+ if (!pm_power_off) {
+ omap_rtc_power_off_rtc = rtc;
+ pm_power_off = omap_rtc_power_off;
+ }
+ }
return 0;
-fail0:
- if (id_entry->driver_data & OMAP_RTC_HAS_KICKER)
- rtc_writel(0, OMAP_RTC_KICK0_REG);
+err:
+ device_init_wakeup(&pdev->dev, false);
+ if (rtc->type->has_kicker)
+ rtc_writel(rtc, OMAP_RTC_KICK0_REG, 0);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
- return -EIO;
+
+ return ret;
}
static int __exit omap_rtc_remove(struct platform_device *pdev)
{
- const struct platform_device_id *id_entry =
- platform_get_device_id(pdev);
+ struct omap_rtc *rtc = platform_get_drvdata(pdev);
+
+ if (pm_power_off == omap_rtc_power_off &&
+ omap_rtc_power_off_rtc == rtc) {
+ pm_power_off = NULL;
+ omap_rtc_power_off_rtc = NULL;
+ }
device_init_wakeup(&pdev->dev, 0);
/* leave rtc running, but disable irqs */
- rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
+ rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, 0);
- if (id_entry->driver_data & OMAP_RTC_HAS_KICKER)
- rtc_writel(0, OMAP_RTC_KICK0_REG);
+ if (rtc->type->has_kicker)
+ rtc_writel(rtc, OMAP_RTC_KICK0_REG, 0);
/* Disable the clock/module */
pm_runtime_put_sync(&pdev->dev);
@@ -521,20 +660,21 @@ static int __exit omap_rtc_remove(struct platform_device *pdev)
}
#ifdef CONFIG_PM_SLEEP
-static u8 irqstat;
-
static int omap_rtc_suspend(struct device *dev)
{
- irqstat = rtc_read(OMAP_RTC_INTERRUPTS_REG);
+ struct omap_rtc *rtc = dev_get_drvdata(dev);
- /* FIXME the RTC alarm is not currently acting as a wakeup event
+ rtc->interrupts_reg = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
+
+ /*
+ * FIXME: the RTC alarm is not currently acting as a wakeup event
* source on some platforms, and in fact this enable() call is just
* saving a flag that's never used...
*/
if (device_may_wakeup(dev))
- enable_irq_wake(omap_rtc_alarm);
+ enable_irq_wake(rtc->irq_alarm);
else
- rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
+ rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, 0);
/* Disable the clock/module */
pm_runtime_put_sync(dev);
@@ -544,13 +684,15 @@ static int omap_rtc_suspend(struct device *dev)
static int omap_rtc_resume(struct device *dev)
{
+ struct omap_rtc *rtc = dev_get_drvdata(dev);
+
/* Enable the clock/module so that we can access the registers */
pm_runtime_get_sync(dev);
if (device_may_wakeup(dev))
- disable_irq_wake(omap_rtc_alarm);
+ disable_irq_wake(rtc->irq_alarm);
else
- rtc_write(irqstat, OMAP_RTC_INTERRUPTS_REG);
+ rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, rtc->interrupts_reg);
return 0;
}
@@ -560,23 +702,31 @@ static SIMPLE_DEV_PM_OPS(omap_rtc_pm_ops, omap_rtc_suspend, omap_rtc_resume);
static void omap_rtc_shutdown(struct platform_device *pdev)
{
- rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
+ struct omap_rtc *rtc = platform_get_drvdata(pdev);
+ u8 mask;
+
+ /*
+ * Keep the ALARM interrupt enabled to allow the system to power up on
+ * alarm events.
+ */
+ mask = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
+ mask &= OMAP_RTC_INTERRUPTS_IT_ALARM;
+ rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, mask);
}
-MODULE_ALIAS("platform:omap_rtc");
static struct platform_driver omap_rtc_driver = {
.remove = __exit_p(omap_rtc_remove),
.shutdown = omap_rtc_shutdown,
.driver = {
- .name = DRIVER_NAME,
- .owner = THIS_MODULE,
+ .name = "omap_rtc",
.pm = &omap_rtc_pm_ops,
.of_match_table = omap_rtc_of_match,
},
- .id_table = omap_rtc_devtype,
+ .id_table = omap_rtc_id_table,
};
module_platform_driver_probe(omap_rtc_driver, omap_rtc_probe);
+MODULE_ALIAS("platform:omap_rtc");
MODULE_AUTHOR("George G. Davis (and others)");
MODULE_LICENSE("GPL");