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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.c80
1 files changed, 77 insertions, 3 deletions
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index 0b614e32653d..600971407aac 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -20,6 +20,9 @@
#include <linux/rtc.h>
#include <linux/bcd.h>
#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
#include <asm/io.h>
@@ -38,6 +41,8 @@
* the SoC). See the BOARD-SPECIFIC CUSTOMIZATION comment.
*/
+#define DRIVER_NAME "omap_rtc"
+
#define OMAP_RTC_BASE 0xfffb4800
/* RTC registers */
@@ -64,6 +69,9 @@
#define OMAP_RTC_COMP_MSB_REG 0x50
#define OMAP_RTC_OSC_REG 0x54
+#define OMAP_RTC_KICK0_REG 0x6c
+#define OMAP_RTC_KICK1_REG 0x70
+
/* OMAP_RTC_CTRL_REG bit fields: */
#define OMAP_RTC_CTRL_SPLIT (1<<7)
#define OMAP_RTC_CTRL_DISABLE (1<<6)
@@ -88,10 +96,18 @@
#define OMAP_RTC_INTERRUPTS_IT_ALARM (1<<3)
#define OMAP_RTC_INTERRUPTS_IT_TIMER (1<<2)
+/* OMAP_RTC_KICKER values */
+#define KICK0_VALUE 0x83e70b13
+#define KICK1_VALUE 0x95a4f1e0
+
+#define OMAP_RTC_HAS_KICKER 0x1
+
static void __iomem *rtc_base;
-#define rtc_read(addr) __raw_readb(rtc_base + (addr))
-#define rtc_write(val, addr) __raw_writeb(val, rtc_base + (addr))
+#define rtc_read(addr) readb(rtc_base + (addr))
+#define rtc_write(val, addr) writeb(val, rtc_base + (addr))
+
+#define rtc_writel(val, addr) writel(val, rtc_base + (addr))
/* we rely on the rtc framework to handle locking (rtc->ops_lock),
@@ -285,11 +301,38 @@ static struct rtc_class_ops omap_rtc_ops = {
static int omap_rtc_alarm;
static int omap_rtc_timer;
+#define OMAP_RTC_DATA_DA830_IDX 1
+
+static struct platform_device_id omap_rtc_devtype[] = {
+ {
+ .name = DRIVER_NAME,
+ }, {
+ .name = "da830-rtc",
+ .driver_data = OMAP_RTC_HAS_KICKER,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(platform, omap_rtc_devtype);
+
+static const struct of_device_id omap_rtc_of_match[] = {
+ { .compatible = "ti,da830-rtc",
+ .data = &omap_rtc_devtype[OMAP_RTC_DATA_DA830_IDX],
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, omap_rtc_of_match);
+
static int __init omap_rtc_probe(struct platform_device *pdev)
{
struct resource *res, *mem;
struct rtc_device *rtc;
u8 reg, new_ctrl;
+ const struct platform_device_id *id_entry;
+ const struct of_device_id *of_id;
+
+ of_id = of_match_device(omap_rtc_of_match, &pdev->dev);
+ if (of_id)
+ pdev->id_entry = of_id->data;
omap_rtc_timer = platform_get_irq(pdev, 0);
if (omap_rtc_timer <= 0) {
@@ -322,6 +365,16 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
goto fail;
}
+ /* Enable the clock/module so that we can access the registers */
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_get_sync(&pdev->dev);
+
+ id_entry = platform_get_device_id(pdev);
+ if (id_entry && (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 = rtc_device_register(pdev->name, &pdev->dev,
&omap_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc)) {
@@ -398,6 +451,10 @@ fail2:
fail1:
rtc_device_unregister(rtc);
fail0:
+ if (id_entry && (id_entry->driver_data & OMAP_RTC_HAS_KICKER))
+ rtc_writel(0, OMAP_RTC_KICK0_REG);
+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
iounmap(rtc_base);
fail:
release_mem_region(mem->start, resource_size(mem));
@@ -408,6 +465,8 @@ static int __exit omap_rtc_remove(struct platform_device *pdev)
{
struct rtc_device *rtc = platform_get_drvdata(pdev);
struct resource *mem = dev_get_drvdata(&rtc->dev);
+ const struct platform_device_id *id_entry =
+ platform_get_device_id(pdev);
device_init_wakeup(&pdev->dev, 0);
@@ -420,6 +479,13 @@ static int __exit omap_rtc_remove(struct platform_device *pdev)
free_irq(omap_rtc_alarm, rtc);
rtc_device_unregister(rtc);
+ if (id_entry && (id_entry->driver_data & OMAP_RTC_HAS_KICKER))
+ rtc_writel(0, OMAP_RTC_KICK0_REG);
+
+ /* Disable the clock/module */
+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+
iounmap(rtc_base);
release_mem_region(mem->start, resource_size(mem));
return 0;
@@ -442,11 +508,17 @@ static int omap_rtc_suspend(struct platform_device *pdev, pm_message_t state)
else
rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
+ /* Disable the clock/module */
+ pm_runtime_put_sync(&pdev->dev);
+
return 0;
}
static int omap_rtc_resume(struct platform_device *pdev)
{
+ /* Enable the clock/module so that we can access the registers */
+ pm_runtime_get_sync(&pdev->dev);
+
if (device_may_wakeup(&pdev->dev))
disable_irq_wake(omap_rtc_alarm);
else
@@ -471,9 +543,11 @@ static struct platform_driver omap_rtc_driver = {
.resume = omap_rtc_resume,
.shutdown = omap_rtc_shutdown,
.driver = {
- .name = "omap_rtc",
+ .name = DRIVER_NAME,
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(omap_rtc_of_match),
},
+ .id_table = omap_rtc_devtype,
};
static int __init rtc_init(void)