@@ -1,5 +1,5 @@
/*
- * 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>
@@ -25,7 +25,8 @@
#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
@@ -154,19 +155,20 @@ 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(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(rtc, OMAP_RTC_STATUS_REG);
- if ((status & (u8)OMAP_RTC_STATUS_BUSY) == 0)
+ if (!(status & OMAP_RTC_STATUS_BUSY))
break;
udelay(1);
}
@@ -175,9 +177,9 @@ static void rtc_wait_not_busy(struct omap_rtc *rtc)
static irqreturn_t rtc_irq(int irq, void *dev_id)
{
- struct omap_rtc *rtc = 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(rtc, OMAP_RTC_STATUS_REG);
@@ -276,6 +278,7 @@ static int omap_rtc_read_time(struct device *dev, struct rtc_time *tm)
local_irq_enable();
bcd2tm(tm);
+
return 0;
}
@@ -285,6 +288,7 @@ static int omap_rtc_set_time(struct device *dev, struct rtc_time *tm)
if (tm2bcd(tm) < 0)
return -EINVAL;
+
local_irq_disable();
rtc_wait_not_busy(rtc);
@@ -303,6 +307,7 @@ 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);
@@ -317,8 +322,9 @@ static int omap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
local_irq_enable();
bcd2tm(&alm->time);
- alm->enabled = !!(rtc_read(rtc, 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;
}
@@ -472,9 +478,9 @@ MODULE_DEVICE_TABLE(of, omap_rtc_of_match);
static int __init omap_rtc_probe(struct platform_device *pdev)
{
- struct omap_rtc *rtc;
- struct resource *res;
- u8 reg, mask, 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;
@@ -551,14 +557,15 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
/* On boards with split power, RTC_ON_NOFF won't reset the RTC */
reg = rtc_read(rtc, OMAP_RTC_CTRL_REG);
- if (reg & (u8) OMAP_RTC_CTRL_STOP)
+ 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"
@@ -572,7 +579,7 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
* is write-only, and always reads as zero...)
*/
- if (new_ctrl & (u8) OMAP_RTC_CTRL_SPLIT)
+ if (new_ctrl & OMAP_RTC_CTRL_SPLIT)
dev_info(&pdev->dev, "split power mode\n");
if (reg != new_ctrl)
@@ -651,7 +658,8 @@ static int omap_rtc_suspend(struct device *dev)
rtc->interrupts_reg = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
- /* FIXME the RTC alarm is not currently acting as a wakeup event
+ /*
+ * 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...
*/
Fix minor coding style issues like comment style, indentation and remove a few unnecessary casts. Also drop the 1 from OMAP1 in the driver description. Signed-off-by: Johan Hovold <johan@kernel.org> --- drivers/rtc/rtc-omap.c | 46 +++++++++++++++++++++++++++------------------- 1 file changed, 27 insertions(+), 19 deletions(-)