* [PATCH V2 1/5] rtc: stmp3xxx: get rid of platform-specific include for register names
2011-05-25 10:56 [PATCH V2 0/5] rtc: convert stmp3xxx from plat-stmp to mach-mxs Wolfram Sang
@ 2011-05-25 10:56 ` Wolfram Sang
2011-05-25 10:56 ` [PATCH V2 2/5] rtc: stmp3xxx: port stmp-functions to mxs-equivalents Wolfram Sang
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: Wolfram Sang @ 2011-05-25 10:56 UTC (permalink / raw)
To: linux-arm-kernel
Move the register names into the driver and rename them to kernel style.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Tested-by: Shawn Guo <shawn.guo@freescale.com>
---
drivers/rtc/rtc-stmp3xxx.c | 92 ++++++++++++++++++++++++++------------------
1 files changed, 55 insertions(+), 37 deletions(-)
diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c
index 572e953..f50213f 100644
--- a/drivers/rtc/rtc-stmp3xxx.c
+++ b/drivers/rtc/rtc-stmp3xxx.c
@@ -26,7 +26,25 @@
#include <mach/platform.h>
#include <mach/stmp3xxx.h>
-#include <mach/regs-rtc.h>
+
+#define STMP3XXX_RTC_CTRL 0x0
+#define STMP3XXX_RTC_CTRL_ALARM_IRQ_EN 0x00000001
+#define STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN 0x00000002
+#define STMP3XXX_RTC_CTRL_ALARM_IRQ 0x00000004
+#define STMP3XXX_RTC_CTRL_ONEMSEC_IRQ 0x00000008
+
+#define STMP3XXX_RTC_STAT 0x10
+#define STMP3XXX_RTC_STAT_STALE_SHIFT 16
+#define STMP3XXX_RTC_STAT_RTC_PRESENT 0x80000000
+
+#define STMP3XXX_RTC_SECONDS 0x30
+
+#define STMP3XXX_RTC_ALARM 0x40
+
+#define STMP3XXX_RTC_PERSISTENT0 0x60
+#define STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN 0x00000002
+#define STMP3XXX_RTC_PERSISTENT0_ALARM_EN 0x00000004
+#define STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE 0x00000080
struct stmp3xxx_rtc_data {
struct rtc_device *rtc;
@@ -42,8 +60,8 @@ static void stmp3xxx_wait_time(struct stmp3xxx_rtc_data *rtc_data)
* NEW_REGS/STALE_REGS bitfields go. In fact it's 0x1=P0,
* 0x2=P1, .., 0x20=P5, 0x40=ALARM, 0x80=SECONDS
*/
- while (__raw_readl(rtc_data->io + HW_RTC_STAT) &
- BF(0x80, RTC_STAT_STALE_REGS))
+ while (__raw_readl(rtc_data->io + STMP3XXX_RTC_STAT) &
+ (0x80 << STMP3XXX_RTC_STAT_STALE_SHIFT))
cpu_relax();
}
@@ -53,7 +71,7 @@ static int stmp3xxx_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
stmp3xxx_wait_time(rtc_data);
- rtc_time_to_tm(__raw_readl(rtc_data->io + HW_RTC_SECONDS), rtc_tm);
+ rtc_time_to_tm(__raw_readl(rtc_data->io + STMP3XXX_RTC_SECONDS), rtc_tm);
return 0;
}
@@ -61,7 +79,7 @@ static int stmp3xxx_rtc_set_mmss(struct device *dev, unsigned long t)
{
struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
- __raw_writel(t, rtc_data->io + HW_RTC_SECONDS);
+ __raw_writel(t, rtc_data->io + STMP3XXX_RTC_SECONDS);
stmp3xxx_wait_time(rtc_data);
return 0;
}
@@ -73,18 +91,18 @@ static irqreturn_t stmp3xxx_rtc_interrupt(int irq, void *dev_id)
u32 status;
u32 events = 0;
- status = __raw_readl(rtc_data->io + HW_RTC_CTRL) &
- (BM_RTC_CTRL_ALARM_IRQ | BM_RTC_CTRL_ONEMSEC_IRQ);
+ status = __raw_readl(rtc_data->io + STMP3XXX_RTC_CTRL) &
+ (STMP3XXX_RTC_CTRL_ALARM_IRQ | STMP3XXX_RTC_CTRL_ONEMSEC_IRQ);
- if (status & BM_RTC_CTRL_ALARM_IRQ) {
- stmp3xxx_clearl(BM_RTC_CTRL_ALARM_IRQ,
- rtc_data->io + HW_RTC_CTRL);
+ if (status & STMP3XXX_RTC_CTRL_ALARM_IRQ) {
+ stmp3xxx_clearl(STMP3XXX_RTC_CTRL_ALARM_IRQ,
+ rtc_data->io + STMP3XXX_RTC_CTRL);
events |= RTC_AF | RTC_IRQF;
}
- if (status & BM_RTC_CTRL_ONEMSEC_IRQ) {
- stmp3xxx_clearl(BM_RTC_CTRL_ONEMSEC_IRQ,
- rtc_data->io + HW_RTC_CTRL);
+ if (status & STMP3XXX_RTC_CTRL_ONEMSEC_IRQ) {
+ stmp3xxx_clearl(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ,
+ rtc_data->io + STMP3XXX_RTC_CTRL);
if (++rtc_data->irq_count % 1000 == 0) {
events |= RTC_UF | RTC_IRQF;
rtc_data->irq_count = 0;
@@ -100,17 +118,17 @@ static irqreturn_t stmp3xxx_rtc_interrupt(int irq, void *dev_id)
static int stmp3xxx_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
- void __iomem *p = rtc_data->io + HW_RTC_PERSISTENT0,
- *ctl = rtc_data->io + HW_RTC_CTRL;
+ void __iomem *p = rtc_data->io + STMP3XXX_RTC_PERSISTENT0,
+ *ctl = rtc_data->io + STMP3XXX_RTC_CTRL;
if (enabled) {
- stmp3xxx_setl(BM_RTC_PERSISTENT0_ALARM_EN |
- BM_RTC_PERSISTENT0_ALARM_WAKE_EN, p);
- stmp3xxx_setl(BM_RTC_CTRL_ALARM_IRQ_EN, ctl);
+ stmp3xxx_setl(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
+ STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN, p);
+ stmp3xxx_setl(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, ctl);
} else {
- stmp3xxx_clearl(BM_RTC_PERSISTENT0_ALARM_EN |
- BM_RTC_PERSISTENT0_ALARM_WAKE_EN, p);
- stmp3xxx_clearl(BM_RTC_CTRL_ALARM_IRQ_EN, ctl);
+ stmp3xxx_clearl(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
+ STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN, p);
+ stmp3xxx_clearl(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, ctl);
}
return 0;
}
@@ -119,7 +137,7 @@ static int stmp3xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
{
struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
- rtc_time_to_tm(__raw_readl(rtc_data->io + HW_RTC_ALARM), &alm->time);
+ rtc_time_to_tm(__raw_readl(rtc_data->io + STMP3XXX_RTC_ALARM), &alm->time);
return 0;
}
@@ -129,7 +147,7 @@ static int stmp3xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
rtc_tm_to_time(&alm->time, &t);
- __raw_writel(t, rtc_data->io + HW_RTC_ALARM);
+ __raw_writel(t, rtc_data->io + STMP3XXX_RTC_ALARM);
return 0;
}
@@ -149,8 +167,8 @@ static int stmp3xxx_rtc_remove(struct platform_device *pdev)
if (!rtc_data)
return 0;
- stmp3xxx_clearl(BM_RTC_CTRL_ONEMSEC_IRQ_EN | BM_RTC_CTRL_ALARM_IRQ_EN,
- rtc_data->io + HW_RTC_CTRL);
+ stmp3xxx_clearl(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN | STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
+ rtc_data->io + STMP3XXX_RTC_CTRL);
free_irq(rtc_data->irq_alarm, &pdev->dev);
free_irq(rtc_data->irq_1msec, &pdev->dev);
rtc_device_unregister(rtc_data->rtc);
@@ -187,18 +205,18 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
rtc_data->irq_alarm = platform_get_irq(pdev, 0);
rtc_data->irq_1msec = platform_get_irq(pdev, 1);
- if (!(__raw_readl(HW_RTC_STAT + rtc_data->io) &
- BM_RTC_STAT_RTC_PRESENT)) {
+ if (!(__raw_readl(STMP3XXX_RTC_STAT + rtc_data->io) &
+ STMP3XXX_RTC_STAT_RTC_PRESENT)) {
dev_err(&pdev->dev, "no device onboard\n");
err = -ENODEV;
goto out_remap;
}
stmp3xxx_reset_block(rtc_data->io, true);
- stmp3xxx_clearl(BM_RTC_PERSISTENT0_ALARM_EN |
- BM_RTC_PERSISTENT0_ALARM_WAKE_EN |
- BM_RTC_PERSISTENT0_ALARM_WAKE,
- rtc_data->io + HW_RTC_PERSISTENT0);
+ stmp3xxx_clearl(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
+ STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN |
+ STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE,
+ rtc_data->io + STMP3XXX_RTC_PERSISTENT0);
rtc_data->rtc = rtc_device_register(pdev->name, &pdev->dev,
&stmp3xxx_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc_data->rtc)) {
@@ -229,8 +247,8 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
out_irq1:
free_irq(rtc_data->irq_alarm, &pdev->dev);
out_irq_alarm:
- stmp3xxx_clearl(BM_RTC_CTRL_ONEMSEC_IRQ_EN | BM_RTC_CTRL_ALARM_IRQ_EN,
- rtc_data->io + HW_RTC_CTRL);
+ stmp3xxx_clearl(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN | STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
+ rtc_data->io + STMP3XXX_RTC_CTRL);
rtc_device_unregister(rtc_data->rtc);
out_remap:
iounmap(rtc_data->io);
@@ -250,10 +268,10 @@ static int stmp3xxx_rtc_resume(struct platform_device *dev)
struct stmp3xxx_rtc_data *rtc_data = platform_get_drvdata(dev);
stmp3xxx_reset_block(rtc_data->io, true);
- stmp3xxx_clearl(BM_RTC_PERSISTENT0_ALARM_EN |
- BM_RTC_PERSISTENT0_ALARM_WAKE_EN |
- BM_RTC_PERSISTENT0_ALARM_WAKE,
- rtc_data->io + HW_RTC_PERSISTENT0);
+ stmp3xxx_clearl(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
+ STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN |
+ STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE,
+ rtc_data->io + STMP3XXX_RTC_PERSISTENT0);
return 0;
}
#else
--
1.7.2.5
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH V2 2/5] rtc: stmp3xxx: port stmp-functions to mxs-equivalents
2011-05-25 10:56 [PATCH V2 0/5] rtc: convert stmp3xxx from plat-stmp to mach-mxs Wolfram Sang
2011-05-25 10:56 ` [PATCH V2 1/5] rtc: stmp3xxx: get rid of platform-specific include for register names Wolfram Sang
@ 2011-05-25 10:56 ` Wolfram Sang
2011-05-25 10:56 ` [PATCH V2 3/5] rtc: stmp3xxx: Initialize drvdata before registering device Wolfram Sang
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: Wolfram Sang @ 2011-05-25 10:56 UTC (permalink / raw)
To: linux-arm-kernel
plat-stmp has been removed meanwhile since it is compatible to mach-mxs.
Use the apropriate mxs-functions for transition. The accessors will be
converted to readl/writel in a later patch.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Tested-by: Shawn Guo <shawn.guo@freescale.com>
---
drivers/rtc/Kconfig | 6 +++---
drivers/rtc/rtc-stmp3xxx.c | 28 ++++++++++++++--------------
2 files changed, 17 insertions(+), 17 deletions(-)
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 4289172..67f0e5a 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -929,11 +929,11 @@ config RTC_DRV_COH901331
config RTC_DRV_STMP
- tristate "Freescale STMP3xxx RTC"
- depends on ARCH_STMP3XXX
+ tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC"
+ depends on ARCH_MXS
help
If you say yes here you will get support for the onboard
- STMP3xxx RTC.
+ STMP3xxx/i.MX23/i.MX28 RTC.
This driver can also be built as a module. If so, the module
will be called rtc-stmp3xxx.
diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c
index f50213f..44e2202 100644
--- a/drivers/rtc/rtc-stmp3xxx.c
+++ b/drivers/rtc/rtc-stmp3xxx.c
@@ -24,8 +24,8 @@
#include <linux/rtc.h>
#include <linux/slab.h>
-#include <mach/platform.h>
-#include <mach/stmp3xxx.h>
+#include <mach/common.h>
+#include <mach/mxs.h>
#define STMP3XXX_RTC_CTRL 0x0
#define STMP3XXX_RTC_CTRL_ALARM_IRQ_EN 0x00000001
@@ -95,13 +95,13 @@ static irqreturn_t stmp3xxx_rtc_interrupt(int irq, void *dev_id)
(STMP3XXX_RTC_CTRL_ALARM_IRQ | STMP3XXX_RTC_CTRL_ONEMSEC_IRQ);
if (status & STMP3XXX_RTC_CTRL_ALARM_IRQ) {
- stmp3xxx_clearl(STMP3XXX_RTC_CTRL_ALARM_IRQ,
+ __mxs_clrl(STMP3XXX_RTC_CTRL_ALARM_IRQ,
rtc_data->io + STMP3XXX_RTC_CTRL);
events |= RTC_AF | RTC_IRQF;
}
if (status & STMP3XXX_RTC_CTRL_ONEMSEC_IRQ) {
- stmp3xxx_clearl(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ,
+ __mxs_clrl(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ,
rtc_data->io + STMP3XXX_RTC_CTRL);
if (++rtc_data->irq_count % 1000 == 0) {
events |= RTC_UF | RTC_IRQF;
@@ -122,13 +122,13 @@ static int stmp3xxx_alarm_irq_enable(struct device *dev, unsigned int enabled)
*ctl = rtc_data->io + STMP3XXX_RTC_CTRL;
if (enabled) {
- stmp3xxx_setl(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
+ __mxs_setl(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN, p);
- stmp3xxx_setl(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, ctl);
+ __mxs_setl(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, ctl);
} else {
- stmp3xxx_clearl(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
+ __mxs_clrl(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN, p);
- stmp3xxx_clearl(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, ctl);
+ __mxs_clrl(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, ctl);
}
return 0;
}
@@ -167,7 +167,7 @@ static int stmp3xxx_rtc_remove(struct platform_device *pdev)
if (!rtc_data)
return 0;
- stmp3xxx_clearl(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN | STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
+ __mxs_clrl(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN | STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
rtc_data->io + STMP3XXX_RTC_CTRL);
free_irq(rtc_data->irq_alarm, &pdev->dev);
free_irq(rtc_data->irq_1msec, &pdev->dev);
@@ -212,8 +212,8 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
goto out_remap;
}
- stmp3xxx_reset_block(rtc_data->io, true);
- stmp3xxx_clearl(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
+ mxs_reset_block(rtc_data->io);
+ __mxs_clrl(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN |
STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE,
rtc_data->io + STMP3XXX_RTC_PERSISTENT0);
@@ -247,7 +247,7 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
out_irq1:
free_irq(rtc_data->irq_alarm, &pdev->dev);
out_irq_alarm:
- stmp3xxx_clearl(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN | STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
+ __mxs_clrl(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN | STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
rtc_data->io + STMP3XXX_RTC_CTRL);
rtc_device_unregister(rtc_data->rtc);
out_remap:
@@ -267,8 +267,8 @@ static int stmp3xxx_rtc_resume(struct platform_device *dev)
{
struct stmp3xxx_rtc_data *rtc_data = platform_get_drvdata(dev);
- stmp3xxx_reset_block(rtc_data->io, true);
- stmp3xxx_clearl(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
+ mxs_reset_block(rtc_data->io);
+ __mxs_clrl(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN |
STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE,
rtc_data->io + STMP3XXX_RTC_PERSISTENT0);
--
1.7.2.5
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH V2 3/5] rtc: stmp3xxx: Initialize drvdata before registering device
2011-05-25 10:56 [PATCH V2 0/5] rtc: convert stmp3xxx from plat-stmp to mach-mxs Wolfram Sang
2011-05-25 10:56 ` [PATCH V2 1/5] rtc: stmp3xxx: get rid of platform-specific include for register names Wolfram Sang
2011-05-25 10:56 ` [PATCH V2 2/5] rtc: stmp3xxx: port stmp-functions to mxs-equivalents Wolfram Sang
@ 2011-05-25 10:56 ` Wolfram Sang
2011-05-25 10:56 ` [PATCH V2 4/5] rtc: stmp3xxx: get rid of mach-specific accessors Wolfram Sang
2011-05-25 10:56 ` [PATCH V2 5/5] rtc: stmp3xxx: remove UIE handlers Wolfram Sang
4 siblings, 0 replies; 6+ messages in thread
From: Wolfram Sang @ 2011-05-25 10:56 UTC (permalink / raw)
To: linux-arm-kernel
Commit f44f7f96a20 ("RTC: Initialize kernel state from RTC") uncovered
an issue in a number of RTC drivers, where the drivers call
rtc_device_register before initializing the device or platform drvdata.
This frequently results in null pointer dereferences when the
rtc_device_register immediately makes use of the rtc device, calling
rtc_read_alarm.
The solution is to ensure the drvdata is initialized prior to registering
the rtc device.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Tested-by: Shawn Guo <shawn.guo@freescale.com>
---
Thanks to John for the commit-msg ;)
drivers/rtc/rtc-stmp3xxx.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c
index 44e2202..fae563a 100644
--- a/drivers/rtc/rtc-stmp3xxx.c
+++ b/drivers/rtc/rtc-stmp3xxx.c
@@ -172,6 +172,7 @@ static int stmp3xxx_rtc_remove(struct platform_device *pdev)
free_irq(rtc_data->irq_alarm, &pdev->dev);
free_irq(rtc_data->irq_1msec, &pdev->dev);
rtc_device_unregister(rtc_data->rtc);
+ platform_set_drvdata(pdev, NULL);
iounmap(rtc_data->io);
kfree(rtc_data);
@@ -212,11 +213,14 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
goto out_remap;
}
+ platform_set_drvdata(pdev, rtc_data);
+
mxs_reset_block(rtc_data->io);
__mxs_clrl(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN |
STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE,
rtc_data->io + STMP3XXX_RTC_PERSISTENT0);
+
rtc_data->rtc = rtc_device_register(pdev->name, &pdev->dev,
&stmp3xxx_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc_data->rtc)) {
@@ -240,8 +244,6 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
goto out_irq1;
}
- platform_set_drvdata(pdev, rtc_data);
-
return 0;
out_irq1:
@@ -251,6 +253,7 @@ out_irq_alarm:
rtc_data->io + STMP3XXX_RTC_CTRL);
rtc_device_unregister(rtc_data->rtc);
out_remap:
+ platform_set_drvdata(pdev, NULL);
iounmap(rtc_data->io);
out_free:
kfree(rtc_data);
--
1.7.2.5
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH V2 4/5] rtc: stmp3xxx: get rid of mach-specific accessors
2011-05-25 10:56 [PATCH V2 0/5] rtc: convert stmp3xxx from plat-stmp to mach-mxs Wolfram Sang
` (2 preceding siblings ...)
2011-05-25 10:56 ` [PATCH V2 3/5] rtc: stmp3xxx: Initialize drvdata before registering device Wolfram Sang
@ 2011-05-25 10:56 ` Wolfram Sang
2011-05-25 10:56 ` [PATCH V2 5/5] rtc: stmp3xxx: remove UIE handlers Wolfram Sang
4 siblings, 0 replies; 6+ messages in thread
From: Wolfram Sang @ 2011-05-25 10:56 UTC (permalink / raw)
To: linux-arm-kernel
Replace the accessors with standard readl/writel to remove their
platform-dependency. Also, drop __raw_(read|write)l-accessors while we
are here.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Tested-by: Shawn Guo <shawn.guo@freescale.com>
---
drivers/rtc/rtc-stmp3xxx.c | 62 ++++++++++++++++++++++++--------------------
1 files changed, 34 insertions(+), 28 deletions(-)
diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c
index fae563a..50f065a 100644
--- a/drivers/rtc/rtc-stmp3xxx.c
+++ b/drivers/rtc/rtc-stmp3xxx.c
@@ -18,6 +18,7 @@
*/
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/io.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
@@ -25,9 +26,10 @@
#include <linux/slab.h>
#include <mach/common.h>
-#include <mach/mxs.h>
#define STMP3XXX_RTC_CTRL 0x0
+#define STMP3XXX_RTC_CTRL_SET 0x4
+#define STMP3XXX_RTC_CTRL_CLR 0x8
#define STMP3XXX_RTC_CTRL_ALARM_IRQ_EN 0x00000001
#define STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN 0x00000002
#define STMP3XXX_RTC_CTRL_ALARM_IRQ 0x00000004
@@ -42,6 +44,8 @@
#define STMP3XXX_RTC_ALARM 0x40
#define STMP3XXX_RTC_PERSISTENT0 0x60
+#define STMP3XXX_RTC_PERSISTENT0_SET 0x64
+#define STMP3XXX_RTC_PERSISTENT0_CLR 0x68
#define STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN 0x00000002
#define STMP3XXX_RTC_PERSISTENT0_ALARM_EN 0x00000004
#define STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE 0x00000080
@@ -60,7 +64,7 @@ static void stmp3xxx_wait_time(struct stmp3xxx_rtc_data *rtc_data)
* NEW_REGS/STALE_REGS bitfields go. In fact it's 0x1=P0,
* 0x2=P1, .., 0x20=P5, 0x40=ALARM, 0x80=SECONDS
*/
- while (__raw_readl(rtc_data->io + STMP3XXX_RTC_STAT) &
+ while (readl(rtc_data->io + STMP3XXX_RTC_STAT) &
(0x80 << STMP3XXX_RTC_STAT_STALE_SHIFT))
cpu_relax();
}
@@ -71,7 +75,7 @@ static int stmp3xxx_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
stmp3xxx_wait_time(rtc_data);
- rtc_time_to_tm(__raw_readl(rtc_data->io + STMP3XXX_RTC_SECONDS), rtc_tm);
+ rtc_time_to_tm(readl(rtc_data->io + STMP3XXX_RTC_SECONDS), rtc_tm);
return 0;
}
@@ -79,7 +83,7 @@ static int stmp3xxx_rtc_set_mmss(struct device *dev, unsigned long t)
{
struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
- __raw_writel(t, rtc_data->io + STMP3XXX_RTC_SECONDS);
+ writel(t, rtc_data->io + STMP3XXX_RTC_SECONDS);
stmp3xxx_wait_time(rtc_data);
return 0;
}
@@ -91,18 +95,18 @@ static irqreturn_t stmp3xxx_rtc_interrupt(int irq, void *dev_id)
u32 status;
u32 events = 0;
- status = __raw_readl(rtc_data->io + STMP3XXX_RTC_CTRL) &
+ status = readl(rtc_data->io + STMP3XXX_RTC_CTRL) &
(STMP3XXX_RTC_CTRL_ALARM_IRQ | STMP3XXX_RTC_CTRL_ONEMSEC_IRQ);
if (status & STMP3XXX_RTC_CTRL_ALARM_IRQ) {
- __mxs_clrl(STMP3XXX_RTC_CTRL_ALARM_IRQ,
- rtc_data->io + STMP3XXX_RTC_CTRL);
+ writel(STMP3XXX_RTC_CTRL_ALARM_IRQ,
+ rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
events |= RTC_AF | RTC_IRQF;
}
if (status & STMP3XXX_RTC_CTRL_ONEMSEC_IRQ) {
- __mxs_clrl(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ,
- rtc_data->io + STMP3XXX_RTC_CTRL);
+ writel(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ,
+ rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
if (++rtc_data->irq_count % 1000 == 0) {
events |= RTC_UF | RTC_IRQF;
rtc_data->irq_count = 0;
@@ -118,17 +122,19 @@ static irqreturn_t stmp3xxx_rtc_interrupt(int irq, void *dev_id)
static int stmp3xxx_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
- void __iomem *p = rtc_data->io + STMP3XXX_RTC_PERSISTENT0,
- *ctl = rtc_data->io + STMP3XXX_RTC_CTRL;
if (enabled) {
- __mxs_setl(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
- STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN, p);
- __mxs_setl(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, ctl);
+ writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
+ STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN,
+ rtc_data->io + STMP3XXX_RTC_PERSISTENT0_SET);
+ writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
+ rtc_data->io + STMP3XXX_RTC_CTRL_SET);
} else {
- __mxs_clrl(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
- STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN, p);
- __mxs_clrl(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, ctl);
+ writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
+ STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN,
+ rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR);
+ writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
+ rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
}
return 0;
}
@@ -137,7 +143,7 @@ static int stmp3xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
{
struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
- rtc_time_to_tm(__raw_readl(rtc_data->io + STMP3XXX_RTC_ALARM), &alm->time);
+ rtc_time_to_tm(readl(rtc_data->io + STMP3XXX_RTC_ALARM), &alm->time);
return 0;
}
@@ -147,7 +153,7 @@ static int stmp3xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
rtc_tm_to_time(&alm->time, &t);
- __raw_writel(t, rtc_data->io + STMP3XXX_RTC_ALARM);
+ writel(t, rtc_data->io + STMP3XXX_RTC_ALARM);
return 0;
}
@@ -167,8 +173,8 @@ static int stmp3xxx_rtc_remove(struct platform_device *pdev)
if (!rtc_data)
return 0;
- __mxs_clrl(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN | STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
- rtc_data->io + STMP3XXX_RTC_CTRL);
+ writel(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN | STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
+ rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
free_irq(rtc_data->irq_alarm, &pdev->dev);
free_irq(rtc_data->irq_1msec, &pdev->dev);
rtc_device_unregister(rtc_data->rtc);
@@ -206,7 +212,7 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
rtc_data->irq_alarm = platform_get_irq(pdev, 0);
rtc_data->irq_1msec = platform_get_irq(pdev, 1);
- if (!(__raw_readl(STMP3XXX_RTC_STAT + rtc_data->io) &
+ if (!(readl(STMP3XXX_RTC_STAT + rtc_data->io) &
STMP3XXX_RTC_STAT_RTC_PRESENT)) {
dev_err(&pdev->dev, "no device onboard\n");
err = -ENODEV;
@@ -216,10 +222,10 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, rtc_data);
mxs_reset_block(rtc_data->io);
- __mxs_clrl(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
+ writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN |
STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE,
- rtc_data->io + STMP3XXX_RTC_PERSISTENT0);
+ rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR);
rtc_data->rtc = rtc_device_register(pdev->name, &pdev->dev,
&stmp3xxx_rtc_ops, THIS_MODULE);
@@ -249,8 +255,8 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
out_irq1:
free_irq(rtc_data->irq_alarm, &pdev->dev);
out_irq_alarm:
- __mxs_clrl(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN | STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
- rtc_data->io + STMP3XXX_RTC_CTRL);
+ writel(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN | STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
+ rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
rtc_device_unregister(rtc_data->rtc);
out_remap:
platform_set_drvdata(pdev, NULL);
@@ -271,10 +277,10 @@ static int stmp3xxx_rtc_resume(struct platform_device *dev)
struct stmp3xxx_rtc_data *rtc_data = platform_get_drvdata(dev);
mxs_reset_block(rtc_data->io);
- __mxs_clrl(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
+ writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN |
STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE,
- rtc_data->io + STMP3XXX_RTC_PERSISTENT0);
+ rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR);
return 0;
}
#else
--
1.7.2.5
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH V2 5/5] rtc: stmp3xxx: remove UIE handlers
2011-05-25 10:56 [PATCH V2 0/5] rtc: convert stmp3xxx from plat-stmp to mach-mxs Wolfram Sang
` (3 preceding siblings ...)
2011-05-25 10:56 ` [PATCH V2 4/5] rtc: stmp3xxx: get rid of mach-specific accessors Wolfram Sang
@ 2011-05-25 10:56 ` Wolfram Sang
4 siblings, 0 replies; 6+ messages in thread
From: Wolfram Sang @ 2011-05-25 10:56 UTC (permalink / raw)
To: linux-arm-kernel
The RTC core handles UIE since 6610e08 (RTC: Rework RTC code to use
timerqueue for events), so remove the specific interrupt in this driver.
To make it work at all, enable interrupts in set_alarm() if needed. Drop
IRQF_DISABLED which is deprecated, while we are here. Finally, add my
copyright after all these changes.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Tested-by: Shawn Guo <shawn.guo@freescale.com>
---
drivers/rtc/rtc-stmp3xxx.c | 57 +++++++++++++------------------------------
1 files changed, 17 insertions(+), 40 deletions(-)
diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c
index 50f065a..6999769 100644
--- a/drivers/rtc/rtc-stmp3xxx.c
+++ b/drivers/rtc/rtc-stmp3xxx.c
@@ -6,6 +6,7 @@
*
* Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
+ * Copyright 2011 Wolfram Sang, Pengutronix e.K.
*/
/*
@@ -33,7 +34,6 @@
#define STMP3XXX_RTC_CTRL_ALARM_IRQ_EN 0x00000001
#define STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN 0x00000002
#define STMP3XXX_RTC_CTRL_ALARM_IRQ 0x00000004
-#define STMP3XXX_RTC_CTRL_ONEMSEC_IRQ 0x00000008
#define STMP3XXX_RTC_STAT 0x10
#define STMP3XXX_RTC_STAT_STALE_SHIFT 16
@@ -52,9 +52,8 @@
struct stmp3xxx_rtc_data {
struct rtc_device *rtc;
- unsigned irq_count;
void __iomem *io;
- int irq_alarm, irq_1msec;
+ int irq_alarm;
};
static void stmp3xxx_wait_time(struct stmp3xxx_rtc_data *rtc_data)
@@ -92,31 +91,16 @@ static int stmp3xxx_rtc_set_mmss(struct device *dev, unsigned long t)
static irqreturn_t stmp3xxx_rtc_interrupt(int irq, void *dev_id)
{
struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev_id);
- u32 status;
- u32 events = 0;
-
- status = readl(rtc_data->io + STMP3XXX_RTC_CTRL) &
- (STMP3XXX_RTC_CTRL_ALARM_IRQ | STMP3XXX_RTC_CTRL_ONEMSEC_IRQ);
+ u32 status = readl(rtc_data->io + STMP3XXX_RTC_CTRL);
if (status & STMP3XXX_RTC_CTRL_ALARM_IRQ) {
writel(STMP3XXX_RTC_CTRL_ALARM_IRQ,
rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
- events |= RTC_AF | RTC_IRQF;
+ rtc_update_irq(rtc_data->rtc, 1, RTC_AF | RTC_IRQF);
+ return IRQ_HANDLED;
}
- if (status & STMP3XXX_RTC_CTRL_ONEMSEC_IRQ) {
- writel(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ,
- rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
- if (++rtc_data->irq_count % 1000 == 0) {
- events |= RTC_UF | RTC_IRQF;
- rtc_data->irq_count = 0;
- }
- }
-
- if (events)
- rtc_update_irq(rtc_data->rtc, 1, events);
-
- return IRQ_HANDLED;
+ return IRQ_NONE;
}
static int stmp3xxx_alarm_irq_enable(struct device *dev, unsigned int enabled)
@@ -154,6 +138,9 @@ static int stmp3xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
rtc_tm_to_time(&alm->time, &t);
writel(t, rtc_data->io + STMP3XXX_RTC_ALARM);
+
+ stmp3xxx_alarm_irq_enable(dev, alm->enabled);
+
return 0;
}
@@ -173,10 +160,9 @@ static int stmp3xxx_rtc_remove(struct platform_device *pdev)
if (!rtc_data)
return 0;
- writel(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN | STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
+ writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
free_irq(rtc_data->irq_alarm, &pdev->dev);
- free_irq(rtc_data->irq_1msec, &pdev->dev);
rtc_device_unregister(rtc_data->rtc);
platform_set_drvdata(pdev, NULL);
iounmap(rtc_data->io);
@@ -210,7 +196,6 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
}
rtc_data->irq_alarm = platform_get_irq(pdev, 0);
- rtc_data->irq_1msec = platform_get_irq(pdev, 1);
if (!(readl(STMP3XXX_RTC_STAT + rtc_data->io) &
STMP3XXX_RTC_STAT_RTC_PRESENT)) {
@@ -227,6 +212,9 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE,
rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR);
+ writel(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN | STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
+ rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
+
rtc_data->rtc = rtc_device_register(pdev->name, &pdev->dev,
&stmp3xxx_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc_data->rtc)) {
@@ -234,29 +222,17 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
goto out_remap;
}
- rtc_data->irq_count = 0;
- err = request_irq(rtc_data->irq_alarm, stmp3xxx_rtc_interrupt,
- IRQF_DISABLED, "RTC alarm", &pdev->dev);
+ err = request_irq(rtc_data->irq_alarm, stmp3xxx_rtc_interrupt, 0,
+ "RTC alarm", &pdev->dev);
if (err) {
dev_err(&pdev->dev, "Cannot claim IRQ%d\n",
rtc_data->irq_alarm);
goto out_irq_alarm;
}
- err = request_irq(rtc_data->irq_1msec, stmp3xxx_rtc_interrupt,
- IRQF_DISABLED, "RTC tick", &pdev->dev);
- if (err) {
- dev_err(&pdev->dev, "Cannot claim IRQ%d\n",
- rtc_data->irq_1msec);
- goto out_irq1;
- }
return 0;
-out_irq1:
- free_irq(rtc_data->irq_alarm, &pdev->dev);
out_irq_alarm:
- writel(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN | STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
- rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
rtc_device_unregister(rtc_data->rtc);
out_remap:
platform_set_drvdata(pdev, NULL);
@@ -313,5 +289,6 @@ module_init(stmp3xxx_rtc_init);
module_exit(stmp3xxx_rtc_exit);
MODULE_DESCRIPTION("STMP3xxx RTC Driver");
-MODULE_AUTHOR("dmitry pervushin <dpervushin@embeddedalley.com>");
+MODULE_AUTHOR("dmitry pervushin <dpervushin@embeddedalley.com> and "
+ "Wolfram Sang <w.sang@pengutronix.de>");
MODULE_LICENSE("GPL");
--
1.7.2.5
^ permalink raw reply related [flat|nested] 6+ messages in thread