From: "Maciej W. Rozycki" <macro@linux-mips.org>
To: Alessandro Zummo <a.zummo@towertech.it>,
Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: linux-rtc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/2] rtc: cmos: Remove the `use_acpi_alarm' module parameter for !ACPI
Date: Tue, 2 Oct 2018 02:09:05 +0100 (BST) [thread overview]
Message-ID: <alpine.LFD.2.21.1810020154530.20762@eddie.linux-mips.org> (raw)
In-Reply-To: <alpine.LFD.2.21.1810020122330.20762@eddie.linux-mips.org>
Fix a problem with commit 311ee9c151ad ("rtc: cmos: allow using ACPI for
RTC alarm instead of HPET") defining `use_acpi_alarm' module parameter
even for non-ACPI platforms, which ignore it. Wrap the definition into
#ifdef CONFIG_ACPI and use a static inline wrapper function, hardcoded
to return 0 and consequently optimized away for !ACPI, following the
existing pattern with HPET handling functions.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Fixes: 311ee9c151ad ("rtc: cmos: allow using ACPI for RTC alarm instead of HPET")
Cc: stable@vger.kernel.org # 4.18+
---
drivers/rtc/rtc-cmos.c | 27 ++++++++++++++++++++-------
1 file changed, 20 insertions(+), 7 deletions(-)
linux-rtc-cmos-use-acpi-alarm.diff
Index: linux-20180812-4maxp64/drivers/rtc/rtc-cmos.c
===================================================================
--- linux-20180812-4maxp64.orig/drivers/rtc/rtc-cmos.c
+++ linux-20180812-4maxp64/drivers/rtc/rtc-cmos.c
@@ -50,6 +50,7 @@
/* this is for "generic access to PC-style RTC" using CMOS_READ/CMOS_WRITE */
#include <linux/mc146818rtc.h>
+#ifdef CONFIG_ACPI
/*
* Use ACPI SCI to replace HPET interrupt for RTC Alarm event
*
@@ -61,6 +62,18 @@
static bool use_acpi_alarm;
module_param(use_acpi_alarm, bool, 0444);
+static inline int cmos_use_acpi_alarm(void)
+{
+ return use_acpi_alarm;
+}
+#else /* !CONFIG_ACPI */
+
+static inline int cmos_use_acpi_alarm(void)
+{
+ return 0;
+}
+#endif
+
struct cmos_rtc {
struct rtc_device *rtc;
struct device *dev;
@@ -169,7 +182,7 @@ static inline int hpet_unregister_irq_ha
/* Don't use HPET for RTC Alarm event if ACPI Fixed event is used */
static inline int use_hpet_alarm(void)
{
- return is_hpet_enabled() && !use_acpi_alarm;
+ return is_hpet_enabled() && !cmos_use_acpi_alarm();
}
/*----------------------------------------------------------------*/
@@ -340,7 +353,7 @@ static void cmos_irq_enable(struct cmos_
if (use_hpet_alarm())
hpet_set_rtc_irq_bit(mask);
- if ((mask & RTC_AIE) && use_acpi_alarm) {
+ if ((mask & RTC_AIE) && cmos_use_acpi_alarm()) {
if (cmos->wake_on)
cmos->wake_on(cmos->dev);
}
@@ -358,7 +371,7 @@ static void cmos_irq_disable(struct cmos
if (use_hpet_alarm())
hpet_mask_rtc_irq_bit(mask);
- if ((mask & RTC_AIE) && use_acpi_alarm) {
+ if ((mask & RTC_AIE) && cmos_use_acpi_alarm()) {
if (cmos->wake_off)
cmos->wake_off(cmos->dev);
}
@@ -980,7 +993,7 @@ static int cmos_suspend(struct device *d
}
spin_unlock_irq(&rtc_lock);
- if ((tmp & RTC_AIE) && !use_acpi_alarm) {
+ if ((tmp & RTC_AIE) && !cmos_use_acpi_alarm()) {
cmos->enabled_wake = 1;
if (cmos->wake_on)
cmos->wake_on(dev);
@@ -1031,7 +1044,7 @@ static void cmos_check_wkalrm(struct dev
* ACPI RTC wake event is cleared after resume from STR,
* ACK the rtc irq here
*/
- if (t_now >= cmos->alarm_expires && use_acpi_alarm) {
+ if (t_now >= cmos->alarm_expires && cmos_use_acpi_alarm()) {
cmos_interrupt(0, (void *)cmos->rtc);
return;
}
@@ -1053,7 +1066,7 @@ static int __maybe_unused cmos_resume(st
struct cmos_rtc *cmos = dev_get_drvdata(dev);
unsigned char tmp;
- if (cmos->enabled_wake && !use_acpi_alarm) {
+ if (cmos->enabled_wake && !cmos_use_acpi_alarm()) {
if (cmos->wake_off)
cmos->wake_off(dev);
else
@@ -1132,7 +1145,7 @@ static u32 rtc_handler(void *context)
* Or else, ACPI SCI is enabled during suspend/resume only,
* update rtc irq in that case.
*/
- if (use_acpi_alarm)
+ if (cmos_use_acpi_alarm())
cmos_interrupt(0, (void *)cmos->rtc);
else {
/* Fix me: can we use cmos_interrupt() here as well? */
next prev parent reply other threads:[~2018-10-02 1:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-02 1:08 [PATCH 0/2] rtc: cmos: Fix non-ACPI (non-x86) platform support Maciej W. Rozycki
2018-10-02 1:08 ` [PATCH 1/2] rtc: cmos: Fix non-ACPI undefined reference to `hpet_rtc_interrupt' Maciej W. Rozycki
2018-10-02 1:09 ` Maciej W. Rozycki [this message]
2018-10-04 10:29 ` [PATCH 0/2] rtc: cmos: Fix non-ACPI (non-x86) platform support Alexandre Belloni
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=alpine.LFD.2.21.1810020154530.20762@eddie.linux-mips.org \
--to=macro@linux-mips.org \
--cc=a.zummo@towertech.it \
--cc=alexandre.belloni@bootlin.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rtc@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).