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rtc: ds1307: fix kernel splat due to wakeup irq handling

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Since commit 3fffd12839 ("i2c: allow specifying
separate wakeup interrupt in device tree") we have
automatic wakeup irq support for i2c devices. That
commit missed the fact that rtc-1307 had its own
wakeup irq handling and ended up introducing a
kernel splat for at least Beagle x15 boards.

Fix that by reverting original commit _and_ passing
correct interrupt names on DTS so i2c-core can
choose correct IRQ as wakeup.

Now that we have automatic wakeirq support, we can
revert the original commit which did it manually.

Fixes the following warning:

[   10.346582] WARNING: CPU: 1 PID: 263 at linux/drivers/base/power/wakeirq.c:43 dev_pm_attach_wake_irq+0xbc/0xd4()
[   10.359244] rtc-ds1307 2-006f: wake irq already initialized

Cc: Tony Lindgren <tony@atomide.com>
Cc: Nishanth Menon <nm@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Felipe Balbi 2015-11-11 10:11:01 -06:00 committed by Alexandre Belloni
parent 1ec218373b
commit 51c4cfef56
2 changed files with 4 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/boot/dts/am57xx-beagle-x15.dts
View File

@ -604,6 +604,7 @@
reg = <0x6f>;
interrupts-extended = <&crossbar_mpu GIC_SPI 2 IRQ_TYPE_EDGE_RISING>,
<&dra7_pmx_core 0x424>;
interrupt-names = "irq", "wakeup";
pinctrl-names = "default";
pinctrl-0 = <&mcp79410_pins_default>;

36
drivers/rtc/rtc-ds1307.c
View File

@ -15,9 +15,6 @@
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/pm_wakeirq.h>
#include <linux/rtc/ds1307.h>
#include <linux/rtc.h>
#include <linux/slab.h>
@ -117,7 +114,6 @@ struct ds1307 {
#define HAS_ALARM 1 /* bit 1 == irq claimed */
struct i2c_client *client;
struct rtc_device *rtc;
int wakeirq;
s32 (*read_block_data)(const struct i2c_client *client, u8 command,
u8 length, u8 *values);
s32 (*write_block_data)(const struct i2c_client *client, u8 command,
@ -1146,8 +1142,6 @@ read_rtc:
}
if (want_irq) {
struct device_node *node = client->dev.of_node;
err = devm_request_threaded_irq(&client->dev,
client->irq, NULL, irq_handler,
IRQF_SHARED | IRQF_ONESHOT,
@ -1155,34 +1149,13 @@ read_rtc:
if (err) {
client->irq = 0;
dev_err(&client->dev, "unable to request IRQ!\n");
goto no_irq;
}
} else {
set_bit(HAS_ALARM, &ds1307->flags);
dev_dbg(&client->dev, "got IRQ %d\n", client->irq);
/* Currently supported by OF code only! */
if (!node)
goto no_irq;
err = of_irq_get(node, 1);
if (err <= 0) {
if (err == -EPROBE_DEFER)
goto exit;
goto no_irq;
}
ds1307->wakeirq = err;
err = dev_pm_set_dedicated_wake_irq(&client->dev,
ds1307->wakeirq);
if (err) {
dev_err(&client->dev, "unable to setup wakeIRQ %d!\n",
err);
goto exit;
set_bit(HAS_ALARM, &ds1307->flags);
dev_dbg(&client->dev, "got IRQ %d\n", client->irq);
}
}
no_irq:
if (chip->nvram_size) {
ds1307->nvram = devm_kzalloc(&client->dev,
@ -1226,9 +1199,6 @@ static int ds1307_remove(struct i2c_client *client)
{
struct ds1307 *ds1307 = i2c_get_clientdata(client);
if (ds1307->wakeirq)
dev_pm_clear_wake_irq(&client->dev);
if (test_and_clear_bit(HAS_NVRAM, &ds1307->flags))
sysfs_remove_bin_file(&client->dev.kobj, ds1307->nvram);