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| author | Daniel González Cabanelas <dgcbueu@gmail.com> | 2020-11-24 16:06:37 +0100 |
|---|---|---|
| committer | Petr Štetiar <ynezz@true.cz> | 2020-12-22 18:59:10 +0100 |
| commit | 8336b0df5d6de83c9f44bef470a37a93b472773a (patch) | |
| tree | b72dab10a52fc5e9ba6c9c2e55d692a5bd7e7aa6 /target/linux/generic/pending-5.4/191-rtc-rs5c372-let_the_alarm_to_be_used_as_wakeup_source.patch | |
| parent | 3d12b47985fc1983849925d2dc23430f55210c80 (diff) | |
| download | upstream-8336b0df5d6de83c9f44bef470a37a93b472773a.tar.gz upstream-8336b0df5d6de83c9f44bef470a37a93b472773a.tar.bz2 upstream-8336b0df5d6de83c9f44bef470a37a93b472773a.zip | |
kernel: rtc: rs5c372: fix alarm support
The rs5c372 RTC driver has alarm support, but it can't be enabled and only
can handle 24 hours in the future spite the chip is 1 week capable. Provide
these two patches:
- Support alarms up to 1 week
- Let the wakealarm to be used as a wakeup source
This patch makes the alarm wakeup feature to be available in the Buffallo
Linkstation LS421DE (mvebu target) and should also work with any other
device if the hardware has the proper capability.
Signed-off-by: Daniel González Cabanelas <dgcbueu@gmail.com>
Diffstat (limited to 'target/linux/generic/pending-5.4/191-rtc-rs5c372-let_the_alarm_to_be_used_as_wakeup_source.patch')
| -rw-r--r-- | target/linux/generic/pending-5.4/191-rtc-rs5c372-let_the_alarm_to_be_used_as_wakeup_source.patch | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/target/linux/generic/pending-5.4/191-rtc-rs5c372-let_the_alarm_to_be_used_as_wakeup_source.patch b/target/linux/generic/pending-5.4/191-rtc-rs5c372-let_the_alarm_to_be_used_as_wakeup_source.patch new file mode 100644 index 0000000000..d5c8c23f65 --- /dev/null +++ b/target/linux/generic/pending-5.4/191-rtc-rs5c372-let_the_alarm_to_be_used_as_wakeup_source.patch @@ -0,0 +1,72 @@ +From: Daniel González Cabanelas <dgcbueu@gmail.com> +Subject: [PATCH 2/2] rtc: rs5c372: let the alarm to be used as wakeup source + +Currently there is no use for the interrupts on the rs5c372 RTC and the +wakealarm isn't enabled. There are some devices like NASes which use this +RTC to wake up from the power off state when the INTR pin is activated by +the alarm clock. + +Enable the alarm and let to be used as a wakeup source. + +Tested on a Buffalo LS421DE NAS. + +Signed-off-by: Daniel González Cabanelas <dgcbueu@gmail.com> +--- + drivers/rtc/rtc-rs5c372.c | 16 ++++++++++++++++ + 1 file changed, 16 insertions(+) + +diff --git a/drivers/rtc/rtc-rs5c372.c b/drivers/rtc/rtc-rs5c372.c +index 94b778c6e..76775d66e 100644 +--- a/drivers/rtc/rtc-rs5c372.c ++++ b/drivers/rtc/rtc-rs5c372.c +@@ -654,6 +654,7 @@ static int rs5c372_probe(struct i2c_client *client, + int err = 0; + int smbus_mode = 0; + struct rs5c372 *rs5c372; ++ bool rs5c372_can_wakeup_device = false; + + dev_dbg(&client->dev, "%s\n", __func__); + +@@ -689,6 +690,12 @@ static int rs5c372_probe(struct i2c_client *client, + else + rs5c372->type = id->driver_data; + ++#ifdef CONFIG_OF ++ if(of_property_read_bool(client->dev.of_node, ++ "wakeup-source")) ++ rs5c372_can_wakeup_device = true; ++#endif ++ + /* we read registers 0x0f then 0x00-0x0f; skip the first one */ + rs5c372->regs = &rs5c372->buf[1]; + rs5c372->smbus = smbus_mode; +@@ -722,6 +729,8 @@ static int rs5c372_probe(struct i2c_client *client, + goto exit; + } + ++ rs5c372->has_irq = 1; ++ + /* if the oscillator lost power and no other software (like + * the bootloader) set it up, do it here. + * +@@ -748,6 +757,10 @@ static int rs5c372_probe(struct i2c_client *client, + ); + + /* REVISIT use client->irq to register alarm irq ... */ ++ if (rs5c372_can_wakeup_device) { ++ device_init_wakeup(&client->dev, true); ++ } ++ + rs5c372->rtc = devm_rtc_device_register(&client->dev, + rs5c372_driver.driver.name, + &rs5c372_rtc_ops, THIS_MODULE); +@@ -761,6 +774,9 @@ static int rs5c372_probe(struct i2c_client *client, + if (err) + goto exit; + ++ /* the rs5c372 alarm only supports a minute accuracy */ ++ rs5c372->rtc->uie_unsupported = 1; ++ + return 0; + + exit: |