diff options
Diffstat (limited to 'nixos/modules/kernel-patches/0035-rtc-rs5c372-let-the-alarm-to-be-used-as-wakeup-sourc.patch')
| -rw-r--r-- | nixos/modules/kernel-patches/0035-rtc-rs5c372-let-the-alarm-to-be-used-as-wakeup-sourc.patch | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/nixos/modules/kernel-patches/0035-rtc-rs5c372-let-the-alarm-to-be-used-as-wakeup-sourc.patch b/nixos/modules/kernel-patches/0035-rtc-rs5c372-let-the-alarm-to-be-used-as-wakeup-sourc.patch new file mode 100644 index 0000000..ec3186a --- /dev/null +++ b/nixos/modules/kernel-patches/0035-rtc-rs5c372-let-the-alarm-to-be-used-as-wakeup-sourc.patch @@ -0,0 +1,80 @@ +From 406867ec540eff2b484512063e8f9ade22daac07 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Daniel=20Gonz=C3=A1lez=20Cabanelas?= <dgcbueu@gmail.com> +Date: Tue, 27 Sep 2022 16:21:26 +0200 +Subject: [PATCH 35/96] rtc: rs5c372: let the alarm to be used as wakeup source +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +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 ab4b5209870d..5a1db45998c2 100644 +--- a/drivers/rtc/rtc-rs5c372.c ++++ b/drivers/rtc/rtc-rs5c372.c +@@ -833,6 +833,7 @@ 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__); + +@@ -868,6 +869,12 @@ 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; +@@ -901,6 +908,8 @@ 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. + * +@@ -927,6 +936,10 @@ 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); +@@ -940,6 +953,9 @@ 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: +-- +2.37.2 + |