diff options
| author | Markus Probst <markus.probst@posteo.de> | 2026-09-30 15:31:53 +0000 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2026-10-29 11:15:58 +0100 |
| commit | f6550426f21ec5293feddb74368be6f4e9eefac1 (patch) | |
| tree | c41434d9fa4f59d9449019ad56324f7b0cfdc992 | |
| parent | cb4e92b151141d2babd2f89e9f67599d38be3878 (diff) | |
rtc: s35390a: Add synology quirk
Synology NAS devices use interrupt signal 1 for wakeup alarms. On ACPI
it is not possible to configure pinctrl.
Use interrupt signal 1 for wakeup if no pinmux function has been
configured in devicetree and dmi sys vendor matches "Synology Inc.".
Signed-off-by: Markus Probst <markus.probst@posteo.de>
Link: https://patch.msgid.link/20260930-rtc_s35390a_int1-v10-6-e7b1cbc50a7b@posteo.de
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
| -rw-r--r-- | drivers/rtc/rtc-s35390a.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/rtc/rtc-s35390a.c b/drivers/rtc/rtc-s35390a.c index 649d36d37f1f..d3e829052927 100644 --- a/drivers/rtc/rtc-s35390a.c +++ b/drivers/rtc/rtc-s35390a.c @@ -5,6 +5,7 @@ * Copyright (c) 2007 Byron Bradley */ +#include <linux/dmi.h> #include <linux/module.h> #include <linux/rtc.h> #include <linux/i2c.h> @@ -778,8 +779,18 @@ static int s35390a_probe(struct i2c_client *client) return dev_err_probe(dev, err, "pinctrl enable failed\n"); /* If no pinmux function is defined in DT, fallback to previous behaviour */ - fallback[0] = S35390A_FUNC_IGNORE; - fallback[1] = S35390A_FUNC_WAKEUP; + + if (dmi_match(DMI_SYS_VENDOR, "Synology Inc.")) { + /* + * Synology uses interrupt signal 1 for wakeup. Since pinctrl cannot be + * configured on ACPI, we check against the dmi sys vendor. + */ + fallback[0] = S35390A_FUNC_WAKEUP; + fallback[1] = S35390A_FUNC_DISABLE; + } else { + fallback[0] = S35390A_FUNC_IGNORE; + fallback[1] = S35390A_FUNC_WAKEUP; + } for (i = 0; i < ARRAY_SIZE(s35390a_pin_groups); i++) { if (s35390a->pinfunction[i] == -1) { |