diff options
| author | Gustavo Solaira <gustavos@codeaurora.org> | 2017-10-21 16:36:02 -0700 |
|---|---|---|
| committer | Gustavo Solaira <gustavos@codeaurora.org> | 2017-10-23 10:36:47 -0700 |
| commit | 215533f02a53fb753e3b93f7a335175f74ee2475 (patch) | |
| tree | 15f1e39e80b32049be4f8441f935f289ca38212c | |
| parent | 3f7ce4d543e13f2b02fa458ab63ed8d4106e52a4 (diff) | |
pps-gpio: Add new property to use system time timestamp for PPS GPIO
If the device tree property "use-system-time-ts" is defined
then the timestamp used for PPS events will be the system time,
otherwise it will be the monotonic boot time.
Change-Id: I92fab1d8861e1d652fcb68066b417f44c1f8e29b
Signed-off-by: Gustavo Solaira <gustavos@codeaurora.org>
| -rw-r--r-- | Documentation/devicetree/bindings/pps/pps-gpio.txt | 3 | ||||
| -rw-r--r-- | drivers/pps/clients/pps-gpio.c | 13 |
2 files changed, 13 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/pps/pps-gpio.txt b/Documentation/devicetree/bindings/pps/pps-gpio.txt index 40bf9c3564a5..a834868ba6a2 100644 --- a/Documentation/devicetree/bindings/pps/pps-gpio.txt +++ b/Documentation/devicetree/bindings/pps/pps-gpio.txt @@ -10,6 +10,9 @@ Required properties: Optional properties: - assert-falling-edge: when present, assert is indicated by a falling edge (instead of by a rising edge) +- use-system-time-ts: use the system time via pps_get_ts as the timestamp + if this is not defined then the timestamp will come + from the monotonic boot time Example: pps { diff --git a/drivers/pps/clients/pps-gpio.c b/drivers/pps/clients/pps-gpio.c index da72b0b59c3a..6dd425abc5a5 100644 --- a/drivers/pps/clients/pps-gpio.c +++ b/drivers/pps/clients/pps-gpio.c @@ -44,6 +44,7 @@ struct pps_gpio_device_data { bool assert_falling_edge; bool capture_clear; unsigned int gpio_pin; + bool use_system_time_ts; }; /* @@ -56,11 +57,14 @@ static irqreturn_t pps_gpio_irq_handler(int irq, void *data) struct pps_event_time ts; int rising_edge; - /* Get the time stamp first */ - get_monotonic_boottime(&ts.ts_real); - info = data; + /* Get the time stamp first */ + if (!info->use_system_time_ts) + get_monotonic_boottime(&ts.ts_real); + else + pps_get_ts(&ts); + rising_edge = gpio_get_value(info->gpio_pin); if ((rising_edge && !info->assert_falling_edge) || (!rising_edge && info->assert_falling_edge)) @@ -119,6 +123,9 @@ static int pps_gpio_probe(struct platform_device *pdev) if (of_get_property(np, "assert-falling-edge", NULL)) data->assert_falling_edge = true; + + if (of_get_property(np, "use-system-time-ts", NULL)) + data->use_system_time_ts = true; } /* GPIO setup */ |