diff options
| author | Vaibhav Hiremath <vaibhav.hiremath@linaro.org> | 2016-02-25 04:37:35 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@google.com> | 2016-02-25 16:24:23 -0800 |
| commit | 685353c12ea33e99d1daba5b3721b9033cdbdb87 (patch) | |
| tree | 6d80d8b42b7f2c8aa41b6270378387ae88fd29d1 /drivers | |
| parent | db5a3bca56584c0ae62dbe0b280333c75a813b0a (diff) | |
greybus: arche-platform: Add wake detect state based on functionality
If driver needs to process wake/detect events from SVC, by enabling
interrupt support on wake/detect event, it becomes easier to maintain
state of wake/detect line based on functionality.
Testing Done: Tested on DB3.5 platform.
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Reviewed-by: Michael Scott <michael.scott@linaro.org>
Tested-by: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/greybus/arche-platform.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/staging/greybus/arche-platform.c b/drivers/staging/greybus/arche-platform.c index 50991a601731..dcc3844854c2 100644 --- a/drivers/staging/greybus/arche-platform.c +++ b/drivers/staging/greybus/arche-platform.c @@ -21,6 +21,15 @@ #include <linux/usb/usb3613.h> +enum svc_wakedetect_state { + WD_STATE_IDLE, /* Default state = pulled high/low */ + WD_STATE_BOOT_INIT, /* WD = falling edge (low) */ + WD_STATE_COLDBOOT_TRIG, /* WD = rising edge (high), > 30msec */ + WD_STATE_STANDBYBOOT_TRIG, /* As of now not used ?? */ + WD_STATE_COLDBOOT_START, /* Cold boot process started */ + WD_STATE_STANDBYBOOT_START, /* Not used */ +}; + struct arche_platform_drvdata { /* Control GPIO signals to and from AP <=> SVC */ int svc_reset_gpio; @@ -39,6 +48,8 @@ struct arche_platform_drvdata { int num_apbs; struct delayed_work delayed_work; + enum svc_wakedetect_state wake_detect_state; + struct device *dev; }; @@ -145,6 +156,7 @@ static void arche_platform_poweroff_seq(struct arche_platform_drvdata *arche_pda /* Send disconnect/detach event to SVC */ gpio_set_value(arche_pdata->wake_detect_gpio, 0); usleep_range(100, 200); + arche_pdata->wake_detect_state = WD_STATE_IDLE; clk_disable_unprepare(arche_pdata->svc_ref_clk); } @@ -328,6 +340,7 @@ static int arche_platform_probe(struct platform_device *pdev) } /* deassert wake detect */ gpio_direction_output(arche_pdata->wake_detect_gpio, 0); + arche_pdata->wake_detect_state = WD_STATE_IDLE; arche_pdata->dev = &pdev->dev; |