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greybus: arche-platform: Assert wake/detect after SVC reset without delay

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Since now driver supports interrupt based mechanism to read events
from SVC over wake/detect line, no need to delay wake/detect assertion.
We can assert wake/detect after SVC reset deassertion, so during boot
itself SVC will start sending wake_out pulses.

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>
This commit is contained in:
Vaibhav Hiremath 2016-02-25 04:37:37 +05:30 committed by Greg Kroah-Hartman
parent f760bbfb5c
commit 16fe18ca9e
1 changed files with 13 additions and 0 deletions
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13
drivers/staging/greybus/arche-platform.c
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@ -115,6 +115,16 @@ static void hub_conf_delayed_work(struct work_struct *work)
dev_warn(arche_pdata->dev, "failed to control hub device\n");
}
static void assert_wakedetect(struct arche_platform_drvdata *arche_pdata)
{
/* Assert wake/detect = Detect event from AP */
gpio_direction_output(arche_pdata->wake_detect_gpio, 1);
/* Enable interrupt here, to read event back from SVC */
gpio_direction_input(arche_pdata->wake_detect_gpio);
enable_irq(arche_pdata->wake_detect_irq);
}
static irqreturn_t arche_platform_wd_irq_thread(int irq, void *devid)
{
struct arche_platform_drvdata *arche_pdata = devid;
@ -297,6 +307,8 @@ static ssize_t state_store(struct device *dev,
return count;
ret = arche_platform_coldboot_seq(arche_pdata);
assert_wakedetect(arche_pdata);
} else if (sysfs_streq(buf, "standby")) {
if (arche_pdata->state == ARCHE_PLATFORM_STATE_STANDBY)
return count;
@ -482,6 +494,7 @@ static int arche_platform_probe(struct platform_device *pdev)
goto err_populate;
}
assert_wakedetect(arche_pdata);
INIT_DELAYED_WORK(&arche_pdata->delayed_work, hub_conf_delayed_work);
dev_info(dev, "Device registered successfully\n");