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greybus: arche-platform: Enter ACTIVE state only from OFF state

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Make sure that, transition to active state happens only from OFF state.
Instead of imposing the restriction to user-space, driver internally
switches to OFF state and then to ACTIVE state.

Testing Done: Tested on EVT1.5 platform.

Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@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 2016-05-24 18:32:03 +05:30 committed by Greg Kroah-Hartman
parent c61a8b4984
commit 0b1283e33f
1 changed files with 7 additions and 0 deletions
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7
drivers/staging/greybus/arche-platform.c
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@ -407,8 +407,15 @@ static ssize_t state_store(struct device *dev,
if (arche_pdata->state == ARCHE_PLATFORM_STATE_ACTIVE)
goto exit;
/* First we want to make sure we power off everything
* and then activate back again */
device_for_each_child(arche_pdata->dev, NULL, apb_poweroff);
arche_platform_poweroff_seq(arche_pdata);
arche_platform_wd_irq_en(arche_pdata);
ret = arche_platform_coldboot_seq(arche_pdata);
if (ret)
goto exit;
} else if (sysfs_streq(buf, "standby")) {
if (arche_pdata->state == ARCHE_PLATFORM_STATE_STANDBY)