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greybus: arche-platform: Pull wake/detect low in poweroff

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When SVC goes down, make sure that wake/detect is also pulled low.
Note that this is not the criteria for SVC poweroff, but it is required
to have right state on wake/detect line before powering off.
And on next boot, the boot-sequence code would take care of
handshaking with SVC.

Tested-on: Tested on EVT1.2 and DB3.5 platform.

Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Vaibhav Hiremath 2016-02-13 02:04:06 +05:30 committed by Greg Kroah-Hartman
parent e74d04a581
commit b4c95fca6a
1 changed files with 4 additions and 0 deletions
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4
drivers/staging/greybus/arche-platform.c
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@ -136,6 +136,10 @@ static int arche_platform_coldboot_seq(struct arche_platform_drvdata *arche_pdat
static void arche_platform_poweroff_seq(struct arche_platform_drvdata *arche_pdata)
{
/* Send disconnect/detach event to SVC */
gpio_set_value(arche_pdata->wake_detect_gpio, 0);
usleep_range(100, 200);
clk_disable_unprepare(arche_pdata->svc_ref_clk);
/* As part of exit, put APB back in reset state */
svc_reset_onoff(arche_pdata->svc_reset_gpio,