From b4c95fca6a9dd8ac2242a451e53781d5313b8c1d Mon Sep 17 00:00:00 2001 From: Vaibhav Hiremath Date: Sat, 13 Feb 2016 02:04:06 +0530 Subject: [PATCH] greybus: arche-platform: Pull wake/detect low in poweroff 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 Signed-off-by: Greg Kroah-Hartman --- drivers/staging/greybus/arche-platform.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/staging/greybus/arche-platform.c b/drivers/staging/greybus/arche-platform.c index 1336fc4..b2f3919 100644 --- a/drivers/staging/greybus/arche-platform.c +++ b/drivers/staging/greybus/arche-platform.c @@ -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, -- 2.7.4