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pinctrl: qcom: Hook pm_power_down for shutdown support 

Assign pm_power_off() if we have the PS_HOLD functionality so
that we can properly shutdown the SoC. Otherwise, shutdown won't
do anything besides put the CPU into a tight loop. Unfortunately,
we have to use a singleton here because pm_power_off() doesn't
take any arguments. Fortunately there's only one instance of the
pinctrl device on a running system so this isn't a problem.

Cc: Pramod Gurav <pramod.gurav@smartplayin.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Stephen Boyd 2015-07-06 18:09:30 -07:00 committed by Linus Walleij
parent e3f3aaac06
commit ad64498762
1 changed files with 10 additions and 0 deletions
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10
drivers/pinctrl/qcom/pinctrl-msm.c
View File

@ -28,6 +28,7 @@
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/reboot.h>
#include <linux/pm.h>
#include "../core.h"
#include "../pinconf.h"
@ -855,6 +856,13 @@ static int msm_ps_hold_restart(struct notifier_block *nb, unsigned long action,
return NOTIFY_DONE;
}
static struct msm_pinctrl *poweroff_pctrl;
static void msm_ps_hold_poweroff(void)
{
msm_ps_hold_restart(&poweroff_pctrl->restart_nb, 0, NULL);
}
static void msm_pinctrl_setup_pm_reset(struct msm_pinctrl *pctrl)
{
int i;
@ -867,6 +875,8 @@ static void msm_pinctrl_setup_pm_reset(struct msm_pinctrl *pctrl)
if (register_restart_handler(&pctrl->restart_nb))
dev_err(pctrl->dev,
"failed to setup restart handler.\n");
poweroff_pctrl = pctrl;
pm_power_off = msm_ps_hold_poweroff;
break;
}
}