ARM: OMAP2+: Make sure LOGICRETSTATE bits are not cleared

We may have LOGICRETSTATE cleared by the bootloader or kexec boot.

Currently this means we will see lost GPIO interrupts at least for
network interfaces such as wlcore and smsc911x if PER hits retention.

Let's fix the issue by making sure LOGICRETSTATE is set. Once we have
GPIOs working with wakeirqs then we should be able to clear it.

Cc: Keerthy <j-keerthy@ti.com>
Cc: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/mach-omap2/pm44xx.c b/arch/arm/mach-omap2/pm44xx.c
index b3870220612e60df778593529d518253085baf2d..78e1ace7d17d64bbfe619cc35e6c4d771fda82b9 100644 (file)
--- a/arch/arm/mach-omap2/pm44xx.c
+++ b/arch/arm/mach-omap2/pm44xx.c
@@ -131,6 +131,19 @@ static int __init pwrdms_setup(struct powerdomain *pwrdm, void *unused)
                return 0;
        }
 
+       /*
+        * Bootloader or kexec boot may have LOGICRETSTATE cleared
+        * for some domains. This is the case when kexec booting from
+        * Android kernels that support off mode for example.
+        * Make sure it's set at least for core and per, otherwise
+        * we currently will see lost GPIO interrupts for wlcore and
+        * smsc911x at least if per hits retention during idle.
+        */
+       if (!strncmp(pwrdm->name, "core", 4) ||
+           !strncmp(pwrdm->name, "l4per", 5) ||
+           !strncmp(pwrdm->name, "wkup", 4))
+               pwrdm_set_logic_retst(pwrdm, PWRDM_POWER_RET);
+
        pwrst = kmalloc(sizeof(struct power_state), GFP_ATOMIC);
        if (!pwrst)
                return -ENOMEM;