From f74297dd9354c7115988c5e640d89fcfffbc70a5 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Thu, 17 May 2018 15:36:20 -0700 Subject: 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 Cc: Tero Kristo Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/pm44xx.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'arch/arm/mach-omap2') diff --git a/arch/arm/mach-omap2/pm44xx.c b/arch/arm/mach-omap2/pm44xx.c index b3870220612e..78e1ace7d17d 100644 --- 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; -- cgit