diff options
| author | Keerthy | 2018-05-18 14:10:22 +0530 |
|---|---|---|
| committer | Tony Lindgren | 2018-05-18 06:59:29 -0700 |
| commit | a9f73632416fe50549b95573fe63144a0a3ed9f1 (patch) | |
| tree | d64ecc0ed1c0eae0e8616f6dcce5c6b06ff350bb | |
| parent | e37fbf0527d4e6f531d9b854d4fd70c36c578879 (diff) | |
ARM: OMAP2+: prm44xx: Inroduce cpu_pm notifiers for context save/restore
Inroduce cpu_pm notifiers for context save/restore. This will be
needed for am43xx family in case of rtc only mode with ddr in
self-refresh.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
| -rw-r--r-- | arch/arm/mach-omap2/prm44xx.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/prm44xx.c b/arch/arm/mach-omap2/prm44xx.c index 18b4955ff755..7b95729e8359 100644 --- a/arch/arm/mach-omap2/prm44xx.c +++ b/arch/arm/mach-omap2/prm44xx.c @@ -12,6 +12,7 @@ * published by the Free Software Foundation. */ +#include <linux/cpu_pm.h> #include <linux/kernel.h> #include <linux/delay.h> #include <linux/errno.h> @@ -30,6 +31,7 @@ #include "prcm44xx.h" #include "prminst44xx.h" #include "powerdomain.h" +#include "pm.h" /* Static data */ @@ -768,6 +770,22 @@ void prm_restore_context(void) omap4_prcm_irq_setup.pm_ctrl); } +static int cpu_notifier(struct notifier_block *nb, unsigned long cmd, void *v) +{ + switch (cmd) { + case CPU_CLUSTER_PM_ENTER: + if (enable_off_mode) + prm_save_context(); + break; + case CPU_CLUSTER_PM_EXIT: + if (enable_off_mode) + prm_restore_context(); + break; + } + + return NOTIFY_OK; +} + /* * XXX document */ @@ -788,6 +806,7 @@ static const struct omap_prcm_init_data *prm_init_data; int __init omap44xx_prm_init(const struct omap_prcm_init_data *data) { + static struct notifier_block nb; omap_prm_base_init(); prm_init_data = data; @@ -809,6 +828,12 @@ int __init omap44xx_prm_init(const struct omap_prcm_init_data *data) omap4_prcm_irq_setup.mask = AM43XX_PRM_IRQENABLE_MPU_OFFSET; } + /* Only AM43XX can lose prm context during rtc-ddr suspend */ + if (soc_is_am43xx()) { + nb.notifier_call = cpu_notifier; + cpu_pm_register_notifier(&nb); + } + return prm_register(&omap44xx_prm_ll_data); } |