[PATCH 2/2] soc: bcm: brcmstb: PM: Implement target_state callback
From: f.fainelli@gmail.com (Florian Fainelli)
Date: 2017-07-16 02:36:23
Also in:
linux-pm, lkml
Subsystem:
hibernation (aka software suspend, aka swsusp), suspend to ram, the rest · Maintainers:
"Rafael J. Wysocki", Linus Torvalds
Provide a target_state callback implementation which just returns the suspend_state_t the system is about to enter. Broadcom STB drivers can utilize platform_suspend_target_state() to retrieve that and take appropriate actions (e.g: full vs. partial re-initialization). Two states are implemented: PLATFORM_STATE_WORKING and PLATFORM_STATE_BRCMSTB_S3MEM to that end. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> --- drivers/soc/bcm/brcmstb/pm/pm-arm.c | 22 ++++++++++++++++++++++ include/linux/suspend.h | 1 + 2 files changed, 23 insertions(+)
diff --git a/drivers/soc/bcm/brcmstb/pm/pm-arm.c b/drivers/soc/bcm/brcmstb/pm/pm-arm.c
index dcf8c8065508..750a74b3fc9d 100644
--- a/drivers/soc/bcm/brcmstb/pm/pm-arm.c
+++ b/drivers/soc/bcm/brcmstb/pm/pm-arm.c@@ -104,6 +104,7 @@ struct brcmstb_pm_control { u32 phy_b_standby_ctrl_offs; bool needs_ddr_pad; struct platform_device *pdev; + suspend_state_t pm_state; }; enum bsp_initiate_command {
@@ -533,9 +534,30 @@ static int brcmstb_pm_valid(suspend_state_t state) } } +static int brcmstb_pm_begin(suspend_state_t state) +{ + ctrl.pm_state = state; + + return 0; +} + +static enum platform_target_state brcmstb_target_state(void) +{ + switch (ctrl.pm_state) { + case PM_SUSPEND_STANDBY: + return PLATFORM_STATE_WORKING; + case PM_SUSPEND_MEM: + return PLATFORM_STATE_BRCMSTB_S3MEM; + default: + return PLATFORM_STATE_UNKNOWN; + } +} + static const struct platform_suspend_ops brcmstb_pm_ops = { + .begin = brcmstb_pm_begin, .enter = brcmstb_pm_enter, .valid = brcmstb_pm_valid, + .target_state = brcmstb_target_state, }; static const struct of_device_id aon_ctrl_dt_ids[] = {
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index 6e6cc0778816..15d21d76e0bf 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h@@ -58,6 +58,7 @@ enum platform_target_state { PLATFORM_STATE_ACPI_S3, PLATFORM_STATE_ACPI_S4, /* Add platform specific states here */ + PLATFORM_STATE_BRCMSTB_S3MEM, }; struct suspend_stats {
--
2.9.3