linux-kernel - [RFC 2/2] soc: bcm: brcmstb: PM: Implement target

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Date:   Thu, 22 Jun 2017 18:08:37 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        linux-pm <linux-pm@...r.kernel.org>,
        Thibaud Cornic <thibaud_cornic@...madesigns.com>,
        JB <jb_lescher@...madesigns.com>, Mason <slash.tmp@...e.fr>,
        Kevin Hilman <khilman@...nel.org>, Pavel Machek <pavel@....cz>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: [RFC 2/2] soc: bcm: brcmstb: PM: Implement target_state callback

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).

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/soc/bcm/brcmstb/pm/pm-arm.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/soc/bcm/brcmstb/pm/pm-arm.c b/drivers/soc/bcm/brcmstb/pm/pm-arm.c
index 4b7e6c297b23..7d4695734093 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 {
@@ -547,9 +548,23 @@ 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 int brcmstb_target_state(void)
+{
+	return ctrl.pm_state;
+}
+
 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[] = {
-- 
2.9.3