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Date: Tue, 26 Mar 2024 13:10:33 +0530
From: Priyansh Jain <quic_priyjain@...cinc.com>
To: Amit Kucheria <amitk@...nel.org>,
Thara Gopinath
<thara.gopinath@...il.com>,
Bjorn Andersson <andersson@...nel.org>,
"Konrad
Dybcio" <konrad.dybcio@...aro.org>,
"Rafael J . Wysocki" <rafael@...nel.org>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Zhang Rui <rui.zhang@...el.com>, Lukasz Luba <lukasz.luba@....com>,
<linux-pm@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
CC: <quic_manafm@...cinc.com>, <quic_priyjain@...cinc.com>
Subject: [PATCH v4] thermal/drivers/tsens: Add suspend to RAM support for tsens
As part of suspend to RAM, tsens hardware will be turned off.
While resume callback, re-initialize tsens hardware.
Signed-off-by: Priyansh Jain <quic_priyjain@...cinc.com>
---
V3 -> V4: Make tsens_reinit function specific to tsens v2. Add
NULL resume callback support for platform whose versions < ver_2_x
in tsens ops.
V2 -> V3: Remove suspend callback & interrupt enablement part from
resume callback.
V1 -> V2: Update commit text to explain the necessity of this patch
drivers/thermal/qcom/tsens-v0_1.c | 6 +++++
drivers/thermal/qcom/tsens-v1.c | 3 +++
drivers/thermal/qcom/tsens-v2.c | 1 +
drivers/thermal/qcom/tsens.c | 37 +++++++++++++++++++++++++++++++
drivers/thermal/qcom/tsens.h | 5 +++++
5 files changed, 52 insertions(+)
diff --git a/drivers/thermal/qcom/tsens-v0_1.c b/drivers/thermal/qcom/tsens-v0_1.c
index 32d2d3e33287..7ed85379247b 100644
--- a/drivers/thermal/qcom/tsens-v0_1.c
+++ b/drivers/thermal/qcom/tsens-v0_1.c
@@ -329,6 +329,7 @@ static const struct tsens_ops ops_8226 = {
.init = init_8226,
.calibrate = tsens_calibrate_common,
.get_temp = get_temp_common,
+ .resume = NULL,
};
struct tsens_plat_data data_8226 = {
@@ -342,6 +343,7 @@ static const struct tsens_ops ops_8909 = {
.init = init_8909,
.calibrate = tsens_calibrate_common,
.get_temp = get_temp_common,
+ .resume = NULL,
};
struct tsens_plat_data data_8909 = {
@@ -355,6 +357,7 @@ static const struct tsens_ops ops_8916 = {
.init = init_common,
.calibrate = calibrate_8916,
.get_temp = get_temp_common,
+ .resume = NULL,
};
struct tsens_plat_data data_8916 = {
@@ -370,6 +373,7 @@ static const struct tsens_ops ops_8939 = {
.init = init_8939,
.calibrate = tsens_calibrate_common,
.get_temp = get_temp_common,
+ .resume = NULL,
};
struct tsens_plat_data data_8939 = {
@@ -385,6 +389,7 @@ static const struct tsens_ops ops_8974 = {
.init = init_common,
.calibrate = calibrate_8974,
.get_temp = get_temp_common,
+ .resume = NULL,
};
struct tsens_plat_data data_8974 = {
@@ -398,6 +403,7 @@ static const struct tsens_ops ops_9607 = {
.init = init_9607,
.calibrate = tsens_calibrate_common,
.get_temp = get_temp_common,
+ .resume = NULL,
};
struct tsens_plat_data data_9607 = {
diff --git a/drivers/thermal/qcom/tsens-v1.c b/drivers/thermal/qcom/tsens-v1.c
index dc1c4ae2d8b0..770bf0917026 100644
--- a/drivers/thermal/qcom/tsens-v1.c
+++ b/drivers/thermal/qcom/tsens-v1.c
@@ -154,6 +154,7 @@ static const struct tsens_ops ops_generic_v1 = {
.init = init_common,
.calibrate = calibrate_v1,
.get_temp = get_temp_tsens_valid,
+ .resume = NULL,
};
struct tsens_plat_data data_tsens_v1 = {
@@ -166,6 +167,7 @@ static const struct tsens_ops ops_8956 = {
.init = init_8956,
.calibrate = tsens_calibrate_common,
.get_temp = get_temp_tsens_valid,
+ .resume = NULL,
};
struct tsens_plat_data data_8956 = {
@@ -179,6 +181,7 @@ static const struct tsens_ops ops_8976 = {
.init = init_common,
.calibrate = tsens_calibrate_common,
.get_temp = get_temp_tsens_valid,
+ .resume = NULL,
};
struct tsens_plat_data data_8976 = {
diff --git a/drivers/thermal/qcom/tsens-v2.c b/drivers/thermal/qcom/tsens-v2.c
index 29a61d2d6ca3..0cb7301eca6e 100644
--- a/drivers/thermal/qcom/tsens-v2.c
+++ b/drivers/thermal/qcom/tsens-v2.c
@@ -107,6 +107,7 @@ static const struct reg_field tsens_v2_regfields[MAX_REGFIELDS] = {
static const struct tsens_ops ops_generic_v2 = {
.init = init_common,
.get_temp = get_temp_tsens_valid,
+ .resume = tsens_resume_common,
};
struct tsens_plat_data data_tsens_v2 = {
diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
index 6d7c16ccb44d..0ff588cb53b2 100644
--- a/drivers/thermal/qcom/tsens.c
+++ b/drivers/thermal/qcom/tsens.c
@@ -17,6 +17,7 @@
#include <linux/pm.h>
#include <linux/regmap.h>
#include <linux/slab.h>
+#include <linux/suspend.h>
#include <linux/thermal.h>
#include "../thermal_hwmon.h"
#include "tsens.h"
@@ -1193,6 +1194,42 @@ static int tsens_register_irq(struct tsens_priv *priv, char *irqname,
return ret;
}
+#ifdef CONFIG_SUSPEND
+static int tsens_reinit(struct tsens_priv *priv)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->ul_lock, flags);
+
+ if (tsens_version(priv) >= VER_2_X) {
+ /*
+ * Re-enable the watchdog, unmask the bark.
+ * Disable cycle completion monitoring
+ */
+ if (priv->feat->has_watchdog) {
+ regmap_field_write(priv->rf[WDOG_BARK_MASK], 0);
+ regmap_field_write(priv->rf[CC_MON_MASK], 1);
+ }
+
+ /* Re-enable interrupts */
+ tsens_enable_irq(priv);
+ }
+
+ spin_unlock_irqrestore(&priv->ul_lock, flags);
+
+ return 0;
+}
+
+int tsens_resume_common(struct tsens_priv *priv)
+{
+ if (pm_suspend_target_state == PM_SUSPEND_MEM)
+ tsens_reinit(priv);
+
+ return 0;
+}
+
+#endif /* !CONFIG_SUSPEND */
+
static int tsens_register(struct tsens_priv *priv)
{
int i, ret;
diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
index cb637fa289ca..cab39de045b1 100644
--- a/drivers/thermal/qcom/tsens.h
+++ b/drivers/thermal/qcom/tsens.h
@@ -634,6 +634,11 @@ void compute_intercept_slope(struct tsens_priv *priv, u32 *pt1, u32 *pt2, u32 mo
int init_common(struct tsens_priv *priv);
int get_temp_tsens_valid(const struct tsens_sensor *s, int *temp);
int get_temp_common(const struct tsens_sensor *s, int *temp);
+#ifdef CONFIG_SUSPEND
+int tsens_resume_common(struct tsens_priv *priv);
+#else
+#define tsens_resume_common NULL
+#endif
/* TSENS target */
extern struct tsens_plat_data data_8960;
--
2.17.1
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