Changes in v6:
- Drop 1 & 2 changes from v5 as they already landed in maintainer tree
- Drop 3 & 4 changes from v5 as no user at present for power domain in rsc
- Rename subject to appropriate since power domain changes are droped
- Rebase other changes on top of next-20200221
Changes in v5:
- Add Rob's Acked by on dt-bindings change
- Drop firmware psci change
- Update cpuidle stats in dtsi to follow PC mode
- Include change to update dirty flag when data is updated from [4]
- Add change to invoke rpmh_flush when caches are dirty
Changes in v4:
- Add change to allow hierarchical topology in PC mode
- Drop hierarchical domain idle states converter from v3
- Address Merge sc7180 dtsi change to add low power modes
Changes in v3:
- Address Rob's comment on dt property value
- Address Stephen's comments on rpmh-rsc driver change
- Include sc7180 cpuidle low power mode changes from [1]
- Include hierarchical domain idle states converter change from [2]
Changes in v2:
- Add Stephen's Reviewed-By to the first three patches
- Addressed Stephen's comments on fourth patch
- Include changes to connect rpmh domain to cpuidle and genpds
Resource State Coordinator (RSC) is responsible for powering off/lowering
the requirements from CPU subsystem for the associated hardware like buses,
clocks, and regulators when all CPUs and cluster is powered down.
RSC power domain uses last-man activities provided by genpd framework based
on Ulf Hansoon's patch series[3], when the cluster of CPUs enter deepest
idle states. As a part of domain poweroff, RSC can lower resource state
requirements by flushing the cached sleep and wake state votes for various
resources.
[1] https://patchwork.kernel.org/patch/11218965
[2] https://patchwork.kernel.org/patch/10941671
[3] https://patchwork.kernel.org/project/linux-arm-msm/list/?series=222355
[4] https://patchwork.kernel.org/project/linux-arm-msm/list/?series=236503
Maulik Shah (3):
arm64: dts: qcom: sc7180: Add cpuidle low power states
soc: qcom: rpmh: Update dirty flag only when data changes
soc: qcom: rpmh: Invoke rpmh_flush for dirty caches
arch/arm64/boot/dts/qcom/sc7180.dtsi | 78 ++++++++++++++++++++++++++++++++++++
drivers/soc/qcom/rpmh.c | 27 ++++++++++---
2 files changed, 100 insertions(+), 5 deletions(-)
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
Currently rpmh ctrlr dirty flag is set for all cases regardless
of data is really changed or not. Add changes to update it when
data is updated to newer values.
Also move dirty flag updates to happen from within cache_lock.
Signed-off-by: Maulik Shah <[email protected]>
---
drivers/soc/qcom/rpmh.c | 21 ++++++++++++++++-----
1 file changed, 16 insertions(+), 5 deletions(-)
diff --git a/drivers/soc/qcom/rpmh.c b/drivers/soc/qcom/rpmh.c
index eb0ded0..83ba4e0 100644
--- a/drivers/soc/qcom/rpmh.c
+++ b/drivers/soc/qcom/rpmh.c
@@ -139,20 +139,27 @@ static struct cache_req *cache_rpm_request(struct rpmh_ctrlr *ctrlr,
existing:
switch (state) {
case RPMH_ACTIVE_ONLY_STATE:
- if (req->sleep_val != UINT_MAX)
+ if (req->sleep_val != UINT_MAX) {
req->wake_val = cmd->data;
+ ctrlr->dirty = true;
+ }
break;
case RPMH_WAKE_ONLY_STATE:
- req->wake_val = cmd->data;
+ if (req->wake_val != cmd->data) {
+ req->wake_val = cmd->data;
+ ctrlr->dirty = true;
+ }
break;
case RPMH_SLEEP_STATE:
- req->sleep_val = cmd->data;
+ if (req->sleep_val != cmd->data) {
+ req->sleep_val = cmd->data;
+ ctrlr->dirty = true;
+ }
break;
default:
break;
}
- ctrlr->dirty = true;
unlock:
spin_unlock_irqrestore(&ctrlr->cache_lock, flags);
@@ -287,6 +294,7 @@ static void cache_batch(struct rpmh_ctrlr *ctrlr, struct batch_cache_req *req)
spin_lock_irqsave(&ctrlr->cache_lock, flags);
list_add_tail(&req->list, &ctrlr->batch_cache);
+ ctrlr->dirty = true;
spin_unlock_irqrestore(&ctrlr->cache_lock, flags);
}
@@ -323,6 +331,7 @@ static void invalidate_batch(struct rpmh_ctrlr *ctrlr)
list_for_each_entry_safe(req, tmp, &ctrlr->batch_cache, list)
kfree(req);
INIT_LIST_HEAD(&ctrlr->batch_cache);
+ ctrlr->dirty = true;
spin_unlock_irqrestore(&ctrlr->cache_lock, flags);
}
@@ -456,6 +465,7 @@ static int send_single(struct rpmh_ctrlr *ctrlr, enum rpmh_state state,
int rpmh_flush(struct rpmh_ctrlr *ctrlr)
{
struct cache_req *p;
+ unsigned long flags;
int ret;
if (!ctrlr->dirty) {
@@ -488,7 +498,9 @@ int rpmh_flush(struct rpmh_ctrlr *ctrlr)
return ret;
}
+ spin_lock_irqsave(&ctrlr->cache_lock, flags);
ctrlr->dirty = false;
+ spin_unlock_irqrestore(&ctrlr->cache_lock, flags);
return 0;
}
@@ -507,7 +519,6 @@ int rpmh_invalidate(const struct device *dev)
int ret;
invalidate_batch(ctrlr);
- ctrlr->dirty = true;
do {
ret = rpmh_rsc_invalidate(ctrlr_to_drv(ctrlr));
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
Add changes to invoke rpmh flush when the data in cache is dirty.
This is done only if OSI is not supported in PSCI. If OSI is supported
rpmh_flush will get invoked by power domain off call when the last cpu
in the domain is going to power collapse.
Signed-off-by: Maulik Shah <[email protected]>
---
drivers/soc/qcom/rpmh.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/soc/qcom/rpmh.c b/drivers/soc/qcom/rpmh.c
index 83ba4e0..839af8d 100644
--- a/drivers/soc/qcom/rpmh.c
+++ b/drivers/soc/qcom/rpmh.c
@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
+#include <linux/psci.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/types.h>
@@ -163,6 +164,9 @@ static struct cache_req *cache_rpm_request(struct rpmh_ctrlr *ctrlr,
unlock:
spin_unlock_irqrestore(&ctrlr->cache_lock, flags);
+ if (ctrlr->dirty && !psci_has_osi_support())
+ return rpmh_flush(ctrlr) ? ERR_PTR(-EINVAL) : req;
+
return req;
}
@@ -391,6 +395,8 @@ int rpmh_write_batch(const struct device *dev, enum rpmh_state state,
if (state != RPMH_ACTIVE_ONLY_STATE) {
cache_batch(ctrlr, req);
+ if (!psci_has_osi_support())
+ return rpmh_flush(ctrlr);
return 0;
}
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
Add device bindings for cpuidle states for cpu devices.
Cc: [email protected]
Signed-off-by: Maulik Shah <[email protected]>
---
arch/arm64/boot/dts/qcom/sc7180.dtsi | 78 ++++++++++++++++++++++++++++++++++++
1 file changed, 78 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
index cc5a94f..2941a7e 100644
--- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
@@ -86,6 +86,9 @@
compatible = "arm,armv8";
reg = <0x0 0x0>;
enable-method = "psci";
+ cpu-idle-states = <&LITTLE_CPU_SLEEP_0
+ &LITTLE_CPU_SLEEP_1
+ &CLUSTER_SLEEP_0>;
next-level-cache = <&L2_0>;
#cooling-cells = <2>;
qcom,freq-domain = <&cpufreq_hw 0>;
@@ -103,6 +106,9 @@
compatible = "arm,armv8";
reg = <0x0 0x100>;
enable-method = "psci";
+ cpu-idle-states = <&LITTLE_CPU_SLEEP_0
+ &LITTLE_CPU_SLEEP_1
+ &CLUSTER_SLEEP_0>;
next-level-cache = <&L2_100>;
#cooling-cells = <2>;
qcom,freq-domain = <&cpufreq_hw 0>;
@@ -117,6 +123,9 @@
compatible = "arm,armv8";
reg = <0x0 0x200>;
enable-method = "psci";
+ cpu-idle-states = <&LITTLE_CPU_SLEEP_0
+ &LITTLE_CPU_SLEEP_1
+ &CLUSTER_SLEEP_0>;
next-level-cache = <&L2_200>;
#cooling-cells = <2>;
qcom,freq-domain = <&cpufreq_hw 0>;
@@ -131,6 +140,9 @@
compatible = "arm,armv8";
reg = <0x0 0x300>;
enable-method = "psci";
+ cpu-idle-states = <&LITTLE_CPU_SLEEP_0
+ &LITTLE_CPU_SLEEP_1
+ &CLUSTER_SLEEP_0>;
next-level-cache = <&L2_300>;
#cooling-cells = <2>;
qcom,freq-domain = <&cpufreq_hw 0>;
@@ -145,6 +157,9 @@
compatible = "arm,armv8";
reg = <0x0 0x400>;
enable-method = "psci";
+ cpu-idle-states = <&LITTLE_CPU_SLEEP_0
+ &LITTLE_CPU_SLEEP_1
+ &CLUSTER_SLEEP_0>;
next-level-cache = <&L2_400>;
#cooling-cells = <2>;
qcom,freq-domain = <&cpufreq_hw 0>;
@@ -159,6 +174,9 @@
compatible = "arm,armv8";
reg = <0x0 0x500>;
enable-method = "psci";
+ cpu-idle-states = <&LITTLE_CPU_SLEEP_0
+ &LITTLE_CPU_SLEEP_1
+ &CLUSTER_SLEEP_0>;
next-level-cache = <&L2_500>;
#cooling-cells = <2>;
qcom,freq-domain = <&cpufreq_hw 0>;
@@ -173,6 +191,9 @@
compatible = "arm,armv8";
reg = <0x0 0x600>;
enable-method = "psci";
+ cpu-idle-states = <&BIG_CPU_SLEEP_0
+ &BIG_CPU_SLEEP_1
+ &CLUSTER_SLEEP_0>;
next-level-cache = <&L2_600>;
#cooling-cells = <2>;
qcom,freq-domain = <&cpufreq_hw 1>;
@@ -187,6 +208,9 @@
compatible = "arm,armv8";
reg = <0x0 0x700>;
enable-method = "psci";
+ cpu-idle-states = <&BIG_CPU_SLEEP_0
+ &BIG_CPU_SLEEP_1
+ &CLUSTER_SLEEP_0>;
next-level-cache = <&L2_700>;
#cooling-cells = <2>;
qcom,freq-domain = <&cpufreq_hw 1>;
@@ -195,6 +219,60 @@
next-level-cache = <&L3_0>;
};
};
+
+ idle-states {
+ entry-method = "psci";
+
+ LITTLE_CPU_SLEEP_0: cpu-sleep-0-0 {
+ compatible = "arm,idle-state";
+ idle-state-name = "little-power-down";
+ arm,psci-suspend-param = <0x40000003>;
+ entry-latency-us = <549>;
+ exit-latency-us = <901>;
+ min-residency-us = <1774>;
+ local-timer-stop;
+ };
+
+ LITTLE_CPU_SLEEP_1: cpu-sleep-0-1 {
+ compatible = "arm,idle-state";
+ idle-state-name = "little-rail-power-down";
+ arm,psci-suspend-param = <0x40000004>;
+ entry-latency-us = <702>;
+ exit-latency-us = <915>;
+ min-residency-us = <4001>;
+ local-timer-stop;
+ };
+
+ BIG_CPU_SLEEP_0: cpu-sleep-1-0 {
+ compatible = "arm,idle-state";
+ idle-state-name = "big-power-down";
+ arm,psci-suspend-param = <0x40000003>;
+ entry-latency-us = <523>;
+ exit-latency-us = <1244>;
+ min-residency-us = <2207>;
+ local-timer-stop;
+ };
+
+ BIG_CPU_SLEEP_1: cpu-sleep-1-1 {
+ compatible = "arm,idle-state";
+ idle-state-name = "big-rail-power-down";
+ arm,psci-suspend-param = <0x40000004>;
+ entry-latency-us = <526>;
+ exit-latency-us = <1854>;
+ min-residency-us = <5555>;
+ local-timer-stop;
+ };
+
+ CLUSTER_SLEEP_0: cluster-sleep-0 {
+ compatible = "arm,idle-state";
+ idle-state-name = "cluster-power-down";
+ arm,psci-suspend-param = <0x40003444>;
+ entry-latency-us = <3263>;
+ exit-latency-us = <6562>;
+ min-residency-us = <9926>;
+ local-timer-stop;
+ };
+ };
};
memory@80000000 {
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
Reviewed-by: Srinivas Rao L <[email protected]>
Regards,
Srinivas.
On 2/21/2020 3:02 PM, Maulik Shah wrote:
> Add device bindings for cpuidle states for cpu devices.
>
> Cc: [email protected]
> Signed-off-by: Maulik Shah <[email protected]>
> ---
> arch/arm64/boot/dts/qcom/sc7180.dtsi | 78 ++++++++++++++++++++++++++++++++++++
> 1 file changed, 78 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> index cc5a94f..2941a7e 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> @@ -86,6 +86,9 @@
> compatible = "arm,armv8";
> reg = <0x0 0x0>;
> enable-method = "psci";
> + cpu-idle-states = <&LITTLE_CPU_SLEEP_0
> + &LITTLE_CPU_SLEEP_1
> + &CLUSTER_SLEEP_0>;
> next-level-cache = <&L2_0>;
> #cooling-cells = <2>;
> qcom,freq-domain = <&cpufreq_hw 0>;
> @@ -103,6 +106,9 @@
> compatible = "arm,armv8";
> reg = <0x0 0x100>;
> enable-method = "psci";
> + cpu-idle-states = <&LITTLE_CPU_SLEEP_0
> + &LITTLE_CPU_SLEEP_1
> + &CLUSTER_SLEEP_0>;
> next-level-cache = <&L2_100>;
> #cooling-cells = <2>;
> qcom,freq-domain = <&cpufreq_hw 0>;
> @@ -117,6 +123,9 @@
> compatible = "arm,armv8";
> reg = <0x0 0x200>;
> enable-method = "psci";
> + cpu-idle-states = <&LITTLE_CPU_SLEEP_0
> + &LITTLE_CPU_SLEEP_1
> + &CLUSTER_SLEEP_0>;
> next-level-cache = <&L2_200>;
> #cooling-cells = <2>;
> qcom,freq-domain = <&cpufreq_hw 0>;
> @@ -131,6 +140,9 @@
> compatible = "arm,armv8";
> reg = <0x0 0x300>;
> enable-method = "psci";
> + cpu-idle-states = <&LITTLE_CPU_SLEEP_0
> + &LITTLE_CPU_SLEEP_1
> + &CLUSTER_SLEEP_0>;
> next-level-cache = <&L2_300>;
> #cooling-cells = <2>;
> qcom,freq-domain = <&cpufreq_hw 0>;
> @@ -145,6 +157,9 @@
> compatible = "arm,armv8";
> reg = <0x0 0x400>;
> enable-method = "psci";
> + cpu-idle-states = <&LITTLE_CPU_SLEEP_0
> + &LITTLE_CPU_SLEEP_1
> + &CLUSTER_SLEEP_0>;
> next-level-cache = <&L2_400>;
> #cooling-cells = <2>;
> qcom,freq-domain = <&cpufreq_hw 0>;
> @@ -159,6 +174,9 @@
> compatible = "arm,armv8";
> reg = <0x0 0x500>;
> enable-method = "psci";
> + cpu-idle-states = <&LITTLE_CPU_SLEEP_0
> + &LITTLE_CPU_SLEEP_1
> + &CLUSTER_SLEEP_0>;
> next-level-cache = <&L2_500>;
> #cooling-cells = <2>;
> qcom,freq-domain = <&cpufreq_hw 0>;
> @@ -173,6 +191,9 @@
> compatible = "arm,armv8";
> reg = <0x0 0x600>;
> enable-method = "psci";
> + cpu-idle-states = <&BIG_CPU_SLEEP_0
> + &BIG_CPU_SLEEP_1
> + &CLUSTER_SLEEP_0>;
> next-level-cache = <&L2_600>;
> #cooling-cells = <2>;
> qcom,freq-domain = <&cpufreq_hw 1>;
> @@ -187,6 +208,9 @@
> compatible = "arm,armv8";
> reg = <0x0 0x700>;
> enable-method = "psci";
> + cpu-idle-states = <&BIG_CPU_SLEEP_0
> + &BIG_CPU_SLEEP_1
> + &CLUSTER_SLEEP_0>;
> next-level-cache = <&L2_700>;
> #cooling-cells = <2>;
> qcom,freq-domain = <&cpufreq_hw 1>;
> @@ -195,6 +219,60 @@
> next-level-cache = <&L3_0>;
> };
> };
> +
> + idle-states {
> + entry-method = "psci";
> +
> + LITTLE_CPU_SLEEP_0: cpu-sleep-0-0 {
> + compatible = "arm,idle-state";
> + idle-state-name = "little-power-down";
> + arm,psci-suspend-param = <0x40000003>;
> + entry-latency-us = <549>;
> + exit-latency-us = <901>;
> + min-residency-us = <1774>;
> + local-timer-stop;
> + };
> +
> + LITTLE_CPU_SLEEP_1: cpu-sleep-0-1 {
> + compatible = "arm,idle-state";
> + idle-state-name = "little-rail-power-down";
> + arm,psci-suspend-param = <0x40000004>;
> + entry-latency-us = <702>;
> + exit-latency-us = <915>;
> + min-residency-us = <4001>;
> + local-timer-stop;
> + };
> +
> + BIG_CPU_SLEEP_0: cpu-sleep-1-0 {
> + compatible = "arm,idle-state";
> + idle-state-name = "big-power-down";
> + arm,psci-suspend-param = <0x40000003>;
> + entry-latency-us = <523>;
> + exit-latency-us = <1244>;
> + min-residency-us = <2207>;
> + local-timer-stop;
> + };
> +
> + BIG_CPU_SLEEP_1: cpu-sleep-1-1 {
> + compatible = "arm,idle-state";
> + idle-state-name = "big-rail-power-down";
> + arm,psci-suspend-param = <0x40000004>;
> + entry-latency-us = <526>;
> + exit-latency-us = <1854>;
> + min-residency-us = <5555>;
> + local-timer-stop;
> + };
> +
> + CLUSTER_SLEEP_0: cluster-sleep-0 {
> + compatible = "arm,idle-state";
> + idle-state-name = "cluster-power-down";
> + arm,psci-suspend-param = <0x40003444>;
> + entry-latency-us = <3263>;
> + exit-latency-us = <6562>;
> + min-residency-us = <9926>;
> + local-timer-stop;
> + };
> + };
> };
>
> memory@80000000 {
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
Reviewed-by: Srinivas Rao L <[email protected]>
Regards,
Srinivas.
On 2/21/2020 3:02 PM, Maulik Shah wrote:
> Currently rpmh ctrlr dirty flag is set for all cases regardless
> of data is really changed or not. Add changes to update it when
> data is updated to newer values.
>
> Also move dirty flag updates to happen from within cache_lock.
>
> Signed-off-by: Maulik Shah <[email protected]>
> ---
> drivers/soc/qcom/rpmh.c | 21 ++++++++++++++++-----
> 1 file changed, 16 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/soc/qcom/rpmh.c b/drivers/soc/qcom/rpmh.c
> index eb0ded0..83ba4e0 100644
> --- a/drivers/soc/qcom/rpmh.c
> +++ b/drivers/soc/qcom/rpmh.c
> @@ -139,20 +139,27 @@ static struct cache_req *cache_rpm_request(struct rpmh_ctrlr *ctrlr,
> existing:
> switch (state) {
> case RPMH_ACTIVE_ONLY_STATE:
> - if (req->sleep_val != UINT_MAX)
> + if (req->sleep_val != UINT_MAX) {
> req->wake_val = cmd->data;
> + ctrlr->dirty = true;
> + }
> break;
> case RPMH_WAKE_ONLY_STATE:
> - req->wake_val = cmd->data;
> + if (req->wake_val != cmd->data) {
> + req->wake_val = cmd->data;
> + ctrlr->dirty = true;
> + }
> break;
> case RPMH_SLEEP_STATE:
> - req->sleep_val = cmd->data;
> + if (req->sleep_val != cmd->data) {
> + req->sleep_val = cmd->data;
> + ctrlr->dirty = true;
> + }
> break;
> default:
> break;
> }
>
> - ctrlr->dirty = true;
> unlock:
> spin_unlock_irqrestore(&ctrlr->cache_lock, flags);
>
> @@ -287,6 +294,7 @@ static void cache_batch(struct rpmh_ctrlr *ctrlr, struct batch_cache_req *req)
>
> spin_lock_irqsave(&ctrlr->cache_lock, flags);
> list_add_tail(&req->list, &ctrlr->batch_cache);
> + ctrlr->dirty = true;
> spin_unlock_irqrestore(&ctrlr->cache_lock, flags);
> }
>
> @@ -323,6 +331,7 @@ static void invalidate_batch(struct rpmh_ctrlr *ctrlr)
> list_for_each_entry_safe(req, tmp, &ctrlr->batch_cache, list)
> kfree(req);
> INIT_LIST_HEAD(&ctrlr->batch_cache);
> + ctrlr->dirty = true;
> spin_unlock_irqrestore(&ctrlr->cache_lock, flags);
> }
>
> @@ -456,6 +465,7 @@ static int send_single(struct rpmh_ctrlr *ctrlr, enum rpmh_state state,
> int rpmh_flush(struct rpmh_ctrlr *ctrlr)
> {
> struct cache_req *p;
> + unsigned long flags;
> int ret;
>
> if (!ctrlr->dirty) {
> @@ -488,7 +498,9 @@ int rpmh_flush(struct rpmh_ctrlr *ctrlr)
> return ret;
> }
>
> + spin_lock_irqsave(&ctrlr->cache_lock, flags);
> ctrlr->dirty = false;
> + spin_unlock_irqrestore(&ctrlr->cache_lock, flags);
>
> return 0;
> }
> @@ -507,7 +519,6 @@ int rpmh_invalidate(const struct device *dev)
> int ret;
>
> invalidate_batch(ctrlr);
> - ctrlr->dirty = true;
>
> do {
> ret = rpmh_rsc_invalidate(ctrlr_to_drv(ctrlr));
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
As power domain support is dropped in v6 , please update commit text
accordingly.
Post the update of commit text, you can add my reviewed by.
Reviewed-by: Srinivas Rao L <[email protected]>
Regards,
Srinivas.
On 2/21/2020 3:02 PM, Maulik Shah wrote:
> Add changes to invoke rpmh flush when the data in cache is dirty.
>
> This is done only if OSI is not supported in PSCI. If OSI is supported
> rpmh_flush will get invoked by power domain off call when the last cpu
> in the domain is going to power collapse.
>
> Signed-off-by: Maulik Shah <[email protected]>
> ---
> drivers/soc/qcom/rpmh.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/soc/qcom/rpmh.c b/drivers/soc/qcom/rpmh.c
> index 83ba4e0..839af8d 100644
> --- a/drivers/soc/qcom/rpmh.c
> +++ b/drivers/soc/qcom/rpmh.c
> @@ -12,6 +12,7 @@
> #include <linux/module.h>
> #include <linux/of.h>
> #include <linux/platform_device.h>
> +#include <linux/psci.h>
> #include <linux/slab.h>
> #include <linux/spinlock.h>
> #include <linux/types.h>
> @@ -163,6 +164,9 @@ static struct cache_req *cache_rpm_request(struct rpmh_ctrlr *ctrlr,
> unlock:
> spin_unlock_irqrestore(&ctrlr->cache_lock, flags);
>
> + if (ctrlr->dirty && !psci_has_osi_support())
> + return rpmh_flush(ctrlr) ? ERR_PTR(-EINVAL) : req;
> +
> return req;
> }
>
> @@ -391,6 +395,8 @@ int rpmh_write_batch(const struct device *dev, enum rpmh_state state,
>
> if (state != RPMH_ACTIVE_ONLY_STATE) {
> cache_batch(ctrlr, req);
> + if (!psci_has_osi_support())
> + return rpmh_flush(ctrlr);
> return 0;
> }
>
--
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