[PATCH v2 2/3] soc: qcom: stats: Add stats compatible and config for Shikra

[Sneh Mankad]

SoC LPM stats are present in RPM MSGRAM and subsystem LPM stats are
present in SMEM for Shikra.

For earlier targets using RPM processor like msm8974, rpm_master_stat.c was
used for subsystem LPM stats since those stats were populated in RPM
MSGRAM.

Here is a brief summary of previous targets and their stats configuration,
along with the drivers used to display them.

+---------------|----------------------------|---------------------------+
| SoC           | subsystem LPM stats        | SoC LPM stats             |
|---------------|----------------------------|---------------------------|
| msm8974,      | RPM processor MSGRAM       | RPM processor MSGRAM      |
| msm8226       | (rpm_master_stat.c)        | (qcom_stats.c)            |
|---------------|----------------------------|---------------------------|
| sm6350,       | SMEM (DDR)                 | AOP processor MSGRAM      |
| sdm845, etc.  | (qcom_stats.c)             | (qcom_stats.c)            |
|---------------|----------------------------|---------------------------|
| Shikra        | SMEM (DDR)                 | RPM processor MSGRAM      |
|               | (qcom_stats.c)             | (qcom_stats.c)            |
+---------------|----------------------------|---------------------------+

qcom_stats.c supports both the configurations for shikra, reading subsystem
LPM stats from SMEM and reading SoC LPM stats from RPM MSGRAM.

A generic "qcom,rpm-stats" compatible only reads SoC LPM stats like vmin
and vlow. Add shikra rpm compatible and config to read subsystem LPM
stats too along with SoC LPM stats.

Below is an example showing LPM stats for "apss" subsystem with this
change:

cat /sys/kernel/debug/qcom_stats/apss
Count: 2192
Last Entered At: 5498618336
Last Exited At: 5498708046
Accumulated Duration: 2046572620.

Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>
Reviewed-by: Maulik Shah <maulik.shah@xxxxxxxxxxxxxxxx>
Signed-off-by: Sneh Mankad <sneh.mankad@xxxxxxxxxxxxxxxx>
---
 drivers/soc/qcom/qcom_stats.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/soc/qcom/qcom_stats.c b/drivers/soc/qcom/qcom_stats.c
index 2e380faf9080354fae120e74f0b9bd1f3786d3e5..2f1615e583bbc6ea596d8b73d9bb0a2a00953cfb 100644
--- a/drivers/soc/qcom/qcom_stats.c
+++ b/drivers/soc/qcom/qcom_stats.c
@@ -376,6 +376,14 @@ static const struct stats_config rpm_data_dba0 = {
 	.subsystem_stats_in_smem = false,
 };
 
+static const struct stats_config rpm_data_shikra = {
+	.stats_offset = 0,
+	.num_records = 2,
+	.appended_stats_avail = true,
+	.dynamic_offset = true,
+	.subsystem_stats_in_smem = true,
+};
+
 static const struct stats_config rpmh_data_sdm845 = {
 	.stats_offset = 0x48,
 	.num_records = 2,
@@ -401,6 +409,7 @@ static const struct of_device_id qcom_stats_table[] = {
 	{ .compatible = "qcom,rpm-stats", .data = &rpm_data },
 	{ .compatible = "qcom,rpmh-stats", .data = &rpmh_data },
 	{ .compatible = "qcom,sdm845-rpmh-stats", .data = &rpmh_data_sdm845 },
+	{ .compatible = "qcom,shikra-rpm-stats", .data = &rpm_data_shikra },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, qcom_stats_table);

-- 
2.34.1