[PATCH 03/10] interconnect: qcom: osm-l3: Add per-core EPSS L3 support

Bjorn Andersson
2022-10-28T03:42:22Z

The EPSS instance in e.g. SM8350 and SC8280XP has per-core L3 voting
enabled. In this configuration, the "shared" vote is done using the
REG_L3_VOTE register instead of PERF_STATE.

Rename epss_l3 to clarify that it's affecting the PERF_STATE register
and add a new L3_VOTE description. Given platform lineage it's assumed
that the L3_VOTE-based case will be the predominant one, so use this for
a new generic qcom,epss-l3 compatible.

While adding the EPSS generic, also add qcom,osm-l3.

Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
---
drivers/interconnect/qcom/osm-l3.c | 17 ++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/interconnect/qcom/osm-l3.c b/drivers/interconnect/qcom/osm-l3.c
index 7d6844253241..469be732a00b 100644
--- a/drivers/interconnect/qcom/osm-l3.c
+++ b/drivers/interconnect/qcom/osm-l3.c
@@ -34,6 +34,7 @@

/* EPSS Register offsets */
#define EPSS_LUT_ROW_SIZE 4
+#define EPSS_REG_L3_VOTE 0x90
#define EPSS_REG_FREQ_LUT 0x100
#define EPSS_REG_PERF_STATE 0x320

@@ -112,7 +113,7 @@ static const struct qcom_osm_l3_desc osm_l3 = {
.reg_perf_state = OSM_REG_PERF_STATE,
};

-static const struct qcom_osm_l3_desc epss_l3 = {
+static const struct qcom_osm_l3_desc epss_l3_perf_state = {
.nodes = epss_l3_nodes,
.num_nodes = ARRAY_SIZE(epss_l3_nodes),
.lut_row_size = EPSS_LUT_ROW_SIZE,
@@ -120,6 +121,14 @@ static const struct qcom_osm_l3_desc epss_l3 = {
.reg_perf_state = EPSS_REG_PERF_STATE,
};

+static const struct qcom_osm_l3_desc epss_l3_l3_vote = {
+ .nodes = epss_l3_nodes,
+ .num_nodes = ARRAY_SIZE(epss_l3_nodes),
+ .lut_row_size = EPSS_LUT_ROW_SIZE,
+ .reg_freq_lut = EPSS_REG_FREQ_LUT,
+ .reg_perf_state = EPSS_REG_L3_VOTE,
+};
+
static int qcom_osm_l3_set(struct icc_node *src, struct icc_node *dst)
{
struct qcom_osm_l3_icc_provider *qp;
@@ -285,12 +294,14 @@ static int qcom_osm_l3_probe(struct platform_device *pdev)
}

static const struct of_device_id osm_l3_of_match[] = {
+ { .compatible = "qcom,epss-l3", .data = &epss_l3_l3_vote },
+ { .compatible = "qcom,osm-l3", .data = &osm_l3 },
{ .compatible = "qcom,sc7180-osm-l3", .data = &osm_l3 },
- { .compatible = "qcom,sc7280-epss-l3", .data = &epss_l3 },
+ { .compatible = "qcom,sc7280-epss-l3", .data = &epss_l3_perf_state },
{ .compatible = "qcom,sdm845-osm-l3", .data = &osm_l3 },
{ .compatible = "qcom,sm8150-osm-l3", .data = &osm_l3 },
{ .compatible = "qcom,sc8180x-osm-l3", .data = &osm_l3 },
- { .compatible = "qcom,sm8250-epss-l3", .data = &epss_l3 },
+ { .compatible = "qcom,sm8250-epss-l3", .data = &epss_l3_perf_state },
{ }
};
MODULE_DEVICE_TABLE(of, osm_l3_of_match);
--
2.37.3