linux-kernel - [PATCH 4/4] interconnect: qcom: osm-l3: Use icc_sync

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Date:   Thu,  9 Jul 2020 14:07:05 +0300
From:   Georgi Djakov <georgi.djakov@...aro.org>
To:     linux-pm@...r.kernel.org
Cc:     saravanak@...gle.com, mdtipton@...eaurora.org,
        okukatla@...eaurora.org, bjorn.andersson@...aro.org,
        vincent.guittot@...aro.org, georgi.djakov@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 4/4] interconnect: qcom: osm-l3: Use icc_sync_state

Lowering the bandwidth on the bus might have negative consequences if
it's done before all consumers had a chance to cast their vote. Let's
return the maximum amount of bandwidth as initial value. This bandwidth
level would be maintained until all consumers have probed.

Signed-off-by: Georgi Djakov <georgi.djakov@...aro.org>
---
 drivers/interconnect/qcom/osm-l3.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/interconnect/qcom/osm-l3.c b/drivers/interconnect/qcom/osm-l3.c
index 96fb9ff5ff2e..532d541b71be 100644
--- a/drivers/interconnect/qcom/osm-l3.c
+++ b/drivers/interconnect/qcom/osm-l3.c
@@ -137,6 +137,13 @@ static int qcom_osm_l3_remove(struct platform_device *pdev)
 	return icc_provider_del(&qp->provider);
 }
 
+static int qcom_osm_l3_get_bw(struct icc_node *node, u32 *bw)
+{
+	*bw = INT_MAX;
+
+	return 0;
+}
+
 static int qcom_osm_l3_probe(struct platform_device *pdev)
 {
 	u32 info, src, lval, i, prev_freq = 0, freq;
@@ -215,6 +222,7 @@ static int qcom_osm_l3_probe(struct platform_device *pdev)
 	provider->dev = &pdev->dev;
 	provider->set = qcom_icc_set;
 	provider->aggregate = icc_std_aggregate;
+	provider->get_bw = qcom_osm_l3_get_bw;
 	provider->xlate = of_icc_xlate_onecell;
 	INIT_LIST_HEAD(&provider->nodes);
 	provider->data = data;
@@ -268,6 +276,7 @@ static struct platform_driver osm_l3_driver = {
 	.driver = {
 		.name = "osm-l3",
 		.of_match_table = osm_l3_of_match,
+		.sync_state = icc_sync_state,
 	},
 };
 module_platform_driver(osm_l3_driver);