linux-kernel - [PATCH V2 2/3] wifi: ath11k: look for DT node for each radio

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Message-Id: <20230418093822.24005-2-zajec5@gmail.com>
Date:   Tue, 18 Apr 2023 11:38:21 +0200
From:   Rafał Miłecki <zajec5@...il.com>
To:     Kalle Valo <kvalo@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, ath11k@...ts.infradead.org,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Robert Marko <robimarko@...il.com>,
        Rafał Miłecki <rafal@...ecki.pl>
Subject: [PATCH V2 2/3] wifi: ath11k: look for DT node for each radio

From: Rafał Miłecki <rafal@...ecki.pl>

Updated DT binding allows describing each chip radio.

Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
---
 drivers/net/wireless/ath/ath11k/core.h |  2 ++
 drivers/net/wireless/ath/ath11k/mac.c  | 20 ++++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h
index 0830276e5028..1a583adf2ab1 100644
--- a/drivers/net/wireless/ath/ath11k/core.h
+++ b/drivers/net/wireless/ath/ath11k/core.h
@@ -13,6 +13,7 @@
 #include <linux/bitfield.h>
 #include <linux/dmi.h>
 #include <linux/ctype.h>
+#include <linux/of.h>
 #include <linux/rhashtable.h>
 #include <linux/average.h>
 #include "qmi.h"
@@ -592,6 +593,7 @@ struct ath11k_per_peer_tx_stats {
 struct ath11k {
 	struct ath11k_base *ab;
 	struct ath11k_pdev *pdev;
+	struct device_node *np;
 	struct ieee80211_hw *hw;
 	struct ieee80211_ops *ops;
 	struct ath11k_pdev_wmi *wmi;
diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c
index cad832e0e6b8..ad5a22d12bd3 100644
--- a/drivers/net/wireless/ath/ath11k/mac.c
+++ b/drivers/net/wireless/ath/ath11k/mac.c
@@ -9344,6 +9344,25 @@ int ath11k_mac_register(struct ath11k_base *ab)
 	return ret;
 }
 
+static struct device_node *ath11k_mac_find_radio_node(struct ath11k_base *ab, int i)
+{
+	struct device_node *np;
+
+	for_each_child_of_node(ab->dev->of_node, np) {
+		u32 reg;
+		int err;
+
+		if (strcmp(np->name, "radio"))
+			continue;
+
+		err = of_property_read_u32(np, "reg", &reg);
+		if (!err && reg == i)
+			return np;
+	}
+
+	return NULL;
+}
+
 int ath11k_mac_allocate(struct ath11k_base *ab)
 {
 	struct ieee80211_hw *hw;
@@ -9369,6 +9388,7 @@ int ath11k_mac_allocate(struct ath11k_base *ab)
 		ar->ab = ab;
 		ar->pdev = pdev;
 		ar->pdev_idx = i;
+		ar->np = ath11k_mac_find_radio_node(ab, i);
 		ar->lmac_id = ath11k_hw_get_mac_from_pdev_id(&ab->hw_params, i);
 
 		ar->wmi = &ab->wmi_ab.wmi[i];
-- 
2.34.1