linux-kernel - [PATCH V2 3/3] wifi: ath11k: support reading radio MAC from DT

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Message-Id: <20230418093822.24005-3-zajec5@gmail.com>
Date:   Tue, 18 Apr 2023 11:38:22 +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 3/3] wifi: ath11k: support reading radio MAC from DT

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

On some devices (most routers) MAC is stored in an NVMEM cell. Support
reading it.

Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
---
 drivers/net/wireless/ath/ath11k/mac.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c
index ad5a22d12bd3..6550bb5b2ece 100644
--- a/drivers/net/wireless/ath/ath11k/mac.c
+++ b/drivers/net/wireless/ath/ath11k/mac.c
@@ -8,6 +8,7 @@
 #include <linux/etherdevice.h>
 #include <linux/bitfield.h>
 #include <linux/inetdevice.h>
+#include <linux/of_net.h>
 #include <net/if_inet6.h>
 #include <net/ipv6.h>
 
@@ -9292,7 +9293,7 @@ int ath11k_mac_register(struct ath11k_base *ab)
 	struct ath11k_pdev *pdev;
 	int i;
 	int ret;
-	u8 mac_addr[ETH_ALEN] = {0};
+	u8 device_mac_addr[ETH_ALEN] = {0};
 
 	if (test_bit(ATH11K_FLAG_REGISTERED, &ab->dev_flags))
 		return 0;
@@ -9305,18 +9306,22 @@ int ath11k_mac_register(struct ath11k_base *ab)
 	if (ret)
 		return ret;
 
-	device_get_mac_address(ab->dev, mac_addr);
+	device_get_mac_address(ab->dev, device_mac_addr);
 
 	for (i = 0; i < ab->num_radios; i++) {
+		u8 radio_mac_addr[ETH_ALEN];
+
 		pdev = &ab->pdevs[i];
 		ar = pdev->ar;
-		if (ab->pdevs_macaddr_valid) {
+		if (!of_get_mac_address(ar->np, radio_mac_addr)) {
+			ether_addr_copy(ar->mac_addr, radio_mac_addr);
+		} else if (ab->pdevs_macaddr_valid) {
 			ether_addr_copy(ar->mac_addr, pdev->mac_addr);
 		} else {
-			if (is_zero_ether_addr(mac_addr))
+			if (is_zero_ether_addr(device_mac_addr))
 				ether_addr_copy(ar->mac_addr, ab->mac_addr);
 			else
-				ether_addr_copy(ar->mac_addr, mac_addr);
+				ether_addr_copy(ar->mac_addr, device_mac_addr);
 			ar->mac_addr[4] += i;
 		}
 
-- 
2.34.1