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From cea03be5a848823cb8052e2e7b93cb2249d5f60c Mon Sep 17 00:00:00 2001
From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Date: Sun, 16 Oct 2016 22:59:07 +0200
Subject: [PATCH 3/3] ath9k: parse the device configuration from an OF node
This allows setting the MAC address and specifying that the firmware
will be requested from userspace (because there might not be a hardware
EEPROM connected to the chip) for ath9k based PCI devices using
the device tree.
There is some out-of-tree code to "convert devicetree to
ath9k_platform_data" (for example in OpenWrt and LEDE) which becomes
obsolete with this patch.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
---
drivers/net/wireless/ath/ath9k/init.c | 42 +++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -20,6 +20,8 @@
#include <linux/slab.h>
#include <linux/ath9k_platform.h>
#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_net.h>
#include <linux/relay.h>
#include <net/ieee80211_radiotap.h>
@@ -554,6 +556,42 @@ static int ath9k_init_platform(struct at
return 0;
}
+static int ath9k_of_init(struct ath_softc *sc)
+{
+ struct device_node *np = sc->dev->of_node;
+ struct ath_hw *ah = sc->sc_ah;
+ struct ath_common *common = ath9k_hw_common(ah);
+ enum ath_bus_type bus_type = common->bus_ops->ath_bus_type;
+ const char *mac;
+ char eeprom_name[100];
+ int ret;
+
+ if (!of_device_is_available(np))
+ return 0;
+
+ ath_dbg(common, CONFIG, "parsing configuration from OF node\n");
+
+ if (of_property_read_bool(np, "qca,no-eeprom")) {
+ /* ath9k-eeprom-<bus>-<id>.bin */
+ scnprintf(eeprom_name, sizeof(eeprom_name),
+ "ath9k-eeprom-%s-%s.bin",
+ ath_bus_type_to_string(bus_type), dev_name(ah->dev));
+
+ ret = ath9k_eeprom_request(sc, eeprom_name);
+ if (ret)
+ return ret;
+ }
+
+ mac = of_get_mac_address(np);
+ if (mac)
+ ether_addr_copy(common->macaddr, mac);
+
+ ah->ah_flags &= ~AH_USE_EEPROM;
+ ah->ah_flags |= AH_NO_EEP_SWAP;
+
+ return 0;
+}
+
static int ath9k_init_softc(u16 devid, struct ath_softc *sc,
const struct ath_bus_ops *bus_ops)
{
@@ -610,6 +648,10 @@ static int ath9k_init_softc(u16 devid, s
if (ret)
return ret;
+ ret = ath9k_of_init(sc);
+ if (ret)
+ return ret;
+
if (ath9k_led_active_high != -1)
ah->config.led_active_high = ath9k_led_active_high == 1;
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