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--- a/arch/mips/ath79/dev-wmac.c
+++ b/arch/mips/ath79/dev-wmac.c
@@ -18,9 +18,11 @@
#include <linux/etherdevice.h>
#include <linux/platform_device.h>
#include <linux/ath9k_platform.h>
+#include <linux/gpio.h>
#include <asm/mach-ath79/ath79.h>
#include <asm/mach-ath79/ar71xx_regs.h>
+#include "common.h"
#include "dev-wmac.h"
static u8 ath79_wmac_mac[ETH_ALEN];
@@ -313,6 +315,51 @@ void __init ath79_wmac_set_tx_gain_buffa
ath79_wmac_data.tx_gain_buffalo = true;
}
+static int ath79_request_ext_lna_gpio(unsigned chain, int gpio)
+{
+ char buf[32];
+ char *label;
+ int err;
+
+ scnprintf(buf, sizeof(buf), "external LNA%u", chain);
+ label = kstrdup(buf, GFP_KERNEL);
+
+ err = gpio_request_one(gpio, GPIOF_DIR_OUT | GPIOF_INIT_LOW, label);
+ if (err) {
+ pr_err("unable to request GPIO%d for external LNA%u\n",
+ gpio, chain);
+ kfree(label);
+ }
+
+ return err;
+}
+
+static void ar934x_set_ext_lna_gpio(unsigned chain, int gpio)
+{
+ unsigned int sel;
+ int err;
+
+ if (WARN_ON(chain > 1))
+ return;
+
+ err = ath79_request_ext_lna_gpio(chain, gpio);
+ if (err)
+ return;
+
+ if (chain == 0)
+ sel = AR934X_GPIO_OUT_EXT_LNA0;
+ else
+ sel = AR934X_GPIO_OUT_EXT_LNA1;
+
+ ath79_gpio_output_select(gpio, sel);
+}
+
+void __init ath79_wmac_set_ext_lna_gpio(unsigned chain, int gpio)
+{
+ if (soc_is_ar934x())
+ ar934x_set_ext_lna_gpio(chain, gpio);
+}
+
void __init ath79_register_wmac(u8 *cal_data, u8 *mac_addr)
{
if (soc_is_ar913x())
--- a/arch/mips/ath79/dev-wmac.h
+++ b/arch/mips/ath79/dev-wmac.h
@@ -17,6 +17,7 @@ void ath79_register_wmac_simple(void);
void ath79_wmac_disable_2ghz(void);
void ath79_wmac_disable_5ghz(void);
void ath79_wmac_set_tx_gain_buffalo(void);
+void ath79_wmac_set_ext_lna_gpio(unsigned chain, int gpio);
bool ar93xx_wmac_read_mac_address(u8 *dest);
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