Register a struct led_classdev with the kernel's LED subsystem and
create a throughput-based trigger for it. Then mac80211 makes the LED
blink.
Tested with Tenda U12 (RTL8812AU), Tenda U9 (RTL8811CU), TP-Link Archer
T2U Nano (RTL8811AU), TP-Link Archer T3U Plus (RTL8812BU), Edimax
EW-7611UCB (RTL8821AU), LM842 (RTL8822CU).
Also tested with devices which don't have LEDs: the laptop's internal
RTL8822CE and a no-name RTL8723DU.
Signed-off-by: Bitterblue Smith <rtl8821cerfe2@xxxxxxxxx>
---
v2:
- Move LED (de)init to a new file led.c
- Use #ifdef CONFIF_LEDS_CLASS only in the new file led.h
---
drivers/net/wireless/realtek/rtw88/Makefile | 2 +
drivers/net/wireless/realtek/rtw88/led.c | 73 +++++++++++++++++++
drivers/net/wireless/realtek/rtw88/led.h | 25 +++++++
drivers/net/wireless/realtek/rtw88/main.c | 12 ++-
drivers/net/wireless/realtek/rtw88/main.h | 5 ++
drivers/net/wireless/realtek/rtw88/reg.h | 12 +++
drivers/net/wireless/realtek/rtw88/rtw8812a.c | 17 +++++
drivers/net/wireless/realtek/rtw88/rtw8821a.c | 26 +++++++
drivers/net/wireless/realtek/rtw88/rtw8821c.c | 19 +++++
drivers/net/wireless/realtek/rtw88/rtw8822b.c | 19 +++++
drivers/net/wireless/realtek/rtw88/rtw8822c.c | 19 +++++
11 files changed, 227 insertions(+), 2 deletions(-)
create mode 100644 drivers/net/wireless/realtek/rtw88/led.c
create mode 100644 drivers/net/wireless/realtek/rtw88/led.h
diff --git a/drivers/net/wireless/realtek/rtw88/Makefile b/drivers/net/wireless/realtek/rtw88/Makefile
index f0b49f5a8a5a..e8bad9d099a4 100644
--- a/drivers/net/wireless/realtek/rtw88/Makefile
+++ b/drivers/net/wireless/realtek/rtw88/Makefile
@@ -20,6 +20,8 @@ rtw88_core-y += main.o \
rtw88_core-$(CONFIG_PM) += wow.o
+rtw88_core-$(CONFIG_LEDS_CLASS) += led.o
+
obj-$(CONFIG_RTW88_8822B) += rtw88_8822b.o
rtw88_8822b-objs := rtw8822b.o rtw8822b_table.o
diff --git a/drivers/net/wireless/realtek/rtw88/led.c b/drivers/net/wireless/realtek/rtw88/led.c
new file mode 100644
index 000000000000..aa50b2f0abff
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw88/led.c
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/* Copyright(c) 2025 Realtek Corporation
+ */
+
+#include "main.h"
+#include "debug.h"
+#include "led.h"
+
+static int rtw_led_set_blocking(struct led_classdev *led,
+ enum led_brightness brightness)
+{
+ struct rtw_dev *rtwdev = container_of(led, struct rtw_dev, led_cdev);
+
+ rtwdev->chip->ops->led_set(led, brightness);
+
+ return 0;
+}
+
+void rtw_led_init(struct rtw_dev *rtwdev)
+{
+ static const struct ieee80211_tpt_blink rtw_tpt_blink[] = {
+ { .throughput = 0 * 1024, .blink_time = 334 },
+ { .throughput = 1 * 1024, .blink_time = 260 },
+ { .throughput = 5 * 1024, .blink_time = 220 },
+ { .throughput = 10 * 1024, .blink_time = 190 },
+ { .throughput = 20 * 1024, .blink_time = 170 },
+ { .throughput = 50 * 1024, .blink_time = 150 },
+ { .throughput = 70 * 1024, .blink_time = 130 },
+ { .throughput = 100 * 1024, .blink_time = 110 },
+ { .throughput = 200 * 1024, .blink_time = 80 },
+ { .throughput = 300 * 1024, .blink_time = 50 },
+ };
+ struct led_classdev *led = &rtwdev->led_cdev;
+ int err;
+
+ if (!rtwdev->chip->ops->led_set)
+ return;
+
+ if (rtw_hci_type(rtwdev) == RTW_HCI_TYPE_USB)
+ led->brightness_set_blocking = rtw_led_set_blocking;
+ else
+ led->brightness_set = rtwdev->chip->ops->led_set;
+
+ snprintf(rtwdev->led_name, sizeof(rtwdev->led_name),
+ "rtw88-%s", dev_name(rtwdev->dev));
+
+ led->name = rtwdev->led_name;
+ led->max_brightness = LED_ON;
+ led->default_trigger =
+ ieee80211_create_tpt_led_trigger(rtwdev->hw,
+ IEEE80211_TPT_LEDTRIG_FL_RADIO,
+ rtw_tpt_blink,
+ ARRAY_SIZE(rtw_tpt_blink));
+
+ err = led_classdev_register(rtwdev->dev, led);
+ if (err) {
+ rtw_warn(rtwdev, "Failed to register the LED, error %d\n", err);
+ return;
+ }
+
+ rtwdev->led_registered = true;
+}
+
+void rtw_led_deinit(struct rtw_dev *rtwdev)
+{
+ struct led_classdev *led = &rtwdev->led_cdev;
+
+ if (!rtwdev->led_registered)
+ return;
+
+ rtwdev->chip->ops->led_set(led, LED_OFF);
+ led_classdev_unregister(led);
+}
diff --git a/drivers/net/wireless/realtek/rtw88/led.h b/drivers/net/wireless/realtek/rtw88/led.h
new file mode 100644
index 000000000000..9f0f21f1bb46
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw88/led.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
+/* Copyright(c) 2025 Realtek Corporation
+ */
+
+#ifndef __RTW_LED_H
+#define __RTW_LED_H
+
+#ifdef CONFIG_LEDS_CLASS
+
+void rtw_led_init(struct rtw_dev *rtwdev);
+void rtw_led_deinit(struct rtw_dev *rtwdev);
+
+#else
+
+static void rtw_led_init(struct rtw_dev *rtwdev)
+{
+}
+
+static void rtw_led_deinit(struct rtw_dev *rtwdev)
+{
+}
+
+#endif
+
+#endif
diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
index 6993f93c8f06..0cee0fd8c0ef 100644
--- a/drivers/net/wireless/realtek/rtw88/main.c
+++ b/drivers/net/wireless/realtek/rtw88/main.c
@@ -19,6 +19,7 @@
#include "bf.h"
#include "sar.h"
#include "sdio.h"
+#include "led.h"
bool rtw_disable_lps_deep_mode;
EXPORT_SYMBOL(rtw_disable_lps_deep_mode);
@@ -2292,16 +2293,18 @@ int rtw_register_hw(struct rtw_dev *rtwdev, struct ieee80211_hw *hw)
return ret;
}
+ rtw_led_init(rtwdev);
+
ret = ieee80211_register_hw(hw);
if (ret) {
rtw_err(rtwdev, "failed to register hw\n");
- return ret;
+ goto led_deinit;
}
ret = rtw_regd_hint(rtwdev);
if (ret) {
rtw_err(rtwdev, "failed to hint regd\n");
- return ret;
+ goto led_deinit;
}
rtw_debugfs_init(rtwdev);
@@ -2310,6 +2313,10 @@ int rtw_register_hw(struct rtw_dev *rtwdev, struct ieee80211_hw *hw)
rtwdev->bf_info.bfer_su_cnt = 0;
return 0;
+
+led_deinit:
+ rtw_led_deinit(rtwdev);
+ return ret;
}
EXPORT_SYMBOL(rtw_register_hw);
@@ -2320,6 +2327,7 @@ void rtw_unregister_hw(struct rtw_dev *rtwdev, struct ieee80211_hw *hw)
ieee80211_unregister_hw(hw);
rtw_unset_supported_band(hw, chip);
rtw_debugfs_deinit(rtwdev);
+ rtw_led_deinit(rtwdev);
}
EXPORT_SYMBOL(rtw_unregister_hw);
diff --git a/drivers/net/wireless/realtek/rtw88/main.h b/drivers/net/wireless/realtek/rtw88/main.h
index 6ba9e0dcf9fd..62cd4c526301 100644
--- a/drivers/net/wireless/realtek/rtw88/main.h
+++ b/drivers/net/wireless/realtek/rtw88/main.h
@@ -887,6 +887,7 @@ struct rtw_chip_ops {
bool is_tx2_path);
void (*config_txrx_mode)(struct rtw_dev *rtwdev, u8 tx_path,
u8 rx_path, bool is_tx2_path);
+ void (*led_set)(struct led_classdev *led, enum led_brightness brightness);
/* for USB/SDIO only */
void (*fill_txdesc_checksum)(struct rtw_dev *rtwdev,
struct rtw_tx_pkt_info *pkt_info,
@@ -2097,6 +2098,10 @@ struct rtw_dev {
struct completion fw_scan_density;
bool ap_active;
+ bool led_registered;
+ char led_name[32];
+ struct led_classdev led_cdev;
+
/* hci related data, must be last */
u8 priv[] __aligned(sizeof(void *));
};
diff --git a/drivers/net/wireless/realtek/rtw88/reg.h b/drivers/net/wireless/realtek/rtw88/reg.h
index 95a39ae74cd3..e438405fba56 100644
--- a/drivers/net/wireless/realtek/rtw88/reg.h
+++ b/drivers/net/wireless/realtek/rtw88/reg.h
@@ -78,7 +78,19 @@
#define BIT_PAPE_SEL_EN BIT(25)
#define BIT_DPDT_WL_SEL BIT(24)
#define BIT_DPDT_SEL_EN BIT(23)
+#define BIT_GPIO13_14_WL_CTRL_EN BIT(22)
+#define BIT_LED2_SV BIT(19)
+#define BIT_LED2_CM GENMASK(18, 16)
+#define BIT_LED1_SV BIT(11)
+#define BIT_LED1_CM GENMASK(10, 8)
+#define BIT_LED0_SV BIT(3)
+#define BIT_LED0_CM GENMASK(2, 0)
+#define BIT_LED_MODE_SW_CTRL 0
+#define BIT_LED_MODE_RX 6
+#define BIT_LED_MODE_TX 4
+#define BIT_LED_MODE_TRX 2
#define REG_LEDCFG2 0x004E
+#define REG_GPIO_PIN_CTRL_2 0x0060
#define REG_PAD_CTRL1 0x0064
#define BIT_BT_BTG_SEL BIT(31)
#define BIT_PAPE_WLBT_SEL BIT(29)
diff --git a/drivers/net/wireless/realtek/rtw88/rtw8812a.c b/drivers/net/wireless/realtek/rtw88/rtw8812a.c
index 21795286a1a0..f9ba2aa2928a 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8812a.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8812a.c
@@ -868,6 +868,22 @@ static void rtw8812a_pwr_track(struct rtw_dev *rtwdev)
dm_info->pwr_trk_triggered = false;
}
+static void rtw8812a_led_set(struct led_classdev *led,
+ enum led_brightness brightness)
+{
+ struct rtw_dev *rtwdev = container_of(led, struct rtw_dev, led_cdev);
+ u8 ledcfg;
+
+ ledcfg = rtw_read8(rtwdev, REG_LED_CFG);
+ ledcfg &= BIT(6) | BIT(4);
+ ledcfg |= BIT(5);
+
+ if (brightness == LED_OFF)
+ ledcfg |= BIT(3);
+
+ rtw_write8(rtwdev, REG_LED_CFG, ledcfg);
+}
+
static void rtw8812a_fill_txdesc_checksum(struct rtw_dev *rtwdev,
struct rtw_tx_pkt_info *pkt_info,
u8 *txdesc)
@@ -916,6 +932,7 @@ static const struct rtw_chip_ops rtw8812a_ops = {
.config_bfee = NULL,
.set_gid_table = NULL,
.cfg_csi_rate = NULL,
+ .led_set = rtw8812a_led_set,
.fill_txdesc_checksum = rtw8812a_fill_txdesc_checksum,
.coex_set_init = rtw8812a_coex_cfg_init,
.coex_set_ant_switch = NULL,
diff --git a/drivers/net/wireless/realtek/rtw88/rtw8821a.c b/drivers/net/wireless/realtek/rtw88/rtw8821a.c
index dafab2af33bc..f68239b07319 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8821a.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8821a.c
@@ -706,6 +706,31 @@ static void rtw8821a_pwr_track(struct rtw_dev *rtwdev)
dm_info->pwr_trk_triggered = false;
}
+static void rtw8821a_led_set(struct led_classdev *led,
+ enum led_brightness brightness)
+{
+ struct rtw_dev *rtwdev = container_of(led, struct rtw_dev, led_cdev);
+ u32 gpio8_cfg;
+ u8 ledcfg;
+
+ if (brightness == LED_OFF) {
+ gpio8_cfg = rtw_read32(rtwdev, REG_GPIO_PIN_CTRL_2);
+ gpio8_cfg &= ~BIT(24);
+ gpio8_cfg |= BIT(16) | BIT(8);
+ rtw_write32(rtwdev, REG_GPIO_PIN_CTRL_2, gpio8_cfg);
+ } else {
+ ledcfg = rtw_read8(rtwdev, REG_LED_CFG + 2);
+ gpio8_cfg = rtw_read32(rtwdev, REG_GPIO_PIN_CTRL_2);
+
+ ledcfg &= BIT(7) | BIT(6);
+ rtw_write8(rtwdev, REG_LED_CFG + 2, ledcfg);
+
+ gpio8_cfg &= ~(BIT(24) | BIT(8));
+ gpio8_cfg |= BIT(16);
+ rtw_write32(rtwdev, REG_GPIO_PIN_CTRL_2, gpio8_cfg);
+ }
+}
+
static void rtw8821a_fill_txdesc_checksum(struct rtw_dev *rtwdev,
struct rtw_tx_pkt_info *pkt_info,
u8 *txdesc)
@@ -853,6 +878,7 @@ static const struct rtw_chip_ops rtw8821a_ops = {
.config_bfee = NULL,
.set_gid_table = NULL,
.cfg_csi_rate = NULL,
+ .led_set = rtw8821a_led_set,
.fill_txdesc_checksum = rtw8821a_fill_txdesc_checksum,
.coex_set_init = rtw8821a_coex_cfg_init,
.coex_set_ant_switch = rtw8821a_coex_cfg_ant_switch,
diff --git a/drivers/net/wireless/realtek/rtw88/rtw8821c.c b/drivers/net/wireless/realtek/rtw88/rtw8821c.c
index 0270225b9c20..eb7e34c545d0 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8821c.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8821c.c
@@ -1206,6 +1206,24 @@ static void rtw8821c_phy_cck_pd_set(struct rtw_dev *rtwdev, u8 new_lvl)
dm_info->cck_pd_default + new_lvl * 2);
}
+static void rtw8821c_led_set(struct led_classdev *led,
+ enum led_brightness brightness)
+{
+ struct rtw_dev *rtwdev = container_of(led, struct rtw_dev, led_cdev);
+ u32 ledcfg;
+
+ ledcfg = rtw_read32(rtwdev, REG_LED_CFG);
+ u32p_replace_bits(&ledcfg, BIT_LED_MODE_SW_CTRL, BIT_LED2_CM);
+ ledcfg &= ~BIT_GPIO13_14_WL_CTRL_EN;
+
+ if (brightness == LED_OFF)
+ ledcfg |= BIT_LED2_SV;
+ else
+ ledcfg &= ~BIT_LED2_SV;
+
+ rtw_write32(rtwdev, REG_LED_CFG, ledcfg);
+}
+
static void rtw8821c_fill_txdesc_checksum(struct rtw_dev *rtwdev,
struct rtw_tx_pkt_info *pkt_info,
u8 *txdesc)
@@ -1655,6 +1673,7 @@ static const struct rtw_chip_ops rtw8821c_ops = {
.config_bfee = rtw8821c_bf_config_bfee,
.set_gid_table = rtw_bf_set_gid_table,
.cfg_csi_rate = rtw_bf_cfg_csi_rate,
+ .led_set = rtw8821c_led_set,
.fill_txdesc_checksum = rtw8821c_fill_txdesc_checksum,
.coex_set_init = rtw8821c_coex_cfg_init,
diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822b.c b/drivers/net/wireless/realtek/rtw88/rtw8822b.c
index 739809f4cab5..7f03903ddf4b 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8822b.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8822b.c
@@ -1566,6 +1566,24 @@ static void rtw8822b_adaptivity(struct rtw_dev *rtwdev)
rtw_phy_set_edcca_th(rtwdev, l2h, h2l);
}
+static void rtw8822b_led_set(struct led_classdev *led,
+ enum led_brightness brightness)
+{
+ struct rtw_dev *rtwdev = container_of(led, struct rtw_dev, led_cdev);
+ u32 ledcfg;
+
+ ledcfg = rtw_read32(rtwdev, REG_LED_CFG);
+ u32p_replace_bits(&ledcfg, BIT_LED_MODE_SW_CTRL, BIT_LED2_CM);
+ ledcfg &= ~BIT_GPIO13_14_WL_CTRL_EN;
+
+ if (brightness == LED_OFF)
+ ledcfg |= BIT_LED2_SV;
+ else
+ ledcfg &= ~BIT_LED2_SV;
+
+ rtw_write32(rtwdev, REG_LED_CFG, ledcfg);
+}
+
static void rtw8822b_fill_txdesc_checksum(struct rtw_dev *rtwdev,
struct rtw_tx_pkt_info *pkt_info,
u8 *txdesc)
@@ -2146,6 +2164,7 @@ static const struct rtw_chip_ops rtw8822b_ops = {
.cfg_csi_rate = rtw_bf_cfg_csi_rate,
.adaptivity_init = rtw8822b_adaptivity_init,
.adaptivity = rtw8822b_adaptivity,
+ .led_set = rtw8822b_led_set,
.fill_txdesc_checksum = rtw8822b_fill_txdesc_checksum,
.coex_set_init = rtw8822b_coex_cfg_init,
diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822c.c b/drivers/net/wireless/realtek/rtw88/rtw8822c.c
index af6b76937f1d..ec362a817f5f 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8822c.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8822c.c
@@ -4537,6 +4537,24 @@ static void rtw8822c_adaptivity(struct rtw_dev *rtwdev)
rtw_phy_set_edcca_th(rtwdev, l2h, h2l);
}
+static void rtw8822c_led_set(struct led_classdev *led,
+ enum led_brightness brightness)
+{
+ struct rtw_dev *rtwdev = container_of(led, struct rtw_dev, led_cdev);
+ u32 ledcfg;
+
+ ledcfg = rtw_read32(rtwdev, REG_LED_CFG);
+ u32p_replace_bits(&ledcfg, BIT_LED_MODE_SW_CTRL, BIT_LED2_CM);
+ ledcfg &= ~BIT_GPIO13_14_WL_CTRL_EN;
+
+ if (brightness == LED_OFF)
+ ledcfg |= BIT_LED2_SV;
+ else
+ ledcfg &= ~BIT_LED2_SV;
+
+ rtw_write32(rtwdev, REG_LED_CFG, ledcfg);
+}
+
static void rtw8822c_fill_txdesc_checksum(struct rtw_dev *rtwdev,
struct rtw_tx_pkt_info *pkt_info,
u8 *txdesc)
@@ -4964,6 +4982,7 @@ static const struct rtw_chip_ops rtw8822c_ops = {
.cfo_track = rtw8822c_cfo_track,
.config_tx_path = rtw8822c_config_tx_path,
.config_txrx_mode = rtw8822c_config_trx_mode,
+ .led_set = rtw8822c_led_set,
.fill_txdesc_checksum = rtw8822c_fill_txdesc_checksum,
.coex_set_init = rtw8822c_coex_cfg_init,
--
2.47.1
