| Message ID | 5c03ae42-a2fd-b39a-e754-f52d8528a167@gmail.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Delegated to: | Kalle Valo |
| Headers | show |
| Series | [1/4] wifi: rtl8xxxu: Register the LED and make it blink | expand |
> -----Original Message----- > From: Bitterblue Smith <rtl8821cerfe2@gmail.com> > Sent: Wednesday, January 18, 2023 6:03 AM > To: linux-wireless@vger.kernel.org > Cc: Jes Sorensen <Jes.Sorensen@gmail.com>; Ping-Ke Shih <pkshih@realtek.com> > Subject: [PATCH 1/4] wifi: rtl8xxxu: Register the LED and make it blink > > If the chip can have an LED, register a struct led_classdev and enable > hardware-controlled blinking. When the chip is not transmitting or > receiving anything the LED is off. Otherwise the LED will blink > faster or slower according to the throughput. > > The LED can be controlled from userspace by writing 0, 1, or 2 to > /sys/class/leds/rtl8xxxu-usbX-Y/brightness: > 0 - solid off. > 1 - solid on. > 2 - hardware-controlled blinking. So, do you like #define RTL8XXXU_HW_LED_BLINKING 2 > > In this patch none of the chips advertise having an LED. That will be > added in the next patches. > > Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com> > --- > .../net/wireless/realtek/rtl8xxxu/rtl8xxxu.h | 8 +++++ > .../wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 34 +++++++++++++++++++ > 2 files changed, 42 insertions(+) > > diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h > b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h > index 90268479d3ad..c8cee4a24755 100644 > --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h > +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h > @@ -1443,6 +1443,8 @@ struct rtl8xxxu_cfo_tracking { > u32 packet_count_pre; > }; > > +#define RTL8XXXU_HW_LED_CONTROL 2 > + > struct rtl8xxxu_priv { > struct ieee80211_hw *hw; > struct usb_device *udev; > @@ -1564,6 +1566,10 @@ struct rtl8xxxu_priv { > struct rtl8xxxu_ra_report ra_report; > struct rtl8xxxu_cfo_tracking cfo_tracking; > struct rtl8xxxu_ra_info ra_info; > + > + bool led_registered; > + char led_name[32]; > + struct led_classdev led_cdev; > }; > > struct rtl8xxxu_rx_urb { > @@ -1613,6 +1619,8 @@ struct rtl8xxxu_fileops { > u32 rts_rate); > void (*set_crystal_cap) (struct rtl8xxxu_priv *priv, u8 crystal_cap); > s8 (*cck_rssi) (struct rtl8xxxu_priv *priv, u8 cck_agc_rpt); > + int (*led_classdev_brightness_set) (struct led_classdev *led_cdev, > + enum led_brightness brightness); > int writeN_block_size; > int rx_agg_buf_size; > char tx_desc_size; > diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c > b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c > index 35dc777c1fba..b27edd503c23 100644 > --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c > +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c > @@ -6955,6 +6955,34 @@ static int rtl8xxxu_parse_usb(struct rtl8xxxu_priv *priv, > return ret; > } > > +static void rtl8xxxu_init_led(struct rtl8xxxu_priv *priv) > +{ > + struct led_classdev *led = &priv->led_cdev; > + > + led->brightness_set_blocking = priv->fops->led_classdev_brightness_set; > + > + snprintf(priv->led_name, sizeof(priv->led_name), > + "rtl8xxxu-usb%s", dev_name(&priv->udev->dev)); > + led->name = priv->led_name; > + led->max_brightness = RTL8XXXU_HW_LED_CONTROL; > + > + if (led_classdev_register(&priv->udev->dev, led)) > + return; > + > + priv->led_registered = true; > + > + led->brightness = led->max_brightness; > + priv->fops->led_classdev_brightness_set(led, led->brightness); > +} > + > +static void rtl8xxxu_deinit_led(struct rtl8xxxu_priv *priv) > +{ > + struct led_classdev *led = &priv->led_cdev; > + > + priv->fops->led_classdev_brightness_set(led, LED_OFF); > + led_classdev_unregister(led); > +} > + > static int rtl8xxxu_probe(struct usb_interface *interface, > const struct usb_device_id *id) > { > @@ -7135,6 +7163,9 @@ static int rtl8xxxu_probe(struct usb_interface *interface, > goto err_set_intfdata; > } > > + if (priv->fops->led_classdev_brightness_set) I prefer to move this checking statement into rtl8xxxu_init_led(). Then, the flow of rtl8xxxu_probe() looks clean. As well as rtl8xxxu_deinit_led(). Just soft suggestion. > + rtl8xxxu_init_led(priv); > + > return 0; > > err_set_intfdata: > @@ -7159,6 +7190,9 @@ static void rtl8xxxu_disconnect(struct usb_interface *interface) > hw = usb_get_intfdata(interface); > priv = hw->priv; > > + if (priv->led_registered) > + rtl8xxxu_deinit_led(priv); > + > ieee80211_unregister_hw(hw); > > priv->fops->power_off(priv); > -- > 2.38.0 > > ------Please consider the environment before printing this e-mail.
On 18/01/2023 02:52, Ping-Ke Shih wrote: > > >> -----Original Message----- >> From: Bitterblue Smith <rtl8821cerfe2@gmail.com> >> Sent: Wednesday, January 18, 2023 6:03 AM >> To: linux-wireless@vger.kernel.org >> Cc: Jes Sorensen <Jes.Sorensen@gmail.com>; Ping-Ke Shih <pkshih@realtek.com> >> Subject: [PATCH 1/4] wifi: rtl8xxxu: Register the LED and make it blink >> >> If the chip can have an LED, register a struct led_classdev and enable >> hardware-controlled blinking. When the chip is not transmitting or >> receiving anything the LED is off. Otherwise the LED will blink >> faster or slower according to the throughput. >> >> The LED can be controlled from userspace by writing 0, 1, or 2 to >> /sys/class/leds/rtl8xxxu-usbX-Y/brightness: >> 0 - solid off. >> 1 - solid on. >> 2 - hardware-controlled blinking. > > So, do you like > > #define RTL8XXXU_HW_LED_BLINKING 2 > I'm not sure what you mean. Can you elaborate? >> >> In this patch none of the chips advertise having an LED. That will be >> added in the next patches. >> >> Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com> >> --- >> .../net/wireless/realtek/rtl8xxxu/rtl8xxxu.h | 8 +++++ >> .../wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 34 +++++++++++++++++++ >> 2 files changed, 42 insertions(+) >> >> diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h >> b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h >> index 90268479d3ad..c8cee4a24755 100644 >> --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h >> +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h >> @@ -1443,6 +1443,8 @@ struct rtl8xxxu_cfo_tracking { >> u32 packet_count_pre; >> }; >> >> +#define RTL8XXXU_HW_LED_CONTROL 2 >> + >> struct rtl8xxxu_priv { >> struct ieee80211_hw *hw; >> struct usb_device *udev; >> @@ -1564,6 +1566,10 @@ struct rtl8xxxu_priv { >> struct rtl8xxxu_ra_report ra_report; >> struct rtl8xxxu_cfo_tracking cfo_tracking; >> struct rtl8xxxu_ra_info ra_info; >> + >> + bool led_registered; >> + char led_name[32]; >> + struct led_classdev led_cdev; >> }; >> >> struct rtl8xxxu_rx_urb { >> @@ -1613,6 +1619,8 @@ struct rtl8xxxu_fileops { >> u32 rts_rate); >> void (*set_crystal_cap) (struct rtl8xxxu_priv *priv, u8 crystal_cap); >> s8 (*cck_rssi) (struct rtl8xxxu_priv *priv, u8 cck_agc_rpt); >> + int (*led_classdev_brightness_set) (struct led_classdev *led_cdev, >> + enum led_brightness brightness); >> int writeN_block_size; >> int rx_agg_buf_size; >> char tx_desc_size; >> diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c >> b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c >> index 35dc777c1fba..b27edd503c23 100644 >> --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c >> +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c >> @@ -6955,6 +6955,34 @@ static int rtl8xxxu_parse_usb(struct rtl8xxxu_priv *priv, >> return ret; >> } >> >> +static void rtl8xxxu_init_led(struct rtl8xxxu_priv *priv) >> +{ >> + struct led_classdev *led = &priv->led_cdev; >> + >> + led->brightness_set_blocking = priv->fops->led_classdev_brightness_set; >> + >> + snprintf(priv->led_name, sizeof(priv->led_name), >> + "rtl8xxxu-usb%s", dev_name(&priv->udev->dev)); >> + led->name = priv->led_name; >> + led->max_brightness = RTL8XXXU_HW_LED_CONTROL; >> + >> + if (led_classdev_register(&priv->udev->dev, led)) >> + return; >> + >> + priv->led_registered = true; >> + >> + led->brightness = led->max_brightness; >> + priv->fops->led_classdev_brightness_set(led, led->brightness); >> +} >> + >> +static void rtl8xxxu_deinit_led(struct rtl8xxxu_priv *priv) >> +{ >> + struct led_classdev *led = &priv->led_cdev; >> + >> + priv->fops->led_classdev_brightness_set(led, LED_OFF); >> + led_classdev_unregister(led); >> +} >> + >> static int rtl8xxxu_probe(struct usb_interface *interface, >> const struct usb_device_id *id) >> { >> @@ -7135,6 +7163,9 @@ static int rtl8xxxu_probe(struct usb_interface *interface, >> goto err_set_intfdata; >> } >> >> + if (priv->fops->led_classdev_brightness_set) > > I prefer to move this checking statement into rtl8xxxu_init_led(). Then, > the flow of rtl8xxxu_probe() looks clean. As well as rtl8xxxu_deinit_led(). > Just soft suggestion. > Okay. That works too. >> + rtl8xxxu_init_led(priv); >> + >> return 0; >> >> err_set_intfdata: >> @@ -7159,6 +7190,9 @@ static void rtl8xxxu_disconnect(struct usb_interface *interface) >> hw = usb_get_intfdata(interface); >> priv = hw->priv; >> >> + if (priv->led_registered) >> + rtl8xxxu_deinit_led(priv); >> + >> ieee80211_unregister_hw(hw); >> >> priv->fops->power_off(priv); >> -- >> 2.38.0 >> >> ------Please consider the environment before printing this e-mail.
> -----Original Message----- > From: Bitterblue Smith <rtl8821cerfe2@gmail.com> > Sent: Wednesday, January 18, 2023 9:53 PM > To: Ping-Ke Shih <pkshih@realtek.com>; linux-wireless@vger.kernel.org > Cc: Jes Sorensen <Jes.Sorensen@gmail.com> > Subject: Re: [PATCH 1/4] wifi: rtl8xxxu: Register the LED and make it blink > > On 18/01/2023 02:52, Ping-Ke Shih wrote: > > > > > >> -----Original Message----- > >> From: Bitterblue Smith <rtl8821cerfe2@gmail.com> > >> Sent: Wednesday, January 18, 2023 6:03 AM > >> To: linux-wireless@vger.kernel.org > >> Cc: Jes Sorensen <Jes.Sorensen@gmail.com>; Ping-Ke Shih <pkshih@realtek.com> > >> Subject: [PATCH 1/4] wifi: rtl8xxxu: Register the LED and make it blink > >> > >> If the chip can have an LED, register a struct led_classdev and enable > >> hardware-controlled blinking. When the chip is not transmitting or > >> receiving anything the LED is off. Otherwise the LED will blink > >> faster or slower according to the throughput. > >> > >> The LED can be controlled from userspace by writing 0, 1, or 2 to > >> /sys/class/leds/rtl8xxxu-usbX-Y/brightness: > >> 0 - solid off. > >> 1 - solid on. > >> 2 - hardware-controlled blinking. > > > > So, do you like > > > > #define RTL8XXXU_HW_LED_BLINKING 2 > > > I'm not sure what you mean. Can you elaborate? Originally, I would like to replace RTL8XXXU_HW_LED_CONTROL by RTL8XXXU_HW_LED_BLINKING, because commit messages say "blinking". After reviewing 2/4, 3/4 and 4/4, I aware that this blinking is hardware behavior. Then, it becomes hard to me to decide which name is clear. Anyway, original is fine to me. > > >> > >> In this patch none of the chips advertise having an LED. That will be > >> added in the next patches. > >> > >> Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com> > >> --- > >> .../net/wireless/realtek/rtl8xxxu/rtl8xxxu.h | 8 +++++ > >> .../wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 34 +++++++++++++++++++ > >> 2 files changed, 42 insertions(+) > >> > >> diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h > >> b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h > >> index 90268479d3ad..c8cee4a24755 100644 > >> --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h > >> +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h > >> @@ -1443,6 +1443,8 @@ struct rtl8xxxu_cfo_tracking { > >> u32 packet_count_pre; > >> }; > >> > >> +#define RTL8XXXU_HW_LED_CONTROL 2 > >> + > >> struct rtl8xxxu_priv { > >> struct ieee80211_hw *hw; > >> struct usb_device *udev; > >> @@ -1564,6 +1566,10 @@ struct rtl8xxxu_priv { > >> struct rtl8xxxu_ra_report ra_report; > >> struct rtl8xxxu_cfo_tracking cfo_tracking; > >> struct rtl8xxxu_ra_info ra_info; > >> + > >> + bool led_registered; > >> + char led_name[32]; > >> + struct led_classdev led_cdev; > >> }; > >> > >> struct rtl8xxxu_rx_urb { > >> @@ -1613,6 +1619,8 @@ struct rtl8xxxu_fileops { > >> u32 rts_rate); > >> void (*set_crystal_cap) (struct rtl8xxxu_priv *priv, u8 crystal_cap); > >> s8 (*cck_rssi) (struct rtl8xxxu_priv *priv, u8 cck_agc_rpt); > >> + int (*led_classdev_brightness_set) (struct led_classdev *led_cdev, > >> + enum led_brightness brightness); > >> int writeN_block_size; > >> int rx_agg_buf_size; > >> char tx_desc_size; > >> diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c > >> b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c > >> index 35dc777c1fba..b27edd503c23 100644 > >> --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c > >> +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c > >> @@ -6955,6 +6955,34 @@ static int rtl8xxxu_parse_usb(struct rtl8xxxu_priv *priv, > >> return ret; > >> } > >> > >> +static void rtl8xxxu_init_led(struct rtl8xxxu_priv *priv) > >> +{ > >> + struct led_classdev *led = &priv->led_cdev; > >> + > >> + led->brightness_set_blocking = priv->fops->led_classdev_brightness_set; > >> + > >> + snprintf(priv->led_name, sizeof(priv->led_name), > >> + "rtl8xxxu-usb%s", dev_name(&priv->udev->dev)); > >> + led->name = priv->led_name; > >> + led->max_brightness = RTL8XXXU_HW_LED_CONTROL; > >> + > >> + if (led_classdev_register(&priv->udev->dev, led)) > >> + return; > >> + > >> + priv->led_registered = true; > >> + > >> + led->brightness = led->max_brightness; > >> + priv->fops->led_classdev_brightness_set(led, led->brightness); > >> +} > >> + > >> +static void rtl8xxxu_deinit_led(struct rtl8xxxu_priv *priv) > >> +{ > >> + struct led_classdev *led = &priv->led_cdev; > >> + > >> + priv->fops->led_classdev_brightness_set(led, LED_OFF); > >> + led_classdev_unregister(led); > >> +} > >> + > >> static int rtl8xxxu_probe(struct usb_interface *interface, > >> const struct usb_device_id *id) > >> { > >> @@ -7135,6 +7163,9 @@ static int rtl8xxxu_probe(struct usb_interface *interface, > >> goto err_set_intfdata; > >> } > >> > >> + if (priv->fops->led_classdev_brightness_set) > > > > I prefer to move this checking statement into rtl8xxxu_init_led(). Then, > > the flow of rtl8xxxu_probe() looks clean. As well as rtl8xxxu_deinit_led(). > > Just soft suggestion. > > > Okay. That works too. > > >> + rtl8xxxu_init_led(priv); > >> + > >> return 0; > >> > >> err_set_intfdata: > >> @@ -7159,6 +7190,9 @@ static void rtl8xxxu_disconnect(struct usb_interface *interface) > >> hw = usb_get_intfdata(interface); > >> priv = hw->priv; > >> > >> + if (priv->led_registered) > >> + rtl8xxxu_deinit_led(priv); > >> + > >> ieee80211_unregister_hw(hw); > >> > >> priv->fops->power_off(priv); > >> -- > >> 2.38.0 > >> > >> ------Please consider the environment before printing this e-mail.
On 19/01/2023 02:25, Ping-Ke Shih wrote: > > >> -----Original Message----- >> From: Bitterblue Smith <rtl8821cerfe2@gmail.com> >> Sent: Wednesday, January 18, 2023 9:53 PM >> To: Ping-Ke Shih <pkshih@realtek.com>; linux-wireless@vger.kernel.org >> Cc: Jes Sorensen <Jes.Sorensen@gmail.com> >> Subject: Re: [PATCH 1/4] wifi: rtl8xxxu: Register the LED and make it blink >> >> On 18/01/2023 02:52, Ping-Ke Shih wrote: >>> >>> >>>> -----Original Message----- >>>> From: Bitterblue Smith <rtl8821cerfe2@gmail.com> >>>> Sent: Wednesday, January 18, 2023 6:03 AM >>>> To: linux-wireless@vger.kernel.org >>>> Cc: Jes Sorensen <Jes.Sorensen@gmail.com>; Ping-Ke Shih <pkshih@realtek.com> >>>> Subject: [PATCH 1/4] wifi: rtl8xxxu: Register the LED and make it blink >>>> >>>> If the chip can have an LED, register a struct led_classdev and enable >>>> hardware-controlled blinking. When the chip is not transmitting or >>>> receiving anything the LED is off. Otherwise the LED will blink >>>> faster or slower according to the throughput. >>>> >>>> The LED can be controlled from userspace by writing 0, 1, or 2 to >>>> /sys/class/leds/rtl8xxxu-usbX-Y/brightness: >>>> 0 - solid off. >>>> 1 - solid on. >>>> 2 - hardware-controlled blinking. >>> >>> So, do you like >>> >>> #define RTL8XXXU_HW_LED_BLINKING 2 >>> >> I'm not sure what you mean. Can you elaborate? > > Originally, I would like to replace RTL8XXXU_HW_LED_CONTROL by > RTL8XXXU_HW_LED_BLINKING, because commit messages say "blinking". > After reviewing 2/4, 3/4 and 4/4, I aware that this blinking is > hardware behavior. Then, it becomes hard to me to decide which > name is clear. Anyway, original is fine to me. > Ah, okay. Now I get it. I will keep the original name.
diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h index 90268479d3ad..c8cee4a24755 100644 --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h @@ -1443,6 +1443,8 @@ struct rtl8xxxu_cfo_tracking { u32 packet_count_pre; }; +#define RTL8XXXU_HW_LED_CONTROL 2 + struct rtl8xxxu_priv { struct ieee80211_hw *hw; struct usb_device *udev; @@ -1564,6 +1566,10 @@ struct rtl8xxxu_priv { struct rtl8xxxu_ra_report ra_report; struct rtl8xxxu_cfo_tracking cfo_tracking; struct rtl8xxxu_ra_info ra_info; + + bool led_registered; + char led_name[32]; + struct led_classdev led_cdev; }; struct rtl8xxxu_rx_urb { @@ -1613,6 +1619,8 @@ struct rtl8xxxu_fileops { u32 rts_rate); void (*set_crystal_cap) (struct rtl8xxxu_priv *priv, u8 crystal_cap); s8 (*cck_rssi) (struct rtl8xxxu_priv *priv, u8 cck_agc_rpt); + int (*led_classdev_brightness_set) (struct led_classdev *led_cdev, + enum led_brightness brightness); int writeN_block_size; int rx_agg_buf_size; char tx_desc_size; diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c index 35dc777c1fba..b27edd503c23 100644 --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c @@ -6955,6 +6955,34 @@ static int rtl8xxxu_parse_usb(struct rtl8xxxu_priv *priv, return ret; } +static void rtl8xxxu_init_led(struct rtl8xxxu_priv *priv) +{ + struct led_classdev *led = &priv->led_cdev; + + led->brightness_set_blocking = priv->fops->led_classdev_brightness_set; + + snprintf(priv->led_name, sizeof(priv->led_name), + "rtl8xxxu-usb%s", dev_name(&priv->udev->dev)); + led->name = priv->led_name; + led->max_brightness = RTL8XXXU_HW_LED_CONTROL; + + if (led_classdev_register(&priv->udev->dev, led)) + return; + + priv->led_registered = true; + + led->brightness = led->max_brightness; + priv->fops->led_classdev_brightness_set(led, led->brightness); +} + +static void rtl8xxxu_deinit_led(struct rtl8xxxu_priv *priv) +{ + struct led_classdev *led = &priv->led_cdev; + + priv->fops->led_classdev_brightness_set(led, LED_OFF); + led_classdev_unregister(led); +} + static int rtl8xxxu_probe(struct usb_interface *interface, const struct usb_device_id *id) { @@ -7135,6 +7163,9 @@ static int rtl8xxxu_probe(struct usb_interface *interface, goto err_set_intfdata; } + if (priv->fops->led_classdev_brightness_set) + rtl8xxxu_init_led(priv); + return 0; err_set_intfdata: @@ -7159,6 +7190,9 @@ static void rtl8xxxu_disconnect(struct usb_interface *interface) hw = usb_get_intfdata(interface); priv = hw->priv; + if (priv->led_registered) + rtl8xxxu_deinit_led(priv); + ieee80211_unregister_hw(hw); priv->fops->power_off(priv);
If the chip can have an LED, register a struct led_classdev and enable hardware-controlled blinking. When the chip is not transmitting or receiving anything the LED is off. Otherwise the LED will blink faster or slower according to the throughput. The LED can be controlled from userspace by writing 0, 1, or 2 to /sys/class/leds/rtl8xxxu-usbX-Y/brightness: 0 - solid off. 1 - solid on. 2 - hardware-controlled blinking. In this patch none of the chips advertise having an LED. That will be added in the next patches. Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com> --- .../net/wireless/realtek/rtl8xxxu/rtl8xxxu.h | 8 +++++ .../wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 34 +++++++++++++++++++ 2 files changed, 42 insertions(+)