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Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0251-overlays-Update-README-with-removal-of-lirc-rpi.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0251-overlays-Update-README-with-removal-of-lirc-rpi.patch | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0251-overlays-Update-README-with-removal-of-lirc-rpi.patch b/target/linux/brcm2708/patches-4.19/950-0251-overlays-Update-README-with-removal-of-lirc-rpi.patch new file mode 100644 index 0000000000..02162129b4 --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0251-overlays-Update-README-with-removal-of-lirc-rpi.patch @@ -0,0 +1,91 @@ +From f2c24ce7e03d059fa9f674d8ebf6286e8f0c38b6 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Wed, 5 Dec 2018 11:56:40 +0000 +Subject: [PATCH] overlays: Update README with removal of lirc-rpi + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> +--- + arch/arm/boot/dts/overlays/README | 57 ++++++++++++------------------- + 1 file changed, 21 insertions(+), 36 deletions(-) + +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -56,23 +56,29 @@ have its contents deleted (or commented + Using Overlays + ============== + +-Overlays are loaded using the "dtoverlay" directive. As an example, consider +-the popular lirc-rpi module, the Linux Infrared Remote Control driver. In the +-pre-DT world this would be loaded from /etc/modules, with an explicit +-"modprobe lirc-rpi" command, or programmatically by lircd. With DT enabled, +-this becomes a line in config.txt: +- +- dtoverlay=lirc-rpi +- +-This causes the file /boot/overlays/lirc-rpi.dtbo to be loaded. By +-default it will use GPIOs 17 (out) and 18 (in), but this can be modified using +-DT parameters: +- +- dtoverlay=lirc-rpi,gpio_out_pin=17,gpio_in_pin=13 +- +-Parameters always have default values, although in some cases (e.g. "w1-gpio") +-it is necessary to provided multiple overlays in order to get the desired +-behaviour. See the list of overlays below for a description of the parameters ++Overlays are loaded using the "dtoverlay" config.txt setting. As an example, ++consider I2C Real Time Clock drivers. In the pre-DT world these would be loaded ++by writing a magic string comprising a device identifier and an I2C address to ++a special file in /sys/class/i2c-adapter, having first loaded the driver for ++the I2C interface and the RTC device - something like this: ++ ++ modprobe i2c-bcm2835 ++ modprobe rtc-ds1307 ++ echo ds1307 0x68 > /sys/class/i2c-adapter/i2c-1/new_device ++ ++With DT enabled, this becomes a line in config.txt: ++ ++ dtoverlay=i2c-rtc,ds1307 ++ ++This causes the file /boot/overlays/i2c-rtc.dtbo to be loaded and a "node" ++describing the DS1307 I2C device to be added to the Device Tree for the Pi. By ++default it usees address 0x68, but this can be modified with an additional DT ++parameter: ++ ++ dtoverlay=i2c-rtc,ds1307,addr=0x68 ++ ++Parameters usually have default values, although certain parameters are ++mandatory. See the list of overlays below for a description of the parameters + and their defaults. + + The Overlay and Parameter Reference +@@ -1135,29 +1141,8 @@ Params: <None> + + + Name: lirc-rpi +-Info: Configures lirc-rpi (Linux Infrared Remote Control for Raspberry Pi) +- Consult the module documentation for more details. +-Load: dtoverlay=lirc-rpi,<param>=<val> +-Params: gpio_out_pin GPIO for output (default "17") +- +- gpio_in_pin GPIO for input (default "18") +- +- gpio_in_pull Pull up/down/off on the input pin +- (default "down") +- +- sense Override the IR receive auto-detection logic: +- "0" = force active-high +- "1" = force active-low +- "-1" = use auto-detection +- (default "-1") +- +- softcarrier Turn the software carrier "on" or "off" +- (default "on") +- +- invert "on" = invert the output pin (default "off") +- +- debug "on" = enable additional debug messages +- (default "off") ++Info: This overlay has been deprecated and removed - see gpio-ir ++Load: <Deprecated> + + + Name: ltc294x |