diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.14/950-0222-overlays-i2c-gpio-Support-for-multiple-instances.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.14/950-0222-overlays-i2c-gpio-Support-for-multiple-instances.patch | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.14/950-0222-overlays-i2c-gpio-Support-for-multiple-instances.patch b/target/linux/brcm2708/patches-4.14/950-0222-overlays-i2c-gpio-Support-for-multiple-instances.patch new file mode 100644 index 0000000000..6e0ca91393 --- /dev/null +++ b/target/linux/brcm2708/patches-4.14/950-0222-overlays-i2c-gpio-Support-for-multiple-instances.patch @@ -0,0 +1,40 @@ +From 3826d26d2a41f03c82c45465ff4759891c1688c6 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Mon, 19 Feb 2018 17:29:15 +0000 +Subject: [PATCH 222/454] overlays: i2c-gpio: Support for multiple instances + +Add a 'bus' parameter that, if set to a unique, non-zero +value, allows multiple i2c-gpio instances to coexist. The chosen +value doesn't determine the /dev/i2c-* value, but starting with +1 or 2 and counting upwards seems sensible. N.B. The bus parameter +has a default value of zero, so one instance doesn't need to specify +a value. + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> +--- + arch/arm/boot/dts/overlays/README | 3 +++ + arch/arm/boot/dts/overlays/i2c-gpio-overlay.dts | 2 +- + 2 files changed, 4 insertions(+), 1 deletion(-) + +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -693,6 +693,9 @@ Params: i2c_gpio_sda GPIO use + i2c_gpio_delay_us Clock delay in microseconds + (default "2" = ~100kHz) + ++ bus Set to a unique, non-zero value if wanting ++ multiple i2c-gpio busses (default "0") ++ + + Name: i2c-mux + Info: Adds support for a number of I2C bus multiplexers on i2c_arm +--- a/arch/arm/boot/dts/overlays/i2c-gpio-overlay.dts ++++ b/arch/arm/boot/dts/overlays/i2c-gpio-overlay.dts +@@ -38,6 +38,6 @@ + i2c_gpio_sda = <&i2c_gpio>,"gpios:4"; + i2c_gpio_scl = <&i2c_gpio>,"gpios:16"; + i2c_gpio_delay_us = <&i2c_gpio>,"i2c-gpio,delay-us:0"; ++ bus = <&i2c_gpio>, "reg:0"; + }; + }; +- |