diff options
Diffstat (limited to 'target/linux/realtek/patches-5.10/311-add-i2c-mux-rtl9300-support.patch')
| -rw-r--r-- | target/linux/realtek/patches-5.10/311-add-i2c-mux-rtl9300-support.patch | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/target/linux/realtek/patches-5.10/311-add-i2c-mux-rtl9300-support.patch b/target/linux/realtek/patches-5.10/311-add-i2c-mux-rtl9300-support.patch index 0204643d02..d0bfba4538 100644 --- a/target/linux/realtek/patches-5.10/311-add-i2c-mux-rtl9300-support.patch +++ b/target/linux/realtek/patches-5.10/311-add-i2c-mux-rtl9300-support.patch @@ -1,3 +1,22 @@ +From f4bdb7fdccdfe3fa382abe77f72a16c2f2e6add0 Mon Sep 17 00:00:00 2001 +From: Birger Koblitz <git@birger-koblitz.de> +Date: Sat, 11 Dec 2021 20:25:37 +0100 +Subject: [PATCH] realtek: Add support for RTL9300/RTL9310 I2C multiplexing + +The RTL9300/RTL9310 I2C controllers have support for 2 independent I2C +masters, each with a fixed SCL pin, that cannot be changed. Each of these +masters can use 8 (RTL9300) or 16 (RTL9310) different pins for SDA. +This multiplexer directly controls the two masters and their shared +IO configuration registers to allow multiplexing between any of these +busses. The two masters cannot be used in parallel as the multiplex +is protected by a standard multiplex lock. + +Submitted-by: Birger Koblitz <git@birger-koblitz.de> +--- + drivers/i2c/muxes/Kconfig | 9 +++++++ + drivers/i2c/muxes/Makefile | 1 + + 2 files changed, 10 insertions(+) + --- a/drivers/i2c/muxes/Kconfig +++ b/drivers/i2c/muxes/Kconfig @@ -99,6 +99,15 @@ config I2C_MUX_REG |