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| author | Birger Koblitz <git@birger-koblitz.de> | 2021-12-11 20:25:37 +0100 |
|---|---|---|
| committer | Daniel Golle <daniel@makrotopia.org> | 2022-02-17 15:21:46 +0000 |
| commit | f4bdb7fdccdfe3fa382abe77f72a16c2f2e6add0 (patch) | |
| tree | b692a21fde7e19338a667bec8ad5a713907fdaed /target/linux/realtek/patches-5.10 | |
| parent | 63a0a4d85bc900464c5b046b13808a582345f8c8 (diff) | |
| download | upstream-f4bdb7fdccdfe3fa382abe77f72a16c2f2e6add0.tar.gz upstream-f4bdb7fdccdfe3fa382abe77f72a16c2f2e6add0.tar.bz2 upstream-f4bdb7fdccdfe3fa382abe77f72a16c2f2e6add0.zip | |
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.
Signed-off-by: Birger Koblitz <git@birger-koblitz.de>
Diffstat (limited to 'target/linux/realtek/patches-5.10')
| -rw-r--r-- | target/linux/realtek/patches-5.10/311-add-i2c-mux-rtl9300-support.patch | 27 |
1 files changed, 27 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 new file mode 100644 index 0000000000..0204643d02 --- /dev/null +++ b/target/linux/realtek/patches-5.10/311-add-i2c-mux-rtl9300-support.patch @@ -0,0 +1,27 @@ +--- a/drivers/i2c/muxes/Kconfig ++++ b/drivers/i2c/muxes/Kconfig +@@ -99,6 +99,15 @@ config I2C_MUX_REG + This driver can also be built as a module. If so, the module + will be called i2c-mux-reg. + ++config I2C_MUX_RTL9300 ++ tristate "RTL9300 based I2C multiplexer" ++ help ++ If you say yes to this option, support will be included for a ++ RTL9300 based I2C multiplexer. ++ ++ This driver can also be built as a module. If so, the module ++ will be called i2c-mux-reg. ++ + config I2C_DEMUX_PINCTRL + tristate "pinctrl-based I2C demultiplexer" + depends on PINCTRL && OF +--- a/drivers/i2c/muxes/Makefile ++++ b/drivers/i2c/muxes/Makefile +@@ -14,5 +14,6 @@ obj-$(CONFIG_I2C_MUX_PCA9541) += i2c-mux + obj-$(CONFIG_I2C_MUX_PCA954x) += i2c-mux-pca954x.o + obj-$(CONFIG_I2C_MUX_PINCTRL) += i2c-mux-pinctrl.o + obj-$(CONFIG_I2C_MUX_REG) += i2c-mux-reg.o ++obj-$(CONFIG_I2C_MUX_RTL9300) += i2c-mux-rtl9300.o + + ccflags-$(CONFIG_I2C_DEBUG_BUS) := -DDEBUG |