diff options
| author | Andrew Jeffery <andrew@aj.id.au> | 2020-07-24 16:22:27 +0930 |
|---|---|---|
| committer | Joel Stanley <joel@jms.id.au> | 2020-07-28 09:02:07 +0930 |
| commit | c5b6bdabceffcdc5058fb0048592e5a68bb814d9 (patch) | |
| tree | c5d60cf2310713b12b71cfbd1793b1749c7a70b0 /arch/arm/boot/dts/aspeed-bmc-ibm-rainier.dts | |
| parent | e6873087cce622bf5af5b519bdf781d086f6b2f4 (diff) | |
ARM: dts: rainier: Describe GPIO mux on I2C3
We have a 4-bus mux whose output is selected by two GPIO inputs. Wire it
up in the devicetree and ensure the output is enabled by hogging the
appropriate line.
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Diffstat (limited to 'arch/arm/boot/dts/aspeed-bmc-ibm-rainier.dts')
| -rw-r--r-- | arch/arm/boot/dts/aspeed-bmc-ibm-rainier.dts | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/aspeed-bmc-ibm-rainier.dts b/arch/arm/boot/dts/aspeed-bmc-ibm-rainier.dts index e91f3bc7a0c2..d20cdf3cd55c 100644 --- a/arch/arm/boot/dts/aspeed-bmc-ibm-rainier.dts +++ b/arch/arm/boot/dts/aspeed-bmc-ibm-rainier.dts @@ -12,6 +12,10 @@ aliases { serial4 = &uart5; + i2c16 = &i2c2mux0; + i2c17 = &i2c2mux1; + i2c18 = &i2c2mux2; + i2c19 = &i2c2mux3; }; chosen { @@ -68,6 +72,41 @@ }; }; + i2c2mux: i2cmux { + compatible = "i2c-mux-gpio"; + #address-cells = <1>; + #size-cells = <0>; + status = "okay"; + + i2c-parent = <&i2c2>; + mux-gpios = <&gpio0 ASPEED_GPIO(G, 4) GPIO_ACTIVE_HIGH>, + <&gpio0 ASPEED_GPIO(G, 5) GPIO_ACTIVE_HIGH>; + idle-state = <0>; + + i2c2mux0: i2c@0 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0>; + }; + + i2c2mux1: i2c@1 { + #address-cells = <1>; + #size-cells = <0>; + reg = <1>; + }; + + i2c2mux2: i2c@2 { + #address-cells = <1>; + #size-cells = <0>; + reg = <2>; + }; + + i2c2mux3: i2c@3 { + #address-cells = <1>; + #size-cells = <0>; + reg = <3>; + }; + }; }; &gpio0 { @@ -109,6 +148,13 @@ output-high; line-name = "mclr_vpp"; }; + + i2c3_mux_oe_n { + gpio-hog; + gpios = <ASPEED_GPIO(G, 6) GPIO_ACTIVE_LOW>; + output-high; + line-name = "I2C3_MUX_OE_N"; + }; }; &emmc_controller { |