@@ -29,6 +29,18 @@ aliases {
i2c30 = &ocpslot_0;
i2c31 = &ocpslot_1;
+ /*
+ * i2c bus 32-33 assigned to Riser slot 0-1
+ */
+ i2c32 = &i2c_riser0;
+ i2c33 = &i2c_riser1;
+
+ /*
+ * i2c bus 38-39 assigned to FRU on Riser slot 0-1
+ */
+ i2c38 = &i2c_riser0_chn_0;
+ i2c39 = &i2c_riser1_chn_0;
+
/*
* I2C NVMe alias port
*/
@@ -551,6 +563,58 @@ ocpslot_1_temp: temperature-sensor@1f {
reg = <0x1f>;
};
};
+
+ i2c_riser0: i2c@2 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x2>;
+
+ i2c-mux@72 {
+ compatible = "nxp,pca9546";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x72>;
+ i2c-mux-idle-disconnect;
+
+ i2c_riser0_chn_0: i2c@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x0>;
+
+ eeprom@50 {
+ compatible = "atmel,24c02";
+ reg = <0x50>;
+ pagesize = <16>;
+ };
+ };
+ };
+ };
+
+ i2c_riser1: i2c@3 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x3>;
+
+ i2c-mux@72 {
+ compatible = "nxp,pca9546";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x72>;
+ i2c-mux-idle-disconnect;
+
+ i2c_riser1_chn_0: i2c@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x0>;
+
+ eeprom@50 {
+ compatible = "atmel,24c02";
+ reg = <0x50>;
+ pagesize = <16>;
+ };
+ };
+ };
+ };
};
};
Define the I2C alias ports for the riser cards. Add the i2c muxes to switch to the i2c alias ports and the eeprom nodes to read the FRU contents on riser cards. Signed-off-by: Chanh Nguyen <chanh@os.amperecomputing.com> --- Changes in v2: - Add eeprom nodes to the riser cards and update commit message [Chanh] --- .../aspeed/aspeed-bmc-ampere-mtmitchell.dts | 64 +++++++++++++++++++ 1 file changed, 64 insertions(+)