Hi Bin,
Sorry for the top-posting.
After check the datasheet, I think my SPI address was wrong due to null ops->read_config in pci_bus_read_config(). My dts file: spi: spi { #address-cells = <1>; #size-cells = <0>; compatible = "intel,ich9-spi"; spi-flash@0 { #address-cells = <1>; #size-cells = <1>; reg = <0>; compatible = "winbond,w25q128bv", "spi-flash"; memory-map = <0xff000000 0x01000000>; rw-mrc-cache { label = "rw-mrc-cache"; reg = <0xffe10000 0x00010000>; }; }; };
And also bind the node as following:
bind node spi ##device_bind: driver id:50, driver name:ich_spi Looking for 'spi' at 1140, name spi Looking for 'spi' at 1140, name spi - spi0, /pci/pch@1f,0/spi - spi0, /pci/pch@1f,0/spi Found seq 0 Found seq 0 bind node spi-flash@0 ##device_bind: driver id:52, driver name:spi_flash_std fdtdec_get_bool: spi-cpol fdtdec_get_bool: spi-cpha fdtdec_get_bool: spi-cs-high fdtdec_get_bool: spi-3wire fdtdec_get_bool: spi-half-duplex
The "dm tree" is as following: Class Probed Name ---------------------------------------- root [ + ] root_driver serial [ + ] |-- serial keyboard [ + ] |-- keyboard rtc [ ] |-- rtc timer [ + ] |-- tsc-timer pci [ + ] `-- pci pch [ + ] |-- pch@1f,0 irq [ + ] | |-- irq-router spi [ + ] | `-- spi spi_flash [ ] | `-- spi-flash@0 pci_generic [ ] |-- pci_0:0.0 pci [ + ] |-- pci_0:1.0 pci_generic [ ] | `-- pci_1:0.0 pci [ + ] |-- pci_0:3.0 pci_generic [ ] |-- pci_0:e.0 pci_generic [ ] |-- pci_0:f.0 pci_generic [ ] |-- pci_0:13.0 usb [ ] |-- ehci_pci pci_generic [ ] |-- pci_0:17.0 pci_generic [ ] |-- pci_0:18.0 pci_generic [ ] `-- pci_0:1f.3
So I think the initialization is ok. But when I execute "sf probe", I got following wrong result:
##uclass_find_device_by_seq: find_req_seq=0 seq_or_req_seq=0 ##uclass_find_device_by_seq: id=50, ret=0 ##uclass_find_device_by_seq: dev req bus=0 dev bus=-1 device not found ##spi_flash_probe_bus_cs: bus=0, num=0 ##uclass_find_device_by_seq: find_req_seq=0 seq_or_req_seq=0 ##uclass_find_device_by_seq: id=50, ret=0 ##uclass_find_device_by_seq: dev req bus=0 dev bus=-1 device not found ##uclass_get_device_by_seq: id=50, bus=0, ret=-19 ##uclass_find_device_by_seq: find_req_seq=1 seq_or_req_seq=0 ##uclass_find_device_by_seq: id=50, ret=0 ##uclass_find_device_by_seq: dev req bus=0 dev bus=-1 device found ##uclass_find_device_by_seq: find_req_seq=0 seq_or_req_seq=0 ##uclass_find_device_by_seq: id=50, ret=0 ##uclass_find_device_by_seq: dev req bus=0 dev bus=-1 device not found ##uclass_resolve_seq: Device 'spi': seq 0 dup name:'<NULL>', ret=-19 ###ops->read_config is null ##ich_init_controller: sbasep:2143514112, sbase_addr:7fc36ed2 ich_init_controller: sbase=7fc36e00
The node "spi" does not have correct operations to read config. Is it due to wrong device model or wrong dts file?
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