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?
Regards,
Hilbert
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