[meta-xilinx] SPI spidev hanging in write and ioctl

[Anders Berndtsson]

Dear All

Userspace spidev is hanging in write() and ioctl().  

 

Kernel : XLNX 3.8 and 3.10 (same behavior ).

 

ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits); works OK

ioctl(fd, SPI_IOC_MESSAGE(2), mesg);     hangs

write(fd, :                              hangs 

 

Same code on yocto>raspberry-pi works and also the SPI interface!! 

 

Device tree settings:

 

       model = "Xilinx Zynq";

       aliases {

              ethernet0 = &ps7_ethernet_0;

              serial0 = &ps7_uart_1;

              spi0 = &ps7_qspi_0;

              spi1 = &ps7_spi_1;

              } ;

       chosen {

:::

.

.

.

:::

              ps7_spi_1: ps7-spi at e0007000 {

                     

                     clock-names = "ref_clk", "aper_clk";

                     clocks = <&clkc 26>, <&clkc 35>;

                     compatible = "xlnx,ps7-spi-1.00.a";

                     interrupt-parent = <&ps7_scugic_0>;

                     interrupts = <0 49 4>; 

                     num-chip-select = <3>;

                     reg = <0xe0007000 0x1000>;

                     bus-num = <1>;

                     speed-hz = <1000000>; // 1MHz

                     xlnx,has-ss0=<0x0>; // off

                     xlnx,has-ss1=<0x1>; // on

                     xlnx,has-ss2=<0x0>; // on

                     xlnx,spi-clk-freq-hz=<1000000>; 

                     #address-cells = <1>;

                     #size-cells = <0>;

 

                     spidev at 1{

                           compatible="spidev";

                           reg =<1>; // chipselect 1

                           spi-max-frequency= <1000000>;

                     } ;

                     spidev at 2{

                           compatible="spidev";

                           reg =<2>; // chipselect 2

                           spi-max-frequency= <1000000>;

                     } ;

 

Kernel configuration (both for XLNX 3.8 and 3.10)

----------------------------------------------------------------------------
--------------------------┐ │  

  │ │               --- SPI support
│ │  

  │ │               [ ]   Debug support for SPI drivers
│ │  

  │ │                     *** SPI Master Controller Drivers ***
│ │  

  │ │               < >   Altera SPI Controller
│ │  

  │ │               -*-   Utilities for Bitbanging SPI masters
│ │  

  │ │               < >   GPIO-based bitbanging SPI Master
│ │  

  │ │               [ ]   Freescale SPI controller and Aeroflex Gaisler
GRLIB SPI controller          │ │  

  │ │               < >   OpenCores tiny SPI
│ │  

  │ │               < >   ARM AMBA PL022 SSP controller
│ │  

  │ │               < >   PXA2xx SSP SPI master
│ │  

  │ │               < >   NXP SC18IS602/602B/603 I2C to SPI bridge
│ │  

  │ │               < >   Intel EG20T PCH/LAPIS Semicon
IOH(ML7213/ML7223/ML7831) SPI                 │ │  

  │ │               < >   Analog Devices AD-FMCOMMS1-EBZ SPI-I2C-bridge
driver                        │ │  

  │ │               <*>   Xilinx SPI controller common module
│ │  

  │ │               <*>   Xilinx PS QSPI controller
│ │  

  │ │               [ ]     Xilinx PS QSPI Dual stacked configuration
│ │  

  │ │               <*>   Xilinx PS SPI controller
│ │  

  │ │               < >   DesignWare SPI controller core support
│ │  

  │ │                     *** SPI Protocol Masters ***
│ │  

  │ │               <*>   User mode SPI device driver support
│ │  

  │ │               < >   Infineon TLE62X0 (for power switching)
│ │  

  │ │
│ │  

  

 

Both /dev/spidev1.1 and /dev/spidev1.2 appears 

Under cat /proc/devices I get  > 153 spi

 

All MIO configured to 

MIO 10 > SPI1,MOSI

MIO 11 > SPI1,MISO

MIO 12 > SPI1,CLK 

MIO 13 > SPI1,SS0

MOI 14 > SPI1,SS1

MIO 15 > SPI1,SS2

 

Do I miss something?

 

Do I configure the SPI controller separately?

 

Can someone advise how to make the correct settings / how to debug.

 

Best Regards

Anders Berndtsson

                                                                          

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