Hello,
I've got a problem with SPI bus and MPC885. I'm stuck in driver (mpc8xxx.c) when i send data over the bus with spidev.
In first i configure th SPI in the DTS and the spi_mpc_8xxx fails due to cpm_muram_alloc_fixed function.
- cpm_muram_alloc_fixed ko due to rh_alloc_fixed =>no empty block (blk == null return line 563 rheap.c)
So i try to path the driver and replace spi_base_ofs = cpm_muram_alloc_fixed(iprop[2], 2); by spi_base_ofs = iprop[2]; in the function mpc8xxx_spi_cpm_get_pram
Now the driver is launched :
alloc irq_desc for 24 on node 0
alloc kstat_irqs on node 0
irq: irq 5 on host /soc@fa200000/cpm@9c0/interrupt-controller@930 mapped to virtual irq 24
mpc8xxx_spi fa200aa0.spi: Error fixed 1ssss: 6 4
mpc8xxx_spi fa200aa0.spi: at 0xc52a6aa0 (irq = 24), CPM1 mode
and i can see my spi device :
[/]# ls /dev/s*
/dev/spidev32766.0
But when i try to send data with spidev my driver is sutck. no clock and data on ctrl pins no irq.
The driver wait on wait_for_completion(&mpc8xxx_spi->done);
{CPM_PORTB, 28, CPM_PIN_OUTPUT}, /* SPI MI */
{CPM_PORTB, 29, CPM_PIN_OUTPUT}, /* SPI MO */
{CPM_PORTB, 30, CPM_PIN_OUTPUT}, /* SPI CLK */
{CPM_PORTB, 31, CPM_PIN_OUTPUT | CPM_PIN_GPIO}, /* SPISEL : PBPAR == 0 */
spi@aa0 {
#address-cells = <1>;
#size-cells = <0>;
device_type = "spi";
compatible = "fsl,spi","fsl,cpm1-spi";
reg = <0xaa0 0x12 0x3d80 0x30>;
gpios = <&CPM1_PIO_B 18 0>;
interrupts = <5>;
interrupt-parent = <&CPM_PIC>;
max3421@0 {
compatible = "spi,spidev";
reg = <0>;
spi-max-frequency = <3000000>; /* 3 MHz */
}
