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imx6 add spi slave mode cause other problems

Question asked by xuhui li on Jun 4, 2019
Latest reply on Sep 18, 2019 by jimmychan


I use imx6ul  ,linux kenerl version branch imx_4.1.15_1.0.0_ga, I refrence branch imx_4.14.98_2.0.0_ga add spi slave mode to imx_4.1.15_1.0.0_ga, and spi slave mode is proper functioning, but it affects ecspi flash and other pad ,such as PAD_GPIO1_IO00,details are as follows:


1 . ecspi flash problem:

my ecspi flash config

   &ecspi1 {
    fsl,spi-num-chipselects = <1>;
    cs-gpios = <&gpio4 26 0>;
    pinctrl-names = "default";
    pinctrl-0 = <&pinctrl_ecspi1 &pinctrl_ecspi1_cs>;
    status = "okay"; /* pin conflict with WEIM NOR */


    flash: m25p80@0 {
        #address-cells = <1>;
        #size-cells = <1>;
        compatible = "micron,n25q128a13";
        spi-max-frequency = <40000000>;
        reg = <0>;


        pinctrl_ecspi1: ecspi1grp {
            fsl,pins = <
                MX6UL_PAD_CSI_DATA04__ECSPI1_SCLK     0x1b0b0
                MX6UL_PAD_CSI_DATA06__ECSPI1_MOSI     0x1b0b0
                MX6UL_PAD_CSI_DATA07__ECSPI1_MISO    0x1b0b0


        pinctrl_ecspi1_cs: ecspi1cs {
            fsl,pins = <
                MX6UL_PAD_CSI_DATA05__GPIO4_IO26     0x1b0b0

and ecspi3 slave config



&ecspi3 {
    #address-cells = <1>;
    #size-cells = <0>;
    pinctrl-names = "default";
    pinctrl-0 = <&pinctrl_ecspi3>;
    status = "okay";


    spidev0: spi@0 {
        reg = <0>;
        compatible = "rohm,dh2228fv";
        spi-max-frequency = <20000000>;


        pinctrl_ecspi3: ecspi3grp {
            fsl,pins = <
                MX6UL_PAD_NAND_CE0_B__ECSPI3_SCLK    0x5011    //0x70a1
                MX6UL_PAD_NAND_CE1_B__ECSPI3_MOSI    0x5011    //0x70a1
                MX6UL_PAD_NAND_CLE__ECSPI3_MISO     0x5011    //0x70a1
                MX6UL_PAD_NAND_RE_B__ECSPI3_SS2        0x5011    //0x70a1


Starting kernel ...
Booting Linux on physical CPU 0x0
Linux version 4.1.15+ (lxh@lxh) (gcc version 5.2.0 (GCC) ) #12 SMP PREEMPT Wed Jun 5 09:29:05 CST 2019
CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c53c7d
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine model: Freescale i.MX6 UltraLite 14x14 EVK Board
Reserved memory: created CMA memory pool at 0x8c000000, size 320 MiB
Reserved memory: initialized node linux,cma, compatible id shared-dma-pool
Memory policy: Data cache writealloc
PERCPU: Embedded 12 pages/cpu @8bb2f000 s16704 r8192 d24256 u49152
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 130048
Kernel command line: console=ttymxc1,115200 mtdparts=spi0.0:512k(uboot),256k(env),256k(script),4m(kernel),256k(dtb),3840k(rootfs),2m(config),2m(statistics),-(user)
PID hash table entries: 2048 (order: 1, 8192 bytes)
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 181204K/524288K available (4672K kernel code, 228K rwdata, 1660K rodata, 320K init, 400K bss, 15404K reserved, 327680K cma-reserved, 0K highmem)
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
    vmalloc : 0xa0800000 - 0xff000000   (1512 MB)
    lowmem  : 0x80000000 - 0xa0000000   ( 512 MB)
    pkmap   : 0x7fe00000 - 0x80000000   (   2 MB)
    modules : 0x7f000000 - 0x7fe00000   (  14 MB)
      .text : 0x80008000 - 0x80637594   (6334 kB)
      .init : 0x80638000 - 0x80688000   ( 320 kB)
      .data : 0x80688000 - 0x806c1360   ( 229 kB)
       .bss : 0x806c4000 - 0x807281e8   ( 401 kB)
SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
Preemptible hierarchical RCU implementation.
        Additional per-CPU info printed with stalls.
        RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=1.
RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1
NR_IRQS:16 nr_irqs:16 16
mxc_clocksource_init 24000000
Switching to timer-based delay loop, resolution 41ns
sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 89478484971ns
clocksource mxc_timer1: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 79635851949 ns
Console: colour dummy device 80x30
Calibrating delay loop (skipped), value calculated using timer frequency.. 48.00 BogoMIPS (lpj=240000)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
CPU: Testing write buffer coherency: ok
/cpus/cpu@0 missing clock-frequency property
CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
Setting up static identity map for 0x80008280 - 0x800082d8
Brought up 1 CPUs
SMP: Total of 1 processors activated (48.00 BogoMIPS).
CPU: All CPU(s) started in SVC mode.
devtmpfs: initialized
VFP support v0.3: implementor 41 architecture 2 part 30 variant 7 rev 5
clocksource jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
pinctrl core: initialized pinctrl subsystem
NET: Registered protocol family 16
DMA: preallocated 256 KiB pool for atomic coherent allocations
cpuidle: using governor ladder
cpuidle: using governor menu
hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.
hw-breakpoint: maximum watchpoint size is 8 bytes.
imx6ul-pinctrl 20e0000.iomuxc: initialized IMX pinctrl driver
mxs-dma 1804000.dma-apbh: initialized
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
pps_core: LinuxPPS API ver. 1 registered
pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <>
PTP clock support registered
Switched to clocksource mxc_timer1
NET: Registered protocol family 2
TCP established hash table entries: 4096 (order: 2, 16384 bytes)
TCP bind hash table entries: 4096 (order: 3, 32768 bytes)
TCP: Hash tables configured (established 4096 bind 4096)
UDP hash table entries: 256 (order: 1, 8192 bytes)
UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
NET: Registered protocol family 1
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
Trying to unpack rootfs image as initramfs...
Freeing initrd memory: 2724K (83800000 - 83aa9000)
imx rpmsg driver is registered.
Bus freq driver module loaded
futex hash table entries: 256 (order: 2, 16384 bytes)
VFS: Disk quotas dquot_6.6.0
VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
NFS: Registering the id_resolver key type
Key type id_resolver registered
Key type id_legacy registered
ntfs: driver 2.1.32 [Flags: R/O].
jffs2: version 2.2. (NAND) ? 2001-2006 Red Hat, Inc.
fuse init (API version 7.23)
io scheduler noop registered (default)
imx-weim 21b8000.weim: Driver registered.
imx-sdma 20ec000.sdma: no event needs to be remapped
imx-sdma 20ec000.sdma: loaded firmware 3.3
imx-sdma 20ec000.sdma: initialized
2020000.serial: ttymxc0 at MMIO 0x2020000 (irq = 22, base_baud = 5000000) is a IMX
21e8000.serial: ttymxc1 at MMIO 0x21e8000 (irq = 224, base_baud = 5000000) is a IMX
console [ttymxc1] enabled
imx sema4 driver is registered.
brd: module loaded
loop: module loaded
m25p80 spi0.0: n25q128a13 (16384 Kbytes)
9 cmdlinepart partitions found on MTD device spi0.0
Creating 9 MTD partitions on "spi0.0":
0x000000000000-0x000000080000 : "uboot"
0x000000080000-0x0000000c0000 : "env"
0x0000000c0000-0x000000100000 : "script"
0x000000100000-0x000000500000 : "kernel"
0x000000500000-0x000000540000 : "dtb"
0x000000540000-0x000000900000 : "rootfs"
0x000000900000-0x000000b00000 : "config"
0x000000b00000-0x000000d00000 : "statistics"
0x000000d00000-0x000001000000 : "user"
spi_imx 2008000.ecspi: probed
spi_slave spi2: /soc/aips-bus@02000000/spba-bus@02000000/ecspi@02010000/spi@0 is not called 'slave'
spi_slave spi2: Failed to create SPI device for /soc/aips-bus@02000000/spba-bus@02000000/ecspi@02010000/spi@0
spi_imx 2010000.ecspi: probed
spi_imx 2014000.ecspi: probed
20b4000.ethernet supply phy not found, using dummy regulator
pps pps0: new PPS source ptp0
fec 20b4000.ethernet (unnamed net_device) (uninitialized): Invalid MAC address: 00:00:00:00:00:00
fec 20b4000.ethernet (unnamed net_device) (uninitialized): Using random MAC address: e6:83:65:7b:d8:9a
libphy: fec_enet_mii_bus: probed
fec 20b4000.ethernet eth0: registered PHC device 0
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ehci-mxc: Freescale On-Chip EHCI Host driver
usbcore: registered new interface driver cdc_acm
cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
usbcore: registered new interface driver usblp
usbcore: registered new interface driver usb-storage
usbcore: registered new interface driver usbserial
usbcore: registered new interface driver usbserial_generic
usbserial: USB Serial support registered for generic
usbcore: registered new interface driver ftdi_sio
usbserial: USB Serial support registered for FTDI USB Serial Device
usbcore: registered new interface driver pl2303
usbserial: USB Serial support registered for pl2303
usbcore: registered new interface driver usb_ehset_test
2184800.usbmisc supply vbus-wakeup not found, using dummy regulator
2184000.usb supply vbus not found, using dummy regulator
2184200.usb supply vbus not found, using dummy regulator
ci_hdrc ci_hdrc.1: EHCI Host Controller
ci_hdrc ci_hdrc.1: new USB bus registered, assigned bus number 1
ci_hdrc ci_hdrc.1: USB 2.0 started, EHCI 1.00
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
input: 20cc000.snvs:snvs-powerkey as /devices/platform/soc/2000000.aips-bus/20cc000.snvs/20cc000.snvs:snvs-powerkey/input/input0
snvs_rtc 20cc000.snvs:snvs-rtc-lp: rtc core: registered 20cc000.snvs:snvs-r as rtc0
i2c /dev entries driver
imx2-wdt 20bc000.wdog: use WDOG_B to reboot.
imx2-wdt 20bc000.wdog: timeout 60 sec (nowayout=0)
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
sdhci-pltfm: SDHCI platform and OF driver helper
NET: Registered protocol family 17
Key type dns_resolver registered
input: gpio_keys as /devices/platform/gpio_keys/input/input1
snvs_rtc 20cc000.snvs:snvs-rtc-lp: setting system clock to 1970-01-01 00:00:00 UTC (0)
gpio_dvfs: disabling
usb_otg2_vbus: disabling
Freeing unused kernel memory: 320K (80638000 - 80688000)
fec 20b4000.ethernet eth0: Freescale FEC PHY driver [Micrel KSZ8081 or KSZ8091] (mii_bus:phy_addr=20b4000.ethernet:01, irq=-1)
spi_master spi0: I/O Error in DMA RX
spi_master spi0: failed to transfer one message from queue
mount: mounting /dev/mtdblock6 on /home/config/ failed: Input/output error
Please press Enter to activate this console. random: nonblocking pool is initialized



2.then I use spi_slave

root@root:/# echo spidev > /sys/class/spi_slave/spi2/slave

i use  MX6UL_PAD_GPIO1_IO00 as GPIO input, is pulled to high level.


                        MX6UL_PAD_GPIO1_IO00__GPIO1_IO00       0x17059 //0xb0 //0x000010B0