I want to use spi to read some device, so I enable spidev0.0, spidev1.0, spidev2.0. But there is no any signal on spi port when I test these port.
my device tree:
spi@3210000 {
compatible = "nvidia,tegra186-spi";
reg = <0x0 0x3210000 0x0 0x10000>;
interrupts = <0x0 0x24 0x4>;
#address-cells = <0x1>;
#size-cells = <0x0>;
iommus = <0x2 0x20>;
dma-coherent;
dmas = <0x1e 0xf 0x1e 0xf>;
dma-names = "rx", "tx";
spi-max-frequency = <0x3dfd240>;
nvidia,clk-parents = "pll_p", "clk_m";
clocks = <0x4 0x87 0x4 0x66 0x4 0xe>;
clock-names = "spi", "pll_p", "clk_m";
resets = <0x5 0x5b>;
reset-names = "spi";
status = "okay";
linux,phandle = <0x172>;
phandle = <0x172>;
spidev@0 {
compatible = "spidev";
reg = <0x0>;
spi-max-frequency = <0x1312d00>;
};
};
spi@c260000 {
compatible = "nvidia,tegra186-spi";
reg = <0x0 0xc260000 0x0 0x10000>;
interrupts = <0x0 0x25 0x4>;
#address-cells = <0x1>;
#size-cells = <0x0>;
iommus = <0x2 0x20>;
dma-coherent;
dmas = <0x1e 0x10 0x1e 0x10>;
dma-names = "rx", "tx";
spi-max-frequency = <0xb71b00>;
nvidia,clk-parents = "pll_p", "osc";
clocks = <0x4 0x88 0x4 0x5e 0x4 0x5b>;
clock-names = "spi", "pll_p", "osc";
resets = <0x5 0x5c>;
reset-names = "spi";
status = "okay";
linux,phandle = <0x14b>;
phandle = <0x14b>;
spidev@0 {
compatible = "spidev";
reg = <0x0>;
spi-max-frequency = <0x1312d00>;
};
imx204@0 {
compatible = "nvidia,imx204-spi";
reg = <0x0>;
status = "disabled";
spi-max-frequency = <0xb71b00>;
physical_w = "4.713";
physical_h = "3.494";
delayed_gain = "true";
devname = "imx204-spi";
sensor_model = "imx204";
focus_macro = "100";
focus_infinity = "208";
focus_max_slew_rate = "180";
min_aperture = [32 00];
max_aperture = "90";
min_aperture_fnumber = "2000";
max_aperture_fnumber = "22000";
aperture_max_slew_rate = "180";
fnumber_map = <0x7d0 0x2 0xaf0 0x22 0xfa0 0x31 0x15e0 0x3b 0x1f40 0x43 0x2af8 0x47 0x3e80 0x4b 0x55f0 0x4e>;
reset-gpios = <0x13 0xc1 0x0>;
linux,phandle = <0x146>;
phandle = <0x146>;
mode0 {
mclk_khz = "72000";
num_lanes = [38 00];
tegra_sinterface = "serial_a";
phy_mode = "SLVS";
discontinuous_clk = "no";
dpcm_enable = "false";
cil_settletime = [30 00];
active_w = "5352";
active_h = "3950";
pixel_t = "bayer_rggb";
readout_orientation = [30 00];
line_length = "6667";
inherent_gain = [31 00];
mclk_multiplier = "11";
pix_clk_hz = "1320000000";
min_gain_val = "1.0";
max_gain_val = "22.3";
min_hdr_ratio = [31 00];
max_hdr_ratio = [31 00];
min_framerate = "1.5";
max_framerate = "60";
min_exp_time = "13";
max_exp_time = "33333";
};
ports {
#address-cells = <0x1>;
#size-cells = <0x0>;
port@0 {
reg = <0x0>;
endpoint {
port-index = <0x0>;
bus-width = <0x8>;
remote-endpoint = <0x2a>;
linux,phandle = <0xa5>;
phandle = <0xa5>;
};
};
};
};
};
spi@3230000 {
compatible = "nvidia,tegra186-spi";
reg = <0x0 0x3230000 0x0 0x10000>;
interrupts = <0x0 0x26 0x4>;
#address-cells = <0x1>;
#size-cells = <0x0>;
iommus = <0x2 0x20>;
dma-coherent;
dmas = <0x1e 0x11 0x1e 0x11>;
dma-names = "rx", "tx";
spi-max-frequency = <0x3dfd240>;
nvidia,clk-parents = "pll_p", "clk_m";
clocks = <0x4 0x89 0x4 0x66 0x4 0xe>;
clock-names = "spi", "pll_p", "clk_m";
resets = <0x5 0x5d>;
reset-names = "spi";
status = "okay";
linux,phandle = <0x173>;
phandle = <0x173>;
spidev@0 {
compatible = "spidev";
reg = <0x0>;
spi-max-frequency = <0x1312d00>;
};
};
pinmux:
pinmux.0x0243d008 = 0x00000450; # spi3_miso_py1: rsvd1, tristate-disable, input-disable, io_high_voltage-disable, lpdr-disable
pinmux.0x0243d060 = 0x00000400; # spi3_mosi_py2: rsvd1, tristate-enable, input-disable, io_high_voltage-disable, lpdr-disable
pinmux.0x0243d028 = 0x00000400; # spi3_cs1_py4: rsvd1, tristate-disable, input-disable, io_high_voltage-disable, lpdr-disable
pinmux.0x0243d048 = 0x00000400; # spi3_sck_py0: rsvd1, pull-down, tristate-enable, input-disable, io_high_voltage-disable, lpdr-disable
pinmux.0x0243d018 = 0x00000400; # spi3_cs0_py3: rsvd1, pull-down, tristate-enable, input-disable, io_high_voltage-disable, lpdr-disable
pinmux.0x0243d040 = 0x00000400; # spi1_sck_pz3: rsvd1, pull-down, tristate-enable, input-enable, lpdr-disable
pinmux.0x0243d020 = 0x00000450; # spi1_miso_pz4: rsvd1, pull-down, tristate-enable, input-enable, lpdr-disable
pinmux.0x0243d058 = 0x00000400; # spi1_mosi_pz5: rsvd1, pull-down, tristate-enable, input-enable, lpdr-disable
pinmux.0x0243d010 = 0x00000400; # spi1_cs0_pz6: rsvd1, pull-up, tristate-enable, input-enable, lpdr-disable
pinmux.0x0243d050 = 0x00000400; # spi1_cs1_pz7: rsvd1, pull-up, tristate-enable, input-enable, lpdr-disable
pinmux.0x0c302048 = 0x00000400; # spi2_sck_pcc0: spi2, tristate-disable, input-disable, io_high_voltage-disable, lpdr-disable
pinmux.0x0c302050 = 0x00000450; # spi2_miso_pcc1: spi2, tristate-enable, input-enable, io_high_voltage-disable, lpdr-disable
pinmux.0x0c302028 = 0x00000400; # spi2_mosi_pcc2: spi2, tristate-disable, input-disable, io_high_voltage-disable, lpdr-disable
pinmux.0x0c302038 = 0x00000400; # spi2_cs0_pcc3: spi2, tristate-disable, input-disable, io_high_voltage-disable, lpdr-disable
I use this command to update dtb:
sudo ./flash.sh -k kernel-dtb jetson-xavier mmcblk0p1
my test result:
spi mode: 0
bits per word: 8
max speed: 1000 Hz (1 KHz)
lsb mode: 0
00 00 00 00 00 00
00 00
I use the devmem2 and found that the spi2 is right and the spi1 and spi3 are wrong, why? I do have changed the /JetPack_4.3_Linux_P2888/Linux_for_Tegra/bootloader/t186ref/BCT/tegra19x-mb1-pinmux-p2888-0000-a04-p2822-0000-b01.cfg. Do I need to change dts file about pinmux or just adjust the cfg file?
spi2:
sudo devmem2 0x0c302050
/dev/mem opened.
Memory mapped at address 0x7f88664000.
Value at address 0xC302050 (0x7f88664050): 0x450
spi3:
sudo devmem2 0x0243d008
/dev/mem opened.
Memory mapped at address 0x7fae042000.
Value at address 0x243D008 (0x7fae042008): 0x1
spi1:
sudo devmem2 0x0243d020
/dev/mem opened.
Memory mapped at address 0x7fa91e0000.
Value at address 0x243D020 (0x7fa91e0020): 0x55
what should I do to debug it?
