Part Number: PROCESSOR-SDK-AM437X
Other Parts Discussed in Thread: AM4378, TAS2557, AM4372
Tool/software: Linux
We are trying to Integrated tas2557 on TI's am4378 based custom board. Following are the changes made in dts file:
sound0: sound0 {
compatible = "simple-audio-card";
simple-audio-card,name = "AM437x-GP-EVM";
simple-audio-card,widgets =
"Speaker", "Speaker";
simple-audio-card,routing =
"Speaker", "SPK";
simple-audio-card,format = "dsp_b";
simple-audio-card,bitclock-master = <&sound0_master>;
simple-audio-card,frame-master = <&sound0_master>;
simple-audio-card,bitclock-inversion;
simple-audio-card,cpu {
sound-dai = <&mcasp1>;
system-clock-frequency = <12000000>;
};
sound0_master: simple-audio-card,codec {
sound-dai = <&tas2557>;
system-clock-frequency = <12000000>;
};
};
&i2c0 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&i2c0_pins>;
clock-frequency = <100000>;
tas2557: tas2557@4c {
#sound-dai-cells = <1>;
compatible = "ti,tas2557";
reg = <0x4c>;
status = "okay";
/* ti,cdc-reset-gpio = <&msmgpio 73 0>;*/
ti,irq-gpio = <&gpio5 4 0>;
ti,i2s-bits = <16>; /* support 16, 24, 32 */
/* Regulators */
};
};
&mcasp1 {
#sound-dai-cells = <0>;
pinctrl-names = "default", "sleep";
pinctrl-0 = <&mcasp1_pins>;
pinctrl-1 = <&mcasp1_sleep_pins>;
status = "okay";
op-mode = <0>; /* MCASP_IIS_MODE */
tdm-slots = <2>;
/* 4 serializers */
serial-dir = < /* 0: INACTIVE, 1: TX, 2: RX */
0 0 1 2
>;
tx-num-evt = <32>;
rx-num-evt = <32>;
};
mcasp1_pins: mcasp1_pins {
pinctrl-single,pins = <
AM4372_IOPAD(0x9a0, PIN_INPUT | MUX_MODE3) /* mii1_col.mcasp1_axr2 */
AM4372_IOPAD(0x9a4, PIN_INPUT | MUX_MODE3) /* mii1_crs.mcasp1_aclkx */
AM4372_IOPAD(0x9a8, PIN_INPUT | MUX_MODE3) /* mii1_rxerr.mcasp1_fsx */
AM4372_IOPAD(0x9ac, PIN_INPUT | MUX_MODE3) /* rmii1_ref_clk.mcasp1_axr3 */
>;
};
mcasp1_sleep_pins: mcasp1_sleep_pins {
pinctrl-single,pins = <
AM4372_IOPAD(0x9a0, PIN_INPUT_PULLDOWN | MUX_MODE7)
AM4372_IOPAD(0x9a4, PIN_INPUT_PULLDOWN | MUX_MODE7)
AM4372_IOPAD(0x9a8, PIN_INPUT_PULLDOWN | MUX_MODE7)
AM4372_IOPAD(0x9ac, PIN_INPUT_PULLDOWN | MUX_MODE7)
>;
};
Other than this we added the respective driver in linux/sound/soc/codecs and chenged the respective Makefile and Kconfig file accordingly
config SND_SOC_ALL_CODECS
select SND_SOC_TAS2557 if I2C
config SND_SOC_TAS2557
tristate "Texas Instruments TAS2557 speaker amplifier"
depends on I2C
select TAS2557_REGMAP
select TAS2557_CODEC
select TAS2557_MISC
But still while booting its not detecting the sound card and giving the following error:
[ 4.181720] No soundcards found.
[ 13.777855] OF: /sound0/simple-audio-card,codec: arguments longer than property
[ 13.860814] asoc-simple-card sound0: parse error -22
[ 13.947918] asoc-simple-card: probe of sound0 failed with error -22
Please suggest on how to resolve the above problem?
