• SSM4567

• EVAL-SSM4567Z

TheI2Caddress of the SSM4567 depends on the setting of the ADDR pin.

staticstructi2c_board_info __initdata bfin_i2c_board_info[]={[--snip--]{I2C_BOARD_INFO("ssm4567",0x34),},[--snip--]}

staticint__init stamp_init(void){[--snip--]i2c_register_board_info(0,bfin_i2c_board_info,ARRAY_SIZE(bfin_i2c_board_info));[--snip--]return0;}arch_initcall(board_init);

i2s: i2c@41600000 { compatible = "...; ... #size-cells = <0>; #address-cells = <1>; ssm4567: ssm4567@34 { compatible = "adi,ssm4567"; reg = <0x34>; }; };

The amplifier driver registers one DAIs, one for each serial port. The DAI is named“ssm4567-hifi”

If you want to use the SSM4567 in TDM mode you can configure it using snd_soc_dai_set_tdm_slot() from you ASoC board driver.

The following restrictions apply to the parameters of snd_soc_dai_set_tdm_slot().

• tx_maskspecifies the output channel mapping for the serial port. This must either be 0, or the same as rx_mask.
• rx_maskspecifies the input channel mapping for the serial port. There must be exactly one bit set in this mask which selects the slot that is used.
• slotsshould be between 1 and 8
• widthmust be either 32, 48, 64

Example:

staticintssm4567_link_init(structsnd_soc_pcm_runtime*rtd){intret;ret=snd_soc_dai_set_tdm_slot(rtd->codec_dai,0x01,0x01,8,32);if(ret<0)returnret;return0;}staticstructsnd_soc_dai_link ssm4567_dai_link={...,.init=ssm4567_link_init,};

staticconststructsnd_soc_dapm_widget ssm4567_zed_widgets[]={SND_SOC_DAPM_SPK("Speaker",NULL),};staticconststructsnd_soc_dapm_route ssm4567_zed_routes[]={{"Speaker",NULL,"OUT"},};staticstructsnd_soc_dai_link ssm4567_zed_dai_link={.name="ssm4567",.stream_name="ssm4567",.codec_dai_name="ssm4567-hifi",.dai_fmt=SND_SOC_DAIFMT_DSP_A|SND_SOC_DAIFMT_NB_NF|SND_SOC_DAIFMT_CBS_CFS,.init=ssm4567_zed_init,};staticstructsnd_soc_card ssm4567_zed_card={.name="ZED SSM4567",.owner=THIS_MODULE,.dai_link=&zed_ssm4567_dai_link,.num_links=1,.dapm_widgets=zed_ssm4567_widgets,.num_dapm_widgets=ARRAY_SIZE(zed_ssm4567_widgets),.dapm_routes=zed_ssm4567_routes,.num_dapm_routes=ARRAY_SIZE(zed_ssm4567_routes),.fully_routed=true,};

This example shows how to setup a ASoC board driver for a system with two SSM4567, one driving the left speaker and the other driving the right speaker. In this example the left SSM4567 is atI2Caddress 0x34 (ADDR=0) and the right SSM4567 is at I2S address 0x35 (ADDR=1).

Note support for multiple CODECs on a single DAI link requires Linux v3.17 or higher.

staticintssm4567_link_init(structsnd_soc_pcm_runtime*rtd){intret;/* Slot 0 for left */ret=snd_soc_dai_set_tdm_slot(rtd->codec_dais[0],0x01,0x01,2,32);if(ret<0)returnret;/* Slot 2 for right */ret=snd_soc_dai_set_tdm_slot(rtd->codec_dais[1],0x02,0x02,2,32);if(ret<0)returnret;return0;}staticconststructsnd_soc_dapm_widget ssm4567_zed_widgets[]={SND_SOC_DAPM_SPK("Left Speaker",NULL),SND_SOC_DAPM_SPK("Right Speaker",NULL),};staticconststructsnd_soc_dapm_route ssm4567_zed_routes[]={{"Left Speaker",NULL,"Left OUT"},{"Right Speaker",NULL,"Right OUT"},};staticconstsnd_soc_dai_link_component ssm4567_zed_codec_components[]={{/* Left */.name="ssm4567.0-0034",.codec_dai_name="ssm4567-hifi",},{/* Right */.name="ssm4567.0-0035",.codec_dai_name="ssm4567-hifi",},};/* Assign prefix to avoid name conflicts */staticconststructsnd_soc_codec_conf ssm4567_zed_codec_conf[]={{.dev_name="ssm4567.0-0034",.name_prefix="Left",},{.dev_name="ssm4567.0-0035",.name_prefix="Right",},};staticstructsnd_soc_dai_link ssm4567_zed_dai_link={.name="ssm4567",.stream_name="ssm4567",.codecs=ssm4567_zed_codec_components,.num_codecs=ARRAY_SIZE(ssm4567_zed_codec_components),.codec_conf=ssm4567_zed_codec_conf,.num_configs=ARRAY_SIZE(ssm4567_zed_codec_conf),.dai_fmt=SND_SOC_DAIFMT_DSP_A|SND_SOC_DAIFMT_NB_NF|SND_SOC_DAIFMT_CBS_CFS,.init=ssm4567_link_init,};staticstructsnd_soc_card ssm4567_zed_card={.name="ZED SSM4567",.owner=THIS_MODULE,.dai_link=&zed_ssm4567_dai_link,.num_links=1,.dapm_widgets=zed_ssm4567_widgets,.num_dapm_widgets=ARRAY_SIZE(zed_ssm4567_widgets),.dapm_routes=zed_ssm4567_routes,.num_dapm_routes=ARRAY_SIZE(zed_ssm4567_routes),.fully_routed=true,};

• SSM4329 Linux Driver