Debian on HP T5325 Thin Client

(17:52)(hep)~> cat /etc/fw_env.config
/dev/mtd2 0 0x1000

--- kirkwood-t5325.dts.orig	2016-03-13 21:28:54.000000000 -0700
+++ kirkwood-t5325.dts	2016-03-16 00:57:15.370063901 -0700
@@ -204,12 +204,14 @@
 
 		simple-audio-card,mclk-fs = <256>;
 
-		simple-audio-card,cpu {
-			sound-dai = <&audio>;
-		};
-
-		simple-audio-card,codec {
-			sound-dai = <&alc5621>;
+		simple-audio-card,dai-link {
+			format = "i2s";
+			cpu {
+				sound-dai = <&audio>;
+			};
+			codec {
+				sound-dai = <&alc5621>;
+			};
 		};
 	};
 };

[    0.000000] Linux version 2.6.22.18-2-armel (root@lenny-devel) (gcc version 4.2.1) #1 PREEMPT Tue Nov 17 13:34:38 EST 2009
[    0.000000] CPU: ARM926EJ-S [56251311] revision 1 (ARMv5TE), cr=00053977
[    0.000000] Machine: Feroceon-KW
[    0.000000] Using UBoot passing parameters structure
[    0.000000] Memory policy: ECC disabled, Data cache writeback
[    0.000000] CPU0: D VIVT write-back cache
[    0.000000] CPU0: I cache: 16384 bytes, associativity 4, 32 byte lines, 128 sets
[    0.000000] CPU0: D cache: 16384 bytes, associativity 4, 32 byte lines, 128 sets
[    0.000000] Built 1 zonelists.  Total pages: 130048
[    0.000000] Kernel command line: root=/dev/sda1 rw init=/init console=ttyS0,115200

<snip>

Starting hpdmagent: [   32.300000] phys_mem_access_prot called - offset f2001000, uncached_access = -1071249904
hpdmagent.
[   32.400000] phys_mem_access_prot called - offset ec000000, uncached_access = -1071249904
[   32.500000] phys_mem_access_prot called - offset e8000000, uncached_access = -1071249904
 * Starting periodic command scheduler crond                                    [   35.200000] eth0: link up, full duplex, speed 100 Mbps
[   35.210000] eth0: started
 * Starting periodic command scheduler crond                                    crontabs: No such file or directory
crontabs: created
                                                                         [ OK ]
                                                                         [ OK ]

ssh root@192.168.0.15
ssh: connect to host 192.168.0.15 port 22: Connection refused

T0:2345:respawn:/sbin/getty -L ttyS0 115200 linux

> ssh root@192.168.0.15
> ssh: connect to host 192.168.0.15 port 22:
> Connection refused
>

> T0:2345:respawn:/sbin/getty -L ttyS0 115200 linux
>

> --- kirkwood-t5325.dts.orig	2016-03-13
> 21:28:54.000000000 -0700
> +++ kirkwood-t5325.dts	2016-03-16
> 00:57:15.370063901 -0700
> @@ -204,12 +204,14 @@
>  
>  		simple-audio-card,mclk-fs = <256>;
>  
> -		simple-audio-card,cpu {
> -			sound-dai = <&audio>;
> -		};
> -
> -		simple-audio-card,codec {
> -			sound-dai = <&alc5621>;
> +		simple-audio-card,dai-link {
> +			format = "i2s";
> +			cpu {
> +				sound-dai = <&audio>;
> +			};
> +			codec {
> +				sound-dai = <&alc5621>;
> +			};
>  		};
>  	};
>  };
>

(22:00)(hep)~/ws> fdtdump kirkwood-t5325.dtb |tail -14
    sound {
        compatible = "simple-audio-card";
        simple-audio-card,format = "i2s";
        simple-audio-card,routing = [48 65 61 64 70 68 6f 6e 65 20 4a 61 63 6b 00 48 50 4c 00 48 65 61 64 70 68 6f 6e 65 20 4a 61 63 6b 00 48 50 52 00 53 70 65 61 6b 65 72 00 53 50 4b 4f 55 54 00 53 70 65 61 6b 65 72 00 53 50 4b 4f 55 54 4e 00 4d 49 43 31 00 4d 69 63 20 4a 61 63 6b 00 4d 49 43 32 00 4d 69 63 20 4a 61 63 6b 00];
        simple-audio-card,widgets = [48 65 61 64 70 68 6f 6e 65 00 48 65 61 64 70 68 6f 6e 65 20 4a 61 63 6b 00 53 70 65 61 6b 65 72 00 53 70 65 61 6b 65 72 00 4d 69 63 72 6f 70 68 6f 6e 65 00 4d 69 63 20 4a 61 63 6b 00];
        simple-audio-card,mclk-fs = <0x00000100>;
        simple-audio-card,cpu {
            sound-dai = <0x00000017 0x00000000>;
        };
        simple-audio-card,codec {
            sound-dai = <0x00000018>;
        };
    };
};

> (22:00)(hep)~/ws> fdtdump kirkwood-t5325.dtb |tail
> -14
>     sound {
>         compatible = "simple-audio-card";
>         simple-audio-card,format = "i2s";
>         simple-audio-card,routing = [48 65 61 64
> 70 68 6f 6e 65 20 4a 61 63 6b 00 48 50 4c 00 48 65
> 61 64 70 68 6f 6e 65 20 4a 61 63 6b 00 48 50 52 00
> 53 70 65 61 6b 65 72 00 53 50 4b 4f 55 54 00 53 70
> 65 61 6b 65 72 00 53 50 4b 4f 55 54 4e 00 4d 49 43
> 31 00 4d 69 63 20 4a 61 63 6b 00 4d 49 43 32 00 4d
> 69 63 20 4a 61 63 6b 00];
>         simple-audio-card,widgets = [48 65 61 64
> 70 68 6f 6e 65 00 48 65 61 64 70 68 6f 6e 65 20 4a
> 61 63 6b 00 53 70 65 61 6b 65 72 00 53 70 65 61 6b
> 65 72 00 4d 69 63 72 6f 70 68 6f 6e 65 00 4d 69 63
> 20 4a 61 63 6b 00];
>         simple-audio-card,mclk-fs = <0x00000100>;
>         simple-audio-card,cpu {
>             sound-dai = <0x00000017 0x00000000>;
>         };
>         simple-audio-card,codec {
>             sound-dai = <0x00000018>;
>         };
>     };
> };
>

(23:14)(hep)~/ws/pogo/kernel/4.5/linux-4.5> fdtdump arch/arm/boot/dts/kirkwood-t5325.dtb|tail -17
    sound {
        compatible = "simple-audio-card";
        simple-audio-card,routing = [48 65 61 64 70 68 6f 6e 65 20 4a 61 63 6b 00 48 50 4c 00 48 65 61 64 70 68 6f 6e 65 20 4a 61 63 6b 00 48 50 52 00 53 70 65 61 6b 65 72 00 53 50 4b 4f 55 54 00 53 70 65 61 6b 65 72 00 53 50 4b 4f 55 54 4e 00 4d 49 43 31 00 4d 69 63 20 4a 61 63 6b 00 4d 49 43 32 00 4d 69 63 20 4a 61 63 6b 00];
        simple-audio-card,widgets = [48 65 61 64 70 68 6f 6e 65 00 48 65 61 64 70 68 6f 6e 65 20 4a 61 63 6b 00 53 70 65 61 6b 65 72 00 53 70 65 61 6b 65 72 00 4d 69 63 72 6f 70 68 6f 6e 65 00 4d 69 63 20 4a 61 63 6b 00];
        simple-audio-card,mclk-fs = <0x00000100>;
        simple-audio-card,dai-link {
            format = "i2s";
            cpu {
                sound-dai = <0x00000019>;
            };
            codec {
                sound-dai = <0x0000001a>;
            };
        };
    };
};

ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.front