topic Re: SGTL5000 hangs I2C bus Issue in i.MX Processors

SGTL5000 hangs I2C bus Issue

pinkesh — Fri, 01 Apr 2016 06:26:49 GMT

Hello ,

We have a custom board and SGTL500 chip .And for this we have programmed board with bare-metal not Linux .

As per discussed in the mentioned link , after power cycle we need to fill SGTL registers with default values .

https://community.freescale.com/message/482530#comment-482531

ASoC: sgtl5000: Fix driver probe after reset · wandboard-org/linux@a648586 · GitHub

In our environment ,When we try to write reg with defaults value that too fails.

We have use PLL with integer divisor and fractional divisor equal to 16 and 786 respectively.

SYS_FS = 8 KHz

Provided System main clock = 12 MHz,

What needs to be done to resolve this issue ?? Please let me know.

SGTL5000 registers are configured in the following order

ANA_POWER	0x4060
LINREG_CTRL	0x6C
REF_CTRL	0x1F2
SHORT_CTRL	0x4446
ANA_CTRL	0x122 (Headphone Unmute)
CLK_TOP_CTRL	0x0
PLL_CTRL	0x8312
ANA_POWER	0x5BA
CLK_CTRL	0x003B
DIG_POWER	0x63
SSS_CTRL	0x70
ADCDAC_CTRL	0x0
DAC_VOL	0x3C3C
DAP_CTRL	0x0
I2S_CTRL	0x1B0
MIC_CTRL	0x170
ANA_HP_CTRL	0x1E1E
ANA_ADC_CTRL	0x0
ANA_STATUS	0x17

- Pinkesh

Re: SGTL5000 hangs I2C bus Issue

pinkesh — Fri, 01 Apr 2016 06:33:50 GMT

We have applied external VDDD @ 1.8 V.

Re: SGTL5000 hangs I2C bus Issue

art — Mon, 04 Apr 2016 11:22:21 GMT

Please always follow the chip initialization sequence, given in the Section 2.2 "Chip Configuration" of the attached App Note document.

Have a great day,
Artur

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