On 05/09/2013 05:15 PM, Fabio Estevam wrote:
From: Fabio Estevam fabio.estevam@freescale.com
After a 'reboot' command in Linux or after pressing the system's reset button the sgtl5000 driver fails to probe:
sgtl5000 0-000a: Device with ID register ffff is not a sgtl5000 sgtl5000 0-000a: ASoC: failed to probe CODEC -19 imx-sgtl5000 sound.12: ASoC: failed to instantiate card -19 imx-sgtl5000 sound.12: snd_soc_register_card failed (-19)
sgtl5000 codec does not have a reset line, nor a reset command in software, so after a system reset the codec does not contain the default register values from sgtl5000_reg_defaults[] anymore, as these are only valid after a power-on-reset cycle.
Fix this issue by explicitly reading all the reset register values from sgtl5000_reg_defaults[] and writing them back into sgtl5000 to ensure a sane state.
Signed-off-by: Fabio Estevam fabio.estevam@freescale.com
Changes since v4:
- Only call sgtl5000_fill_defaults if we know we have a sgtl5000
Changes since v3:
- Read sgtl5000_reg_defaults and write these values into sgtl5000
Changes since v2:
- Do not use reg_defaults_raw as it is not the correct purpose
- Manually build sgtl5000_reg_default
- Improve commitlog
Changes since v1:
- Remove sgtl5000_reg_defaults array
- Do not use num_reg_defaults_raw sound/soc/codecs/sgtl5000.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+)
Tested-by: Eric Nelson eric.nelson@boundarydevices.com