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author | Janusz Krzysztofik <jmkrzyszt@gmail.com> | 2018-11-23 12:19:45 +0100 |
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committer | Tony Lindgren <tony@atomide.com> | 2018-12-07 08:26:53 -0800 |
commit | 2afdb4c41d7876e430b9bc6e2d7e2fe28609fd6a (patch) | |
tree | 51743d37ac81dd9883439efce35defc3592a0cfa /drivers/crypto | |
parent | 651022382c7f8da46cb4872a545ee1da6d097d2a (diff) |
ARM: OMAP1: ams-delta: Fix audio permanently muted
Since commit 1137ceee76ba ("ARM: OMAP1: ams-delta: Don't request unused
GPIOs"), on-board audio has appeared muted. Believed to be unused GPIO
pin "hookflash1", apparently set high regardless of the corresponding
bit of "latch2" port attempted to be set low during .init_machine(),
has been identified as the reason.
According to Amstrad E3 wiki, the purpose of the pin hasn't been
clearly identified. Original Amstrad software used to produce a high
pulse on it when the phone was taken off hook or recall was pressed.
With the current finding, we can assume the pin provides a kind of
audio mute function.
Proper resolution of the issue should be done in two steps:
- resolution of an issue with the pin state not reflecting the value
the corresponding bit of the port was attempted to be initialized
with,
- extension of on-board audio driver with a new control.
For now, rename the pin to "audio_mute" to reflect its function and,
as a quick fix, hogg it as output low so on-board audio can produce
audible sound again.
Fixes: 1137ceee76ba ("ARM: OMAP1: ams-delta: Don't request unused GPIOs")
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'drivers/crypto')
0 files changed, 0 insertions, 0 deletions