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moby: actually, just disable the debug uart pull resistor

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Colin
2024-10-20 08:17:49 +00:00
parent 9d1770f6db
commit 089a379d54
1 changed files with 2 additions and 1 deletions
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3
hosts/modules/hal/pine64-pinephone-pro/rk3399-pinephone-pro-sound.dtso
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@@ -289,10 +289,11 @@
// unfortunately it's not designed to handle below-ground signals. // unfortunately it's not designed to handle below-ground signals.
// long-term fix is to mix a DC offset into the amp output. // long-term fix is to mix a DC offset into the amp output.
// until then, pull RX to *ground* instead of supply, so that it's less affected by (apparent) shorting with the HPOL channel. // until then, pull RX to *ground* instead of supply, so that it's less affected by (apparent) shorting with the HPOL channel.
// or even just leave it without any pull resistor -- so far that seems to be pretty stable?
// note that this only fixes the spurious UART/spurious SYSRQ errors, // note that this only fixes the spurious UART/spurious SYSRQ errors,
// it does not address the distortion likely caused by this. // it does not address the distortion likely caused by this.
rockchip,pins = rockchip,pins =
<4 RK_PC3 1 &pcfg_pull_down>, <4 RK_PC3 1 &pcfg_pull_none>,
<4 RK_PC4 1 &pcfg_pull_none>; <4 RK_PC4 1 &pcfg_pull_none>;
}; };
}; };