arm64: dts: rockchip: use BCLK to GPIO switch on rk3399
We discoverd that the state of BCLK on, LRCLK off and SD_MODE on may cause the speaker melting issue. Removing LRCLK while BCLK is present can cause unexpected output behavior including a large DC output voltage as described in the Max98357a datasheet. In order to: 1. prevent BCLK from turning on by other component. 2. keep BCLK and LRCLK being present at the same time This patch adjusts the device tree to allow BCLK to switch to GPIO func before LRCLK output, and switch back during LRCLK is output. Signed-off-by:Judy Hsiao <judyhsiao@chromium.org> Reviewed-by:
Brian Norris <briannorris@chromium.org> Link: https://lore.kernel.org/r/20220708080726.4170711-1-judyhsiao@chromium.org Signed-off-by:
Heiko Stuebner <heiko@sntech.de>
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