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Use clk_prepare_enable()/clk_disable_unprepare() in preparation for switch to Common Clock Framework, otherwise the following is visible: WARNING: CPU: 0 PID: 1 at drivers/clk/clk.c:1011 clk_core_enable+0x9c/0xbc Enabling unprepared m2p0 ... Hardware name: Cirrus Logic EDB9302 Evaluation Board ... clk_core_enable clk_core_enable_lock ep93xx_dma_alloc_chan_resources dma_chan_get find_candidate __dma_request_channel snd_dmaengine_pcm_request_channel dmaengine_pcm_new snd_soc_pcm_component_new soc_new_pcm snd_soc_bind_card edb93xx_probe ... ep93xx-i2s ep93xx-i2s: Missing dma channel for stream: 0 ep93xx-i2s ep93xx-i2s: ASoC: error at snd_soc_pcm_component_new on ep93xx-i2s: -22 edb93xx-audio edb93xx-audio: ASoC: can't create pcm CS4271 HiFi :-22 edb93xx-audio edb93xx-audio: snd_soc_register_card() failed: -22 edb93xx-audio: probe of edb93xx-audio failed with error -22 Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com> Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20210726140001.24820-6-nikita.shubin@maquefel.me Signed-off-by: Vinod Koul <vkoul@kernel.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.