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SubjectRe: [PATCH] clk: imx25: set correct parents for ssi ipg clocks
Hi Martin,

On Thu, Mar 8, 2018 at 11:08 AM, Martin Kaiser <> wrote:
> Hi Fabio,
> Thus wrote Fabio Estevam (
>> I get audio working from SSI1, but I guess this is due to the fact
>> that the bootloader enables the SSI clock:
>> I have the following in U-Boot:
>> /* Enable the clocks */
>> DATA 4 0x53f8000c 0x1fffffff
>> DATA 4 0x53f80010 0xffffffff
>> DATA 4 0x53f80014 0xfdfff
> I'm using the same initial settings.
> Nevertheless, ssi1_ipg_per is disbled after loading the kernel.
> Digging into this a bit more, it turned out that without my patch,
> clk_disable_unused() recognizes ssi1_ipg_per as unused and disables it.
> If my patch is applied and ssi1_ipg_per is declared as parent of
> ssi1_ipg, clk_disable_unused() will not disable it and fsl_ssi_startup()
> will enable both ssi1_ipg_per and ssi1_ipg before playing sound.

I can get audio to work fine without your patch on a mx25pdk.

In the other i.MX clock drivers we have this same pattern:

clks[IMX6SL_CLK_SSI1_IPG] = imx_clk_gate2_shared("ssi1_ipg", "ipg",

It is not clear to me what is the real issue this patch is trying to fix.


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