linux-kernel - Re: [PATCH v2 2/2] clk: gate: Add missing fw_name for clk_gate_register_test_parent_data

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Message-ID: <47e7fa4c103d08374d071fdf6de3b8ca.sboyd@kernel.org>
Date:   Fri, 10 Feb 2023 16:52:36 -0800
From:   Stephen Boyd <sboyd@...nel.org>
To:     Christian Marangi <ansuelsmth@...il.com>,
        Michael Turquette <mturquette@...libre.com>,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Christian Marangi <ansuelsmth@...il.com>,
        kernel test robot <oliver.sang@...el.com>
Subject: Re: [PATCH v2 2/2] clk: gate: Add missing fw_name for clk_gate_register_test_parent_data_legacy

Quoting Christian Marangi (2023-01-31 08:08:29)
> Fix warning for missing .fw_name in parent_data based on names.
> It's wrong to define only .name since clk core expect always .fw_name to
> be defined.
> 
> Reported-by: kernel test robot <oliver.sang@...el.com>

What was the report?

> Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
> ---
>  drivers/clk/clk-gate_test.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/clk/clk-gate_test.c b/drivers/clk/clk-gate_test.c
> index e136aaad48bf..a0a63cd4ce0b 100644
> --- a/drivers/clk/clk-gate_test.c
> +++ b/drivers/clk/clk-gate_test.c
> @@ -74,6 +74,7 @@ static void clk_gate_register_test_parent_data_legacy(struct kunit *test)
>                                             1000000);
>         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
>         pdata.name = "test_parent";
> +       pdata.fw_name = "test_parent";
>  
>         ret = clk_hw_register_gate_parent_data(NULL, "test_gate", &pdata, 0,

We don't pass a 'dev' here, so the pdata.index isn't looked at. I
suppose we can assign .index to -1 to be more explicit, but because
there isn't a device used for registering, we won't try to use the
.index. Instead we'll try to use .fw_name for clkdev, of which there
won't be a clkdev lookup either. Eventually we'll fallback to the .name
lookup, and it will be fine.

We need tests that exercises the 'dev' path and also the DT path and the
clkdev path. I was thinking about working on that outside of the gate
test though, and just having a generic clk test for that with simple
clk_ops that do basically nothing.