linux-kernel - Re: [PATCH 6/7] clk: meson: axg-audio: provide clk top signal name

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Date:   Fri, 27 Sep 2019 11:37:20 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Jerome Brunet <jbrunet@...libre.com>
Cc:     Kevin Hilman <khilman@...libre.com>,
        linux-amlogic@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/7] clk: meson: axg-audio: provide clk top signal name

On 27/09/2019 11:14, Neil Armstrong wrote:
> On 24/09/2019 17:33, Jerome Brunet wrote:
>> The peripheral clock on the sm1 goes through some muxes
>> and dividers before reaching the audio gates. To model that,
>> without repeating our self too much, the "top" clock signal
>> is introduced and will serve as a the parent of the gates.
>>
>> On the axg and g12a, the top clock is just a pass-through to
>> the audio peripheral clock provided by the main controller.
>>
>> Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
>> ---
>>  drivers/clk/meson/axg-audio.c | 19 ++++++++++++++++---
>>  drivers/clk/meson/axg-audio.h |  3 ++-
>>  2 files changed, 18 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/clk/meson/axg-audio.c b/drivers/clk/meson/axg-audio.c
>> index ce8836776d1c..a8ccdbaecae2 100644
>> --- a/drivers/clk/meson/axg-audio.c
>> +++ b/drivers/clk/meson/axg-audio.c
>> @@ -74,9 +74,7 @@
>>  	.hw.init = &(struct clk_init_data) {				\
>>  		.name = "aud_"#_name,					\
>>  		.ops = &clk_regmap_gate_ops,				\
>> -		.parent_data = &(const struct clk_parent_data) {	\
>> -			.fw_name = "pclk",				\
>> -		},							\
>> +		.parent_names = (const char *[]){ "aud_top" },		\
>>  		.num_parents = 1,					\
>>  	},								\
>>  }
>> @@ -504,6 +502,19 @@ static struct clk_regmap tdmout_c_lrclk =
>>  	AUD_TDM_LRLCK(out_c, AUDIO_CLK_TDMOUT_C_CTRL);
>>  
>>  /* AXG/G12A Clocks */
>> +
>> +static struct clk_hw axg_aud_top = {
>> +	.init = &(struct clk_init_data) {
>> +		/* Provide aud_top signal name on axg and g12a */
>> +		.name = "aud_top",
>> +		.ops = &(const struct clk_ops) {},
>> +		.parent_data = &(const struct clk_parent_data) {
>> +			.fw_name = "pclk",
>> +		},
>> +		.num_parents = 1,
>> +	},
>> +};
>> +
>>  static struct clk_regmap mst_a_mclk_sel =
>>  	AUD_MST_MCLK_MUX(mst_a_mclk, AUDIO_MCLK_A_CTRL);
>>  static struct clk_regmap mst_b_mclk_sel =
>> @@ -691,6 +702,7 @@ static struct clk_hw_onecell_data axg_audio_hw_onecell_data = {
>>  		[AUD_CLKID_TDMOUT_A_LRCLK]	= &tdmout_a_lrclk.hw,
>>  		[AUD_CLKID_TDMOUT_B_LRCLK]	= &tdmout_b_lrclk.hw,
>>  		[AUD_CLKID_TDMOUT_C_LRCLK]	= &tdmout_c_lrclk.hw,
>> +		[AUD_CLKID_TOP]			= &axg_aud_top,
>>  		[NR_CLKS] = NULL,
>>  	},
>>  	.num = NR_CLKS,
>> @@ -835,6 +847,7 @@ static struct clk_hw_onecell_data g12a_audio_hw_onecell_data = {
>>  		[AUD_CLKID_TDM_SCLK_PAD0]	= &g12a_tdm_sclk_pad_0.hw,
>>  		[AUD_CLKID_TDM_SCLK_PAD1]	= &g12a_tdm_sclk_pad_1.hw,
>>  		[AUD_CLKID_TDM_SCLK_PAD2]	= &g12a_tdm_sclk_pad_2.hw,
>> +		[AUD_CLKID_TOP]			= &axg_aud_top,
>>  		[NR_CLKS] = NULL,
>>  	},
>>  	.num = NR_CLKS,
>> diff --git a/drivers/clk/meson/axg-audio.h b/drivers/clk/meson/axg-audio.h
>> index c00e28b2e1a9..a4956837f597 100644
>> --- a/drivers/clk/meson/axg-audio.h
>> +++ b/drivers/clk/meson/axg-audio.h
>> @@ -116,9 +116,10 @@
>>  #define AUD_CLKID_SPDIFOUT_B_CLK_SEL	153
>>  #define AUD_CLKID_SPDIFOUT_B_CLK_DIV	154
>>  
>> +
> 
> AUD_CLKID_TOP seems to be missing here

Oh, yes it was exposed, do you need to it to be exposed since it's dummy for G12A ?

Neil

> 
> 
>>  /* include the CLKIDs which are part of the DT bindings */
>>  #include <dt-bindings/clock/axg-audio-clkc.h>
>>  
>> -#define NR_CLKS	163
>> +#define NR_CLKS	164
>>  
>>  #endif /*__AXG_AUDIO_CLKC_H */
>>
>