linux-kernel - Re: [PATCH] clk: qcom: rpmh: add support for SM6350 rpmh IPA clock

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Date:   Mon, 28 Nov 2022 19:54:25 -0600
From:   Alex Elder <elder@...aro.org>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     sboyd@...nel.org, mturquette@...libre.com, andersson@...nel.org,
        konrad.dybcio@...aro.org, agross@...nel.org,
        Luca Weiss <luca.weiss@...rphone.com>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] clk: qcom: rpmh: add support for SM6350 rpmh IPA clock

On 11/28/22 7:35 PM, Dmitry Baryshkov wrote:
> On Tue, 29 Nov 2022 at 02:00, Alex Elder <elder@...aro.org> wrote:
>>
>> From: Luca Weiss <luca.weiss@...rphone.com>
>>
>> The IPA core clock is required for SM6350.  Define it.
>>
>> Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
>> ---
>>   drivers/clk/qcom/clk-rpmh.c | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/drivers/clk/qcom/clk-rpmh.c b/drivers/clk/qcom/clk-rpmh.c
>> index 0471bab824642..6a5887aae21a4 100644
>> --- a/drivers/clk/qcom/clk-rpmh.c
>> +++ b/drivers/clk/qcom/clk-rpmh.c
>> @@ -603,6 +603,7 @@ static const struct clk_rpmh_desc clk_rpmh_sc7280 = {
>>   DEFINE_CLK_RPMH_VRM(sm6350, ln_bb_clk2, ln_bb_clk2_ao, "lnbclkg2", 4);
>>   DEFINE_CLK_RPMH_VRM(sm6350, ln_bb_clk3, ln_bb_clk3_ao, "lnbclkg3", 4);
>>   DEFINE_CLK_RPMH_ARC(sm6350, qlink, qlink_ao, "qphy.lvl", 0x1, 4);
>> +DEFINE_CLK_RPMH_BCM(sm6350, ipa, "IP0");

So you're saying that the above line is unnecessary...

>>   static struct clk_hw *sm6350_rpmh_clocks[] = {
>>          [RPMH_CXO_CLK]          = &sc7280_bi_tcxo.hw,
>> @@ -613,6 +614,7 @@ static struct clk_hw *sm6350_rpmh_clocks[] = {
>>          [RPMH_LN_BB_CLK3_A]     = &sm6350_ln_bb_clk3_ao.hw,
>>          [RPMH_QLINK_CLK]        = &sm6350_qlink.hw,
>>          [RPMH_QLINK_CLK_A]      = &sm6350_qlink_ao.hw,
>> +       [RPMH_IPA_CLK]          = &sm6350_ipa.hw,

...and that this line (above) can instead look like this:

	[RPMH_IPA_CLK]		= &sdm845_ipa.hw,

Correct?

> This can use sdm845_ipa.hw instead of defining new clocks.

Your statement seems to also be true for the [RPMH_IPA_CLK]
entry in sdx55_rpmh_clocks[].  (For the record, the commit
that added that one was authored by me, and I didn't realize
what you have stated here.)

Please confirm, and I'll update.

I'll also send another patch to remove the definition of
sdx55_ipa if Mani is willing to test it for me...

Thank you Dmitry.

					-Alex

>>   };
>>
>>   static const struct clk_rpmh_desc clk_rpmh_sm6350 = {
>> --
>> 2.34.1
>>
> 
>