linux-kernel - Re: [PATCH v2] clk: qcom: gcc-sc8280xp: add cxo as parent for three ufs ref clks

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Message-ID: <20221115125008.tv2x2fa76i24wkx6@halaney-x13s>
Date:   Tue, 15 Nov 2022 06:50:08 -0600
From:   Andrew Halaney <ahalaney@...hat.com>
To:     Johan Hovold <johan@...nel.org>
Cc:     Shazad Hussain <quic_shazhuss@...cinc.com>, andersson@...nel.org,
        sboyd@...nel.org, bmasney@...hat.com, agross@...nel.org,
        mturquette@...libre.com, Konrad Dybcio <konrad.dybcio@...aro.org>,
        Vinod Koul <vkoul@...nel.org>, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] clk: qcom: gcc-sc8280xp: add cxo as parent for three
 ufs ref clks

On Tue, Nov 15, 2022 at 01:08:11PM +0100, Johan Hovold wrote:
> On Tue, Nov 15, 2022 at 03:52:17PM +0530, Shazad Hussain wrote:
> > Added parent_data as CXO for three UFS reference clocks named,
> > gcc_ufs_ref_clkref_clk, gcc_ufs_card_clkref_clk and
> > gcc_ufs_1_card_clkref_clk.
> 
> The commit message should explain why this is needed rather than just
> state what is being done. For example, something along the lines of
> 
> 	The three UFS reference clocks gcc_ufs_ref_clkref_clk,
> 	gcc_ufs_card_clkref_clk and gcc_ufs_1_card_clkref_clk are all
> 	sourced from CXO.
> 
> 	Update the clock driver to describe this.
> 
> should do.
> 
> > Fixes: d65d005f9a6c ("clk: qcom: add sc8280xp GCC driver")
> > Link: https://lore.kernel.org/lkml/Y2Tber39cHuOSR%2FW@hovoldconsulting.com/
> > Signed-off-by: Shazad Hussain <quic_shazhuss@...cinc.com>
> 
> Tested-by: Johan Hovold <johan+linaro@...nel.org>
> 
> And with a tweaked commit message you can also add:
> 
> Reviewed-by: Johan Hovold <johan+linaro@...nel.org>

Thanks for the patch Shazad! Same as Johan, you can add my T-B:

Tested-by: Andrew Halaney <ahalaney@...hat.com>

and with a tweaked commit message my R-B (based on Bjorn's comments
about hw documentation in v1):

Reviewed-by: Andrew Halaney <ahalaney@...hat.com>

> 
> >---
> > Changes since v1:
> > - Renamed patch subject. Did not include Brian's T-b comment.
> > - Added parent data for two ufs phy ref clocks.
> > 
> > v1 of this patch can be found at
> > https://lore.kernel.org/all/20221030142333.31019-1-quic_shazhuss@quicinc.com/
> > 
> > used below patches for verification on next-20221114
> > https://lore.kernel.org/lkml/20221104092045.17410-2-johan+linaro@kernel.org/
> > https://lore.kernel.org/lkml/20221104092045.17410-3-johan+linaro@kernel.org/
> > https://lore.kernel.org/lkml/20221111113732.461881-1-thierry.reding@gmail.com/
> > 
> >  drivers/clk/qcom/gcc-sc8280xp.c | 6 ++++++
> >  1 file changed, 6 insertions(+)
> > 
> > diff --git a/drivers/clk/qcom/gcc-sc8280xp.c b/drivers/clk/qcom/gcc-sc8280xp.c
> > index a18ed88f3b82..b3198784e1c3 100644
> > --- a/drivers/clk/qcom/gcc-sc8280xp.c
> > +++ b/drivers/clk/qcom/gcc-sc8280xp.c
> > @@ -5364,6 +5364,8 @@ static struct clk_branch gcc_ufs_1_card_clkref_clk = {
> >  		.enable_mask = BIT(0),
> >  		.hw.init = &(const struct clk_init_data) {
> >  			.name = "gcc_ufs_1_card_clkref_clk",
> > +			.parent_data = &gcc_parent_data_tcxo,
> > +			.num_parents = 1,
> >  			.ops = &clk_branch2_ops,
> >  		},
> >  	},
> > @@ -5432,6 +5434,8 @@ static struct clk_branch gcc_ufs_card_clkref_clk = {
> >  		.enable_mask = BIT(0),
> >  		.hw.init = &(const struct clk_init_data) {
> >  			.name = "gcc_ufs_card_clkref_clk",
> > +			.parent_data = &gcc_parent_data_tcxo,
> > +			.num_parents = 1,
> >  			.ops = &clk_branch2_ops,
> >  		},
> >  	},
> > @@ -5848,6 +5852,8 @@ static struct clk_branch gcc_ufs_ref_clkref_clk = {
> >  		.enable_mask = BIT(0),
> >  		.hw.init = &(const struct clk_init_data) {
> >  			.name = "gcc_ufs_ref_clkref_clk",
> > +			.parent_data = &gcc_parent_data_tcxo,
> > +			.num_parents = 1,
> >  			.ops = &clk_branch2_ops,
> >  		},
> >  	},
> 
> Johan
>