linux-kernel - Re: [PATCH 0/4] Provide devm_clk_bulk_get_all

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Message-ID: <20240925075654.f2pefosdspqiakvj@thinkpad>
Date: Wed, 25 Sep 2024 09:56:54 +0200
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Russell King <linux@...linux.org.uk>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Jingoo Han <jingoohan1@...il.com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
	Krzysztof Kozlowski <krzk@...nel.org>,
	Alim Akhtar <alim.akhtar@...sung.com>, kernel@...labora.com,
	linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, linux-pci@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org
Subject: Re: [PATCH 0/4] Provide devm_clk_bulk_get_all_enabled() helper

On Wed, Sep 25, 2024 at 09:52:44AM +0200, AngeloGioacchino Del Regno wrote:
> Il 24/09/24 16:36, Manivannan Sadhasivam ha scritto:
> > On Sat, Sep 14, 2024 at 09:04:53PM +0300, Cristian Ciocaltea wrote:
> > > Commit 265b07df758a ("clk: Provide managed helper to get and enable bulk
> > > clocks") added devm_clk_bulk_get_all_enable() function, but missed to
> > > return the number of clocks stored in the clk_bulk_data table referenced
> > > by the clks argument.
> > > 
> > > That is required in case there is a need to iterate these clocks later,
> > > therefore I couldn't see any use case of this parameter and should have
> > > been simply removed from the function declaration.
> > > 
> > 
> > Is there an user that currerntly does this?
> > 
> 
> Yes and the patch wasn't sent upstream yet, but anyway, regardless of that,
> this series is fixing inconsistency with both naming and usage between the
> clock (bulk) API functions, with that being the only function acting
> different from the others, at best confusing people.
> 

I agree with the 'inconsistency' part of the API, but I wouldn't call it as
*broken* as this series does. Please fix that and you can have my:

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

- Mani

> Cheers,
> Angelo
> 
> > - Mani
> > 
> > > The first patch in the series provides devm_clk_bulk_get_all_enabled()
> > > variant, which is consistent with devm_clk_bulk_get_all() in terms of
> > > the returned value:
> > > 
> > >   > 0 if one or more clocks have been stored
> > >   = 0 if there are no clocks
> > >   < 0 if an error occurred
> > > 
> > > Moreover, the naming is consistent with devm_clk_get_enabled(), i.e. use
> > > the past form of 'enable'.
> > > 
> > > The next two patches switch existing users of devm_clk_get_enable() to
> > > the new helper - there were only two, as of next-20240913.
> > > 
> > > The last patch drops the now obsolete devm_clk_bulk_get_all_enable()
> > > helper.
> > > 
> > > Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
> > > ---
> > > Cristian Ciocaltea (4):
> > >        clk: Provide devm_clk_bulk_get_all_enabled() helper
> > >        soc: mediatek: pwrap: Switch to devm_clk_bulk_get_all_enabled()
> > >        PCI: exynos: Switch to devm_clk_bulk_get_all_enabled()
> > >        clk: Drop obsolete devm_clk_bulk_get_all_enable() helper
> > > 
> > >   drivers/clk/clk-devres.c                | 30 ++++++++++++++++--------------
> > >   drivers/pci/controller/dwc/pci-exynos.c |  2 +-
> > >   drivers/soc/mediatek/mtk-pmic-wrap.c    |  4 ++--
> > >   include/linux/clk.h                     | 12 +++++++-----
> > >   4 files changed, 26 insertions(+), 22 deletions(-)
> > > ---
> > > base-commit: 5acd9952f95fb4b7da6d09a3be39195a80845eb6
> > > change-id: 20240912-clk_bulk_ena_fix-16ba77358ddf
> > > 
> > 
> 
> 

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