linux-kernel - Re: [PATCH v2 0/4] Provide devm_clk_bulk_get_all

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Message-ID: <bi7pxgkf6qylkcfa6x2uerfe6zyctbidwravqb4okefjctlvuu@fxmi4pt3fktu>
Date: Wed, 16 Oct 2024 18:07:09 +0200
From: Sebastian Reichel <sebastian.reichel@...labora.com>
To: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
Cc: Michael Turquette <mturquette@...libre.com>, 
	Stephen Boyd <sboyd@...nel.org>, Russell King <linux@...linux.org.uk>, 
	Matthias Brugger <matthias.bgg@...il.com>, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, Jingoo Han <jingoohan1@...il.com>, 
	Lorenzo Pieralisi <lpieralisi@...nel.org>, Krzysztof Wilczyński <kw@...ux.com>, 
	Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>, 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 v2 0/4] Provide devm_clk_bulk_get_all_enabled() helper

Hi,

On Wed, Oct 16, 2024 at 12:28:37PM +0300, Cristian Ciocaltea wrote:
> On 9/26/24 1:43 PM, 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.
> > 
> > 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>
> > ---
> > Changes in v2:
> > - Dropped references to 'broken' API in commit descriptions, per Mani's
> >   suggestion
> > - Added R-b tags from Angelo and Mani
> > - Link to v1:
> >   https://lore.kernel.org/r/20240914-clk_bulk_ena_fix-v1-0-ce3537585c06@collabora.com
> 
> [...]
> 
> This still applies cleanly on next-20241016 and there are no new users
> of devm_clk_bulk_get_all_enable(), hence I wonder if anything else is
> missing to get it merged.

FWIW another potential user for the new function is just being added
to the kernel:

https://lore.kernel.org/linux-rockchip/20241011065140.19999-1-frawang.cn@gmail.com/

Greetings,

-- Sebastian

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