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From: Stephen Boyd <sboyd@kernel.org>
To: Jeffrey Hugo <jhugo@codeaurora.org>,
	Michael Turquette <mturquette@baylibre.com>
Cc: linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org,
	Miquel Raynal <miquel.raynal@bootlin.com>,
	Jerome Brunet <jbrunet@baylibre.com>,
	Russell King <linux@armlinux.org.uk>
Subject: Re: [PATCH 2/9] clk: Introduce get_parent_hw clk op
Date: Fri, 15 Feb 2019 13:29:24 -0800	[thread overview]
Message-ID: <155026616459.115909.14315694127255521155@swboyd.mtv.corp.google.com> (raw)
In-Reply-To: <488f5033-c7a5-b49b-b973-c1415e533019@codeaurora.org>

Quoting Jeffrey Hugo (2019-02-15 11:29:26)
> On 2/15/2019 11:47 AM, Stephen Boyd wrote:
> > Quoting Jeffrey Hugo (2019-02-11 08:09:00)
> >> On 1/28/2019 11:10 PM, Stephen Boyd wrote:
> >>
> >>> +static int clk_init_parent(struct clk_core *core)
> >>> +{
> >>> +     core->parent = __clk_init_parent(core, true);
> >>> +     if (IS_ERR(core->parent))
> >>> +             return PTR_ERR(core->parent);
> >>> +
> >>> +     /*
> >>> +      * Populate core->parent if parent has already been clk_core_init'd. If
> >>> +      * parent has not yet been clk_core_init'd then place clk in the orphan
> >>> +      * list.  If clk doesn't have any parents then place it in the root
> >>> +      * clk list.
> >>> +      *
> >>> +      * Every time a new clk is clk_init'd then we walk the list of orphan
> >>> +      * clocks and re-parent any that are children of the clock currently
> >>> +      * being clk_init'd.
> >>> +      */
> >>> +     if (core->parent) {
> >>> +             hlist_add_head(&core->child_node,
> >>> +                             &core->parent->children);
> >>> +             core->orphan = core->parent->orphan;
> >>> +     } else if (!core->num_parents) {
> >>> +             hlist_add_head(&core->child_node, &clk_root_list);
> >>> +             core->orphan = false;
> >>> +     } else {
> >>> +             hlist_add_head(&core->child_node, &clk_orphan_list);
> >>
> >> Missing "core->orphan = true;"?
> >> The snippet below had that line.  Its not clear why it appears to be
> >> dropped here.
> >>
> > 
> > Hmm. Weird. I think I may have been getting ahead of myself and moving
> > the orphan updating code into __clk_init_parent(). I can't remember why
> > though, so I guess I'll go all the way and move it all into
> > __clk_init_parent() now. Thanks for pointing it out.
> > 
> 
> No problem.
> 
> Just FYI, I've rebased the 8998 mmcc series on top of this, and as far 
> as I can tell, everything seems to be working great.
> 

Cool. Are you using the new way to specify parents or have you
maintained the previous design of using string names for parents?


  reply	other threads:[~2019-02-15 21:29 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-29  6:10 [PATCH 0/9] Rewrite clk parent handling Stephen Boyd
2019-01-29  6:10 ` [PATCH 1/9] clk: Combine __clk_get() and __clk_create_clk() Stephen Boyd
2019-01-29  6:10 ` [PATCH 2/9] clk: Introduce get_parent_hw clk op Stephen Boyd
2019-01-29  9:34   ` Jerome Brunet
2019-01-29 21:15     ` Stephen Boyd
2019-01-30  9:53       ` Jerome Brunet
2019-01-30 21:30         ` Stephen Boyd
2019-01-31 18:40           ` Jerome Brunet
2019-02-06  0:01             ` Stephen Boyd
2019-02-13  9:16               ` Jerome Brunet
2019-02-15 17:01                 ` Stephen Boyd
2019-02-11 16:09   ` Jeffrey Hugo
2019-02-15 18:47     ` Stephen Boyd
2019-02-15 19:29       ` Jeffrey Hugo
2019-02-15 21:29         ` Stephen Boyd [this message]
2019-02-15 21:34           ` Jeffrey Hugo
2019-01-29  6:10 ` [PATCH 3/9] clk: core: clarify the check for runtime PM Stephen Boyd
2019-01-29  6:10 ` [PATCH 4/9] clk: Introduce of_clk_get_hw_from_clkspec() Stephen Boyd
2019-01-29  6:10 ` [PATCH 5/9] clk: Inform the core about consumer devices Stephen Boyd
2019-01-29  6:10 ` [PATCH 6/9] clk: Move of_clk_*() APIs into clk.c from clkdev.c Stephen Boyd
2019-01-29  6:10 ` [PATCH 7/9] clk: Allow parents to be specified without string names Stephen Boyd
2019-01-29 10:12   ` Jerome Brunet
2019-01-29 18:56     ` Stephen Boyd
2019-01-29 21:08       ` Jerome Brunet
2019-02-13  9:32       ` Jerome Brunet
2019-02-15 21:13         ` Stephen Boyd
2019-01-29  6:10 ` [PATCH 8/9] clk: qcom: gcc-sdm845: Migrate to DT parent mapping Stephen Boyd
2019-01-29  6:10 ` [PATCH 9/9] arm64: dts: qcom: Specify XO clk as input to GCC node Stephen Boyd
2019-01-29 10:12 ` [PATCH 0/9] Rewrite clk parent handling Miquel Raynal

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