linux-clk.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Stephen Boyd <sboyd@kernel.org>
To: Andy Gross <agross@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Niklas Cassel <niklas.cassel@linaro.org>
Cc: linux-arm-msm@vger.kernel.org, amit.kucheria@linaro.org,
	Niklas Cassel <niklas.cassel@linaro.org>,
	Michael Turquette <mturquette@baylibre.com>,
	linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 7/7] clk: qcom: apcs-msm8916: use clk_parent_data to specify the parent
Date: Wed, 18 Dec 2019 22:23:39 -0800	[thread overview]
Message-ID: <20191219062339.DC0DE21582@mail.kernel.org> (raw)
In-Reply-To: <20191125135910.679310-8-niklas.cassel@linaro.org>

Quoting Niklas Cassel (2019-11-25 05:59:09)
> diff --git a/drivers/clk/qcom/apcs-msm8916.c b/drivers/clk/qcom/apcs-msm8916.c
> index 46061b3d230e..bb91644edc00 100644
> --- a/drivers/clk/qcom/apcs-msm8916.c
> +++ b/drivers/clk/qcom/apcs-msm8916.c
> @@ -51,6 +51,19 @@ static int qcom_apcs_msm8916_clk_probe(struct platform_device *pdev)
>         struct clk_init_data init = { };
>         int ret = -ENODEV;
>  
> +       /*
> +        * This driver is defined by the devicetree binding
> +        * Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.txt,
> +        * however, this driver is registered as a platform device by
> +        * qcom-apcs-ipc-mailbox.c. Because of this, when this driver
> +        * uses dev_get_regmap() and devm_clk_get(), it has to send the parent
> +        * device as argument.
> +        * When registering with the clock framework, we cannot use this trick,
> +        * since the clock framework always looks at dev->of_node when it tries
> +        * to find parent clock names using clk_parent_data.
> +        */
> +       dev->of_node = parent->of_node;

This is odd. The clks could be registered with of_clk_hw_register() but
then we lose the device provider information. Maybe we should search up
one level to the parent node and if that has a DT node but the
clk controller device doesn't we should use that instead?

----8<-----
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index b68e200829f2..c8745c415c04 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -3669,7 +3669,7 @@ __clk_register(struct device *dev, struct device_node *np, struct clk_hw *hw)
 	if (dev && pm_runtime_enabled(dev))
 		core->rpm_enabled = true;
 	core->dev = dev;
-	core->of_node = np;
+	core->of_node = np ? : dev_of_node(dev->parent);
 	if (dev && dev->driver)
 		core->owner = dev->driver->owner;
 	core->hw = hw;

  reply	other threads:[~2019-12-19  6:23 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-25 13:59 [PATCH v3 0/7] Clock changes to support cpufreq on QCS404 Niklas Cassel
2019-11-25 13:59 ` [PATCH v3 2/7] clk: qcom: gcc: limit GPLL0_AO_OUT operating frequency Niklas Cassel
2019-12-19  6:24   ` Stephen Boyd
2019-11-25 13:59 ` [PATCH v3 3/7] clk: qcom: hfpll: register as clock provider Niklas Cassel
2019-12-19  6:24   ` Stephen Boyd
2019-11-25 13:59 ` [PATCH v3 4/7] clk: qcom: hfpll: CLK_IGNORE_UNUSED Niklas Cassel
2019-12-19  6:25   ` Stephen Boyd
2019-11-25 13:59 ` [PATCH v3 5/7] clk: qcom: hfpll: use clk_parent_data to specify the parent Niklas Cassel
2019-12-19  6:25   ` Stephen Boyd
2019-11-25 13:59 ` [PATCH v3 6/7] clk: qcom: apcs-msm8916: silently error out on EPROBE_DEFER Niklas Cassel
2019-12-19  6:25   ` Stephen Boyd
2019-11-25 13:59 ` [PATCH v3 7/7] clk: qcom: apcs-msm8916: use clk_parent_data to specify the parent Niklas Cassel
2019-12-19  6:23   ` Stephen Boyd [this message]
2019-12-20 17:22     ` Bjorn Andersson
2019-12-20 17:56     ` Niklas Cassel
2019-12-24  2:16       ` Stephen Boyd
2019-12-27  2:26         ` Bjorn Andersson
2019-12-30 18:04           ` Stephen Boyd
2020-01-03  7:47   ` Bjorn Andersson
2019-12-18 12:16 ` [PATCH v3 0/7] Clock changes to support cpufreq on QCS404 Niklas Cassel

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20191219062339.DC0DE21582@mail.kernel.org \
    --to=sboyd@kernel.org \
    --cc=agross@kernel.org \
    --cc=amit.kucheria@linaro.org \
    --cc=bjorn.andersson@linaro.org \
    --cc=linux-arm-msm@vger.kernel.org \
    --cc=linux-clk@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mturquette@baylibre.com \
    --cc=niklas.cassel@linaro.org \
    --subject='Re: [PATCH v3 7/7] clk: qcom: apcs-msm8916: use clk_parent_data to specify the parent' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).