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Message-ID: <Ya42ZAKupwKiWpJf@builder.lan>
Date: Mon, 6 Dec 2021 10:12:20 -0600
From: Bjorn Andersson <bjorn.andersson@...aro.org>
To: Bartosz Dudziak <bartosz.dudziak@...jp.pl>
Cc: Andy Gross <agross@...nel.org>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Jeffrey Hugo <jhugo@...eaurora.org>,
Taniya Das <tdas@...eaurora.org>,
linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
~postmarketos/upstreaming@...ts.sr.ht
Subject: Re: [PATCH 2/2] clk: qcom: Add MSM8226 Multimedia Clock Controller
support
On Fri 12 Nov 19:58 CST 2021, Bartosz Dudziak wrote:
> diff --git a/drivers/clk/qcom/mmcc-msm8974.c b/drivers/clk/qcom/mmcc-msm8974.c
[..]
> static int mmcc_msm8974_probe(struct platform_device *pdev)
> {
> struct regmap *regmap;
> + const struct of_device_id *match;
> +
> + match = of_match_device(mmcc_msm8974_match_table, &pdev->dev);
Could you please use of_device_get_match_data() instead?
> + if (!match)
As a general suggestion; I don't see how we would end up here with
!match, but if we somehow do it would be during development and you
would have an easier time debugging this by hitting a NULL pointer
dereference with a callstack, than tracking down why your clocks are
missing...
Thanks,
Bjorn
> + return -ENODEV;
>
> - regmap = qcom_cc_map(pdev, &mmcc_msm8974_desc);
> + regmap = qcom_cc_map(pdev, match->data);
> if (IS_ERR(regmap))
> return PTR_ERR(regmap);
>
> - clk_pll_configure_sr_hpm_lp(&mmpll1, regmap, &mmpll1_config, true);
> - clk_pll_configure_sr_hpm_lp(&mmpll3, regmap, &mmpll3_config, false);
> + if (match->data == &mmcc_msm8974_desc) {
> + clk_pll_configure_sr_hpm_lp(&mmpll1, regmap, &mmpll1_config, true);
> + clk_pll_configure_sr_hpm_lp(&mmpll3, regmap, &mmpll3_config, false);
> + } else {
> + msm8226_clock_override();
> + }
>
> - return qcom_cc_really_probe(pdev, &mmcc_msm8974_desc, regmap);
> + return qcom_cc_really_probe(pdev, match->data, regmap);
> }
>
> static struct platform_driver mmcc_msm8974_driver = {
> --
> 2.25.1
>
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