linux-kernel - Re: [PATCH 2/7] clk: qcom: add the GPUCC driver for sa8775p

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Date:   Wed, 29 Mar 2023 13:30:49 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Bartosz Golaszewski <brgl@...ev.pl>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, iommu@...ts.linux.dev,
        Shazad Hussain <quic_shazhuss@...cinc.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH 2/7] clk: qcom: add the GPUCC driver for sa8775p



On 28.03.2023 21:36, Bartosz Golaszewski wrote:
> From: Shazad Hussain <quic_shazhuss@...cinc.com>
> 
> Add the clock driver for the Qualcomm Graphics Clock control module.
> 
> Cc: Stephen Boyd <sboyd@...nel.org>
> Cc: Michael Turquette <mturquette@...libre.com>
> Signed-off-by: Shazad Hussain <quic_shazhuss@...cinc.com>
> [Bartosz: make ready for upstream]
> Co-authored-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> ---
[...]

> +/* Need to match the order of clocks in DT binding */
> +enum {
> +	DT_IFACE,
I think it's never used?

[...]

> +static int gpu_cc_sa8775p_probe(struct platform_device *pdev)
> +{
> +	struct regmap *regmap;
> +
> +	regmap = qcom_cc_map(pdev, &gpu_cc_sa8775p_desc);
> +	if (IS_ERR(regmap))
> +		return PTR_ERR(regmap);
> +
> +	clk_lucid_evo_pll_configure(&gpu_cc_pll0, regmap, &gpu_cc_pll0_config);
> +	clk_lucid_evo_pll_configure(&gpu_cc_pll1, regmap, &gpu_cc_pll1_config);
> +
> +	/*
> +	 * Keep the clocks always-ON
> +	 * GPU_CC_CB_CLK
> +	 */
> +	regmap_update_bits(regmap, 0x93a4, BIT(0), BIT(0));
You set it as CRITICAL, this should be unnecessary now.

Konrad
> +
> +	return qcom_cc_really_probe(pdev, &gpu_cc_sa8775p_desc, regmap);
> +}
> +
> +static struct platform_driver gpu_cc_sa8775p_driver = {
> +	.probe = gpu_cc_sa8775p_probe,
> +	.driver = {
> +		.name = "gpu_cc-sa8775p",
> +		.of_match_table = gpu_cc_sa8775p_match_table,
> +	},
> +};
> +
> +static int __init gpu_cc_sa8775p_init(void)
> +{
> +	return platform_driver_register(&gpu_cc_sa8775p_driver);
> +}
> +subsys_initcall(gpu_cc_sa8775p_init);
> +
> +static void __exit gpu_cc_sa8775p_exit(void)
> +{
> +	platform_driver_unregister(&gpu_cc_sa8775p_driver);
> +}
> +module_exit(gpu_cc_sa8775p_exit);
> +
> +MODULE_DESCRIPTION("SA8775P GPUCC driver");
> +MODULE_LICENSE("GPL");