On Fri 01 Dec 09:02 PST 2017, Georgi Djakov wrote:
[..]
> diff --git a/drivers/clk/qcom/apcs-msm8916.c b/drivers/clk/qcom/apcs-msm8916.c
> new file mode 100644
> index 000000000000..f71039ff2347
> --- /dev/null
> +++ b/drivers/clk/qcom/apcs-msm8916.c
> @@ -0,0 +1,149 @@
> +/*
> + * Qualcomm APCS clock controller driver
> + *
> + * Copyright (c) 2017, Linaro Limited
> + * Author: Georgi Djakov <georgi.djakov@xxxxxxxxxx>
> + *
> + * SPDX-License-Identifier: GPL-2.0
The SPDX-License-Identifier should be on the first line in the file,
commented by //
> + */
> +
[..]
> +static int qcom_apcs_msm8916_clk_probe(struct platform_device *pdev)
> +{
> + struct device *dev = pdev->dev.parent;
Call this "parent" instead.
> + struct device_node *np = dev->of_node;
> + struct clk_regmap_mux_div *a53cc;
> + struct regmap *regmap;
> + struct clk_init_data init = { };
> + int ret;
> +
> + regmap = dev_get_regmap(dev, NULL);
> + if (IS_ERR(regmap)) {
> + ret = PTR_ERR(regmap);
> + dev_err(dev, "failed to get regmap: %d\n", ret);
dev_* prints should be on &pdev->dev and not on parent device.
> + return ret;
> + }
> +
> + a53cc = devm_kzalloc(dev, sizeof(*a53cc), GFP_KERNEL);
Perform this allocation on behalf of this device (i.e. &pdev->dev and
not parent)
> + if (!a53cc)
> + return -ENOMEM;
> +
> + init.name = "a53mux";
> + init.parent_names = gpll0_a53cc;
> + init.num_parents = ARRAY_SIZE(gpll0_a53cc);
> + init.ops = &clk_regmap_mux_div_ops;
> + init.flags = CLK_SET_RATE_PARENT;
> +
> + a53cc->clkr.hw.init = &init;
> + a53cc->clkr.regmap = regmap;
> + a53cc->reg_offset = 0x50;
> + a53cc->hid_width = 5;
> + a53cc->hid_shift = 0;
> + a53cc->src_width = 3;
> + a53cc->src_shift = 8;
> + a53cc->parent_map = gpll0_a53cc_map;
> +
> + a53cc->pclk = devm_clk_get(dev, NULL);
> + if (IS_ERR(a53cc->pclk)) {
> + ret = PTR_ERR(a53cc->pclk);
> + dev_err(dev, "failed to get clk: %d\n", ret);
> + return ret;
> + }
> +
> + a53cc->clk_nb.notifier_call = a53cc_notifier_cb;
> + ret = clk_notifier_register(a53cc->pclk, &a53cc->clk_nb);
> + if (ret) {
> + dev_err(dev, "failed to register clock notifier: %d\n", ret);
> + return ret;
> + }
> +
> + ret = devm_clk_register_regmap(dev, &a53cc->clkr);
This you can do on the &pdev->dev, it won't find a regmap on this node
and will try the parent.
> + if (ret) {
> + dev_err(dev, "failed to register regmap clock: %d\n", ret);
> + goto err;
> + }
> +
> + ret = of_clk_add_hw_provider(np, of_clk_hw_simple_get,
Be explicit here and do parent->of_node.
> + &a53cc->clkr.hw);
> + if (ret) {
> + dev_err(dev, "failed to add clock provider: %d\n", ret);
> + goto err;
> + }
> +
> + platform_set_drvdata(pdev, a53cc);
> +
> + return 0;
> +
> +err:
> + clk_notifier_unregister(a53cc->pclk, &a53cc->clk_nb);
> + return ret;
> +}
> +
> +static int qcom_apcs_msm8916_clk_remove(struct platform_device *pdev)
> +{
> + struct clk_regmap_mux_div *a53cc = platform_get_drvdata(pdev);
> +
> + clk_notifier_unregister(a53cc->pclk, &a53cc->clk_nb);
> + of_clk_del_provider(pdev->dev.of_node);
You registered the provider on pdev->dev->parent.of_node.
> +
> + return 0;
> +}
> +
Regards,
Bjorn
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