static int fsl_pwm_probe()

in pwm-fsl-ftm.c [399:465]

• 48 lines of code
• 10 McCabe index (conditional complexity)

static int fsl_pwm_probe(struct platform_device *pdev)
{
	struct fsl_pwm_chip *fpc;
	void __iomem *base;
	int ret;

	fpc = devm_kzalloc(&pdev->dev, sizeof(*fpc), GFP_KERNEL);
	if (!fpc)
		return -ENOMEM;

	mutex_init(&fpc->lock);

	fpc->soc = of_device_get_match_data(&pdev->dev);
	fpc->chip.dev = &pdev->dev;

	base = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(base))
		return PTR_ERR(base);

	fpc->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "ftm_sys", base,
						&fsl_pwm_regmap_config);
	if (IS_ERR(fpc->regmap)) {
		dev_err(&pdev->dev, "regmap init failed\n");
		return PTR_ERR(fpc->regmap);
	}

	fpc->clk[FSL_PWM_CLK_SYS] = devm_clk_get(&pdev->dev, "ftm_sys");
	if (IS_ERR(fpc->clk[FSL_PWM_CLK_SYS])) {
		dev_err(&pdev->dev, "failed to get \"ftm_sys\" clock\n");
		return PTR_ERR(fpc->clk[FSL_PWM_CLK_SYS]);
	}

	fpc->clk[FSL_PWM_CLK_FIX] = devm_clk_get(fpc->chip.dev, "ftm_fix");
	if (IS_ERR(fpc->clk[FSL_PWM_CLK_FIX]))
		return PTR_ERR(fpc->clk[FSL_PWM_CLK_FIX]);

	fpc->clk[FSL_PWM_CLK_EXT] = devm_clk_get(fpc->chip.dev, "ftm_ext");
	if (IS_ERR(fpc->clk[FSL_PWM_CLK_EXT]))
		return PTR_ERR(fpc->clk[FSL_PWM_CLK_EXT]);

	fpc->clk[FSL_PWM_CLK_CNTEN] =
				devm_clk_get(fpc->chip.dev, "ftm_cnt_clk_en");
	if (IS_ERR(fpc->clk[FSL_PWM_CLK_CNTEN]))
		return PTR_ERR(fpc->clk[FSL_PWM_CLK_CNTEN]);

	/*
	 * ipg_clk is the interface clock for the IP. If not provided, use the
	 * ftm_sys clock as the default.
	 */
	fpc->ipg_clk = devm_clk_get(&pdev->dev, "ipg");
	if (IS_ERR(fpc->ipg_clk))
		fpc->ipg_clk = fpc->clk[FSL_PWM_CLK_SYS];


	fpc->chip.ops = &fsl_pwm_ops;
	fpc->chip.npwm = 8;

	ret = devm_pwmchip_add(&pdev->dev, &fpc->chip);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to add PWM chip: %d\n", ret);
		return ret;
	}

	platform_set_drvdata(pdev, fpc);

	return fsl_pwm_init(fpc);
}