static int hibvt_pwm_probe()

in pwm-hibvt.c [188:243]

• 45 lines of code
• 8 McCabe index (conditional complexity)

static int hibvt_pwm_probe(struct platform_device *pdev)
{
	const struct hibvt_pwm_soc *soc =
				of_device_get_match_data(&pdev->dev);
	struct hibvt_pwm_chip *pwm_chip;
	int ret, i;

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

	pwm_chip->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(pwm_chip->clk)) {
		dev_err(&pdev->dev, "getting clock failed with %ld\n",
				PTR_ERR(pwm_chip->clk));
		return PTR_ERR(pwm_chip->clk);
	}

	pwm_chip->chip.ops = &hibvt_pwm_ops;
	pwm_chip->chip.dev = &pdev->dev;
	pwm_chip->chip.npwm = soc->num_pwms;
	pwm_chip->soc = soc;

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

	ret = clk_prepare_enable(pwm_chip->clk);
	if (ret < 0)
		return ret;

	pwm_chip->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
	if (IS_ERR(pwm_chip->rstc)) {
		clk_disable_unprepare(pwm_chip->clk);
		return PTR_ERR(pwm_chip->rstc);
	}

	reset_control_assert(pwm_chip->rstc);
	msleep(30);
	reset_control_deassert(pwm_chip->rstc);

	ret = pwmchip_add(&pwm_chip->chip);
	if (ret < 0) {
		clk_disable_unprepare(pwm_chip->clk);
		return ret;
	}

	for (i = 0; i < pwm_chip->chip.npwm; i++) {
		hibvt_pwm_set_bits(pwm_chip->base, PWM_CTRL_ADDR(i),
				PWM_KEEP_MASK, (0x1 << PWM_KEEP_SHIFT));
	}

	platform_set_drvdata(pdev, pwm_chip);

	return 0;
}