[alsa-devel] [PATCH 5/5] ASoC: amd: ACP powergating should be done by controller

[Dan Carpenter]

On Fri, Sep 27, 2019 at 04:37:39AM +0530, Ravulapati Vishnu vardhan rao wrote:
> +static int acp3x_power_on(void __iomem *acp3x_base)
> +{
> +	u32 val;
> +	u32 timeout = 0;
> +	int ret = 0;
> +
> +	val = rv_readl(acp3x_base + mmACP_PGFSM_STATUS);
> +	if (val) {

Flip this around.

	if (!val)
		return 0;

> +		if (!((val & ACP_PGFSM_STATUS_MASK) ==
> +				ACP_POWER_ON_IN_PROGRESS))

Use != insead of !(foo == bar).

	if ((val & ACP_PGFSM_STATUS_MASK) != ACP_POWER_ON_IN_PROGRESS)

> +			rv_writel(ACP_PGFSM_CNTL_POWER_ON_MASK,
> +				acp3x_base + mmACP_PGFSM_CONTROL);
> +		while (true) {
> +			val  = rv_readl(acp3x_base + mmACP_PGFSM_STATUS);
> +			if (!val)
> +				break;

return 0;



> +			udelay(1);
> +			if (timeout > 500) {

if (timeout++ > 500) {


> +				pr_err("ACP is Not Powered ON\n");

We print two error messages.  :/


> +				ret = -ETIMEDOUT;

return -ETIMOUT;

> +				break;
> +			}
> +			timeout++;
> +		}
> +		if (ret) {
> +			pr_err("ACP is not powered on status:%d\n", ret);
> +			return ret;
> +		}
> +	}
> +	return ret;
> +}

regards,
dan carpenter