[PATCH 04/11] soc: imx: gpcv2: wait for ADB400 handshake

[Marek Vasut]

On 9/30/20 5:49 PM, Lucas Stach wrote:

[...]

> @@ -176,9 +180,19 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd)
>  			   GPC_PGC_CTRL_PCR, 0);
>  
>  	/* request the ADB400 to power up */
> -	if (domain->bits.hsk)
> +	if (domain->bits.hskreq) {
>  		regmap_update_bits(domain->regmap, GPC_PU_PWRHSK,
> -				   domain->bits.hsk, domain->bits.hsk);
> +				   domain->bits.hskreq, domain->bits.hskreq);
> +
> +		ret = regmap_read_poll_timeout(domain->regmap, GPC_PU_PWRHSK,
> +					       reg_val,
> +					       (reg_val & domain->bits.hskack),
> +					       0, USEC_PER_MSEC);
> +		if (ret) {
> +			dev_err(domain->dev, "failed to power up ADB400\n");

The ADB400 is a bus bridge, so the bus is being attached here, not
powered up, right ?