Re: [PATCH v2 3/3] i2c: mpc: implement erratum A-004447 workaround

[Andy Shevchenko]

On Fri, May 7, 2021 at 3:40 AM Chris Packham
<chris.packham@xxxxxxxxxxxxxxxxxxx> wrote:
>
> The P2040/P2041 has an erratum where the normal i2c recovery mechanism
> does not work. Implement the alternative recovery mechanism documented
> in the P2040 Chip Errata Rev Q.

Thanks.

> +static int i2c_mpc_wait_sr(struct mpc_i2c *i2c, int mask)
> +{
> +       int ret;
> +       u8 val;
> +
> +       ret = readb_poll_timeout(i2c->base + MPC_I2C_SR, val,
> +                                val & mask, 0, 100);
> +
> +       return ret;
> +}

So, now you may shrink it even further, i.e.

       void __iomem *sr = i2c->base + MPC_I2C_SR;
       u8 val;

       return readb_poll_timeout(sr, val, val & mask, 0, 100);

-- 
With Best Regards,
Andy Shevchenko