Bartosz Golaszewski <bgolaszewski at baylibre.com> writes:
> Create a new driver for the da8xx DDR2/mDDR controller and implement
> support for writing to the Peripheral Bus Burst Priority Register.
>
> Signed-off-by: Bartosz Golaszewski <bgolaszewski at baylibre.com>
[...]
> + for (; setting->name; setting++) {
> + knob = da8xx_ddrctl_match_knob(setting);
> + if (!knob) {
> + dev_warn(dev,
> + "no such config option: %s\n", setting->name);
> + continue;
> + }
> +
> + if (knob->reg > (res->end - res->start - sizeof(u32))) {
Why the "- sizeof(u32)"? Shouldn't this just be resource_size(res)?
(c.f. linux/ioport.h)
> + dev_warn(dev,
> + "register offset of '%s' exceeds mapped memory
> size\n",
> + knob->name);
> + continue;
> + }
> +
> + reg = __raw_readl(ddrctl + knob->reg);
> + reg &= knob->mask;
> + reg |= setting->val << knob->shift;
> +
> + dev_dbg(dev, "writing 0x%08x to %s\n", reg, setting->name);
> +
> + __raw_writel(reg, ddrctl + knob->reg);
Can you use the normal readl/writel here? Or explain why the raw ones
are needed?
> + }
> +
> + return 0;
> +}
> +
Otherwise, looks good to me. With the changes above, feel free to add
Reviewed-by: Kevin Hilman <khilman at baylibre.com>
Kevin
