Hi Mathieu,

thanks for taking the time to look into this!

(I will address any of your comments that I am not mentioning in this
email anymore. Thanks a lot for the suggestions!)

On Wed, Jul 28, 2021 at 7:58 PM Mathieu Poirier
[off-list ref] wrote:
[...]

quoted

+     writel(FIELD_PREP(AO_REMAP_REG0_REMAP_AHB_SRAM_BITS_17_14_FOR_ARM_CPU,
+                            priv->sram_pa >> 14),

Indentation problem

The idea here is to align priv->sram_pa with AO_REMAP_REG0... which
are both arguments to FIELD_PREP
Maybe using something like this will make that easier to read:
    tmp = FIELD_PREP(AO_REMAP_REG0_REMAP_AHB_SRAM_BITS_17_14_FOR_ARM_CPU,
                                     priv->sram_pa >> 14);
    writel(tmp, priv->remap_base + AO_REMAP_REG0);

What do you think: leave it as is or use a separate variable?

[...]

quoted

+     usleep_range(10, 100);

I've seen this kind of mysterious timeouts in other patchset based vendor trees.
You likely don't know why it is needed so I won't ask.

unfortunately this is also the case here

[...]

quoted

+     priv->arc_reset = devm_reset_control_get_exclusive(dev, NULL);
+     if (IS_ERR(priv->arc_reset)) {

Function __reset_control_get() in __devm_reset_control_get() can return NULL so
this should be IS_ERR_OR_NULL().

The logic in there is: return optional ? NULL : ERR_PTR(-...);
I am requesting a mandatory reset line here, so reset core will never
return NULL
See also [0]

For this reason I am not planning to change this

[...]

This driver is squeaky clean. With the above:

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>

awesome, thank you!


Best regards,
Martin


[0] https://elixir.bootlin.com/linux/v5.14-rc4/source/include/linux/reset.h#L227

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