On Mon, Jun 11 2018, Sergio Paracuellos wrote: > After submiting this driver to try to get mainlined and get > out of staging some new cleanups seems to be necessary. > According to this main of Linus Walleij: > > http://driverdev.linuxdriverproject.org/pipermail/driverdev-devel/2018-June/121742.html > > this series tries to fix all of the issues in order to send > v2 and give it a new try. Because I don't have to hardware to > test my changes I send new cleanups first in staging to make > easier to NeilBrown test it and get a feedback about them. > > Changes in v3: > - PATCH 7: refactor irq_type to make better code. > - Add PATCH 8 avoiding the use of custom domain and requesting > manually a 'IRQF_SHARED'. It should be working now??
Yes, it is working now - thanks.
With this series, the driver again works for all the tests I can
perform - except that some names aren't unique, as I've mentioned
separately.
Looking over the new code:
- I don't think we need PIN_MASK() any more. We needed that
when we had 1 irq_chip which handled 96 irqs. Now we have
3 irq_chips with 32 irqs each.
- documentation for 'struct mtk_data' says it is a single
irqchip, but I don't think it is any more - there is one
per gpio chip.
Related: doco for 'struct mtk_gc' contains data for both
the gpio_chip and the irq_chip. I don't know if that
needs to be spelled out.
- In
if (pending) {
for_each_set_bit(bit, &pending, MTK_BANK_WIDTH) {
I wouldn't bother with the "if (pending)".
If pending is zero, then find_each_set_bit() won't find anything.
It is at most a minor optimization.
This is a personal preference and if you like it that way, leave it.
Though if you are keen to optimize, then instead of calling
mtk_gpio_w32(...BIT(bit)) for every found bit, just call
mtk_gpio_w32(... pending) once at the top.
- to_mediatek_gpio() cannot return NULL, so testing "if (!rg)" in
several places is pointless.
- If the dts file doesn't specify an irq, the irq_of_parse_and_map()
will return -1 (I think). This might deserve a warning and probably
shouldn't cause the probe to fail, but it should cause
mediatek_gpio_bank_probe to avoid trying to set up interrupts.
Nothing serious, but some might be worth fixing.
Thanks a lot,
NeilBrown
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