From: Sascha Hauer <s.hauer@pengutronix.de>
To: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH] gpio: Add designware gpio controller support
Date: Tue, 10 Sep 2013 09:48:16 +0200 [thread overview]
Message-ID: <20130910074816.GE30088@pengutronix.de> (raw)
In-Reply-To: <522DF740.9050503@gmail.com>
On Mon, Sep 09, 2013 at 06:28:48PM +0200, Sebastian Hesselbarth wrote:
> I have seen this driver and think it can be improved by exploiting
> its config1/2 registers where synthesis settings are stored. Please
> also look at [1] pp.1229; you can read out number of ports, port
> width, interrupt, and debounce features.
Ok, the port width feature is easy enough to implement. Will add it in
the next version.
I also added a check for multiple ports, but just ignore the additional
ports for now since I don't know the register offsets and also have no
hardware to actually test it (The SoCFPGA only has one port)
>
> Unfortunately, I am not ready to run barebox on Armada 1500 and I
> don't have a socfpga to test. So if you are not eager to modify it now,
> I can add config reg based read-out later.
>
> [1] http://www.altera.com/literature/hb/arria-v/hps.pdf
>
> [...]
> >+static __maybe_unused struct of_device_id dwgpio_match[] = {
> >+ {
> >+ .compatible = "snps,dw-gpio",
> >+ }, {
>
> Please add "snps,dw-apb-gpio", that's what the linux driver
> will look for if make to pick it up for Armada 1500.
I'll better just change it to "snps,dw-apb-gpio". There already is a
dtsi file in the kernel which uses this binding (although it looks like
it hasn't been approved by anyone)
Sascha
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next prev parent reply other threads:[~2013-09-10 7:48 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-09 14:54 Sascha Hauer
2013-09-09 16:28 ` Sebastian Hesselbarth
2013-09-10 7:48 ` Sascha Hauer [this message]
2013-09-10 8:56 ` Sebastian Hesselbarth
2013-09-11 6:35 ` Sascha Hauer
2013-10-17 8:04 ` Steffen Trumtrar
2013-10-17 8:24 ` Sebastian Hesselbarth
2013-10-17 8:38 ` Steffen Trumtrar
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