From: Mark Brown <broonie@kernel.org>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Alexandre Courbot <gnurou@gmail.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Linus Walleij <linus.walleij@linaro.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
netdev <netdev@vger.kernel.org>,
linux-wireless <linux-wireless@vger.kernel.org>,
linux-sunxi <linux-sunxi@googlegroups.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Maxime Ripard <maxime.ripard@free-electrons.com>,
Chen-Yu Tsai <wens@csie.org>,
Johannes Berg <johannes@sipsolutions.net>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
"David S. Miller" <davem@davemloft.net>,
"linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>
Subject: Re: [PATCH RFC 4/6] net: rfkill: gpio: add device tree support
Date: Wed, 22 Jan 2014 12:38:19 +0000 [thread overview]
Message-ID: <20140122123819.GH17314@sirena.org.uk> (raw)
In-Reply-To: <201401211950.07011.arnd@arndb.de>
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On Tue, Jan 21, 2014 at 07:50:06PM +0100, Arnd Bergmann wrote:
> I should have another look at the debugfs representation, but isn't
> there a global namespace that gets used for all gpios? Neither the
> con_id nor the name that the driver picks would be globally unique
> and stable across kernel versions, so they don't make a good user
> interface.
Currently the globally unique name is the GPIO number but that's not
stable since it gets dynamically assigned.
> I think what we want here is a system-wide unique identifier for
> each gpio line that may get represented in debugfs, and use a new
> DT mechanism to communicate that.
We've mostly been using things based off dev_name() for stability.
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WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie@kernel.org>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Alexandre Courbot <gnurou@gmail.com>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
netdev <netdev@vger.kernel.org>,
Linus Walleij <linus.walleij@linaro.org>,
linux-wireless <linux-wireless@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
"David S. Miller" <davem@davemloft.net>,
"linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>,
linux-sunxi <linux-sunxi@googlegroups.com>,
Maxime Ripard <maxime.ripard@free-electrons.com>,
Chen-Yu Tsai <wens@csie.org>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Johannes Berg <johannes@sipsolutions.net>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH RFC 4/6] net: rfkill: gpio: add device tree support
Date: Wed, 22 Jan 2014 12:38:19 +0000 [thread overview]
Message-ID: <20140122123819.GH17314@sirena.org.uk> (raw)
In-Reply-To: <201401211950.07011.arnd@arndb.de>
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On Tue, Jan 21, 2014 at 07:50:06PM +0100, Arnd Bergmann wrote:
> I should have another look at the debugfs representation, but isn't
> there a global namespace that gets used for all gpios? Neither the
> con_id nor the name that the driver picks would be globally unique
> and stable across kernel versions, so they don't make a good user
> interface.
Currently the globally unique name is the GPIO number but that's not
stable since it gets dynamically assigned.
> I think what we want here is a system-wide unique identifier for
> each gpio line that may get represented in debugfs, and use a new
> DT mechanism to communicate that.
We've mostly been using things based off dev_name() for stability.
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WARNING: multiple messages have this Message-ID (diff)
From: broonie@kernel.org (Mark Brown)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH RFC 4/6] net: rfkill: gpio: add device tree support
Date: Wed, 22 Jan 2014 12:38:19 +0000 [thread overview]
Message-ID: <20140122123819.GH17314@sirena.org.uk> (raw)
In-Reply-To: <201401211950.07011.arnd@arndb.de>
On Tue, Jan 21, 2014 at 07:50:06PM +0100, Arnd Bergmann wrote:
> I should have another look at the debugfs representation, but isn't
> there a global namespace that gets used for all gpios? Neither the
> con_id nor the name that the driver picks would be globally unique
> and stable across kernel versions, so they don't make a good user
> interface.
Currently the globally unique name is the GPIO number but that's not
stable since it gets dynamically assigned.
> I think what we want here is a system-wide unique identifier for
> each gpio line that may get represented in debugfs, and use a new
> DT mechanism to communicate that.
We've mostly been using things based off dev_name() for stability.
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next prev parent reply other threads:[~2014-01-22 12:39 UTC|newest]
Thread overview: 89+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-17 6:47 [PATCH RFC 0/6] net: rfkill: gpio: Add device tree support Chen-Yu Tsai
2014-01-17 6:47 ` Chen-Yu Tsai
2014-01-17 6:47 ` Chen-Yu Tsai
2014-01-17 6:47 ` [PATCH RFC 1/6] net: rfkill: gpio: fix gpio name buffer size off by 1 Chen-Yu Tsai
2014-01-17 6:47 ` Chen-Yu Tsai
2014-01-17 6:47 ` Chen-Yu Tsai
2014-01-17 9:46 ` David Laight
2014-01-17 9:46 ` David Laight
2014-01-17 9:46 ` David Laight
2014-01-17 9:59 ` Chen-Yu Tsai
2014-01-17 9:59 ` Chen-Yu Tsai
2014-01-17 9:59 ` Chen-Yu Tsai
2014-01-17 9:59 ` Chen-Yu Tsai
2014-01-17 6:47 ` [PATCH RFC 2/6] net: rfkill: gpio: use clk_prepare_enable/clk_disable_unprepare Chen-Yu Tsai
2014-01-17 6:47 ` Chen-Yu Tsai
2014-01-17 6:47 ` Chen-Yu Tsai
2014-01-17 6:47 ` [PATCH RFC 3/6] net: rfkill: gpio: fix reversed clock enable state Chen-Yu Tsai
2014-01-17 6:47 ` Chen-Yu Tsai
2014-01-17 6:47 ` Chen-Yu Tsai
2014-01-17 6:47 ` [PATCH RFC 4/6] net: rfkill: gpio: add device tree support Chen-Yu Tsai
2014-01-17 6:47 ` Chen-Yu Tsai
2014-01-17 6:47 ` Chen-Yu Tsai
2014-01-17 16:47 ` Arnd Bergmann
2014-01-17 16:47 ` Arnd Bergmann
2014-01-17 16:47 ` Arnd Bergmann
2014-01-17 17:43 ` Chen-Yu Tsai
2014-01-17 17:43 ` Chen-Yu Tsai
2014-01-17 17:43 ` Chen-Yu Tsai
2014-01-17 20:13 ` Arnd Bergmann
2014-01-17 20:13 ` Arnd Bergmann
2014-01-17 20:13 ` Arnd Bergmann
2014-01-17 23:11 ` Linus Walleij
2014-01-17 23:11 ` Linus Walleij
2014-01-17 23:11 ` Linus Walleij
2014-01-18 4:41 ` Chen-Yu Tsai
2014-01-18 4:41 ` Chen-Yu Tsai
2014-01-18 4:41 ` Chen-Yu Tsai
2014-01-20 8:10 ` Heikki Krogerus
2014-01-20 8:10 ` Heikki Krogerus
2014-01-20 8:10 ` Heikki Krogerus
2014-01-21 3:11 ` Alexandre Courbot
2014-01-21 3:11 ` Alexandre Courbot
2014-01-21 9:35 ` Linus Walleij
2014-01-21 9:35 ` Linus Walleij
2014-01-21 9:35 ` Linus Walleij
2014-01-21 12:35 ` Arnd Bergmann
2014-01-21 12:35 ` Arnd Bergmann
2014-01-21 12:35 ` Arnd Bergmann
2014-01-21 14:53 ` Alexandre Courbot
2014-01-21 14:53 ` Alexandre Courbot
2014-01-21 14:53 ` Alexandre Courbot
2014-01-21 14:53 ` Alexandre Courbot
2014-01-21 15:25 ` Mika Westerberg
2014-01-21 15:25 ` Mika Westerberg
2014-01-21 15:25 ` Mika Westerberg
2014-01-21 18:50 ` Arnd Bergmann
2014-01-21 18:50 ` Arnd Bergmann
2014-01-21 18:50 ` Arnd Bergmann
2014-01-21 18:50 ` Arnd Bergmann
2014-01-22 12:38 ` Mark Brown [this message]
2014-01-22 12:38 ` Mark Brown
2014-01-22 12:38 ` Mark Brown
2014-01-22 12:38 ` Mark Brown
2014-01-22 9:54 ` Linus Walleij
2014-01-22 9:54 ` Linus Walleij
2014-01-22 9:54 ` Linus Walleij
2014-01-22 9:54 ` Linus Walleij
2014-01-22 9:58 ` Linus Walleij
2014-01-22 9:58 ` Linus Walleij
2014-01-22 9:58 ` Linus Walleij
2014-01-22 9:58 ` Linus Walleij
2014-01-22 11:00 ` Mika Westerberg
2014-01-22 11:00 ` Mika Westerberg
2014-01-22 11:00 ` Mika Westerberg
2014-01-22 11:00 ` Mika Westerberg
2014-01-27 14:24 ` Maxime Ripard
2014-01-27 14:24 ` Maxime Ripard
2014-01-27 14:24 ` Maxime Ripard
2014-01-29 4:01 ` [linux-sunxi] " Chen-Yu Tsai
2014-01-29 4:01 ` Chen-Yu Tsai
2014-01-29 4:01 ` Chen-Yu Tsai
2014-01-17 6:47 ` [PATCH RFC 5/6] net: rfkill: gpio: add clock-frequency device tree property Chen-Yu Tsai
2014-01-17 6:47 ` Chen-Yu Tsai
2014-01-17 6:47 ` Chen-Yu Tsai
2014-01-17 6:47 ` [PATCH RFC 6/6] ARM: sun7i: cubietruck: enable bluetooth module Chen-Yu Tsai
2014-01-17 6:47 ` Chen-Yu Tsai
2014-01-17 6:47 ` Chen-Yu Tsai
2014-01-17 20:26 ` [PATCH RFC 0/6] net: rfkill: gpio: Add device tree support Johannes Berg
2014-01-17 20:26 ` Johannes Berg
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