From: Mathias Nyman <mathias.nyman@linux.intel.com>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>,
linux-kernel@vger.kernel.org, lenb@kernel.org,
rafael.j.wysocki@intel.com, broonie@opensource.wolfsonmicro.com,
grant.likely@secretlab.ca, khali@linux-fr.org,
ben-linux@fluff.org, w.sang@pengutronix.de,
linux-acpi@vger.kernel.org
Subject: Re: [PATCH 1/3] gpio / ACPI: add ACPI support
Date: Mon, 05 Nov 2012 14:14:21 +0200 [thread overview]
Message-ID: <5097AD9D.7060808@linux.intel.com> (raw)
In-Reply-To: <CACRpkdYGbNCzV7QOURcEzhrNWv=kbWq+r3i66GtC75Aytso5rw@mail.gmail.com>
On 11/05/2012 01:53 PM, Linus Walleij wrote:
> On Sat, Nov 3, 2012 at 8:46 AM, Mika Westerberg
> <mika.westerberg@linux.intel.com> wrote:
>
>> +/**
>> + * acpi_get_gpio() - Translate ACPI GPIO pin to GPIO number usable with GPIO API
>> + * @path: ACPI GPIO controller full path name, (e.g. "\\_SB.GPO1")
>> + * @pin: ACPI GPIO pin number (0-based, controller-relative)
>> + *
>> + * Returns GPIO number to use with Linux generic GPIO API, or errno error value
>> + */
>
> So by just looking at that we can see that this is yet another
> instance of papering
> over the fact that the Linux GPIO numbers are global to the kernel and not
> per-chip, as would be preferred.
Yes, it is. ACPI5 GPIO resources are numbered per-chip. This is just a
way for device drivers to find the corresponding Linux GPIO.
per-chip based numbering sounds saner, but this deals with what we
currently have.
>
> Can you please contribute to the parallel discussion on how to get rid of
> the global GPIO numberspace, thread named:
> "How about a gpio_get(device *, char *) function?"
I'll take a look at it, (and see if I got anything of value to add)
-Mathias
next prev parent reply other threads:[~2012-11-05 12:11 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-03 7:46 [PATCH 0/3] ACPI 5 support for GPIO, SPI and I2C Mika Westerberg
2012-11-03 7:46 ` [PATCH 1/3] gpio / ACPI: add ACPI support Mika Westerberg
2012-11-05 11:53 ` Linus Walleij
2012-11-05 12:14 ` Mathias Nyman [this message]
2012-11-05 12:46 ` Rafael J. Wysocki
2012-11-05 13:11 ` Linus Walleij
2012-11-05 13:19 ` Rafael J. Wysocki
2012-11-05 13:28 ` Linus Walleij
2012-11-05 13:50 ` Rafael J. Wysocki
2012-11-05 14:40 ` Linus Walleij
2012-11-06 9:39 ` Mika Westerberg
2012-11-06 10:15 ` Linus Walleij
2012-11-07 8:54 ` Mika Westerberg
2012-11-08 15:55 ` Grant Likely
2012-11-08 19:38 ` Mika Westerberg
2012-11-09 14:11 ` Mathias Nyman
2012-11-09 14:18 ` Grant Likely
2012-11-09 15:05 ` Mathias Nyman
2012-11-09 15:46 ` Grant Likely
2012-11-11 9:50 ` Mika Westerberg
2012-11-03 7:46 ` [PATCH 2/3] spi / ACPI: add ACPI enumeration support Mika Westerberg
2012-11-03 19:42 ` Bjorn Helgaas
2012-11-03 20:13 ` Mika Westerberg
2012-11-03 20:59 ` Rafael J. Wysocki
2012-11-05 10:31 ` Rafael J. Wysocki
2012-11-05 10:56 ` Mika Westerberg
2012-11-05 10:56 ` Mark Brown
2012-11-05 12:02 ` Mika Westerberg
2012-11-05 12:23 ` Jean Delvare
2012-11-05 12:59 ` Rafael J. Wysocki
2012-11-05 13:15 ` Mika Westerberg
2012-11-05 13:20 ` Linus Walleij
2012-11-05 13:43 ` Mika Westerberg
2012-11-05 14:03 ` Jean Delvare
2012-11-05 14:19 ` Rafael J. Wysocki
2012-11-05 14:53 ` Mika Westerberg
2012-11-05 15:19 ` Jean Delvare
2012-11-05 17:12 ` Mika Westerberg
2012-11-05 17:43 ` Bjorn Helgaas
2012-11-05 18:08 ` Mika Westerberg
2012-11-05 17:49 ` Jean Delvare
2012-11-05 20:42 ` Linus Walleij
2012-11-06 8:11 ` Mark Brown
2012-11-05 16:54 ` Bjorn Helgaas
2012-11-06 13:43 ` Rafael J. Wysocki
2012-11-06 20:35 ` Bjorn Helgaas
2012-11-06 22:28 ` Rafael J. Wysocki
2012-11-06 22:36 ` Rafael J. Wysocki
2012-11-07 9:58 ` Mika Westerberg
2012-11-07 11:14 ` Rafael J. Wysocki
2012-11-07 13:05 ` Mika Westerberg
2012-11-08 0:46 ` Rafael J. Wysocki
2012-11-08 20:20 ` Mika Westerberg
2012-11-08 20:54 ` Rafael J. Wysocki
2012-11-08 18:05 ` Grant Likely
2012-11-08 21:06 ` Rafael J. Wysocki
2012-11-08 21:34 ` Grant Likely
2012-11-05 10:54 ` Mark Brown
2012-11-03 20:39 ` Rafael J. Wysocki
2012-11-05 16:54 ` Bjorn Helgaas
2012-11-06 13:16 ` Rafael J. Wysocki
2012-11-06 20:53 ` Bjorn Helgaas
2012-11-06 22:18 ` Rafael J. Wysocki
2012-11-07 9:56 ` Mika Westerberg
2012-11-08 19:32 ` Bjorn Helgaas
2012-11-08 20:04 ` Mika Westerberg
2012-11-09 15:11 ` Bjorn Helgaas
2012-11-09 15:45 ` Grant Likely
2012-11-09 16:35 ` Bjorn Helgaas
2012-11-09 16:43 ` Grant Likely
2012-11-09 16:48 ` Mark Brown
2012-11-09 16:53 ` Bjorn Helgaas
2012-11-10 11:10 ` Rafael J. Wysocki
2012-11-10 11:16 ` Grant Likely
2012-11-10 17:14 ` Bjorn Helgaas
2012-11-10 19:40 ` Rafael J. Wysocki
2012-11-05 10:54 ` Mark Brown
2012-11-05 11:03 ` Mika Westerberg
2012-11-05 11:13 ` Mark Brown
2012-11-08 18:48 ` Grant Likely
2012-11-09 3:50 ` Mika Westerberg
2012-11-03 7:46 ` [PATCH 3/3] i2c " Mika Westerberg
2012-11-03 21:52 ` Jean Delvare
2012-11-04 7:23 ` Mika Westerberg
2012-11-04 8:50 ` Jean Delvare
2012-11-04 10:50 ` Mika Westerberg
2012-11-08 18:58 ` Grant Likely
2012-11-09 3:51 ` Mika Westerberg
2012-11-04 18:29 ` [PATCH 0/3] ACPI 5 support for GPIO, SPI and I2C Linus Walleij
2012-11-05 9:23 ` Mika Westerberg
2012-11-12 11:51 ` [PATCH 0/3] Centralized parsing of ACPI device resources (was: Re: [PATCH 0/3] ACPI 5 support for GPIO, SPI and I2C) Rafael J. Wysocki
2012-11-12 12:00 ` [PATCH 1/3] ACPI: Move device resources interpretation code from PNP to ACPI core Rafael J. Wysocki
2012-11-12 13:27 ` Mika Westerberg
2012-11-12 20:25 ` [Update][PATCH " Rafael J. Wysocki
2012-11-12 12:01 ` [PATCH 2/3] ACPI / platform: Use common ACPI device resource parsing routines Rafael J. Wysocki
2012-11-12 12:02 ` [PATCH 3/3] ACPI: Evaluate _CRS while creating device node objects Rafael J. Wysocki
2012-11-12 14:46 ` Mika Westerberg
2012-11-12 21:03 ` Rafael J. Wysocki
2012-11-13 7:12 ` Mika Westerberg
2012-11-13 12:06 ` [Replacement][PATCH 3/3] Rafael J. Wysocki
2012-11-13 14:16 ` Mika Westerberg
2012-11-13 15:15 ` Rafael J. Wysocki
2012-11-13 15:18 ` Mika Westerberg
2012-11-13 15:28 ` Rafael J. Wysocki
2012-11-13 15:37 ` Mika Westerberg
2012-11-13 16:34 ` [PATCH 3/3] ACPI: Evaluate _CRS while creating device node objects Moore, Robert
2012-11-13 20:44 ` Rafael J. Wysocki
2012-11-13 22:06 ` Moore, Robert
2012-11-13 22:56 ` Rafael J. Wysocki
2012-11-14 2:23 ` Moore, Robert
2012-11-14 9:18 ` Rafael J. Wysocki
2012-11-14 9:32 ` Rafael J. Wysocki
2012-11-14 14:20 ` Moore, Robert
2012-11-13 20:51 ` [PATCH 0/3 rev 2] Centralized parsing of ACPI device resources Rafael J. Wysocki
2012-11-13 20:55 ` [PATCH 1/3 rev 2] ACPI: Move device resources interpretation code from PNP to ACPI core Rafael J. Wysocki
2012-11-13 20:55 ` [PATCH 2/3 rev 2] ACPI / platform: Use common ACPI device resource parsing routines Rafael J. Wysocki
2012-11-13 20:56 ` [PATCH 3/3 rev 2] ACPI: Centralized processing of ACPI device resources Rafael J. Wysocki
2012-11-14 9:52 ` [PATCH 0/3 rev 2] Centralized parsing " Mika Westerberg
2012-11-14 10:08 ` Rafael J. Wysocki
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