LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Samuel Ortiz <sameo@linux.intel.com>
To: Grant Likely <grant.likely@secretlab.ca>
Cc: Andres Salomon <dilinger@queued.net>,
	linux-kernel@vger.kernel.org,
	Mark Brown <broonie@opensource.wolfsonmicro.com>,
	khali@linux-fr.org, ben-linux@fluff.org,
	Peter Korsgaard <jacmet@sunsite.dk>,
	Mauro Carvalho Chehab <mchehab@infradead.org>,
	David Brownell <dbrownell@users.sourceforge.net>,
	linux-i2c@vger.kernel.org, linux-media@vger.kernel.org,
	netdev@vger.kernel.org, spi-devel-general@lists.sourceforge.net,
	Mocean Laboratories <info@mocean-labs.com>,
	Greg Kroah-Hartman <gregkh@suse.de>
Subject: Re: [PATCH 07/19] timberdale: mfd_cell is now implicitly available to drivers
Date: Wed, 6 Apr 2011 17:23:23 +0200	[thread overview]
Message-ID: <20110406152322.GA2757@sortiz-mobl> (raw)
In-Reply-To: <20110405030428.GB29522@ponder.secretlab.ca>

On Mon, Apr 04, 2011 at 09:04:29PM -0600, Grant Likely wrote:
> > The second step would be to get rid of mfd_get_data() and have all subdrivers
> > going back to the regular platform_data way. They would no longer be dependant
> > on the MFD code except for those who really need it. In that case they could
> > just call mfd_get_cell() and get full access to their MFD cell.
> 
> The revert to platform_data needs to happen ASAP though.  If this
> second step isn't ready really quickly, then the current patches
> should be reverted to give some breathing room for creating the
> replacement patches.  However, it's not such a rush if the below
> patch really does eliminate all of the nastiness of the original
> series. (I haven't looked and a rolled up diff of the first series and
> this change, so I don't know for sure).
I am done reverting these changes, with a final patch getting rid of
mfd_get_data. See
git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6.git for-linus

I still need to give it a second review before pushing it to lkml for
comments. It's 20 patches long, so I'm not entirely sure Linus would take that
at that point.
Pushing patch #1 would be enough for fixing the issues introduced by the
original patchset, so I'm leaning toward pushing it and leaving the 19 other
patches for the next merge window.


> In principle I agree with this patch.  Some comments below.
Thanks for the comments. I think I addressed all of them in patch #1:


---
 drivers/base/platform.c  |    1 +
 drivers/mfd/mfd-core.c   |   15 +++++++++++++--
 include/linux/device.h   |    3 +++
 include/linux/mfd/core.h |    7 +++++--
 4 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index f051cff..bde6b97 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -149,6 +149,7 @@ static void platform_device_release(struct device *dev)
 
 	of_device_node_put(&pa->pdev.dev);
 	kfree(pa->pdev.dev.platform_data);
+	kfree(pa->pdev.dev.mfd_cell);
 	kfree(pa->pdev.resource);
 	kfree(pa);
 }
diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index d01574d..99b0d6d 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -18,6 +18,18 @@
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>
 
+static int mfd_platform_add_cell(struct platform_device *pdev, const struct mfd_cell *cell)
+{
+	if (!cell)
+		return 0;
+
+	pdev->dev.mfd_cell = kmemdup(cell, sizeof(*cell), GFP_KERNEL);
+	if (!pdev->dev.mfd_cell)
+		return -ENOMEM;
+
+	return 0;
+}
+
 int mfd_cell_enable(struct platform_device *pdev)
 {
 	const struct mfd_cell *cell = mfd_get_cell(pdev);
@@ -75,7 +87,7 @@ static int mfd_add_device(struct device *parent, int id,
 
 	pdev->dev.parent = parent;
 
-	ret = platform_device_add_data(pdev, cell, sizeof(*cell));
+	ret = mfd_platform_add_cell(pdev, cell);
 	if (ret)
 		goto fail_res;
 
@@ -123,7 +135,6 @@ static int mfd_add_device(struct device *parent, int id,
 
 	return 0;
 
-/*	platform_device_del(pdev); */
 fail_res:
 	kfree(res);
 fail_device:
diff --git a/include/linux/device.h b/include/linux/device.h
index ab8dfc0..cf353cf 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -33,6 +33,7 @@ struct class;
 struct subsys_private;
 struct bus_type;
 struct device_node;
+struct mfd_cell;
 
 struct bus_attribute {
 	struct attribute	attr;
@@ -444,6 +445,8 @@ struct device {
 	struct device_node	*of_node; /* associated device tree node */
 	const struct of_device_id *of_match; /* matching of_device_id from driver */
 
+	struct mfd_cell	*mfd_cell; /* MFD cell pointer */
+
 	dev_t			devt;	/* dev_t, creates the sysfs "dev" */
 
 	spinlock_t		devres_lock;
diff --git a/include/linux/mfd/core.h b/include/linux/mfd/core.h
index ad1b19a..28f81cf 100644
--- a/include/linux/mfd/core.h
+++ b/include/linux/mfd/core.h
@@ -86,7 +86,7 @@ extern int mfd_clone_cell(const char *cell, const char **clones,
  */
 static inline const struct mfd_cell *mfd_get_cell(struct platform_device *pdev)
 {
-	return pdev->dev.platform_data;
+	return pdev->dev.mfd_cell;
 }
 
 /*
@@ -95,7 +95,10 @@ static inline const struct mfd_cell *mfd_get_cell(struct platform_device *pdev)
  */
 static inline void *mfd_get_data(struct platform_device *pdev)
 {
-	return mfd_get_cell(pdev)->mfd_data;
+	if (pdev->dev.mfd_cell)
+		return mfd_get_cell(pdev)->mfd_data;
+	else
+		return pdev->dev.platform_data;
 }
 
 extern int mfd_add_devices(struct device *parent, int id,
-- 
1.7.2.3

-- 
Intel Open Source Technology Centre
http://oss.intel.com/

  reply	other threads:[~2011-04-06 15:23 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-03  3:54 [RFC] [PATCH 0/19] mfd sharing support Andres Salomon
2011-02-03  3:55 ` [PATCH 01/19] mfd-core: unconditionally add mfd_cell to every platform_device Andres Salomon
2011-02-03  3:58 ` [PATCH 02/19] jz4740: mfd_cell is now implicitly available to drivers Andres Salomon
2011-02-03  8:09   ` Jean Delvare
2011-02-03  4:01 ` [PATCH 03/19] ab3550: " Andres Salomon
2011-02-04  8:20   ` Mattias Wallin
2011-02-03  4:03 ` [PATCH 04/19] ab3100: " Andres Salomon
2011-02-03 12:52   ` Linus Walleij
2011-02-03  4:04 ` [PATCH 05/19] asic3: " Andres Salomon
2011-02-03  4:05 ` [PATCH 06/19] htc-pasic3: " Andres Salomon
2011-02-03  4:08 ` [PATCH 07/19] timberdale: " Andres Salomon
2011-03-31 23:05   ` Grant Likely
2011-04-01 11:20     ` Samuel Ortiz
2011-04-01 17:47       ` Andres Salomon
2011-04-01 17:56         ` Grant Likely
2011-04-01 18:00           ` Grant Likely
2011-04-01 23:52           ` Samuel Ortiz
2011-04-01 23:58             ` Grant Likely
2011-04-02  0:10               ` Andres Salomon
2011-04-04 10:03               ` Samuel Ortiz
2011-04-05  3:04                 ` Grant Likely
2011-04-06 15:23                   ` Samuel Ortiz [this message]
2011-04-06 15:58                     ` Greg KH
2011-04-06 17:05                       ` Samuel Ortiz
2011-04-06 17:16                         ` Ben Hutchings
2011-04-06 17:51                           ` Samuel Ortiz
2011-04-06 18:07                             ` Ben Hutchings
2011-04-06 17:56                         ` Greg KH
2011-04-06 18:25                           ` Andres Salomon
2011-04-06 18:38                             ` Greg KH
2011-04-07  8:04                               ` Grant Likely
2011-04-06 18:47                           ` Samuel Ortiz
2011-04-06 18:59                             ` Felipe Balbi
2011-04-06 22:09                               ` Greg KH
2011-04-07  8:09                                 ` Felipe Balbi
2011-04-07 13:40                               ` Samuel Ortiz
2011-04-07 14:35                                 ` Grant Likely
2011-04-07 15:03                                   ` Samuel Ortiz
2011-04-07 18:06                                     ` Grant Likely
2011-04-07 16:24                   ` Grant Likely
2011-04-01 18:26         ` Samuel Ortiz
2011-02-03  4:09 ` [PATCH 08/19] t7166xb: " Andres Salomon
2011-02-03  4:11 ` [PATCH 09/19] wl1273: " Andres Salomon
2011-02-03  4:12 ` [PATCH 10/19] sh_mobile_sdhi: " Andres Salomon
2011-02-03  4:13 ` [PATCH 11/19] tc6393xb: " Andres Salomon
2011-02-03  4:15 ` [PATCH 12/19] twl4030: " Andres Salomon
2011-02-03  6:05   ` Dmitry Torokhov
2011-02-03  6:39     ` Andres Salomon
2011-02-03  6:53       ` Dmitry Torokhov
2011-02-03  7:03         ` Andres Salomon
2011-02-03  9:31           ` Mark Brown
2011-02-05  2:39             ` Andres Salomon
2011-02-05  3:25               ` Andres Salomon
2011-02-03 12:23           ` Peter Ujfalusi
2011-02-04 10:41           ` Uwe Kleine-König
2011-02-03  4:16 ` [PATCH 13/19] tc6387xb: " Andres Salomon
2011-02-03  4:17 ` [PATCH 14/19] janz: " Andres Salomon
2011-02-03  4:20 ` [PATCH 15/19] mc13xxx: " Andres Salomon
2011-02-04  9:34   ` Uwe Kleine-König
2011-02-04 10:13     ` Uwe Kleine-König
2011-02-04 10:16     ` Andres Salomon
2011-02-03  4:21 ` [PATCH 16/19] mfd-core: drop platform_data/data_size from core mfd_cell struct Andres Salomon
2011-02-03  4:22 ` [PATCH 17/19] mfd-core: add refcounting support to mfd_cells Andres Salomon
2011-02-03  4:23 ` [PATCH 18/19] mfd-core: add platform_device sharing support for mfd Andres Salomon
2011-02-03  4:26 ` [PATCH 19/19] cs5535-mfd: add sharing for acpi/pms cells Andres Salomon

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20110406152322.GA2757@sortiz-mobl \
    --to=sameo@linux.intel.com \
    --cc=ben-linux@fluff.org \
    --cc=broonie@opensource.wolfsonmicro.com \
    --cc=dbrownell@users.sourceforge.net \
    --cc=dilinger@queued.net \
    --cc=grant.likely@secretlab.ca \
    --cc=gregkh@suse.de \
    --cc=info@mocean-labs.com \
    --cc=jacmet@sunsite.dk \
    --cc=khali@linux-fr.org \
    --cc=linux-i2c@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-media@vger.kernel.org \
    --cc=mchehab@infradead.org \
    --cc=netdev@vger.kernel.org \
    --cc=spi-devel-general@lists.sourceforge.net \
    --subject='Re: [PATCH 07/19] timberdale: mfd_cell is now implicitly available to drivers' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).