linux-kernel - [PATCH 2.6.30] fsl_devices.h: Bring the legacy fsl_spi_platform

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Date:	Wed, 15 Apr 2009 03:39:39 +0400
From:	Anton Vorontsov <avorontsov@...mvista.com>
To:	Grant Likely <grant.likely@...retlab.ca>
Cc:	subrata@...ux.vnet.ibm.com, sachinp <sachinp@...ux.vnet.ibm.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	Greg KH <greg@...ah.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linuxppc-dev <Linuxppc-dev@...abs.org>,
	linux-next <linux-next@...r.kernel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Alexander Beregalov <a.beregalov@...il.com>
Subject: [PATCH 2.6.30] fsl_devices.h: Bring the legacy
	fsl_spi_platform_data hooks back

In commit 364fdbc00fbdd409ade63500710123fe323aa164 ("spi_mpc83xx:
rework chip selects handling"), I merged activate_cs and deactivate_cs
hooks into cs_control, but I overlooked that mpc52xx_psc_spi driver
is using these hooks too. And that resulted in the following build
failure:

CC      drivers/spi/mpc52xx_psc_spi.o
drivers/spi/mpc52xx_psc_spi.c: In function 'mpc52xx_psc_spi_do_probe':
drivers/spi/mpc52xx_psc_spi.c:398: error: 'struct fsl_spi_platform_data'
has no member named 'activate_cs'
drivers/spi/mpc52xx_psc_spi.c:399: error: 'struct fsl_spi_platform_data'
has no member named 'deactivate_cs'
make[2]: *** [drivers/spi/mpc52xx_psc_spi.o] Error 1

This patch simply adds the legacy hooks back for 2.6.30, and for
2.6.31 we'll convert the driver to ->cs_control.

Reported-by: Subrata Modak <subrata@...ux.vnet.ibm.com>
Signed-off-by: Anton Vorontsov <avorontsov@...mvista.com>
---

On Tue, Apr 14, 2009 at 05:03:52PM -0600, Grant Likely wrote:
[...]
> > Hm. struct fsl_spi_platform_data is still there. It's just there
> > is no two functions (activate_cs and deactivate_cs) any longer,
> > there's just one: cs_ontrol that takes "spi_device" and "on"
> > arguments).
> >
> > And the build fix (down below) is trivial.
> 
> Regardless of how trivial the build fix is for in-tree, I'm not
> thrilled with breaking out of tree users.  I don't bend over backwards
> for out-of-tree, but the decision should be intentional and not forced
> into, especially during the stabilization period.  Please add the
> hooks back for 2.6.30.  You can send another patch targeted at 2.6.31
> -next to remove them again so that it can be discussed properly on the
> list.

Okay. Here it is.

 include/linux/fsl_devices.h |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/include/linux/fsl_devices.h b/include/linux/fsl_devices.h
index f2a78b5..0cde180 100644
--- a/include/linux/fsl_devices.h
+++ b/include/linux/fsl_devices.h
@@ -83,6 +83,10 @@ struct fsl_spi_platform_data {
 	u16	max_chipselect;
 	void	(*cs_control)(struct spi_device *spi, bool on);
 	u32	sysclk;
+
+	/* Legacy hooks, used by mpc52xx_psc_spi driver. */
+	void	(*activate_cs)(u8 cs, u8 polarity);
+	void	(*deactivate_cs)(u8 cs, u8 polarity);
 };
 
 struct mpc8xx_pcmcia_ops {
-- 
1.6.2.2

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