Re: [PATCH V2] i2c: move of helpers into the core

[Sylwester Nawrocki <s.nawrocki@samsung.com>]

On 08/21/2013 03:47 PM, Wolfram Sang wrote:
> I2C of helpers used to live in of_i2c.c but experience (from SPI) shows
> that it is much cleaner to have this in the core. This also removes a
> circular dependency between the helpers and the core, and so we can
> finally register child nodes in the core instead of doing this manually
> in each driver. So, fix the drivers and documentation, too.
> 
> Acked-by: Sylwester Nawrocki <s.nawrocki@amsung.com>
> Acked-by: Rob Herring <rob.herring@calxeda.com>
> Reviewed-by: Felipe Balbi <balbi@ti.com>
> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

With this patch there are still couple of of_i2c.h header file
inclusions:

$ git grep of_i2c.h
arch/powerpc/platforms/44x/warp.c:#include <linux/of_i2c.h>
drivers/gpu/drm/tilcdc/tilcdc_slave.c:#include <linux/of_i2c.h>
drivers/gpu/drm/tilcdc/tilcdc_tfp410.c:#include <linux/of_i2c.h>
drivers/gpu/host1x/drm/output.c:#include <linux/of_i2c.h>
drivers/media/platform/exynos4-is/fimc-is.c:#include <linux/of_i2c.h>
drivers/media/platform/exynos4-is/media-dev.c:#include <linux/of_i2c.h>
drivers/staging/imx-drm/imx-tve.c:#include <linux/of_i2c.h>
sound/soc/fsl/imx-sgtl5000.c:#include <linux/of_i2c.h>
sound/soc/fsl/imx-wm8962.c:#include <linux/of_i2c.h>


Please include also this chunk, without it I'm getting build errors.

--------------8<---------------------
diff --git a/drivers/media/platform/exynos4-is/fimc-is-i2c.c
b/drivers/media/platform/exynos4-is/fimc-is-i2c.c
index ca07b48..e38e9dc 100644
--- a/drivers/media/platform/exynos4-is/fimc-is-i2c.c
+++ b/drivers/media/platform/exynos4-is/fimc-is-i2c.c
@@ -11,6 +11,7 @@
  */

 #include <linux/clk.h>
+#include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
diff --git a/drivers/media/platform/exynos4-is/fimc-is.c
b/drivers/media/platform/exynos4-is/fimc-is.c
index 6743ae3..63e4f1d 100644
--- a/drivers/media/platform/exynos4-is/fimc-is.c
+++ b/drivers/media/platform/exynos4-is/fimc-is.c
@@ -21,7 +21,6 @@
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/of_i2c.h>
 #include <linux/of_irq.h>
 #include <linux/of_address.h>
 #include <linux/of_platform.h>
diff --git a/drivers/media/platform/exynos4-is/media-dev.c
b/drivers/media/platform/exynos4-is/media-dev.c
index c10dee2..00e5f91 100644
--- a/drivers/media/platform/exynos4-is/media-dev.c
+++ b/drivers/media/platform/exynos4-is/media-dev.c
@@ -22,7 +22,6 @@
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/of_device.h>
-#include <linux/of_i2c.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/types.h>
--------------8<---------------------

> ---
> 
> V1 -> V2: * Add #else branch to #if CONFIG_OF
> 	  * EXPORT_SYMBOLs got attached to wrong functions
> 	  * cosmetic change (of -> OF)
> 	  * properly based on 3.11-rc4
> 
>  Documentation/acpi/enumeration.txt              |    1 -
>  drivers/i2c/busses/i2c-at91.c                   |    3 -
>  drivers/i2c/busses/i2c-cpm.c                    |    6 --
>  drivers/i2c/busses/i2c-davinci.c                |    2 -
>  drivers/i2c/busses/i2c-designware-platdrv.c     |    2 -
>  drivers/i2c/busses/i2c-gpio.c                   |    3 -
>  drivers/i2c/busses/i2c-i801.c                   |    2 -
>  drivers/i2c/busses/i2c-ibm_iic.c                |    4 -
>  drivers/i2c/busses/i2c-imx.c                    |    3 -
>  drivers/i2c/busses/i2c-mpc.c                    |    2 -
>  drivers/i2c/busses/i2c-mv64xxx.c                |    3 -
>  drivers/i2c/busses/i2c-mxs.c                    |    3 -
>  drivers/i2c/busses/i2c-nomadik.c                |    3 -
>  drivers/i2c/busses/i2c-ocores.c                 |    3 -
>  drivers/i2c/busses/i2c-octeon.c                 |    3 -
>  drivers/i2c/busses/i2c-omap.c                   |    3 -
>  drivers/i2c/busses/i2c-pnx.c                    |    3 -
>  drivers/i2c/busses/i2c-powermac.c               |    9 +-
>  drivers/i2c/busses/i2c-pxa.c                    |    2 -
>  drivers/i2c/busses/i2c-s3c2410.c                |    2 -
>  drivers/i2c/busses/i2c-sh_mobile.c              |    2 -
>  drivers/i2c/busses/i2c-sirf.c                   |    3 -
>  drivers/i2c/busses/i2c-stu300.c                 |    2 -
>  drivers/i2c/busses/i2c-tegra.c                  |    3 -
>  drivers/i2c/busses/i2c-versatile.c              |    2 -
>  drivers/i2c/busses/i2c-wmt.c                    |    3 -
>  drivers/i2c/busses/i2c-xiic.c                   |    3 -
>  drivers/i2c/i2c-core.c                          |  109 +++++++++++++++++++++-
>  drivers/i2c/i2c-mux.c                           |    3 -
>  drivers/i2c/muxes/i2c-arb-gpio-challenge.c      |    1 -
>  drivers/i2c/muxes/i2c-mux-gpio.c                |    1 -
>  drivers/i2c/muxes/i2c-mux-pinctrl.c             |    1 -
>  drivers/media/platform/exynos4-is/fimc-is-i2c.c |    3 -
>  drivers/of/Kconfig                              |    6 --
>  drivers/of/Makefile                             |    1 -
>  drivers/of/of_i2c.c                             |  114 -----------------------
>  include/linux/i2c.h                             |   20 ++++
>  include/linux/of_i2c.h                          |   46 ---------
>  38 files changed, 132 insertions(+), 253 deletions(-)
>  delete mode 100644 drivers/of/of_i2c.c
>  delete mode 100644 include/linux/of_i2c.h

I've tested this patch on Exynos4412 SoC based board, so this covers
i2c-s3c2410 and fimc-is-i2c. Compiled with CONFIG_OF enabled.

I guess after removing all remaining occurrences of
#include <linux/of_i2c.h> you could add:

Tested-by: Sylwester Nawrocki <s.nawrocki@samsung.com>

--
Thanks,
Sylwester