I2C support for CE4100, v2

I2C support for CE4100, v2

[Sebastian Andrzej Siewior]

The I2C core inside CE4100 is very much the same as in PXA25x.
I Cc the ARM folks because patch 2 reorganizes some files so that they
can be accessed from x86.
The I2C device is behind a PCI bus. The PCI probe code simply creates
three platform devices so we don't have much changes to the platform
driver. There is no clock framework on x86 and the peripherals don't
support changing their clocks or to enable/disable them. So I provided
dummy function which keep the driver happy.
This series indirectly depends on the SPI series I've sent earlier
because both modify include files and spi & i2c includes are sometimes
too close to each other.

History:
v1: Initial post
v2: - ISAR is still touched if not in SLAVE mode except on X86 where it
      is not touched at all.
    - There are no files created in include/asm
    - register defines are in common code
    - the PCI controller now requires a device tree. It is used to obtain
      an id (which is used as device & i2c bus id).
    - the PCI part now uses ARRAY_SIZE(). As it turns out pci_select_bars()
      is not useable.
    - the patch which resetted the chip if the i2c bus was not available
      has been dropped.

The patch series has been created with the -M option so file moves can
be easily noticed. The whole series (including spi) is also available at
  git://git.linutronix.de/users/bigeasy/soda.git spi-i2c

Sebastian Andrzej Siewior (6):
      i2c/pxa2xx: Don't touch ISAR on X86
      arm/pxa2xx: reorganize I2C files
      i2c/pxa2xx: Add PCI support for PXA I2C controller
      i2c/pxa2xx: add support for shared IRQ handler
      i2c/pxa2xx: check timeout correctly
      i2c/pxa2xx: pass of_node from platform driver to adapter and publish

 arch/arm/mach-mmp/include/mach/mmp2.h              |    2 +-
 arch/arm/mach-mmp/include/mach/pxa168.h            |    2 +-
 arch/arm/mach-mmp/include/mach/pxa910.h            |    2 +-
 arch/arm/mach-pxa/balloon3.c                       |    3 +-
 arch/arm/mach-pxa/cm-x300.c                        |    2 +-
 arch/arm/mach-pxa/colibri-pxa270-income.c          |    3 +-
 arch/arm/mach-pxa/corgi.c                          |    2 +-
 arch/arm/mach-pxa/csb726.c                         |    2 +-
 arch/arm/mach-pxa/devices.c                        |    2 +-
 arch/arm/mach-pxa/em-x270.c                        |    2 +-
 arch/arm/mach-pxa/ezx.c                            |    2 +-
 arch/arm/mach-pxa/hx4700.c                         |    2 +-
 arch/arm/mach-pxa/littleton.c                      |    2 +-
 arch/arm/mach-pxa/magician.c                       |    2 +-
 arch/arm/mach-pxa/mainstone.c                      |    2 +-
 arch/arm/mach-pxa/mioa701.c                        |    2 +-
 arch/arm/mach-pxa/mxm8x10.c                        |    2 +-
 arch/arm/mach-pxa/palm27x.c                        |    3 +-
 arch/arm/mach-pxa/pcm990-baseboard.c               |    2 +-
 arch/arm/mach-pxa/poodle.c                         |    2 +-
 arch/arm/mach-pxa/pxa27x.c                         |    2 +-
 arch/arm/mach-pxa/pxa3xx.c                         |    2 +-
 arch/arm/mach-pxa/raumfeld.c                       |    2 +-
 arch/arm/mach-pxa/saar.c                           |    2 +-
 arch/arm/mach-pxa/spitz.c                          |    3 +-
 arch/arm/mach-pxa/stargate2.c                      |    2 +-
 arch/arm/mach-pxa/tavorevb3.c                      |    3 +-
 arch/arm/mach-pxa/tosa.c                           |    2 +-
 arch/arm/mach-pxa/trizeps4.c                       |    2 +-
 arch/arm/mach-pxa/viper.c                          |    2 +-
 arch/arm/mach-pxa/vpac270.c                        |    3 +-
 arch/arm/mach-pxa/xcep.c                           |    3 +-
 arch/arm/mach-pxa/z2.c                             |    3 +-
 arch/arm/mach-pxa/zeus.c                           |    3 +-
 arch/arm/mach-pxa/zylonite_pxa300.c                |    2 +-
 drivers/i2c/busses/Kconfig                         |    7 +-
 drivers/i2c/busses/Makefile                        |    1 +
 drivers/i2c/busses/i2c-pxa-pci.c                   |  177 ++++++++++++++++++++
 drivers/i2c/busses/i2c-pxa.c                       |   75 +++++++--
 .../plat/i2c.h => include/linux/i2c/pxa-i2c.h      |    0
 40 files changed, 276 insertions(+), 63 deletions(-)
 create mode 100644 drivers/i2c/busses/i2c-pxa-pci.c
 rename arch/arm/plat-pxa/include/plat/i2c.h => include/linux/i2c/pxa-i2c.h (100%)

Sebastian

[PATCH 1/6] i2c/pxa2xx: Don't touch ISAR on X86

[Sebastian Andrzej Siewior]

The reset functions sets writes the slave address even in not slave
mode. I don't see any reason in writting it if slave mode is not
enabled.
Ben Dooks was conserned about making this change make it unavable on X86
where it is not available.

Cc: ben-i2c at fluff.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
---
 drivers/i2c/busses/i2c-pxa.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index f4c19a9..aadf9d2 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -418,7 +418,9 @@ static void i2c_pxa_reset(struct pxa_i2c *i2c)
 	writel(I2C_ISR_INIT, _ISR(i2c));
 	writel(readl(_ICR(i2c)) & ~ICR_UR, _ICR(i2c));
 
+#ifndef CONFIG_X86
 	writel(i2c->slave_addr, _ISAR(i2c));
+#endif
 
 	/* set control register values */
 	writel(I2C_ICR_INIT | (i2c->fast_mode ? ICR_FM : 0), _ICR(i2c));
-- 
1.7.3.2

[PATCH 2/6] arm/pxa2xx: reorganize I2C files

[Sebastian Andrzej Siewior]

This patch moves the register definitions into include/asm so it can be
accessed from X86 the same way as on ARM. This move also alters the
unused register offset definitins (IBMR, ...) and uses them in the
calculation macros (_IBMR,...).
The header file from plat-pxa is moved the include/linux for the same
reason.
This change should make no functional change to the PXA code. The move
is verified by building the following defconfigs:
  cm_x2xx_defconfig corgi_defconfig em_x270_defconfig ezx_defconfig
  imote2_defconfig pxa3xx_defconfig spitz_defconfig zeus_defconfig
  raumfeld_defconfig magician_defconfig mmp2_defconfig pxa168_defconfig
  pxa910_defconfig

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
---
 arch/arm/mach-mmp/include/mach/mmp2.h              |    2 +-
 arch/arm/mach-mmp/include/mach/pxa168.h            |    2 +-
 arch/arm/mach-mmp/include/mach/pxa910.h            |    2 +-
 arch/arm/mach-pxa/balloon3.c                       |    3 +-
 arch/arm/mach-pxa/cm-x300.c                        |    2 +-
 arch/arm/mach-pxa/colibri-pxa270-income.c          |    3 +-
 arch/arm/mach-pxa/corgi.c                          |    2 +-
 arch/arm/mach-pxa/csb726.c                         |    2 +-
 arch/arm/mach-pxa/devices.c                        |    2 +-
 arch/arm/mach-pxa/em-x270.c                        |    2 +-
 arch/arm/mach-pxa/ezx.c                            |    2 +-
 arch/arm/mach-pxa/hx4700.c                         |    2 +-
 arch/arm/mach-pxa/littleton.c                      |    2 +-
 arch/arm/mach-pxa/magician.c                       |    2 +-
 arch/arm/mach-pxa/mainstone.c                      |    2 +-
 arch/arm/mach-pxa/mioa701.c                        |    2 +-
 arch/arm/mach-pxa/mxm8x10.c                        |    2 +-
 arch/arm/mach-pxa/palm27x.c                        |    3 +-
 arch/arm/mach-pxa/pcm990-baseboard.c               |    2 +-
 arch/arm/mach-pxa/poodle.c                         |    2 +-
 arch/arm/mach-pxa/pxa27x.c                         |    2 +-
 arch/arm/mach-pxa/pxa3xx.c                         |    2 +-
 arch/arm/mach-pxa/raumfeld.c                       |    2 +-
 arch/arm/mach-pxa/saar.c                           |    2 +-
 arch/arm/mach-pxa/spitz.c                          |    3 +-
 arch/arm/mach-pxa/stargate2.c                      |    2 +-
 arch/arm/mach-pxa/tavorevb3.c                      |    3 +-
 arch/arm/mach-pxa/tosa.c                           |    2 +-
 arch/arm/mach-pxa/trizeps4.c                       |    2 +-
 arch/arm/mach-pxa/viper.c                          |    2 +-
 arch/arm/mach-pxa/vpac270.c                        |    3 +-
 arch/arm/mach-pxa/xcep.c                           |    3 +-
 arch/arm/mach-pxa/z2.c                             |    3 +-
 arch/arm/mach-pxa/zeus.c                           |    3 +-
 arch/arm/mach-pxa/zylonite_pxa300.c                |    2 +-
 drivers/i2c/busses/i2c-pxa.c                       |   31 +++++++++++---------
 .../plat/i2c.h => include/linux/i2c/pxa-i2c.h      |    0
 37 files changed, 52 insertions(+), 58 deletions(-)
 rename arch/arm/plat-pxa/include/plat/i2c.h => include/linux/i2c/pxa-i2c.h (100%)

diff --git a/arch/arm/mach-mmp/include/mach/mmp2.h b/arch/arm/mach-mmp/include/mach/mmp2.h
index dbba6e8..95adfea 100644
--- a/arch/arm/mach-mmp/include/mach/mmp2.h
+++ b/arch/arm/mach-mmp/include/mach/mmp2.h
@@ -9,8 +9,8 @@ extern void __init mmp2_init_irq(void);
 extern void mmp2_clear_pmic_int(void);
 
 #include <linux/i2c.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <mach/devices.h>
-#include <plat/i2c.h>
 
 extern struct pxa_device_desc mmp2_device_uart1;
 extern struct pxa_device_desc mmp2_device_uart2;
diff --git a/arch/arm/mach-mmp/include/mach/pxa168.h b/arch/arm/mach-mmp/include/mach/pxa168.h
index 1801e42..a52b3d2 100644
--- a/arch/arm/mach-mmp/include/mach/pxa168.h
+++ b/arch/arm/mach-mmp/include/mach/pxa168.h
@@ -8,8 +8,8 @@ extern void __init pxa168_init_irq(void);
 extern void pxa168_clear_keypad_wakeup(void);
 
 #include <linux/i2c.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <mach/devices.h>
-#include <plat/i2c.h>
 #include <plat/pxa3xx_nand.h>
 #include <video/pxa168fb.h>
 #include <plat/pxa27x_keypad.h>
diff --git a/arch/arm/mach-mmp/include/mach/pxa910.h b/arch/arm/mach-mmp/include/mach/pxa910.h
index f13c49d..91be755 100644
--- a/arch/arm/mach-mmp/include/mach/pxa910.h
+++ b/arch/arm/mach-mmp/include/mach/pxa910.h
@@ -7,8 +7,8 @@ extern struct sys_timer pxa910_timer;
 extern void __init pxa910_init_irq(void);
 
 #include <linux/i2c.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <mach/devices.h>
-#include <plat/i2c.h>
 #include <plat/pxa3xx_nand.h>
 
 extern struct pxa_device_desc pxa910_device_uart1;
diff --git a/arch/arm/mach-pxa/balloon3.c b/arch/arm/mach-pxa/balloon3.c
index 21e1889..c137e45 100644
--- a/arch/arm/mach-pxa/balloon3.c
+++ b/arch/arm/mach-pxa/balloon3.c
@@ -27,6 +27,7 @@
 #include <linux/mtd/partitions.h>
 #include <linux/types.h>
 #include <linux/i2c/pcf857x.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <linux/mtd/nand.h>
 #include <linux/mtd/physmap.h>
 #include <linux/regulator/max1586.h>
@@ -51,8 +52,6 @@
 #include <mach/irda.h>
 #include <mach/ohci.h>
 
-#include <plat/i2c.h>
-
 #include "generic.h"
 #include "devices.h"
 
diff --git a/arch/arm/mach-pxa/cm-x300.c b/arch/arm/mach-pxa/cm-x300.c
index 922b107..fb12504 100644
--- a/arch/arm/mach-pxa/cm-x300.c
+++ b/arch/arm/mach-pxa/cm-x300.c
@@ -29,6 +29,7 @@
 
 #include <linux/i2c.h>
 #include <linux/i2c/pca953x.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <linux/mfd/da903x.h>
 #include <linux/regulator/machine.h>
@@ -48,7 +49,6 @@
 #include <mach/pxafb.h>
 #include <mach/mmc.h>
 #include <mach/ohci.h>
-#include <plat/i2c.h>
 #include <plat/pxa3xx_nand.h>
 #include <mach/audio.h>
 #include <mach/pxa3xx-u2d.h>
diff --git a/arch/arm/mach-pxa/colibri-pxa270-income.c b/arch/arm/mach-pxa/colibri-pxa270-income.c
index 37f0f3e..c2e1955 100644
--- a/arch/arm/mach-pxa/colibri-pxa270-income.c
+++ b/arch/arm/mach-pxa/colibri-pxa270-income.c
@@ -21,6 +21,7 @@
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
 #include <linux/pwm_backlight.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <linux/sysdev.h>
 
 #include <asm/irq.h>
@@ -33,8 +34,6 @@
 #include <mach/pxa27x-udc.h>
 #include <mach/pxafb.h>
 
-#include <plat/i2c.h>
-
 #include "devices.h"
 #include "generic.h"
 
diff --git a/arch/arm/mach-pxa/corgi.c b/arch/arm/mach-pxa/corgi.c
index 3b8dcac..c96c37b 100644
--- a/arch/arm/mach-pxa/corgi.c
+++ b/arch/arm/mach-pxa/corgi.c
@@ -24,6 +24,7 @@
 #include <linux/gpio.h>
 #include <linux/backlight.h>
 #include <linux/i2c.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <linux/io.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/ads7846.h>
@@ -45,7 +46,6 @@
 #include <asm/mach/irq.h>
 
 #include <mach/pxa25x.h>
-#include <plat/i2c.h>
 #include <mach/irda.h>
 #include <mach/mmc.h>
 #include <mach/udc.h>
diff --git a/arch/arm/mach-pxa/csb726.c b/arch/arm/mach-pxa/csb726.c
index 57cacaf..7cdc8e0 100644
--- a/arch/arm/mach-pxa/csb726.c
+++ b/arch/arm/mach-pxa/csb726.c
@@ -17,12 +17,12 @@
 #include <linux/mtd/partitions.h>
 #include <linux/sm501.h>
 #include <linux/smsc911x.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 #include <mach/csb726.h>
 #include <mach/mfp-pxa27x.h>
-#include <plat/i2c.h>
 #include <mach/mmc.h>
 #include <mach/ohci.h>
 #include <mach/pxa2xx-regs.h>
diff --git a/arch/arm/mach-pxa/devices.c b/arch/arm/mach-pxa/devices.c
index c4f9c71..0af4119 100644
--- a/arch/arm/mach-pxa/devices.c
+++ b/arch/arm/mach-pxa/devices.c
@@ -4,6 +4,7 @@
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
 #include <linux/spi/pxa2xx_spi.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <asm/pmu.h>
 #include <mach/udc.h>
@@ -16,7 +17,6 @@
 #include <mach/camera.h>
 #include <mach/audio.h>
 #include <mach/hardware.h>
-#include <plat/i2c.h>
 #include <plat/pxa3xx_nand.h>
 
 #include "devices.h"
diff --git a/arch/arm/mach-pxa/em-x270.c b/arch/arm/mach-pxa/em-x270.c
index b20b944..c89eaf7 100644
--- a/arch/arm/mach-pxa/em-x270.c
+++ b/arch/arm/mach-pxa/em-x270.c
@@ -31,6 +31,7 @@
 #include <linux/apm-emulation.h>
 #include <linux/i2c.h>
 #include <linux/i2c/pca953x.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <linux/regulator/userspace-consumer.h>
 
 #include <media/soc_camera.h>
@@ -45,7 +46,6 @@
 #include <mach/ohci.h>
 #include <mach/mmc.h>
 #include <plat/pxa27x_keypad.h>
-#include <plat/i2c.h>
 #include <mach/camera.h>
 
 #include "generic.h"
diff --git a/arch/arm/mach-pxa/ezx.c b/arch/arm/mach-pxa/ezx.c
index 142c711..15cbf6b 100644
--- a/arch/arm/mach-pxa/ezx.c
+++ b/arch/arm/mach-pxa/ezx.c
@@ -20,6 +20,7 @@
 #include <linux/gpio.h>
 #include <linux/gpio_keys.h>
 #include <linux/leds-lp3944.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <media/soc_camera.h>
 
@@ -30,7 +31,6 @@
 #include <mach/pxa27x.h>
 #include <mach/pxafb.h>
 #include <mach/ohci.h>
-#include <plat/i2c.h>
 #include <mach/hardware.h>
 #include <plat/pxa27x_keypad.h>
 #include <mach/camera.h>
diff --git a/arch/arm/mach-pxa/hx4700.c b/arch/arm/mach-pxa/hx4700.c
index f09526f..0f48649 100644
--- a/arch/arm/mach-pxa/hx4700.c
+++ b/arch/arm/mach-pxa/hx4700.c
@@ -35,6 +35,7 @@
 #include <linux/spi/spi.h>
 #include <linux/spi/pxa2xx_spi.h>
 #include <linux/usb/gpio_vbus.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
@@ -42,7 +43,6 @@
 
 #include <mach/pxa27x.h>
 #include <mach/hx4700.h>
-#include <plat/i2c.h>
 #include <mach/irda.h>
 
 #include <video/platform_lcd.h>
diff --git a/arch/arm/mach-pxa/littleton.c b/arch/arm/mach-pxa/littleton.c
index 8051925..abed4ef 100644
--- a/arch/arm/mach-pxa/littleton.c
+++ b/arch/arm/mach-pxa/littleton.c
@@ -28,6 +28,7 @@
 #include <linux/leds.h>
 #include <linux/mfd/da903x.h>
 #include <linux/i2c/max732x.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <asm/types.h>
 #include <asm/setup.h>
@@ -45,7 +46,6 @@
 #include <mach/mmc.h>
 #include <plat/pxa27x_keypad.h>
 #include <mach/littleton.h>
-#include <plat/i2c.h>
 #include <plat/pxa3xx_nand.h>
 
 #include "generic.h"
diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach-pxa/magician.c
index 9066376..e025dd3 100644
--- a/arch/arm/mach-pxa/magician.c
+++ b/arch/arm/mach-pxa/magician.c
@@ -28,6 +28,7 @@
 #include <linux/regulator/bq24022.h>
 #include <linux/regulator/machine.h>
 #include <linux/usb/gpio_vbus.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
@@ -36,7 +37,6 @@
 #include <mach/pxa27x.h>
 #include <mach/magician.h>
 #include <mach/pxafb.h>
-#include <plat/i2c.h>
 #include <mach/mmc.h>
 #include <mach/irda.h>
 #include <mach/ohci.h>
diff --git a/arch/arm/mach-pxa/mainstone.c b/arch/arm/mach-pxa/mainstone.c
index a980a5c..7740148 100644
--- a/arch/arm/mach-pxa/mainstone.c
+++ b/arch/arm/mach-pxa/mainstone.c
@@ -27,6 +27,7 @@
 #include <linux/gpio_keys.h>
 #include <linux/pwm_backlight.h>
 #include <linux/smc91x.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <asm/types.h>
 #include <asm/setup.h>
@@ -46,7 +47,6 @@
 #include <mach/mainstone.h>
 #include <mach/audio.h>
 #include <mach/pxafb.h>
-#include <plat/i2c.h>
 #include <mach/mmc.h>
 #include <mach/irda.h>
 #include <mach/ohci.h>
diff --git a/arch/arm/mach-pxa/mioa701.c b/arch/arm/mach-pxa/mioa701.c
index f5fb915..3b851f7 100644
--- a/arch/arm/mach-pxa/mioa701.c
+++ b/arch/arm/mach-pxa/mioa701.c
@@ -39,6 +39,7 @@
 #include <linux/usb/gpio_vbus.h>
 #include <linux/regulator/max1586.h>
 #include <linux/slab.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -50,7 +51,6 @@
 #include <mach/mmc.h>
 #include <mach/udc.h>
 #include <mach/pxa27x-udc.h>
-#include <plat/i2c.h>
 #include <mach/camera.h>
 #include <mach/audio.h>
 #include <media/soc_camera.h>
diff --git a/arch/arm/mach-pxa/mxm8x10.c b/arch/arm/mach-pxa/mxm8x10.c
index 462167a..7cb415a 100644
--- a/arch/arm/mach-pxa/mxm8x10.c
+++ b/arch/arm/mach-pxa/mxm8x10.c
@@ -22,8 +22,8 @@
 #include <linux/serial_8250.h>
 #include <linux/dm9000.h>
 #include <linux/gpio.h>
+#include <linux/i2c/pxa-i2c.h>
 
-#include <plat/i2c.h>
 #include <plat/pxa3xx_nand.h>
 
 #include <mach/pxafb.h>
diff --git a/arch/arm/mach-pxa/palm27x.c b/arch/arm/mach-pxa/palm27x.c
index 405b92a..ad077e8 100644
--- a/arch/arm/mach-pxa/palm27x.c
+++ b/arch/arm/mach-pxa/palm27x.c
@@ -22,6 +22,7 @@
 #include <linux/power_supply.h>
 #include <linux/usb/gpio_vbus.h>
 #include <linux/regulator/max1586.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -36,8 +37,6 @@
 #include <mach/palmasoc.h>
 #include <mach/palm27x.h>
 
-#include <plat/i2c.h>
-
 #include "generic.h"
 #include "devices.h"
 
diff --git a/arch/arm/mach-pxa/pcm990-baseboard.c b/arch/arm/mach-pxa/pcm990-baseboard.c
index f33647a..8d3c7a9 100644
--- a/arch/arm/mach-pxa/pcm990-baseboard.c
+++ b/arch/arm/mach-pxa/pcm990-baseboard.c
@@ -23,12 +23,12 @@
 #include <linux/irq.h>
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <linux/pwm_backlight.h>
 
 #include <media/soc_camera.h>
 
 #include <asm/gpio.h>
-#include <plat/i2c.h>
 #include <mach/camera.h>
 #include <asm/mach/map.h>
 #include <mach/pxa27x.h>
diff --git a/arch/arm/mach-pxa/poodle.c b/arch/arm/mach-pxa/poodle.c
index c05eee3..90c265f 100644
--- a/arch/arm/mach-pxa/poodle.c
+++ b/arch/arm/mach-pxa/poodle.c
@@ -23,6 +23,7 @@
 #include <linux/mtd/physmap.h>
 #include <linux/gpio.h>
 #include <linux/i2c.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/ads7846.h>
 #include <linux/spi/pxa2xx_spi.h>
@@ -44,7 +45,6 @@
 #include <mach/irda.h>
 #include <mach/poodle.h>
 #include <mach/pxafb.h>
-#include <plat/i2c.h>
 
 #include <asm/hardware/scoop.h>
 #include <asm/hardware/locomo.h>
diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c
index d1fbf29..1c77e89 100644
--- a/arch/arm/mach-pxa/pxa27x.c
+++ b/arch/arm/mach-pxa/pxa27x.c
@@ -17,6 +17,7 @@
 #include <linux/suspend.h>
 #include <linux/platform_device.h>
 #include <linux/sysdev.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <mach/hardware.h>
 #include <asm/irq.h>
@@ -27,7 +28,6 @@
 #include <mach/ohci.h>
 #include <mach/pm.h>
 #include <mach/dma.h>
-#include <plat/i2c.h>
 
 #include "generic.h"
 #include "devices.h"
diff --git a/arch/arm/mach-pxa/pxa3xx.c b/arch/arm/mach-pxa/pxa3xx.c
index d1c747c..c9d9729 100644
--- a/arch/arm/mach-pxa/pxa3xx.c
+++ b/arch/arm/mach-pxa/pxa3xx.c
@@ -21,6 +21,7 @@
 #include <linux/irq.h>
 #include <linux/io.h>
 #include <linux/sysdev.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <mach/hardware.h>
 #include <mach/gpio.h>
@@ -30,7 +31,6 @@
 #include <mach/pm.h>
 #include <mach/dma.h>
 #include <mach/regs-intc.h>
-#include <plat/i2c.h>
 
 #include "generic.h"
 #include "devices.h"
diff --git a/arch/arm/mach-pxa/raumfeld.c b/arch/arm/mach-pxa/raumfeld.c
index 4121d03..dc35d85 100644
--- a/arch/arm/mach-pxa/raumfeld.c
+++ b/arch/arm/mach-pxa/raumfeld.c
@@ -32,6 +32,7 @@
 #include <linux/sched.h>
 #include <linux/pwm_backlight.h>
 #include <linux/i2c.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/spi_gpio.h>
 #include <linux/lis3lv02d.h>
@@ -53,7 +54,6 @@
 #include <mach/ohci.h>
 #include <mach/pxafb.h>
 #include <mach/mmc.h>
-#include <plat/i2c.h>
 #include <plat/pxa3xx_nand.h>
 
 #include "generic.h"
diff --git a/arch/arm/mach-pxa/saar.c b/arch/arm/mach-pxa/saar.c
index ffa50e6..6f65b79 100644
--- a/arch/arm/mach-pxa/saar.c
+++ b/arch/arm/mach-pxa/saar.c
@@ -20,6 +20,7 @@
 #include <linux/delay.h>
 #include <linux/fb.h>
 #include <linux/i2c.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <linux/smc91x.h>
 #include <linux/mfd/da903x.h>
 #include <linux/mtd/mtd.h>
@@ -31,7 +32,6 @@
 #include <asm/mach/flash.h>
 
 #include <mach/pxa930.h>
-#include <plat/i2c.h>
 #include <mach/pxafb.h>
 
 #include "devices.h"
diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
index 4fd5572..109a2a4 100644
--- a/arch/arm/mach-pxa/spitz.c
+++ b/arch/arm/mach-pxa/spitz.c
@@ -19,6 +19,7 @@
 #include <linux/gpio.h>
 #include <linux/leds.h>
 #include <linux/i2c.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <linux/i2c/pca953x.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/ads7846.h>
@@ -44,8 +45,6 @@
 #include <mach/spitz.h>
 #include <mach/sharpsl_pm.h>
 
-#include <plat/i2c.h>
-
 #include "generic.h"
 #include "devices.h"
 
diff --git a/arch/arm/mach-pxa/stargate2.c b/arch/arm/mach-pxa/stargate2.c
index 325f6ac..797471c 100644
--- a/arch/arm/mach-pxa/stargate2.c
+++ b/arch/arm/mach-pxa/stargate2.c
@@ -25,6 +25,7 @@
 #include <linux/mtd/plat-ram.h>
 #include <linux/mtd/partitions.h>
 
+#include <linux/i2c/pxa-i2c.h>
 #include <linux/i2c/pcf857x.h>
 #include <linux/i2c/at24.h>
 #include <linux/smc91x.h>
@@ -43,7 +44,6 @@
 #include <asm/mach/flash.h>
 
 #include <mach/pxa27x.h>
-#include <plat/i2c.h>
 #include <mach/mmc.h>
 #include <mach/udc.h>
 #include <mach/pxa27x-udc.h>
diff --git a/arch/arm/mach-pxa/tavorevb3.c b/arch/arm/mach-pxa/tavorevb3.c
index dc30116..11b8c3e 100644
--- a/arch/arm/mach-pxa/tavorevb3.c
+++ b/arch/arm/mach-pxa/tavorevb3.c
@@ -15,6 +15,7 @@
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
 #include <linux/i2c.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <linux/gpio.h>
 #include <linux/mfd/88pm860x.h>
 
@@ -23,8 +24,6 @@
 
 #include <mach/pxa930.h>
 
-#include <plat/i2c.h>
-
 #include "devices.h"
 #include "generic.h"
 
diff --git a/arch/arm/mach-pxa/tosa.c b/arch/arm/mach-pxa/tosa.c
index 7b5765d..d48881d 100644
--- a/arch/arm/mach-pxa/tosa.c
+++ b/arch/arm/mach-pxa/tosa.c
@@ -34,6 +34,7 @@
 #include <linux/spi/spi.h>
 #include <linux/spi/pxa2xx_spi.h>
 #include <linux/input/matrix_keypad.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <asm/setup.h>
 #include <asm/mach-types.h>
@@ -41,7 +42,6 @@
 #include <mach/pxa25x.h>
 #include <mach/reset.h>
 #include <mach/irda.h>
-#include <plat/i2c.h>
 #include <mach/mmc.h>
 #include <mach/udc.h>
 #include <mach/tosa_bt.h>
diff --git a/arch/arm/mach-pxa/trizeps4.c b/arch/arm/mach-pxa/trizeps4.c
index bdb02a0..995e671 100644
--- a/arch/arm/mach-pxa/trizeps4.c
+++ b/arch/arm/mach-pxa/trizeps4.c
@@ -26,6 +26,7 @@
 #include <linux/dm9000.h>
 #include <linux/mtd/physmap.h>
 #include <linux/mtd/partitions.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <asm/types.h>
 #include <asm/setup.h>
@@ -46,7 +47,6 @@
 #include <mach/mmc.h>
 #include <mach/irda.h>
 #include <mach/ohci.h>
-#include <plat/i2c.h>
 
 #include "generic.h"
 #include "devices.h"
diff --git a/arch/arm/mach-pxa/viper.c b/arch/arm/mach-pxa/viper.c
index 438fc9a..d36baac 100644
--- a/arch/arm/mach-pxa/viper.c
+++ b/arch/arm/mach-pxa/viper.c
@@ -36,6 +36,7 @@
 #include <linux/gpio.h>
 #include <linux/jiffies.h>
 #include <linux/i2c-gpio.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <linux/serial_8250.h>
 #include <linux/smc91x.h>
 #include <linux/pwm_backlight.h>
@@ -47,7 +48,6 @@
 #include <mach/pxa25x.h>
 #include <mach/audio.h>
 #include <mach/pxafb.h>
-#include <plat/i2c.h>
 #include <mach/regs-uart.h>
 #include <mach/arcom-pcmcia.h>
 #include <mach/viper.h>
diff --git a/arch/arm/mach-pxa/vpac270.c b/arch/arm/mach-pxa/vpac270.c
index f45ac09..4c812f9 100644
--- a/arch/arm/mach-pxa/vpac270.c
+++ b/arch/arm/mach-pxa/vpac270.c
@@ -26,6 +26,7 @@
 #include <linux/ucb1400.h>
 #include <linux/ata_platform.h>
 #include <linux/regulator/max1586.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -40,8 +41,6 @@
 #include <mach/udc.h>
 #include <mach/pata_pxa.h>
 
-#include <plat/i2c.h>
-
 #include "generic.h"
 #include "devices.h"
 
diff --git a/arch/arm/mach-pxa/xcep.c b/arch/arm/mach-pxa/xcep.c
index 3260ce7..e2bd5ce 100644
--- a/arch/arm/mach-pxa/xcep.c
+++ b/arch/arm/mach-pxa/xcep.c
@@ -16,6 +16,7 @@
 
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <linux/smc91x.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
@@ -26,8 +27,6 @@
 #include <asm/mach/irq.h>
 #include <asm/mach/map.h>
 
-#include <plat/i2c.h>
-
 #include <mach/hardware.h>
 #include <mach/pxa2xx-regs.h>
 #include <mach/mfp-pxa25x.h>
diff --git a/arch/arm/mach-pxa/z2.c b/arch/arm/mach-pxa/z2.c
index 1b8b71b..07c93a7 100644
--- a/arch/arm/mach-pxa/z2.c
+++ b/arch/arm/mach-pxa/z2.c
@@ -29,6 +29,7 @@
 #include <linux/gpio_keys.h>
 #include <linux/delay.h>
 #include <linux/regulator/machine.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -40,8 +41,6 @@
 #include <mach/mmc.h>
 #include <plat/pxa27x_keypad.h>
 
-#include <plat/i2c.h>
-
 #include "generic.h"
 #include "devices.h"
 
diff --git a/arch/arm/mach-pxa/zeus.c b/arch/arm/mach-pxa/zeus.c
index f5c9f30..838cafb 100644
--- a/arch/arm/mach-pxa/zeus.c
+++ b/arch/arm/mach-pxa/zeus.c
@@ -25,6 +25,7 @@
 #include <linux/mtd/partitions.h>
 #include <linux/mtd/physmap.h>
 #include <linux/i2c.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <linux/i2c/pca953x.h>
 #include <linux/apm-emulation.h>
 #include <linux/can/platform/mcp251x.h>
@@ -33,8 +34,6 @@
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
 
-#include <plat/i2c.h>
-
 #include <mach/pxa2xx-regs.h>
 #include <mach/regs-uart.h>
 #include <mach/ohci.h>
diff --git a/arch/arm/mach-pxa/zylonite_pxa300.c b/arch/arm/mach-pxa/zylonite_pxa300.c
index 3aa73b3..93c64d8 100644
--- a/arch/arm/mach-pxa/zylonite_pxa300.c
+++ b/arch/arm/mach-pxa/zylonite_pxa300.c
@@ -17,11 +17,11 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/i2c.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <linux/i2c/pca953x.h>
 #include <linux/gpio.h>
 
 #include <mach/pxa300.h>
-#include <plat/i2c.h>
 #include <mach/zylonite.h>
 
 #include "generic.h"
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index aadf9d2..667f6d9 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -34,9 +34,9 @@
 #include <linux/clk.h>
 #include <linux/slab.h>
 #include <linux/io.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <asm/irq.h>
-#include <plat/i2c.h>
 
 /*
  * I2C register offsets will be shifted 0 or 1 bit left, depending on
@@ -54,14 +54,8 @@ static const struct platform_device_id i2c_pxa_id_table[] = {
 MODULE_DEVICE_TABLE(platform, i2c_pxa_id_table);
 
 /*
- * I2C registers and bit definitions
+ * I2C bit definitions
  */
-#define IBMR		(0x00)
-#define IDBR		(0x08)
-#define ICR		(0x10)
-#define ISR		(0x18)
-#define ISAR		(0x20)
-
 #define ICR_START	(1 << 0)	   /* start bit */
 #define ICR_STOP	(1 << 1)	   /* stop bit */
 #define ICR_ACKNAK	(1 << 2)	   /* send ACK(0) or NAK(1) */
@@ -91,6 +85,21 @@ MODULE_DEVICE_TABLE(platform, i2c_pxa_id_table);
 #define ISR_SAD		(1 << 9)	   /* slave address detected */
 #define ISR_BED		(1 << 10)	   /* bus error no ACK/NAK */
 
+/*
+ * I2C registers definitions
+ */
+#define IBMR		(0x00)
+#define IDBR		(0x04)
+#define ICR		(0x08)
+#define ISR		(0x0c)
+#define ISAR		(0x10)
+
+#define _IBMR(i2c)	((i2c)->reg_base + (IBMR << (i2c)->reg_shift))
+#define _IDBR(i2c)	((i2c)->reg_base + (IDBR << (i2c)->reg_shift))
+#define _ICR(i2c)	((i2c)->reg_base + (ICR << (i2c)->reg_shift))
+#define _ISR(i2c)	((i2c)->reg_base + (ISR << (i2c)->reg_shift))
+#define _ISAR(i2c)	((i2c)->reg_base + (ISAR << (i2c)->reg_shift))
+
 struct pxa_i2c {
 	spinlock_t		lock;
 	wait_queue_head_t	wait;
@@ -121,12 +130,6 @@ struct pxa_i2c {
 	unsigned int		fast_mode :1;
 };
 
-#define _IBMR(i2c)	((i2c)->reg_base + (0x0 << (i2c)->reg_shift))
-#define _IDBR(i2c)	((i2c)->reg_base + (0x4 << (i2c)->reg_shift))
-#define _ICR(i2c)	((i2c)->reg_base + (0x8 << (i2c)->reg_shift))
-#define _ISR(i2c)	((i2c)->reg_base + (0xc << (i2c)->reg_shift))
-#define _ISAR(i2c)	((i2c)->reg_base + (0x10 << (i2c)->reg_shift))
-
 /*
  * I2C Slave mode address
  */
diff --git a/arch/arm/plat-pxa/include/plat/i2c.h b/include/linux/i2c/pxa-i2c.h
similarity index 100%
rename from arch/arm/plat-pxa/include/plat/i2c.h
rename to include/linux/i2c/pxa-i2c.h
-- 
1.7.3.2

[PATCH 3/6] i2c/pxa2xx: Add PCI support for PXA I2C controller

[Sebastian Andrzej Siewior]

The Sodaville I2C controller is almost the same as found on PXA2xx. The
difference:
- the register are at a different spot
- no slave support

The PCI probe code adds three platform devices which are probed then by
the platform code.
The X86 part also adds dummy clock defines because we don't have HW
clock support.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
---
 drivers/i2c/busses/Kconfig       |    7 +-
 drivers/i2c/busses/Makefile      |    1 +
 drivers/i2c/busses/i2c-pxa-pci.c |  177 ++++++++++++++++++++++++++++++++++++++
 drivers/i2c/busses/i2c-pxa.c     |   23 +++++
 4 files changed, 206 insertions(+), 2 deletions(-)
 create mode 100644 drivers/i2c/busses/i2c-pxa-pci.c

diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 3a6321c..9ee3e60 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -525,15 +525,18 @@ config I2C_PNX
 
 config I2C_PXA
 	tristate "Intel PXA2XX I2C adapter"
-	depends on ARCH_PXA || ARCH_MMP
+	depends on ARCH_PXA || ARCH_MMP || (X86_32 && PCI && OF)
 	help
 	  If you have devices in the PXA I2C bus, say yes to this option.
 	  This driver can also be built as a module.  If so, the module
 	  will be called i2c-pxa.
 
+config I2C_PXA_PCI
+	def_bool I2C_PXA && X86_32 && PCI && OF
+
 config I2C_PXA_SLAVE
 	bool "Intel PXA2XX I2C Slave comms support"
-	depends on I2C_PXA
+	depends on I2C_PXA && !X86_32
 	help
 	  Support I2C slave mode communications on the PXA I2C bus.  This
 	  is necessary for systems where the PXA may be a target on the
diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile
index 84cb16a..78db2e3 100644
--- a/drivers/i2c/busses/Makefile
+++ b/drivers/i2c/busses/Makefile
@@ -52,6 +52,7 @@ obj-$(CONFIG_I2C_PCA_PLATFORM)	+= i2c-pca-platform.o
 obj-$(CONFIG_I2C_PMCMSP)	+= i2c-pmcmsp.o
 obj-$(CONFIG_I2C_PNX)		+= i2c-pnx.o
 obj-$(CONFIG_I2C_PXA)		+= i2c-pxa.o
+obj-$(CONFIG_I2C_PXA_PCI)	+= i2c-pxa-pci.o
 obj-$(CONFIG_I2C_S3C2410)	+= i2c-s3c2410.o
 obj-$(CONFIG_I2C_S6000)		+= i2c-s6000.o
 obj-$(CONFIG_I2C_SH7760)	+= i2c-sh7760.o
diff --git a/drivers/i2c/busses/i2c-pxa-pci.c b/drivers/i2c/busses/i2c-pxa-pci.c
new file mode 100644
index 0000000..f7b74b9
--- /dev/null
+++ b/drivers/i2c/busses/i2c-pxa-pci.c
@@ -0,0 +1,177 @@
+/*
+ * The CE4100's I2C device is more or less the same one as found on PXA.
+ * It does not support slave mode, the register slightly moved. This PCI
+ * device provides three bars, every contains a single I2C controller.
+ */
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/i2c/pxa-i2c.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+
+/*
+ * the number of bars is hardcoded because pci_select_bars() reports the
+ * wrong thing.
+ */
+#define CE4100_PCI_I2C_DEVS	3
+
+struct ce4100_i2c_device {
+	struct platform_device pdev;
+	struct resource res[2];
+	struct i2c_pxa_platform_data pdata;
+};
+
+struct ce4100_devices {
+	struct ce4100_i2c_device sd[CE4100_PCI_I2C_DEVS];
+};
+
+static void plat_dev_release(struct device *dev)
+{
+	struct ce4100_i2c_device *sd = container_of(dev,
+			struct ce4100_i2c_device, pdev.dev);
+
+	of_device_node_put(&sd->pdev.dev);
+}
+
+static int add_i2c_device(struct pci_dev *dev, int bar,
+		struct ce4100_i2c_device *sd)
+{
+	struct platform_device *pdev = &sd->pdev;
+	struct i2c_pxa_platform_data *pdata = &sd->pdata;
+	struct device_node *child;
+	int found = 0;
+
+	pdev->name = "pxa2xx-i2c";
+	pdev->dev.release = plat_dev_release;
+	pdev->dev.parent = &dev->dev;
+
+	for_each_child_of_node(dev->dev.of_node, child) {
+		const void *prop;
+		u32 child_reg;
+
+		prop = of_get_property(child, "reg", NULL);
+		if (!prop)
+			continue;
+		child_reg = be32_to_cpup(prop);
+		if (child_reg != bar)
+			continue;
+
+		pdev->dev.of_node = child;
+
+		prop = of_get_property(child, "fast-mode", NULL);
+		if (prop)
+			pdata->fast_mode = 1;
+
+		prop = of_get_property(child, "id", NULL);
+		if (!prop)
+			return -EINVAL;
+
+		pdev->id = be32_to_cpup(prop);
+		found = 1;
+		break;
+	}
+
+	if (!found) {
+		dev_err(&dev->dev, "Missing DT node for bar %d at %s\n", bar,
+				dev->dev.of_node->full_name);
+		return -EINVAL;
+	}
+
+	pdev->dev.platform_data = pdata;
+	pdev->resource = sd->res;
+
+	sd->res[0].flags = IORESOURCE_MEM;
+	sd->res[0].start = pci_resource_start(dev, bar);
+	sd->res[0].end = pci_resource_end(dev, bar);
+
+	sd->res[1].flags = IORESOURCE_IRQ;
+	sd->res[1].start = dev->irq;
+	sd->res[1].end = dev->irq;
+
+	pdev->num_resources = 2;
+
+	return platform_device_register(pdev);
+}
+
+static int __devinit ce4100_i2c_probe(struct pci_dev *dev,
+		const struct pci_device_id *ent)
+{
+	int ret;
+	int i;
+	struct ce4100_devices *sds;
+
+	ret = pci_enable_device_mem(dev);
+	if (ret)
+		return ret;
+
+	if (!dev->dev.of_node) {
+		dev_err(&dev->dev, "Missing device tree node.\n");
+		return -EINVAL;
+	}
+	sds = kzalloc(sizeof(*sds), GFP_KERNEL);
+	if (!sds)
+		goto err_mem;
+
+	pci_set_drvdata(dev, sds);
+
+	for (i = 0; i < ARRAY_SIZE(sds->sd); i++) {
+		ret = add_i2c_device(dev, i, &sds->sd[i]);
+		if (ret) {
+			while (--i >= 0)
+				platform_device_unregister(&sds->sd[i].pdev);
+			goto err_dev_add;
+		}
+	}
+	return 0;
+
+err_dev_add:
+	pci_set_drvdata(dev, NULL);
+	kfree(sds);
+err_mem:
+	pci_disable_device(dev);
+	return ret;
+}
+
+static void __devexit ce4100_i2c_remove(struct pci_dev *dev)
+{
+	struct ce4100_devices *sds;
+	unsigned int i;
+
+	sds = pci_get_drvdata(dev);
+	pci_set_drvdata(dev, NULL);
+
+	for (i = 0; i < ARRAY_SIZE(sds->sd); i++)
+		platform_device_unregister(&sds->sd[i].pdev);
+
+	pci_disable_device(dev);
+	kfree(sds);
+}
+
+static struct pci_device_id ce4100_i2c_devices[] __devinitdata = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2e68)},
+	{ },
+};
+MODULE_DEVICE_TABLE(pci, ce4100_i2c_devices);
+
+static struct pci_driver ce4100_i2c_driver = {
+	.name           = "ce4100_i2c",
+	.id_table       = ce4100_i2c_devices,
+	.probe          = ce4100_i2c_probe,
+	.remove         = __devexit_p(ce4100_i2c_remove),
+};
+
+static int __init ce4100_i2c_init(void)
+{
+	return pci_register_driver(&ce4100_i2c_driver);
+}
+module_init(ce4100_i2c_init);
+
+static void __exit ce4100_i2c_exit(void)
+{
+	pci_unregister_driver(&ce4100_i2c_driver);
+}
+module_exit(ce4100_i2c_exit);
+
+MODULE_DESCRIPTION("CE4100 PCI-I2C glue code for PXA's driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index 667f6d9..32982fb 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -88,6 +88,8 @@ MODULE_DEVICE_TABLE(platform, i2c_pxa_id_table);
 /*
  * I2C registers definitions
  */
+#ifndef CONFIG_X86
+
 #define IBMR		(0x00)
 #define IDBR		(0x04)
 #define ICR		(0x08)
@@ -100,6 +102,27 @@ MODULE_DEVICE_TABLE(platform, i2c_pxa_id_table);
 #define _ISR(i2c)	((i2c)->reg_base + (ISR << (i2c)->reg_shift))
 #define _ISAR(i2c)	((i2c)->reg_base + (ISAR << (i2c)->reg_shift))
 
+#else
+
+#define IBMR            (0x14)
+#define IDBR            (0x0c)
+#define ICR             (0x00)
+#define ISR             (0x04)
+
+#define _IBMR(i2c)	((i2c)->reg_base + IBMR)
+#define _IDBR(i2c)	((i2c)->reg_base + IDBR)
+#define _ICR(i2c)	((i2c)->reg_base + ICR)
+#define _ISR(i2c)	((i2c)->reg_base + ISR)
+
+struct clk;
+
+#define clk_get(dev, id)	NULL
+#define clk_put(clk)		do { } while (0)
+#define clk_disable(clk)	do { } while (0)
+#define clk_enable(clk)		do { } while (0)
+
+#endif
+
 struct pxa_i2c {
 	spinlock_t		lock;
 	wait_queue_head_t	wait;
-- 
1.7.3.2

[PATCH 4/6] i2c/pxa2xx: add support for shared IRQ handler

[Sebastian Andrzej Siewior]

Sodaville has three of them on a single IRQ. IRQF_DISABLED is removed
because it is a NOP allready and scheduled for removal.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
---
 drivers/i2c/busses/i2c-pxa.c |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index 32982fb..7c724b2 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -943,11 +943,17 @@ static void i2c_pxa_irq_rxfull(struct pxa_i2c *i2c, u32 isr)
 	writel(icr, _ICR(i2c));
 }
 
+#define VALID_INT_SOURCE	(ISR_SSD | ISR_ALD | ISR_ITE | ISR_IRF | \
+				ISR_SAD | ISR_BED)
 static irqreturn_t i2c_pxa_handler(int this_irq, void *dev_id)
 {
 	struct pxa_i2c *i2c = dev_id;
 	u32 isr = readl(_ISR(i2c));
 
+	isr &= VALID_INT_SOURCE;
+	if (!isr)
+		return IRQ_NONE;
+
 	if (i2c_debug > 2 && 0) {
 		dev_dbg(&i2c->adap.dev, "%s: ISR=%08x, ICR=%08x, IBMR=%02x\n",
 			__func__, isr, readl(_ICR(i2c)), readl(_IBMR(i2c)));
@@ -962,7 +968,7 @@ static irqreturn_t i2c_pxa_handler(int this_irq, void *dev_id)
 	/*
 	 * Always clear all pending IRQs.
 	 */
-	writel(isr & (ISR_SSD|ISR_ALD|ISR_ITE|ISR_IRF|ISR_SAD|ISR_BED), _ISR(i2c));
+	writel(isr, _ISR(i2c));
 
 	if (isr & ISR_SAD)
 		i2c_pxa_slave_start(i2c, isr);
@@ -1100,7 +1106,7 @@ static int i2c_pxa_probe(struct platform_device *dev)
 		i2c->adap.algo = &i2c_pxa_pio_algorithm;
 	} else {
 		i2c->adap.algo = &i2c_pxa_algorithm;
-		ret = request_irq(irq, i2c_pxa_handler, IRQF_DISABLED,
+		ret = request_irq(irq, i2c_pxa_handler, IRQF_SHARED,
 				  i2c->adap.name, i2c);
 		if (ret)
 			goto ereqirq;
-- 
1.7.3.2

[PATCH 5/6] i2c/pxa2xx: check timeout correctly

[Sebastian Andrzej Siewior]

timeout here maybe 0 if the event occured and a task with a higher
priority stole the cpu and we were sleeping longer than the timeout
value we specified.
In case of a real timeout I changed the error code to I2C_RETRY so we
retry the transfer.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
---
 drivers/i2c/busses/i2c-pxa.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index 7c724b2..c2089fe 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -757,8 +757,10 @@ static int i2c_pxa_do_xfer(struct pxa_i2c *i2c, struct i2c_msg *msg, int num)
 	 */
 	ret = i2c->msg_idx;
 
-	if (timeout == 0)
+	if (!timeout && i2c->msg_num) {
 		i2c_pxa_scream_blue_murder(i2c, "timeout");
+		ret = I2C_RETRY;
+	}
 
  out:
 	return ret;
-- 
1.7.3.2

[PATCH 6/6] i2c/pxa2xx: pass of_node from platform driver to adapter and publish

[Sebastian Andrzej Siewior]

the of_node will auto-publish devices which are added to the device
tree.

Commit 925bb9c6 aka ("of/i2c: Fix module load order issue caused by
of_i2c.c) moved the of_i2c_register_devices() function from the i2c core
back to the drivers. This patch does the same thing for the pxa driver.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
---
 drivers/i2c/busses/i2c-pxa.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index c2089fe..294ac6c 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -29,6 +29,7 @@
 #include <linux/errno.h>
 #include <linux/interrupt.h>
 #include <linux/i2c-pxa.h>
+#include <linux/of_i2c.h>
 #include <linux/platform_device.h>
 #include <linux/err.h>
 #include <linux/clk.h>
@@ -1118,12 +1119,16 @@ static int i2c_pxa_probe(struct platform_device *dev)
 
 	i2c->adap.algo_data = i2c;
 	i2c->adap.dev.parent = &dev->dev;
+#ifdef CONFIG_OF
+	i2c->adap.dev.of_node = dev->dev.of_node;
+#endif
 
 	ret = i2c_add_numbered_adapter(&i2c->adap);
 	if (ret < 0) {
 		printk(KERN_INFO "I2C: Failed to add bus\n");
 		goto eadapt;
 	}
+	of_i2c_register_devices(&i2c->adap);
 
 	platform_set_drvdata(dev, i2c);
 
-- 
1.7.3.2

[PATCH 1/6] i2c/pxa2xx: Don't touch ISAR on X86

[Ben Dooks]

On Thu, Dec 02, 2010 at 09:09:44PM +0100, Sebastian Andrzej Siewior wrote:
> The reset functions sets writes the slave address even in not slave
> mode. I don't see any reason in writting it if slave mode is not
> enabled.
> Ben Dooks was conserned about making this change make it unavable on X86
> where it is not available.
> 
> Cc: ben-i2c at fluff.org
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
> ---
>  drivers/i2c/busses/i2c-pxa.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
> index f4c19a9..aadf9d2 100644
> --- a/drivers/i2c/busses/i2c-pxa.c
> +++ b/drivers/i2c/busses/i2c-pxa.c
> @@ -418,7 +418,9 @@ static void i2c_pxa_reset(struct pxa_i2c *i2c)
>  	writel(I2C_ISR_INIT, _ISR(i2c));
>  	writel(readl(_ICR(i2c)) & ~ICR_UR, _ICR(i2c));
>  
> +#ifndef CONFIG_X86
>  	writel(i2c->slave_addr, _ISAR(i2c));
> +#endif

I'd prefer some way of changing based on either the device name (see
some other drivers which bind on multiple names) to define things such
as this, as well as possibly changing the register layout.

-- 
Ben

Q:      What's a light-year?
A:      One-third less calories than a regular year.

[PATCH 1/6] i2c/pxa2xx: Don't touch ISAR on X86

[Sebastian Andrzej Siewior]

Ben Dooks wrote:
>> +#ifndef CONFIG_X86
>>  	writel(i2c->slave_addr, _ISAR(i2c));
>> +#endif


> I'd prefer some way of changing based on either the device name (see
> some other drivers which bind on multiple names) to define things such
> as this, as well as possibly changing the register layout.

Okay, I will hide this ISAR access a platform_device_id id.

Do you want me to also change the register access? This would be a
intrusive patch since I would have to touch every readl()/writel() line
in this file.

Sebastian

[sodaville] [PATCH 1/6] i2c/pxa2xx: Don't touch ISAR on X86

[Sebastian Andrzej Siewior]

* Sebastian Andrzej Siewior | 2010-12-03 19:17:04 [+0100]:

>Ben Dooks wrote:
>>> +#ifndef CONFIG_X86
>>>  	writel(i2c->slave_addr, _ISAR(i2c));
>>> +#endif
>
>
>> I'd prefer some way of changing based on either the device name (see
>> some other drivers which bind on multiple names) to define things such
>> as this, as well as possibly changing the register layout.
>
>Do you want me to also change the register access? This would be a
>intrusive patch since I would have to touch every readl()/writel() line
>in this file.
I've been looking at the wrong code while writting this. Here are two
variants. -variant2 containts the size using this patch. variant1 uses

 #define _IBMR(i2c)     ((i2c)->reg_base + pxa_reg_layout[(i2c)->layout].ibmr)

for the access.

    text    data     bss     dec     hex filename
    3753      84       0    3837     efd i2c-pxa-org.o
    4017      84       0    4101    1005 i2c-pxa-variant1.o
    3525      84       0    3609     e19 i2c-pxa-variant2.o

Are you fine with this?

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 drivers/i2c/busses/i2c-pxa.c |   64 +++++++++++++++++++++++++++++++----------
 1 files changed, 48 insertions(+), 16 deletions(-)

diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index f4c19a9..29ff876 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -38,17 +38,40 @@
 #include <asm/irq.h>
 #include <plat/i2c.h>
 
-/*
- * I2C register offsets will be shifted 0 or 1 bit left, depending on
- * different SoCs
- */
-#define REG_SHIFT_0	(0 << 0)
-#define REG_SHIFT_1	(1 << 0)
-#define REG_SHIFT(d)	((d) & 0x1)
+
+struct pxa_reg_layout {
+	u32 ibmr;
+	u32 idbr;
+	u32 icr;
+	u32 isr;
+	u32 isar;
+};
+
+enum pxa_i2c_types {
+	REGS_PXA2XX,
+	REGS_PXA3XX,
+};
+
+static struct pxa_reg_layout pxa_reg_layout[] = {
+	[REGS_PXA2XX] = {
+		.ibmr =	0x00,
+		.idbr =	0x10,
+		.icr =	0x20,
+		.isr =	0x30,
+		.isar =	0x40,
+
+	}, [REGS_PXA3XX] = {
+		.ibmr =	0x00,
+		.idbr =	0x08,
+		.icr =	0x10,
+		.isr =	0x18,
+		.isar =	0x20,
+	},
+};
 
 static const struct platform_device_id i2c_pxa_id_table[] = {
-	{ "pxa2xx-i2c",		REG_SHIFT_1 },
-	{ "pxa3xx-pwri2c",	REG_SHIFT_0 },
+	{ "pxa2xx-i2c",		REGS_PXA2XX },
+	{ "pxa3xx-pwri2c",	REGS_PXA3XX },
 	{ },
 };
 MODULE_DEVICE_TABLE(platform, i2c_pxa_id_table);
@@ -111,7 +134,11 @@ struct pxa_i2c {
 	u32			icrlog[32];
 
 	void __iomem		*reg_base;
-	unsigned int		reg_shift;
+	void __iomem		*reg_ibmr;
+	void __iomem		*reg_idbr;
+	void __iomem		*reg_icr;
+	void __iomem		*reg_isr;
+	void __iomem		*reg_isar;
 
 	unsigned long		iobase;
 	unsigned long		iosize;
@@ -121,11 +148,11 @@ struct pxa_i2c {
 	unsigned int		fast_mode :1;
 };
 
-#define _IBMR(i2c)	((i2c)->reg_base + (0x0 << (i2c)->reg_shift))
-#define _IDBR(i2c)	((i2c)->reg_base + (0x4 << (i2c)->reg_shift))
-#define _ICR(i2c)	((i2c)->reg_base + (0x8 << (i2c)->reg_shift))
-#define _ISR(i2c)	((i2c)->reg_base + (0xc << (i2c)->reg_shift))
-#define _ISAR(i2c)	((i2c)->reg_base + (0x10 << (i2c)->reg_shift))
+#define _IBMR(i2c)	((i2c)->reg_ibmr)
+#define _IDBR(i2c)	((i2c)->reg_idbr)
+#define _ICR(i2c)	((i2c)->reg_icr)
+#define _ISR(i2c)	((i2c)->reg_isr)
+#define _ISAR(i2c)	((i2c)->reg_isar)
 
 /*
  * I2C Slave mode address
@@ -1044,7 +1071,12 @@ static int i2c_pxa_probe(struct platform_device *dev)
 		ret = -EIO;
 		goto eremap;
 	}
-	i2c->reg_shift = REG_SHIFT(id->driver_data);
+
+	i2c->reg_ibmr = i2c->reg_base + pxa_reg_layout[id->driver_data].ibmr;
+	i2c->reg_idbr = i2c->reg_base + pxa_reg_layout[id->driver_data].idbr;
+	i2c->reg_icr = i2c->reg_base + pxa_reg_layout[id->driver_data].icr;
+	i2c->reg_isr = i2c->reg_base + pxa_reg_layout[id->driver_data].isr;
+	i2c->reg_isar = i2c->reg_base + pxa_reg_layout[id->driver_data].isar;
 
 	i2c->iobase = res->start;
 	i2c->iosize = resource_size(res);
-- 
1.7.3.2

[sodaville] [PATCH 1/6] i2c/pxa2xx: Don't touch ISAR on X86

[Ben Dooks]

On 04/12/10 18:22, Sebastian Andrzej Siewior wrote:
> * Sebastian Andrzej Siewior | 2010-12-03 19:17:04 [+0100]:
> 
>> Ben Dooks wrote:
>>>> +#ifndef CONFIG_X86
>>>>  	writel(i2c->slave_addr, _ISAR(i2c));
>>>> +#endif
>>
>>
>>> I'd prefer some way of changing based on either the device name (see
>>> some other drivers which bind on multiple names) to define things such
>>> as this, as well as possibly changing the register layout.
>>
>> Do you want me to also change the register access? This would be a
>> intrusive patch since I would have to touch every readl()/writel() line
>> in this file.
> I've been looking at the wrong code while writting this. Here are two
> variants. -variant2 containts the size using this patch. variant1 uses
> 
>  #define _IBMR(i2c)     ((i2c)->reg_base + pxa_reg_layout[(i2c)->layout].ibmr)
> 
> for the access.
> 
>     text    data     bss     dec     hex filename
>     3753      84       0    3837     efd i2c-pxa-org.o
>     4017      84       0    4101    1005 i2c-pxa-variant1.o
>     3525      84       0    3609     e19 i2c-pxa-variant2.o
> 
> Are you fine with this?
> 
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> ---
>  drivers/i2c/busses/i2c-pxa.c |   64 +++++++++++++++++++++++++++++++----------
>  1 files changed, 48 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
> index f4c19a9..29ff876 100644
> --- a/drivers/i2c/busses/i2c-pxa.c
> +++ b/drivers/i2c/busses/i2c-pxa.c
> @@ -38,17 +38,40 @@
>  #include <asm/irq.h>
>  #include <plat/i2c.h>
>  
> -/*
> - * I2C register offsets will be shifted 0 or 1 bit left, depending on
> - * different SoCs
> - */
> -#define REG_SHIFT_0	(0 << 0)
> -#define REG_SHIFT_1	(1 << 0)
> -#define REG_SHIFT(d)	((d) & 0x1)
> +
> +struct pxa_reg_layout {
> +	u32 ibmr;
> +	u32 idbr;
> +	u32 icr;
> +	u32 isr;
> +	u32 isar;
> +};
> +
> +enum pxa_i2c_types {
> +	REGS_PXA2XX,
> +	REGS_PXA3XX,
> +};
> +
> +static struct pxa_reg_layout pxa_reg_layout[] = {
> +	[REGS_PXA2XX] = {
> +		.ibmr =	0x00,
> +		.idbr =	0x10,
> +		.icr =	0x20,
> +		.isr =	0x30,
> +		.isar =	0x40,
> +
> +	}, [REGS_PXA3XX] = {
> +		.ibmr =	0x00,
> +		.idbr =	0x08,
> +		.icr =	0x10,
> +		.isr =	0x18,
> +		.isar =	0x20,
> +	},
> +};
>  
>  static const struct platform_device_id i2c_pxa_id_table[] = {
> -	{ "pxa2xx-i2c",		REG_SHIFT_1 },
> -	{ "pxa3xx-pwri2c",	REG_SHIFT_0 },
> +	{ "pxa2xx-i2c",		REGS_PXA2XX },
> +	{ "pxa3xx-pwri2c",	REGS_PXA3XX },
>  	{ },
>  };
>  MODULE_DEVICE_TABLE(platform, i2c_pxa_id_table);
> @@ -111,7 +134,11 @@ struct pxa_i2c {
>  	u32			icrlog[32];
>  
>  	void __iomem		*reg_base;
> -	unsigned int		reg_shift;
> +	void __iomem		*reg_ibmr;
> +	void __iomem		*reg_idbr;
> +	void __iomem		*reg_icr;
> +	void __iomem		*reg_isr;
> +	void __iomem		*reg_isar;
>  
>  	unsigned long		iobase;
>  	unsigned long		iosize;
> @@ -121,11 +148,11 @@ struct pxa_i2c {
>  	unsigned int		fast_mode :1;
>  };
>  
> -#define _IBMR(i2c)	((i2c)->reg_base + (0x0 << (i2c)->reg_shift))
> -#define _IDBR(i2c)	((i2c)->reg_base + (0x4 << (i2c)->reg_shift))
> -#define _ICR(i2c)	((i2c)->reg_base + (0x8 << (i2c)->reg_shift))
> -#define _ISR(i2c)	((i2c)->reg_base + (0xc << (i2c)->reg_shift))
> -#define _ISAR(i2c)	((i2c)->reg_base + (0x10 << (i2c)->reg_shift))
> +#define _IBMR(i2c)	((i2c)->reg_ibmr)
> +#define _IDBR(i2c)	((i2c)->reg_idbr)
> +#define _ICR(i2c)	((i2c)->reg_icr)
> +#define _ISR(i2c)	((i2c)->reg_isr)
> +#define _ISAR(i2c)	((i2c)->reg_isar)
>  
>  /*
>   * I2C Slave mode address
> @@ -1044,7 +1071,12 @@ static int i2c_pxa_probe(struct platform_device *dev)
>  		ret = -EIO;
>  		goto eremap;
>  	}
> -	i2c->reg_shift = REG_SHIFT(id->driver_data);
> +
> +	i2c->reg_ibmr = i2c->reg_base + pxa_reg_layout[id->driver_data].ibmr;
> +	i2c->reg_idbr = i2c->reg_base + pxa_reg_layout[id->driver_data].idbr;
> +	i2c->reg_icr = i2c->reg_base + pxa_reg_layout[id->driver_data].icr;
> +	i2c->reg_isr = i2c->reg_base + pxa_reg_layout[id->driver_data].isr;
> +	i2c->reg_isar = i2c->reg_base + pxa_reg_layout[id->driver_data].isar;
>  
>  	i2c->iobase = res->start;
>  	i2c->iosize = resource_size(res);

Ok, this seems to be looking good.

I'll hold this for a few days before a final decision. will add to -next
tomorrow.

[PATCH 3/6] i2c/pxa2xx: Add PCI support for PXA I2C controller

[Florian Fainelli]

Hello Sebastian,

On Thursday 02 December 2010 21:09:46 Sebastian Andrzej Siewior wrote:
> The Sodaville I2C controller is almost the same as found on PXA2xx. The
> difference:
> - the register are at a different spot
> - no slave support
> 
> The PCI probe code adds three platform devices which are probed then by
> the platform code.
> The X86 part also adds dummy clock defines because we don't have HW
> clock support.
> 
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
> ---
>  drivers/i2c/busses/Kconfig       |    7 +-
>  drivers/i2c/busses/Makefile      |    1 +
>  drivers/i2c/busses/i2c-pxa-pci.c |  177
> ++++++++++++++++++++++++++++++++++++++ drivers/i2c/busses/i2c-pxa.c     | 
>  23 +++++
>  4 files changed, 206 insertions(+), 2 deletions(-)
>  create mode 100644 drivers/i2c/busses/i2c-pxa-pci.c
> 
> diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
> index 3a6321c..9ee3e60 100644
> --- a/drivers/i2c/busses/Kconfig
> +++ b/drivers/i2c/busses/Kconfig
> @@ -525,15 +525,18 @@ config I2C_PNX
> 
>  config I2C_PXA
>  	tristate "Intel PXA2XX I2C adapter"
> -	depends on ARCH_PXA || ARCH_MMP
> +	depends on ARCH_PXA || ARCH_MMP || (X86_32 && PCI && OF)
>  	help
>  	  If you have devices in the PXA I2C bus, say yes to this option.
>  	  This driver can also be built as a module.  If so, the module
>  	  will be called i2c-pxa.
> 
> +config I2C_PXA_PCI
> +	def_bool I2C_PXA && X86_32 && PCI && OF
> +
>  config I2C_PXA_SLAVE
>  	bool "Intel PXA2XX I2C Slave comms support"
> -	depends on I2C_PXA
> +	depends on I2C_PXA && !X86_32
>  	help
>  	  Support I2C slave mode communications on the PXA I2C bus.  This
>  	  is necessary for systems where the PXA may be a target on the
> diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile
> index 84cb16a..78db2e3 100644
> --- a/drivers/i2c/busses/Makefile
> +++ b/drivers/i2c/busses/Makefile
> @@ -52,6 +52,7 @@ obj-$(CONFIG_I2C_PCA_PLATFORM)	+= i2c-pca-platform.o
>  obj-$(CONFIG_I2C_PMCMSP)	+= i2c-pmcmsp.o
>  obj-$(CONFIG_I2C_PNX)		+= i2c-pnx.o
>  obj-$(CONFIG_I2C_PXA)		+= i2c-pxa.o
> +obj-$(CONFIG_I2C_PXA_PCI)	+= i2c-pxa-pci.o
>  obj-$(CONFIG_I2C_S3C2410)	+= i2c-s3c2410.o
>  obj-$(CONFIG_I2C_S6000)		+= i2c-s6000.o
>  obj-$(CONFIG_I2C_SH7760)	+= i2c-sh7760.o
> diff --git a/drivers/i2c/busses/i2c-pxa-pci.c
> b/drivers/i2c/busses/i2c-pxa-pci.c new file mode 100644
> index 0000000..f7b74b9
> --- /dev/null
> +++ b/drivers/i2c/busses/i2c-pxa-pci.c
> @@ -0,0 +1,177 @@
> +/*
> + * The CE4100's I2C device is more or less the same one as found on PXA.
> + * It does not support slave mode, the register slightly moved. This PCI
> + * device provides three bars, every contains a single I2C controller.
> + */
> +#include <linux/pci.h>
> +#include <linux/platform_device.h>
> +#include <linux/i2c/pxa-i2c.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +
> +/*
> + * the number of bars is hardcoded because pci_select_bars() reports the
> + * wrong thing.
> + */
> +#define CE4100_PCI_I2C_DEVS	3

I am surprised of your comment about pci_select_bars, it works fine here on a 
CE4100 device, beware that it will report a bitmask of valid resources (7).

Changing it later would be quite simple anyway.

> +
> +struct ce4100_i2c_device {
> +	struct platform_device pdev;
> +	struct resource res[2];
> +	struct i2c_pxa_platform_data pdata;
> +};
> +
> +struct ce4100_devices {
> +	struct ce4100_i2c_device sd[CE4100_PCI_I2C_DEVS];
> +};
> +
> +static void plat_dev_release(struct device *dev)
> +{
> +	struct ce4100_i2c_device *sd = container_of(dev,
> +			struct ce4100_i2c_device, pdev.dev);
> +
> +	of_device_node_put(&sd->pdev.dev);
> +}
> +
> +static int add_i2c_device(struct pci_dev *dev, int bar,
> +		struct ce4100_i2c_device *sd)
> +{
> +	struct platform_device *pdev = &sd->pdev;
> +	struct i2c_pxa_platform_data *pdata = &sd->pdata;
> +	struct device_node *child;
> +	int found = 0;
> +
> +	pdev->name = "pxa2xx-i2c";
> +	pdev->dev.release = plat_dev_release;
> +	pdev->dev.parent = &dev->dev;
> +
> +	for_each_child_of_node(dev->dev.of_node, child) {
> +		const void *prop;
> +		u32 child_reg;
> +
> +		prop = of_get_property(child, "reg", NULL);
> +		if (!prop)
> +			continue;
> +		child_reg = be32_to_cpup(prop);
> +		if (child_reg != bar)
> +			continue;
> +
> +		pdev->dev.of_node = child;
> +
> +		prop = of_get_property(child, "fast-mode", NULL);
> +		if (prop)
> +			pdata->fast_mode = 1;
> +
> +		prop = of_get_property(child, "id", NULL);
> +		if (!prop)
> +			return -EINVAL;
> +
> +		pdev->id = be32_to_cpup(prop);
> +		found = 1;
> +		break;
> +	}
> +
> +	if (!found) {
> +		dev_err(&dev->dev, "Missing DT node for bar %d at %s\n", bar,
> +				dev->dev.of_node->full_name);
> +		return -EINVAL;
> +	}
> +
> +	pdev->dev.platform_data = pdata;
> +	pdev->resource = sd->res;
> +
> +	sd->res[0].flags = IORESOURCE_MEM;
> +	sd->res[0].start = pci_resource_start(dev, bar);
> +	sd->res[0].end = pci_resource_end(dev, bar);
> +
> +	sd->res[1].flags = IORESOURCE_IRQ;
> +	sd->res[1].start = dev->irq;
> +	sd->res[1].end = dev->irq;
> +
> +	pdev->num_resources = 2;
> +
> +	return platform_device_register(pdev);
> +}
> +
> +static int __devinit ce4100_i2c_probe(struct pci_dev *dev,
> +		const struct pci_device_id *ent)
> +{
> +	int ret;
> +	int i;
> +	struct ce4100_devices *sds;
> +
> +	ret = pci_enable_device_mem(dev);
> +	if (ret)
> +		return ret;
> +
> +	if (!dev->dev.of_node) {
> +		dev_err(&dev->dev, "Missing device tree node.\n");
> +		return -EINVAL;
> +	}
> +	sds = kzalloc(sizeof(*sds), GFP_KERNEL);
> +	if (!sds)
> +		goto err_mem;
> +
> +	pci_set_drvdata(dev, sds);
> +
> +	for (i = 0; i < ARRAY_SIZE(sds->sd); i++) {
> +		ret = add_i2c_device(dev, i, &sds->sd[i]);
> +		if (ret) {
> +			while (--i >= 0)
> +				platform_device_unregister(&sds->sd[i].pdev);
> +			goto err_dev_add;
> +		}
> +	}
> +	return 0;
> +
> +err_dev_add:
> +	pci_set_drvdata(dev, NULL);
> +	kfree(sds);
> +err_mem:
> +	pci_disable_device(dev);
> +	return ret;
> +}
> +
> +static void __devexit ce4100_i2c_remove(struct pci_dev *dev)
> +{
> +	struct ce4100_devices *sds;
> +	unsigned int i;
> +
> +	sds = pci_get_drvdata(dev);
> +	pci_set_drvdata(dev, NULL);
> +
> +	for (i = 0; i < ARRAY_SIZE(sds->sd); i++)
> +		platform_device_unregister(&sds->sd[i].pdev);
> +
> +	pci_disable_device(dev);
> +	kfree(sds);
> +}
> +
> +static struct pci_device_id ce4100_i2c_devices[] __devinitdata = {
> +	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2e68)},
> +	{ },
> +};
> +MODULE_DEVICE_TABLE(pci, ce4100_i2c_devices);
> +
> +static struct pci_driver ce4100_i2c_driver = {
> +	.name           = "ce4100_i2c",
> +	.id_table       = ce4100_i2c_devices,
> +	.probe          = ce4100_i2c_probe,
> +	.remove         = __devexit_p(ce4100_i2c_remove),
> +};
> +
> +static int __init ce4100_i2c_init(void)
> +{
> +	return pci_register_driver(&ce4100_i2c_driver);
> +}
> +module_init(ce4100_i2c_init);
> +
> +static void __exit ce4100_i2c_exit(void)
> +{
> +	pci_unregister_driver(&ce4100_i2c_driver);
> +}
> +module_exit(ce4100_i2c_exit);
> +
> +MODULE_DESCRIPTION("CE4100 PCI-I2C glue code for PXA's driver");
> +MODULE_LICENSE("GPL v2");
> +MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");
> diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
> index 667f6d9..32982fb 100644
> --- a/drivers/i2c/busses/i2c-pxa.c
> +++ b/drivers/i2c/busses/i2c-pxa.c
> @@ -88,6 +88,8 @@ MODULE_DEVICE_TABLE(platform, i2c_pxa_id_table);
>  /*
>   * I2C registers definitions
>   */
> +#ifndef CONFIG_X86
> +
>  #define IBMR		(0x00)
>  #define IDBR		(0x04)
>  #define ICR		(0x08)
> @@ -100,6 +102,27 @@ MODULE_DEVICE_TABLE(platform, i2c_pxa_id_table);
>  #define _ISR(i2c)	((i2c)->reg_base + (ISR << (i2c)->reg_shift))
>  #define _ISAR(i2c)	((i2c)->reg_base + (ISAR << (i2c)->reg_shift))
> 
> +#else
> +
> +#define IBMR            (0x14)
> +#define IDBR            (0x0c)
> +#define ICR             (0x00)
> +#define ISR             (0x04)
> +
> +#define _IBMR(i2c)	((i2c)->reg_base + IBMR)
> +#define _IDBR(i2c)	((i2c)->reg_base + IDBR)
> +#define _ICR(i2c)	((i2c)->reg_base + ICR)
> +#define _ISR(i2c)	((i2c)->reg_base + ISR)
> +
> +struct clk;
> +
> +#define clk_get(dev, id)	NULL
> +#define clk_put(clk)		do { } while (0)
> +#define clk_disable(clk)	do { } while (0)
> +#define clk_enable(clk)		do { } while (0)
> +
> +#endif
> +
>  struct pxa_i2c {
>  	spinlock_t		lock;
>  	wait_queue_head_t	wait;

[PATCH 3/6] i2c/pxa2xx: Add PCI support for PXA I2C controller

[Sebastian Andrzej Siewior]

Florian Fainelli wrote:
>> diff --git a/drivers/i2c/busses/i2c-pxa-pci.c
>> b/drivers/i2c/busses/i2c-pxa-pci.c new file mode 100644
>> index 0000000..f7b74b9
>> --- /dev/null
>> +++ b/drivers/i2c/busses/i2c-pxa-pci.c
>> +
>> +/*
>> + * the number of bars is hardcoded because pci_select_bars() reports the
>> + * wrong thing.
>> + */
>> +#define CE4100_PCI_I2C_DEVS	3
> 
> I am surprised of your comment about pci_select_bars, it works fine here on a 
> CE4100 device, beware that it will report a bitmask of valid resources (7).
> 
> Changing it later would be quite simple anyway.

yep, my bad. I removed the comment and we can make it fully dynamic once
it is required.

Sebastian