Skip to contentSkip to conversation

I2C support for CE4100, v3

PATCH New Sebastian Andrzej Siewior 4 participants 11 messages Feb 23, 2011 – Mar 2, 2011

Subsystems (5)
Arm (32-bit) Arm sub-architectures I2C subsystem host drivers PXA2xx/PXA3xx support +1 more subsystems
lore
Share & tools
lore

Sebastian Andrzej Siewior

author
#0 lore raw

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.

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.
v3: - rebased against v2.6.38-rc3, fixed conflicts in ARM tree
- the dependency on SPI is gone.

Sebastian

author
#1 lore raw

PATCH 1/6 i2c-pxa2xx: use dynamic register layout

This will prepare the driver to handle register layouts where certain registers are not available at all.

Signed-off-by Sebastian Andrzej Siewior <[email protected]>
---
 drivers/i2c/busses/i2c-pxa.c |   70 ++++++++++++++++++++++++++++++------------
 1 files changed, 50 insertions(+), 20 deletions(-)
drivers/i2c/busses/i2c-pxa.c +50 -20
index f4c19a9..a011455 100644
@@ -38,29 +38,49 @@
 #include <asm/irq.h>
 #include <plat/i2c.h>
 
+struct pxa_reg_layout {
+	u32 ibmr;
+	u32 idbr;
+	u32 icr;
+	u32 isr;
+	u32 isar;
+};
+
+enum pxa_i2c_types {
+	REGS_PXA2XX,
+	REGS_PXA3XX,
+};
+
 /*
- * I2C register offsets will be shifted 0 or 1 bit left, depending on
- * different SoCs
+ * I2C registers definitions
  */
-#define REG_SHIFT_0	(0 << 0)
-#define REG_SHIFT_1	(1 << 0)
-#define REG_SHIFT(d)	((d) & 0x1)
+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);
 
 /*
- * 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 */

@@ -111,7 +131,11 @@ 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 +145,11 @@ 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

@@ -1001,6 +1025,7 @@ static int i2c_pxa_probe(struct platform_device *dev)
 	struct resource *res;
 	struct i2c_pxa_platform_data *plat = dev->dev.platform_data;
 	const struct platform_device_id *id = platform_get_device_id(dev);
+	enum pxa_i2c_types i2c_type = id->driver_data;
 	int ret;
 	int irq;
 

@@ -1044,7 +1069,12 @@ 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[i2c_type].ibmr;
+	i2c->reg_idbr = i2c->reg_base + pxa_reg_layout[i2c_type].idbr;
+	i2c->reg_icr = i2c->reg_base + pxa_reg_layout[i2c_type].icr;
+	i2c->reg_isr = i2c->reg_base + pxa_reg_layout[i2c_type].isr;
+	i2c->reg_isar = i2c->reg_base + pxa_reg_layout[i2c_type].isar;
 
 	i2c->iobase = res->start;
 	i2c->iosize = resource_size(res);
Signature · 1 line
1.7.4
author
#2 lore raw

PATCH 2/6 ARM: pxa2xx: reorganize I2C files

In reply to Sebastian Andrzej Siewior

This patch moves the platform data definition from arch/arm/plat-pxa/include/plat/i2c.h to include/linux/i2c/pxa-i2c.h so it can be accessed from x86 the same way as on ARM.

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 <[email protected]>
Signed-off-by Dirk Brandewie <[email protected]>
---
 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-evalboard.c              |    3 +--
 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                         |    3 +--
 arch/arm/mach-pxa/pxa3xx.c                         |    2 +-
 arch/arm/mach-pxa/pxa95x.c                         |    2 +-
 arch/arm/mach-pxa/raumfeld.c                       |    2 +-
 arch/arm/mach-pxa/saar.c                           |    2 +-
 arch/arm/mach-pxa/saarb.c                          |    3 +--
 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                       |    2 +-
 .../plat/i2c.h => include/linux/i2c/pxa-i2c.h      |    0
 40 files changed, 39 insertions(+), 51 deletions(-)
 rename arch/arm/plat-pxa/include/plat/i2c.h => include/linux/i2c/pxa-i2c.h (100%)
arch/arm/mach-mmp/include/mach/mmp2.h +1 -1
index 4aec493..2cbf6df 100644
@@ -11,8 +11,8 @@ 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;
arch/arm/mach-mmp/include/mach/pxa168.h +1 -1
index 1801e42..a52b3d2 100644
@@ -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>
arch/arm/mach-mmp/include/mach/pxa910.h +1 -1
index f13c49d..91be755 100644
@@ -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;
arch/arm/mach-pxa/balloon3.c +1 -2
index a134a14..f1d4824 100644
@@ -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"
arch/arm/mach-pxa/cm-x300.c +1 -1
index 7984268..bfca7ed 100644
@@ -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>
arch/arm/mach-pxa/colibri-evalboard.c +1 -2
index 6b2c800..2adabbf 100644
@@ -20,6 +20,7 @@
 #include <mach/hardware.h>
 #include <asm/mach/arch.h>
 #include <linux/i2c.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <mach/pxa27x.h>
 #include <mach/colibri.h>

@@ -27,8 +28,6 @@
 #include <mach/ohci.h>
 #include <mach/pxa27x-udc.h>
 
-#include <plat/i2c.h>
-
 #include "generic.h"
 #include "devices.h"
arch/arm/mach-pxa/colibri-pxa270-income.c +1 -2
index 07b62a0..ee79739 100644
@@ -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"
arch/arm/mach-pxa/corgi.c +1 -1
index a5452a3..d4e705c 100644
@@ -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>
arch/arm/mach-pxa/csb726.c +1 -1
index a305424..0481c29 100644
@@ -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>
arch/arm/mach-pxa/devices.c +1 -1
index 4c766e3..c4bf08b 100644
@@ -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"
arch/arm/mach-pxa/em-x270.c +1 -1
index a78bb30..b411d7c 100644
@@ -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"
arch/arm/mach-pxa/ezx.c +1 -1
index 87cec0a..93f05e0 100644
@@ -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>
arch/arm/mach-pxa/hx4700.c +1 -1
index a908e0a..6de0ad0 100644
@@ -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>
arch/arm/mach-pxa/littleton.c +1 -1
index ccb7bfa..87c1ed9 100644
@@ -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"
arch/arm/mach-pxa/magician.c +1 -1
index 41198f0..5535991 100644
@@ -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>
arch/arm/mach-pxa/mainstone.c +1 -1
index d4b6f23..f954222 100644
@@ -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>
arch/arm/mach-pxa/mioa701.c +1 -1
index faafea3..78d98a8 100644
@@ -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>
arch/arm/mach-pxa/mxm8x10.c +1 -1
index cdf7f41..b5a8fd3 100644
@@ -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>
arch/arm/mach-pxa/palm27x.c +1 -2
index 405b92a..ad077e8 100644
@@ -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"
arch/arm/mach-pxa/pcm990-baseboard.c +1 -1
index 90820fa..9dbf3cc 100644
@@ -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>
arch/arm/mach-pxa/poodle.c +1 -1
index 4f0ff1a..35353af 100644
@@ -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>
arch/arm/mach-pxa/pxa27x.c +1 -2
index 987301f..9845bd9 100644
@@ -19,6 +19,7 @@
 #include <linux/sysdev.h>
 #include <linux/io.h>
 #include <linux/irq.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <asm/mach/map.h>
 #include <mach/hardware.h>

@@ -32,8 +33,6 @@
 #include <mach/dma.h>
 #include <mach/smemc.h>
 
-#include <plat/i2c.h>
-
 #include "generic.h"
 #include "devices.h"
 #include "clock.h"
arch/arm/mach-pxa/pxa3xx.c +1 -1
index a7a19e1..e748d9c 100644
@@ -21,6 +21,7 @@
 #include <linux/irq.h>
 #include <linux/io.h>
 #include <linux/sysdev.h>
+#include <linux/i2c/pxa-i2c.h>
 
 #include <asm/mach/map.h>
 #include <mach/hardware.h>

@@ -32,7 +33,6 @@
 #include <mach/dma.h>
 #include <mach/regs-intc.h>
 #include <mach/smemc.h>
-#include <plat/i2c.h>
 
 #include "generic.h"
 #include "devices.h"
arch/arm/mach-pxa/pxa95x.c +1 -1
index 437980f..23b229b 100644
@@ -15,6 +15,7 @@
 #include <linux/init.h>
 #include <linux/pm.h>
 #include <linux/platform_device.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <linux/irq.h>
 #include <linux/io.h>
 #include <linux/sysdev.h>

@@ -27,7 +28,6 @@
 #include <mach/pm.h>
 #include <mach/dma.h>
 #include <mach/regs-intc.h>
-#include <plat/i2c.h>
 
 #include "generic.h"
 #include "devices.h"
arch/arm/mach-pxa/raumfeld.c +1 -1
index 8361151..4709418 100644
@@ -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"
arch/arm/mach-pxa/saar.c +1 -1
index c1ca8cb..eb83c89 100644
@@ -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"
arch/arm/mach-pxa/saarb.c +1 -2
index e497922..9322fe5 100644
@@ -13,6 +13,7 @@
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/i2c.h>
+#include <linux/i2c/pxa-i2c.h>
 #include <linux/mfd/88pm860x.h>
 
 #include <asm/mach-types.h>

@@ -24,8 +25,6 @@
 #include <mach/mfp-pxa930.h>
 #include <mach/gpio.h>
 
-#include <plat/i2c.h>
-
 #include "generic.h"
 
 #define SAARB_NR_IRQS	(IRQ_BOARD_START + 40)
arch/arm/mach-pxa/spitz.c +1 -2
index b49a2c2..38e2c09 100644
@@ -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>

@@ -47,8 +48,6 @@
 #include <mach/sharpsl_pm.h>
 #include <mach/smemc.h>
 
-#include <plat/i2c.h>
-
 #include "generic.h"
 #include "devices.h"
arch/arm/mach-pxa/stargate2.c +1 -1
index 9a14fdb..cb5611d 100644
@@ -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>
arch/arm/mach-pxa/tavorevb3.c +1 -2
index 70191a9..79f4422 100644
@@ -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"
arch/arm/mach-pxa/tosa.c +1 -1
index af152e7..2de1492 100644
@@ -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>
arch/arm/mach-pxa/trizeps4.c +1 -1
index 423261d..857bb2e 100644
@@ -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>

@@ -47,7 +48,6 @@
 #include <mach/irda.h>
 #include <mach/ohci.h>
 #include <mach/smemc.h>
-#include <plat/i2c.h>
 
 #include "generic.h"
 #include "devices.h"
arch/arm/mach-pxa/viper.c +1 -1
index 49eeeab..1227921 100644
@@ -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>
arch/arm/mach-pxa/vpac270.c +1 -2
index b9b5797..e709fd4 100644
@@ -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"
arch/arm/mach-pxa/xcep.c +1 -2
index 51c0281..f55f8f2 100644
@@ -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>
arch/arm/mach-pxa/z2.c +1 -2
index a323e07..aaf8837 100644
@@ -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"
arch/arm/mach-pxa/zeus.c +1 -2
index f4b053b..0bc99ac 100644
@@ -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>
arch/arm/mach-pxa/zylonite_pxa300.c +1 -1
index 3aa73b3..93c64d8 100644
@@ -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"
drivers/i2c/busses/i2c-pxa.c +1 -1
index a011455..fc2a90e 100644
@@ -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>
 
 struct pxa_reg_layout {
 	u32 ibmr;
include/linux/i2c/pxa-i2c.h renamed from arch/arm/plat-pxa/include/plat/i2c.h +0 -0
similarity index 100%
rename from arch/arm/plat-pxa/include/plat/i2c.h
rename to include/linux/i2c/pxa-i2c.h
Signature · 1 line
1.7.4
#3 lore raw

PATCH 2/6 ARM: pxa2xx: reorganize I2C files

Quoted 11 lines · Sebastian Andrzej Siewior

This patch moves the platform data definition from arch/arm/plat-pxa/include/plat/i2c.h to include/linux/i2c/pxa-i2c.h so it can be accessed from x86 the same way as on ARM.

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

Russell/others, you OK with this going through my tree?

#4 lore raw

PATCH 2/6 ARM: pxa2xx: reorganize I2C files

Quoted 14 lines · Ben Dooks
Quoted 5 lines · Sebastian Andrzej Siewior

This patch moves the platform data definition from arch/arm/plat-pxa/include/plat/i2c.h to include/linux/i2c/pxa-i2c.h so it can be accessed from x86 the same way as on ARM.

Quoted 7 lines

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

Quoted 2 lines

Russell/others, you OK with this going through my tree?

Ben, I'm fine that you take this change. Trivial changes to me, so I expect no significant merge conflicts.

author
#5 lore raw

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

In reply to Sebastian Andrzej Siewior

The Sodaville I2C controller is almost the same as found on PXA2xx. The difference:
- the register are at a different offset
- 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 <[email protected]>
Signed-off-by Dirk Brandewie <[email protected]>
---
 drivers/i2c/busses/Kconfig       |    7 +-
 drivers/i2c/busses/Makefile      |    1 +
 drivers/i2c/busses/i2c-pxa-pci.c |  176 ++++++++++++++++++++++++++++++++++++++
 drivers/i2c/busses/i2c-pxa.c     |   27 +++++-
 4 files changed, 206 insertions(+), 5 deletions(-)
 create mode 100644 drivers/i2c/busses/i2c-pxa-pci.c
drivers/i2c/busses/Kconfig +5 -2
index 113505a..deefa13 100644
@@ -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
drivers/i2c/busses/Makefile +1 -0
index 9d2d0ec..e95d0bf 100644
@@ -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
drivers/i2c/busses/i2c-pxa-pci.c new file +176 -0

176 lines not on this page · raw message

drivers/i2c/busses/i2c-pxa.c +24 -3
index fc2a90e..225e9a5 100644
@@ -38,6 +38,13 @@
 
 #include <asm/irq.h>
 
+#ifdef CONFIG_X86
+#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_reg_layout {
 	u32 ibmr;
 	u32 idbr;

@@ -49,6 +56,7 @@ struct pxa_reg_layout {
 enum pxa_i2c_types {
 	REGS_PXA2XX,
 	REGS_PXA3XX,
+	REGS_CE4100,
 };
 
 /*

@@ -69,11 +77,19 @@ static struct pxa_reg_layout pxa_reg_layout[] = {
 		.isr =	0x18,
 		.isar =	0x20,
 	},
+	[REGS_CE4100] = {
+		.ibmr =	0x14,
+		.idbr =	0x0c,
+		.icr =	0x00,
+		.isr =	0x04,
+		/* no isar register */
+	},
 };
 
 static const struct platform_device_id i2c_pxa_id_table[] = {
 	{ "pxa2xx-i2c",		REGS_PXA2XX },
 	{ "pxa3xx-pwri2c",	REGS_PXA3XX },
+	{ "ce4100-i2c",		REGS_CE4100 },
 	{ },
 };
 MODULE_DEVICE_TABLE(platform, i2c_pxa_id_table);

@@ -442,7 +458,8 @@ static void i2c_pxa_reset(struct pxa_i2c *i2c)
 	writel(I2C_ISR_INIT, _ISR(i2c));
 	writel(readl(_ICR(i2c)) & ~ICR_UR, _ICR(i2c));
 
-	writel(i2c->slave_addr, _ISAR(i2c));
+	if (i2c->reg_isar)
+		writel(i2c->slave_addr, _ISAR(i2c));
 
 	/* set control register values */
 	writel(I2C_ICR_INIT | (i2c->fast_mode ? ICR_FM : 0), _ICR(i2c));

@@ -1074,7 +1091,8 @@ static int i2c_pxa_probe(struct platform_device *dev)
 	i2c->reg_idbr = i2c->reg_base + pxa_reg_layout[i2c_type].idbr;
 	i2c->reg_icr = i2c->reg_base + pxa_reg_layout[i2c_type].icr;
 	i2c->reg_isr = i2c->reg_base + pxa_reg_layout[i2c_type].isr;
-	i2c->reg_isar = i2c->reg_base + pxa_reg_layout[i2c_type].isar;
+	if (i2c_type != REGS_CE4100)
+		i2c->reg_isar = i2c->reg_base + pxa_reg_layout[i2c_type].isar;
 
 	i2c->iobase = res->start;
 	i2c->iosize = resource_size(res);

@@ -1113,7 +1131,10 @@ static int i2c_pxa_probe(struct platform_device *dev)
 	i2c->adap.algo_data = i2c;
 	i2c->adap.dev.parent = &dev->dev;
 
-	ret = i2c_add_numbered_adapter(&i2c->adap);
+	if (i2c_type == REGS_CE4100)
+		ret = i2c_add_adapter(&i2c->adap);
+	else
+		ret = i2c_add_numbered_adapter(&i2c->adap);
 	if (ret < 0) {
 		printk(KERN_INFO "I2C: Failed to add bus\n");
 		goto eadapt;
Signature · 1 line
1.7.4
#6 lore raw

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

Quoted 244 lines · Sebastian Andrzej Siewior

The Sodaville I2C controller is almost the same as found on PXA2xx. The difference:
- the register are at a different offset
- 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<[email protected]>
Signed-off-by Dirk Brandewie<[email protected]>
---
  drivers/i2c/busses/Kconfig       |    7 +-
  drivers/i2c/busses/Makefile      |    1 +
  drivers/i2c/busses/i2c-pxa-pci.c |  176 ++++++++++++++++++++++++++++++++++++++
  drivers/i2c/busses/i2c-pxa.c     |   27 +++++-
  4 files changed, 206 insertions(+), 5 deletions(-)

create mode 100644 drivers/i2c/busses/i2c-pxa-pci.c

drivers/i2c/busses/Kconfig +5 -2
index 113505a..deefa13 100644
@@ -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
drivers/i2c/busses/Makefile +1 -0
index 9d2d0ec..e95d0bf 100644
@@ -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
drivers/i2c/busses/i2c-pxa-pci.c new file +176 -0
new file mode 100644
index 0000000..6659d26
@@ -0,0 +1,176 @@
+/*
+ * 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>
+#include<linux/of_address.h>
+
+#define CE4100_PCI_I2C_DEVS	3
+
+struct ce4100_devices {
+	struct platform_device *pdev[CE4100_PCI_I2C_DEVS];
+};
+
+static struct platform_device *add_i2c_device(struct pci_dev *dev, int bar)
+{
+	struct platform_device *pdev;
+	struct i2c_pxa_platform_data pdata;
+	struct resource res[2];
+	struct device_node *child;
+	static int devnum;
+	int ret;
+
+	memset(&pdata, 0, sizeof(struct i2c_pxa_platform_data));
+	memset(&res, 0, sizeof(res));
+
+	res[0].flags = IORESOURCE_MEM;
+	res[0].start = pci_resource_start(dev, bar);
+	res[0].end = pci_resource_end(dev, bar);
+
+	res[1].flags = IORESOURCE_IRQ;
+	res[1].start = dev->irq;
+	res[1].end = dev->irq;
+
+	for_each_child_of_node(dev->dev.of_node, child) {
+		const void *prop;
+		struct resource r;
+		int ret;
+
+		ret = of_address_to_resource(child, 0,&r);
+		if (ret<  0)
+			continue;
+		if (r.start != res[0].start)
+			continue;
+		if (r.end != res[0].end)
+			continue;
+		if (r.flags != res[0].flags)
+			continue;
+
+		prop = of_get_property(child, "fast-mode", NULL);
+		if (prop)
+			pdata.fast_mode = 1;
+
+		break;
+	}
+
+	if (!child) {
+		dev_err(&dev->dev, "failed to match a DT node for bar %d.\n",
+				bar);
+		ret = -EINVAL;
+		goto out;
+	}
+
+	pdev = platform_device_alloc("ce4100-i2c", devnum);
+	if (!pdev) {
+		of_node_put(child);
+		ret = -ENOMEM;
+		goto out;
+	}
+	pdev->dev.parent =&dev->dev;
+	pdev->dev.of_node = child;
+
+	ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
+	if (ret)
+		goto err;
+
+	ret = platform_device_add_data(pdev,&pdata, sizeof(pdata));
+	if (ret)
+		goto err;
+
+	ret = platform_device_add(pdev);
+	if (ret)
+		goto err;
+	devnum++;
+	return pdev;
+err:
+	platform_device_put(pdev);
+out:
+	return ERR_PTR(ret);
+}
+
+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;
+
+	for (i = 0; i<  ARRAY_SIZE(sds->pdev); i++) {
+		sds->pdev[i] = add_i2c_device(dev, i);
+		if (IS_ERR(sds->pdev[i])) {
+			while (--i>= 0)
+				platform_device_unregister(sds->pdev[i]);
+			goto err_dev_add;
+		}
+	}
+	pci_set_drvdata(dev, sds);
+	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->pdev); i++)
+		platform_device_unregister(sds->pdev[i]);
+
+	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<[email protected]>");
drivers/i2c/busses/i2c-pxa.c +0 -0
index fc2a90e..225e9a5 100644

drivers/i2c/busses/i2c-pxa.c line 47

Quoted 10 lines
drivers/i2c/busses/i2c-pxa.c +7 -0
@@ -38,6 +38,13 @@
 
  #include<asm/irq.h>
 
+#ifdef CONFIG_X86
+#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
+

Maybe be better on !CONFIG_HAVE_CLOCK (or whatever it is called)

Quoted 63 lines
drivers/i2c/busses/i2c-pxa.c +17 -3
  struct pxa_reg_layout {
  	u32 ibmr;
  	u32 idbr;

@@ -49,6 +56,7 @@ struct pxa_reg_layout {
  enum pxa_i2c_types {
  	REGS_PXA2XX,
  	REGS_PXA3XX,
+	REGS_CE4100,
  };
 
  /*

@@ -69,11 +77,19 @@ static struct pxa_reg_layout pxa_reg_layout[] = {
  		.isr =	0x18,
  		.isar =	0x20,
  	},
+	[REGS_CE4100] = {
+		.ibmr =	0x14,
+		.idbr =	0x0c,
+		.icr =	0x00,
+		.isr =	0x04,
+		/* no isar register */
+	},
  };
 
  static const struct platform_device_id i2c_pxa_id_table[] = {
  	{ "pxa2xx-i2c",		REGS_PXA2XX },
  	{ "pxa3xx-pwri2c",	REGS_PXA3XX },
+	{ "ce4100-i2c",		REGS_CE4100 },
  	{ },
  };
  MODULE_DEVICE_TABLE(platform, i2c_pxa_id_table);

@@ -442,7 +458,8 @@ static void i2c_pxa_reset(struct pxa_i2c *i2c)
  	writel(I2C_ISR_INIT, _ISR(i2c));
  	writel(readl(_ICR(i2c))&  ~ICR_UR, _ICR(i2c));
 
-	writel(i2c->slave_addr, _ISAR(i2c));
+	if (i2c->reg_isar)
+		writel(i2c->slave_addr, _ISAR(i2c));
 
  	/* set control register values */
  	writel(I2C_ICR_INIT | (i2c->fast_mode ? ICR_FM : 0), _ICR(i2c));

@@ -1074,7 +1091,8 @@ static int i2c_pxa_probe(struct platform_device *dev)
  	i2c->reg_idbr = i2c->reg_base + pxa_reg_layout[i2c_type].idbr;
  	i2c->reg_icr = i2c->reg_base + pxa_reg_layout[i2c_type].icr;
  	i2c->reg_isr = i2c->reg_base + pxa_reg_layout[i2c_type].isr;
-	i2c->reg_isar = i2c->reg_base + pxa_reg_layout[i2c_type].isar;
+	if (i2c_type != REGS_CE4100)
+		i2c->reg_isar = i2c->reg_base + pxa_reg_layout[i2c_type].isar;
 
  	i2c->iobase = res->start;
  	i2c->iosize = resource_size(res);

@@ -1113,7 +1131,10 @@ static int i2c_pxa_probe(struct platform_device *dev)
  	i2c->adap.algo_data = i2c;
  	i2c->adap.dev.parent =&dev->dev;
 
-	ret = i2c_add_numbered_adapter(&i2c->adap);
+	if (i2c_type == REGS_CE4100)
+		ret = i2c_add_adapter(&i2c->adap);
+	else
+		ret = i2c_add_numbered_adapter(&i2c->adap);
  	if (ret<  0) {
  		printk(KERN_INFO "I2C: Failed to add bus\n");
  		goto eadapt;
author
#7 lore raw

PATCH v2 1/1 i2c-pxa2xx: Add PCI support for PXA I2C controller

The Sodaville I2C controller is almost the same as found on PXA2xx. The difference:
- the register are at a different offset
- 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 <[email protected]>
Signed-off-by Dirk Brandewie <[email protected]>

---

Quoted 8 lines · * Ben Dooks | 2011-03-02 00:51:12 [+0000]:
Quoted 8 lines
drivers/i2c/busses/i2c-pxa.c +0 -0
index fc2a90e..225e9a5 100644
@@ -38,6 +38,13 @@
 
 #include<asm/irq.h>
Quoted 9 lines

drivers/i2c/busses/i2c-pxa.c line 47

Quoted 7 lines
drivers/i2c/busses/i2c-pxa.c +7 -0
+#ifdef CONFIG_X86
+#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
+

Maybe be better on !CONFIG_HAVE_CLOCK (or whatever it is called)

Switched to #ifndef CONFIG_HAVE_CLK

 drivers/i2c/busses/Kconfig       |    7 +-
 drivers/i2c/busses/Makefile      |    1 +
 drivers/i2c/busses/i2c-pxa-pci.c |  176 ++++++++++++++++++++++++++++++++++++++
 drivers/i2c/busses/i2c-pxa.c     |   27 +++++-
 4 files changed, 206 insertions(+), 5 deletions(-)
 create mode 100644 drivers/i2c/busses/i2c-pxa-pci.c
drivers/i2c/busses/Kconfig +5 -2
index 113505a..deefa13 100644
@@ -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
drivers/i2c/busses/Makefile +1 -0
index 9d2d0ec..e95d0bf 100644
@@ -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
drivers/i2c/busses/i2c-pxa-pci.c new file +176 -0

176 lines not on this page · raw message

drivers/i2c/busses/i2c-pxa.c +24 -3
index fc2a90e..ab59b7e 100644
@@ -38,6 +38,13 @@
 
 #include <asm/irq.h>
 
+#ifndef CONFIG_HAVE_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_reg_layout {
 	u32 ibmr;
 	u32 idbr;

@@ -49,6 +56,7 @@ struct pxa_reg_layout {
 enum pxa_i2c_types {
 	REGS_PXA2XX,
 	REGS_PXA3XX,
+	REGS_CE4100,
 };
 
 /*

@@ -69,11 +77,19 @@ static struct pxa_reg_layout pxa_reg_layout[] = {
 		.isr =	0x18,
 		.isar =	0x20,
 	},
+	[REGS_CE4100] = {
+		.ibmr =	0x14,
+		.idbr =	0x0c,
+		.icr =	0x00,
+		.isr =	0x04,
+		/* no isar register */
+	},
 };
 
 static const struct platform_device_id i2c_pxa_id_table[] = {
 	{ "pxa2xx-i2c",		REGS_PXA2XX },
 	{ "pxa3xx-pwri2c",	REGS_PXA3XX },
+	{ "ce4100-i2c",		REGS_CE4100 },
 	{ },
 };
 MODULE_DEVICE_TABLE(platform, i2c_pxa_id_table);

@@ -442,7 +458,8 @@ static void i2c_pxa_reset(struct pxa_i2c *i2c)
 	writel(I2C_ISR_INIT, _ISR(i2c));
 	writel(readl(_ICR(i2c)) & ~ICR_UR, _ICR(i2c));
 
-	writel(i2c->slave_addr, _ISAR(i2c));
+	if (i2c->reg_isar)
+		writel(i2c->slave_addr, _ISAR(i2c));
 
 	/* set control register values */
 	writel(I2C_ICR_INIT | (i2c->fast_mode ? ICR_FM : 0), _ICR(i2c));

@@ -1074,7 +1091,8 @@ static int i2c_pxa_probe(struct platform_device *dev)
 	i2c->reg_idbr = i2c->reg_base + pxa_reg_layout[i2c_type].idbr;
 	i2c->reg_icr = i2c->reg_base + pxa_reg_layout[i2c_type].icr;
 	i2c->reg_isr = i2c->reg_base + pxa_reg_layout[i2c_type].isr;
-	i2c->reg_isar = i2c->reg_base + pxa_reg_layout[i2c_type].isar;
+	if (i2c_type != REGS_CE4100)
+		i2c->reg_isar = i2c->reg_base + pxa_reg_layout[i2c_type].isar;
 
 	i2c->iobase = res->start;
 	i2c->iosize = resource_size(res);

@@ -1113,7 +1131,10 @@ static int i2c_pxa_probe(struct platform_device *dev)
 	i2c->adap.algo_data = i2c;
 	i2c->adap.dev.parent = &dev->dev;
 
-	ret = i2c_add_numbered_adapter(&i2c->adap);
+	if (i2c_type == REGS_CE4100)
+		ret = i2c_add_adapter(&i2c->adap);
+	else
+		ret = i2c_add_numbered_adapter(&i2c->adap);
 	if (ret < 0) {
 		printk(KERN_INFO "I2C: Failed to add bus\n");
 		goto eadapt;
Signature · 4 lines
1.7.4


Sebastian
author
#8 lore raw

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

In reply to 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 <[email protected]>
Signed-off-by Dirk Brandewie <[email protected]>
---
 drivers/i2c/busses/i2c-pxa.c |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)
drivers/i2c/busses/i2c-pxa.c +8 -2
index 225e9a5..e566f8c 100644
@@ -956,11 +956,17 @@ 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)));

@@ -975,7 +981,7 @@ 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);

@@ -1120,7 +1126,7 @@ 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;
Signature · 1 line
1.7.4
author
#9 lore raw

PATCH 5/6 i2c-pxa2xx: check timeout correctly

In reply to 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 <[email protected]>
Signed-off-by Dirk Brandewie <[email protected]>
---
 drivers/i2c/busses/i2c-pxa.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
drivers/i2c/busses/i2c-pxa.c +3 -1
index e566f8c..bfd115d 100644
@@ -770,8 +770,10 @@ 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;
Signature · 1 line
1.7.4
author
#10 lore raw

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

In reply to 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 <[email protected]>
Signed-off-by Dirk Brandewie <[email protected]>
---
 drivers/i2c/busses/i2c-pxa.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
drivers/i2c/busses/i2c-pxa.c +5 -0
index bfd115d..a90739b 100644
@@ -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>

@@ -1138,6 +1139,9 @@ 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
 
 	if (i2c_type == REGS_CE4100)
 		ret = i2c_add_adapter(&i2c->adap);

@@ -1147,6 +1151,7 @@ static int i2c_pxa_probe(struct platform_device *dev)
 		printk(KERN_INFO "I2C: Failed to add bus\n");
 		goto eadapt;
 	}
+	of_i2c_register_devices(&i2c->adap);
 
 	platform_set_drvdata(dev, i2c);
Signature · 1 line
1.7.4