i2c: adds support for i2c bus on Frescale CPM1/CPM2 controllers

Using the port of 2.4 code from Vitaly Bordug <[email protected]> and the actual algorithm used by the i2c driver of the DBox code on cvs.tuxboc.org from Tmbinc, Gillem ([email protected]). Renamed i2c-rpx.c and i2c-algo-8xx.c to i2c-cpm.c and converted the driver to an of_platform_driver.

---

arch/powerpc/boot/dts/mpc8272ads.dts         |   10 +
arch/powerpc/boot/dts/mpc866ads.dts          |   10 +
arch/powerpc/boot/dts/mpc885ads.dts          |   10 +
arch/powerpc/platforms/8xx/mpc885ads_setup.c |    5 +
drivers/i2c/busses/Kconfig                   |   10 +
drivers/i2c/busses/Makefile                  |    1 +
drivers/i2c/busses/i2c-cpm.c                 |  757 ++++++++++++++++++++++++++
7 files changed, 803 insertions(+), 0 deletions(-)

create mode 100644 drivers/i2c/busses/i2c-cpm.c

index 7285ca1..7273996 100644
@@ -215,6 +215,16 @@

				linux,network-index = <1>;
				fsl,cpm-command = <16200300>;
			};

+
+ i2c@11860 {
+ compatible = "fsl,mpc8248-i2c",
+ "fsl,cpm2-i2c",
+ "fsl,cpm-i2c";
+ reg = <11860 20 8afc 2>;
+ interrupts = <1 8>;
+ interrupt-parent = <&PIC>;
+ fsl,cpm-command = <29600000>;

+			};
		};

		PIC: interrupt-controller@10c00 {

index 90f2293..c79cac1 100644
@@ -141,6 +141,16 @@

				interrupts = <1e 3>;
				interrupt-parent = <&Cpm_pic>;
			};

+
+ i2c@860 {
+ compatible = "fsl,mpc866-i2c",
+ "fsl,cpm1-i2c",
+ "fsl,cpm-i2c";
+ reg = <860 20 3c80 30>;
+ interrupts = <10 3>;
+ interrupt-parent = <&Cpm_pic>;
+ fsl,cpm-command = <0010>;

+			};
		};
	};
};

index 8848e63..fd9c9d7 100644
@@ -213,6 +213,16 @@

				fsl,cpm-command = <0080>;
				linux,network-index = <2>;
			};

+
+ i2c@860 {
+ compatible = "fsl,mpc885-i2c",
+ "fsl,cpm1-i2c",
+ "fsl,cpm-i2c";
+ reg = <860 20 3c80 30>;
+ interrupts = <10>;
+ interrupt-parent = <&CPM_PIC>;
+ fsl,cpm-command = <0010>;

+			};
		};
	};

index 2cf1b6a..4377521 100644
@@ -157,6 +157,11 @@ static struct cpm_pin mpc885ads_pins[] = {

	{CPM_PORTE, 28, CPM_PIN_OUTPUT},
	{CPM_PORTE, 29, CPM_PIN_OUTPUT},

#endif
+ /* I2C */
+#ifdef CONFIG_I2C_8XX
+ {CPM_PORTB, 26, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
+ {CPM_PORTB, 27, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
+#endif
};

static void __init init_ioports(void)

index c466c6c..5950172 100644
@@ -114,6 +114,16 @@ config I2C_BLACKFIN_TWI_CLK_KHZ

help
The unit of the TWI clock is kHz.

+config I2C_CPM
+ tristate "Freescale CPM1 or CPM2 (MPC8xx/826x)"
+ depends on (CPM1 || CPM2) && I2C && PPC_OF
+ help
+ This supports the use of the I2C interface on Freescale
+ processors with CPM1 or CPM2.
+
+ This driver can also be built as a module. If so, the module
+ will be called i2c-cpm.
+
config I2C_DAVINCI
tristate "DaVinci I2C driver"
depends on ARCH_DAVINCI

index 81d43c2..a395555 100644
@@ -11,6 +11,7 @@ obj-$(CONFIG_I2C_AMD8111)	+= i2c-amd8111.o

obj-$(CONFIG_I2C_AT91) += i2c-at91.o
obj-$(CONFIG_I2C_AU1550) += i2c-au1550.o
obj-$(CONFIG_I2C_BLACKFIN_TWI) += i2c-bfin-twi.o
+obj-$(CONFIG_I2C_CPM) += i2c-cpm.o
obj-$(CONFIG_I2C_DAVINCI) += i2c-davinci.o
obj-$(CONFIG_I2C_ELEKTOR) += i2c-elektor.o
obj-$(CONFIG_I2C_GPIO) += i2c-gpio.o

1.5.3.7