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Message-ID: <4833FA0C.5090800@scram.de>
Date: Wed, 21 May 2008 12:31:40 +0200
From: Jochen Friedrich <jochen@...am.de>
To: Anton Vorontsov <avorontsov@...mvista.com>
CC: linuxppc-dev list <linuxppc-dev@...abs.org>,
"Kernel, Linux" <linux-kernel@...r.kernel.org>,
Kumar Gala <galak@...nel.crashing.org>,
Scott Wood <scottwood@...escale.com>,
Linux I2C <i2c@...sensors.org>,
Jean Delvare <khali@...ux-fr.org>,
Paul Mackerras <paulus@...ba.org>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] [POWERPC] Add i2c pins to dts and board setup
Initialize I2C pins on boards with CPM1/CPM2 controllers.
Signed-off-by: Jochen Friedrich <jochen@...am.de>
---
Documentation/powerpc/booting-without-of.txt | 39 ++++++++++++++++++++++++++
arch/powerpc/boot/dts/mpc8272ads.dts | 11 +++++++
arch/powerpc/boot/dts/mpc866ads.dts | 11 +++++++
arch/powerpc/boot/dts/mpc885ads.dts | 11 +++++++
arch/powerpc/platforms/82xx/mpc8272_ads.c | 4 ++
arch/powerpc/platforms/8xx/mpc86xads_setup.c | 4 ++
arch/powerpc/platforms/8xx/mpc885ads_setup.c | 3 ++
7 files changed, 83 insertions(+), 0 deletions(-)
diff --git a/Documentation/powerpc/booting-without-of.txt b/Documentation/powerpc/booting-without-of.txt
index 1d2a772..3fc4eb2 100644
--- a/Documentation/powerpc/booting-without-of.txt
+++ b/Documentation/powerpc/booting-without-of.txt
@@ -2132,6 +2132,45 @@ platforms are moved over to use the flattened-device-tree model.
};
};
+ ix) I2C
+
+ The I2C controller is expressed as a bus under the CPM node.
+
+ Properties:
+ - compatible : "fsl,cpm1-i2c", "fsl,cpm2-i2c"
+ - reg : On CPM2 devices, the second resource doesn't specify the I2C
+ Parameter RAM itself, but the I2C_BASE field of the CPM2 Parameter RAM
+ (typically 0x8afc 0x2).
+ - #address-cells : Should be one. The cell is the i2c device address with
+ the r/w bit set to zero.
+ - #size-cells : Should be zero.
+ - linux,i2c-index : Can be used to hard code an i2c bus nummer.
+ - linux,i2c-class : Can be used to override the i2c class. The class is used
+ by old style i2c device drivers to find a bus in a specific context like
+ system management, video or sound. By default, I2C_CLASS_HWMON (1) is
+ being used. The definition of the classes can be found in
+ include/i2c/i2c.h
+ - bus-frequency : Can be used to set the i2c bus frequency. If unspecified,
+ a default frequency of 60kHz is being used.
+
+ Example, based on mpc823:
+
+ i2c@860 {
+ compatible = "fsl,mpc823-i2c",
+ "fsl,cpm1-i2c";
+ reg = <0x860 0x20 0x3c80 0x30>;
+ interrupts = <16>;
+ interrupt-parent = <&CPM_PIC>;
+ fsl,cpm-command = <0x10>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ rtc@68 {
+ compatible = "dallas,ds1307";
+ reg = <0x68>;
+ };
+ };
+
m) Chipselect/Local Bus
Properties:
diff --git a/arch/powerpc/boot/dts/mpc8272ads.dts b/arch/powerpc/boot/dts/mpc8272ads.dts
index 46e2da3..d27f8a7 100644
--- a/arch/powerpc/boot/dts/mpc8272ads.dts
+++ b/arch/powerpc/boot/dts/mpc8272ads.dts
@@ -217,6 +217,17 @@
linux,network-index = <1>;
fsl,cpm-command = <0x16200300>;
};
+
+ i2c@...60 {
+ compatible = "fsl,mpc8272-i2c",
+ "fsl,cpm2-i2c";
+ reg = <0x11860 0x20 0x8afc 0x2>;
+ interrupts = <1 8>;
+ interrupt-parent = <&PIC>;
+ fsl,cpm-command = <0x29600000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
};
PIC: interrupt-controller@...00 {
diff --git a/arch/powerpc/boot/dts/mpc866ads.dts b/arch/powerpc/boot/dts/mpc866ads.dts
index 765e43c..bd70065 100644
--- a/arch/powerpc/boot/dts/mpc866ads.dts
+++ b/arch/powerpc/boot/dts/mpc866ads.dts
@@ -171,6 +171,17 @@
fsl,cpm-command = <0000>;
linux,network-index = <1>;
};
+
+ i2c@860 {
+ compatible = "fsl,mpc866-i2c",
+ "fsl,cpm1-i2c";
+ reg = <0x860 0x20 0x3c80 0x30>;
+ interrupts = <16>;
+ interrupt-parent = <&CPM_PIC>;
+ fsl,cpm-command = <0x10>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
};
};
diff --git a/arch/powerpc/boot/dts/mpc885ads.dts b/arch/powerpc/boot/dts/mpc885ads.dts
index 9895043..b123e9f 100644
--- a/arch/powerpc/boot/dts/mpc885ads.dts
+++ b/arch/powerpc/boot/dts/mpc885ads.dts
@@ -215,6 +215,17 @@
fsl,cpm-command = <0x80>;
linux,network-index = <2>;
};
+
+ i2c@860 {
+ compatible = "fsl,mpc885-i2c",
+ "fsl,cpm1-i2c";
+ reg = <0x860 0x20 0x3c80 0x30>;
+ interrupts = <16>;
+ interrupt-parent = <&CPM_PIC>;
+ fsl,cpm-command = <0x10>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
};
};
diff --git a/arch/powerpc/platforms/82xx/mpc8272_ads.c b/arch/powerpc/platforms/82xx/mpc8272_ads.c
index 7d30187..8054c68 100644
--- a/arch/powerpc/platforms/82xx/mpc8272_ads.c
+++ b/arch/powerpc/platforms/82xx/mpc8272_ads.c
@@ -96,6 +96,10 @@ static struct cpm_pin mpc8272_ads_pins[] = {
{1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{2, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{2, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+
+ /* I2C */
+ {3, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
+ {3, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
};
static void __init init_ioports(void)
diff --git a/arch/powerpc/platforms/8xx/mpc86xads_setup.c b/arch/powerpc/platforms/8xx/mpc86xads_setup.c
index c028a5b..caaec29 100644
--- a/arch/powerpc/platforms/8xx/mpc86xads_setup.c
+++ b/arch/powerpc/platforms/8xx/mpc86xads_setup.c
@@ -65,6 +65,10 @@ static struct cpm_pin mpc866ads_pins[] = {
{CPM_PORTD, 13, CPM_PIN_OUTPUT},
{CPM_PORTD, 14, CPM_PIN_OUTPUT},
{CPM_PORTD, 15, CPM_PIN_OUTPUT},
+
+ /* I2C */
+ {CPM_PORTB, 26, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
+ {CPM_PORTB, 27, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
};
static void __init init_ioports(void)
diff --git a/arch/powerpc/platforms/8xx/mpc885ads_setup.c b/arch/powerpc/platforms/8xx/mpc885ads_setup.c
index 6e7ded0..45ed6cd 100644
--- a/arch/powerpc/platforms/8xx/mpc885ads_setup.c
+++ b/arch/powerpc/platforms/8xx/mpc885ads_setup.c
@@ -158,6 +158,9 @@ static struct cpm_pin mpc885ads_pins[] = {
{CPM_PORTE, 28, CPM_PIN_OUTPUT},
{CPM_PORTE, 29, CPM_PIN_OUTPUT},
#endif
+ /* I2C */
+ {CPM_PORTB, 26, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
+ {CPM_PORTB, 27, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
};
static void __init init_ioports(void)
--
1.5.5.1
--
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