Re: [PATCH v2 09/10] arm/dts: omap3-beagle: Add twl4030 and i2c EEPROM
On 1/10/2012 12:24 AM, Tabi Timur-B04825 wrote:
On Fri, Dec 9, 2011 at 8:02 AM, Benoit Coussonb-cous...@ti.com wrote:
+ eeprom@50 {
+ compatible = ti,eeprom;
+ reg =0x50;
+ };
Why is this ti,? For EDID, isn't the I2C device actually on the
monitor itself, and DVI cable just connects to the I2C bus?
Yes, in fact I didn't know what to put here, since I do not know what
kind of eeprom the monitor will use.
And then I realized that the i2c driver is using the compatible name
without the prefix, so any prefix can be used there...
OK, that's maybe not a very valid reason... but I did not find any
better prefix at that time:-)
The reason I ask is that I'm trying to do the same thing for a PowerPC
board. I need to defined an EDID I2C node.
Well, this seems to be generic i2c eeprom, so maybe a ddc, prefix or
edid, will be a little bit better.
If later, we want to access that node from the display driver, we can
just add a phandle to the node's label: edid-eeprom: eeprom@50:
Regards,
Benoit
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Re: [PATCH v2 09/10] arm/dts: omap3-beagle: Add twl4030 and i2c EEPROM
On Fri, Dec 9, 2011 at 8:02 AM, Benoit Cousson b-cous...@ti.com wrote:
+ eeprom@50 {
+ compatible = ti,eeprom;
+ reg = 0x50;
+ };
Why is this ti,? For EDID, isn't the I2C device actually on the
monitor itself, and DVI cable just connects to the I2C bus?
The reason I ask is that I'm trying to do the same thing for a PowerPC
board. I need to defined an EDID I2C node.
--
Timur Tabi
Linux kernel developer at Freescale
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Re: [PATCH v2 09/10] arm/dts: omap3-beagle: Add twl4030 and i2c EEPROM
On Fri, Dec 09, 2011 at 03:02:40PM +0100, Benoit Cousson wrote:
Add required clock frequencies for the i2c client devices existing
on beagle board.
Add the twl4030 basic description with only the twl_rtc module.
Add the EEPROM node.
Based on original patch from Manju:
http://www.spinics.net/lists/linux-omap/msg55831.html
Signed-off-by: Benoit Cousson b-cous...@ti.com
Cc: Grant Likely grant.lik...@secretlab.ca
Cc: Rob Herring rob.herr...@calxeda.com
Acked-by: Grant Likely grant.lik...@secretlab.ca
---
arch/arm/boot/dts/omap3-beagle.dts | 38
1 files changed, 38 insertions(+), 0 deletions(-)
diff --git a/arch/arm/boot/dts/omap3-beagle.dts
b/arch/arm/boot/dts/omap3-beagle.dts
index 9f72cd4..b648279 100644
--- a/arch/arm/boot/dts/omap3-beagle.dts
+++ b/arch/arm/boot/dts/omap3-beagle.dts
@@ -18,3 +18,41 @@
reg = 0x8000 0x2000; /* 512 MB */
};
};
+
+i2c1 {
+ clock-frequency = 260;
+
+ /*
+ * Integrated Power Management Chip
+ */
+ twl@48 {
+ compatible = ti,twl4030;
+ reg = 0x48;
+ interrupts = 7; /* SYS_NIRQ cascaded to intc */
+ interrupt-controller;
+ #interrupt-cells = 1;
+ interrupt-parent = intc;
+
+ twl_rtc {
+ compatible = ti,twl4030-rtc;
+ interrupts = 11;
+ };
+ };
+};
+
+i2c2 {
+ clock-frequency = 40;
+};
+
+i2c3 {
+ clock-frequency = 10;
+
+ /*
+ * Display monitor features are burnt in the EEPROM
+ * as EDID data.
+ */
+ eeprom@50 {
+ compatible = ti,eeprom;
+ reg = 0x50;
+ };
+};
--
1.7.0.4
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[PATCH v2 09/10] arm/dts: omap3-beagle: Add twl4030 and i2c EEPROM
Add required clock frequencies for the i2c client devices existing
on beagle board.
Add the twl4030 basic description with only the twl_rtc module.
Add the EEPROM node.
Based on original patch from Manju:
http://www.spinics.net/lists/linux-omap/msg55831.html
Signed-off-by: Benoit Cousson b-cous...@ti.com
Cc: Grant Likely grant.lik...@secretlab.ca
Cc: Rob Herring rob.herr...@calxeda.com
---
arch/arm/boot/dts/omap3-beagle.dts | 38
1 files changed, 38 insertions(+), 0 deletions(-)
diff --git a/arch/arm/boot/dts/omap3-beagle.dts
b/arch/arm/boot/dts/omap3-beagle.dts
index 9f72cd4..b648279 100644
--- a/arch/arm/boot/dts/omap3-beagle.dts
+++ b/arch/arm/boot/dts/omap3-beagle.dts
@@ -18,3 +18,41 @@
reg = 0x8000 0x2000; /* 512 MB */
};
};
+
+i2c1 {
+ clock-frequency = 260;
+
+ /*
+* Integrated Power Management Chip
+*/
+ twl@48 {
+ compatible = ti,twl4030;
+ reg = 0x48;
+ interrupts = 7; /* SYS_NIRQ cascaded to intc */
+ interrupt-controller;
+ #interrupt-cells = 1;
+ interrupt-parent = intc;
+
+ twl_rtc {
+ compatible = ti,twl4030-rtc;
+ interrupts = 11;
+ };
+ };
+};
+
+i2c2 {
+ clock-frequency = 40;
+};
+
+i2c3 {
+ clock-frequency = 10;
+
+ /*
+* Display monitor features are burnt in the EEPROM
+* as EDID data.
+*/
+ eeprom@50 {
+ compatible = ti,eeprom;
+ reg = 0x50;
+ };
+};
--
1.7.0.4
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