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authorKieran Bingham <kieran.bingham+renesas@ideasonboard.com>2018-03-23 00:30:40 +0300
committerSimon Horman <horms+renesas@verge.net.au>2018-04-16 17:04:37 +0300
commit1d26a5217187189fdbee15bc03d3713d8e8ae7e9 (patch)
treeddd506c07dfde374f410b87c472ede52ceaeba12 /arch/arm/boot/dts/r8a7792-wheat.dts
parentf922fb5af1584c35bcd8bf661738b16dd4f65441 (diff)
downloadlinux-1d26a5217187189fdbee15bc03d3713d8e8ae7e9.tar.xz
ARM: dts: wheat: Fix ADV7513 address usage
The r8a7792 Wheat board has two ADV7513 devices sharing a single I2C bus, however in low power mode the ADV7513 will reset it's slave maps to use the hardware defined default addresses. The ADV7511 driver was adapted to allow the two devices to be registered correctly - but it did not take into account the fault whereby the devices reset the addresses. This results in an address conflict between the device using the default addresses, and the other device if it is in low-power-mode. Repair this issue by moving both devices away from the default address definitions. Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Fixes: f6eea82a87db ("ARM: dts: wheat: add DU support") Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Diffstat (limited to 'arch/arm/boot/dts/r8a7792-wheat.dts')
-rw-r--r--arch/arm/boot/dts/r8a7792-wheat.dts11
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/arm/boot/dts/r8a7792-wheat.dts b/arch/arm/boot/dts/r8a7792-wheat.dts
index b9471b67b728..95aab56a56ab 100644
--- a/arch/arm/boot/dts/r8a7792-wheat.dts
+++ b/arch/arm/boot/dts/r8a7792-wheat.dts
@@ -240,9 +240,15 @@
status = "okay";
clock-frequency = <400000>;
+ /*
+ * The adv75xx resets its addresses to defaults during low power mode.
+ * Because we have two ADV7513 devices on the same bus, we must change
+ * both of them away from the defaults so that they do not conflict.
+ */
hdmi@3d {
compatible = "adi,adv7513";
- reg = <0x3d>;
+ reg = <0x3d>, <0x2d>, <0x4d>, <0x5d>;
+ reg-names = "main", "cec", "edid", "packet";
adi,input-depth = <8>;
adi,input-colorspace = "rgb";
@@ -272,7 +278,8 @@
hdmi@39 {
compatible = "adi,adv7513";
- reg = <0x39>;
+ reg = <0x39>, <0x29>, <0x49>, <0x59>;
+ reg-names = "main", "cec", "edid", "packet";
adi,input-depth = <8>;
adi,input-colorspace = "rgb";