| From 2695e0ddc0e448c16843a31b98bd9972a103d94d Mon Sep 17 00:00:00 2001 |
| From: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> |
| Date: Thu, 22 Mar 2018 21:30:40 +0000 |
| Subject: [PATCH 1361/1795] 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> |
| (cherry picked from commit 1d26a5217187189fdbee15bc03d3713d8e8ae7e9) |
| Signed-off-by: Simon Horman <horms+renesas@verge.net.au> |
| Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> |
| --- |
| arch/arm/boot/dts/r8a7792-wheat.dts | 11 +++++++++-- |
| 1 file 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"; |
| -- |
| 2.19.0 |
| |
