* [PATCH 0/2] Fix I2C repeated start timing violation on Armada-38x. @ 2017-09-28 4:04 ` Kalyan Kinthada 0 siblings, 0 replies; 8+ messages in thread From: Kalyan Kinthada @ 2017-09-28 4:04 UTC (permalink / raw) To: jason, andrew, gregory.clement, sebastian.hesselbarth, robh+dt, mark.rutland, linux, wsa, devicetree Cc: linux-arm-kernel, linux-kernel, linux-i2c, Chris Packham, Kalyan Kinthada All the Armada 38x(380, 385, 388) have a silicon issue in the I2C controller which violates the I2C repeated start timing (errata FE-8471889). Activate the compatible string "marvell,mv78230-a0-i2c" in the device tree file of Armada-38x to fx this errata (FE-8471889). Updated the Documentation for the compatible string "marvell,mv78230-a0-i2c" by removing the "notes" because this is applicable for a number of SoCs such as early revisions of Armada XP and the Armada 38x variants. Thank You Gregory Clement for suggesting to reuse the "marvell,mv78230-a0-i2c" compatible string on Armada-38x SoCs. ------ Kalyan Kinthada (2): ARM: dts: Fix I2C repeated start issue on Armada-38x dt-bindings: i2c: Update documentation for "mv78230-a0-i2c" Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt | 4 ---- arch/arm/boot/dts/armada-38x.dtsi | 4 ++-- 2 files changed, 2 insertions(+), 6 deletions(-) -- 2.14.1 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH 0/2] Fix I2C repeated start timing violation on Armada-38x. @ 2017-09-28 4:04 ` Kalyan Kinthada 0 siblings, 0 replies; 8+ messages in thread From: Kalyan Kinthada @ 2017-09-28 4:04 UTC (permalink / raw) To: linux-arm-kernel All the Armada 38x(380, 385, 388) have a silicon issue in the I2C controller which violates the I2C repeated start timing (errata FE-8471889). Activate the compatible string "marvell,mv78230-a0-i2c" in the device tree file of Armada-38x to fx this errata (FE-8471889). Updated the Documentation for the compatible string "marvell,mv78230-a0-i2c" by removing the "notes" because this is applicable for a number of SoCs such as early revisions of Armada XP and the Armada 38x variants. Thank You Gregory Clement for suggesting to reuse the "marvell,mv78230-a0-i2c" compatible string on Armada-38x SoCs. ------ Kalyan Kinthada (2): ARM: dts: Fix I2C repeated start issue on Armada-38x dt-bindings: i2c: Update documentation for "mv78230-a0-i2c" Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt | 4 ---- arch/arm/boot/dts/armada-38x.dtsi | 4 ++-- 2 files changed, 2 insertions(+), 6 deletions(-) -- 2.14.1 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH 1/2] ARM: dts: Fix I2C repeated start issue on Armada-38x 2017-09-28 4:04 ` Kalyan Kinthada @ 2017-09-28 4:04 ` Kalyan Kinthada -1 siblings, 0 replies; 8+ messages in thread From: Kalyan Kinthada @ 2017-09-28 4:04 UTC (permalink / raw) To: jason, andrew, gregory.clement, sebastian.hesselbarth, robh+dt, mark.rutland, linux, wsa, devicetree Cc: linux-arm-kernel, linux-kernel, linux-i2c, Chris Packham, Kalyan Kinthada All the Armada 38x(380, 385, 388) have a silicon issue in the I2C controller which violates the I2C repeated start timing (errata FE-8471889). i2c-mv64xxx driver handles this errata based on the compatible string "marvell,mv78230-a0-i2c". This patch activates the "marvell,mv78230-a0-i2c" compatible string for the I2C controller on armada-38x SoC based devices. Signed-off-by: Kalyan Kinthada <kalyan.kinthada@alliedtelesis.co.nz> --- arch/arm/boot/dts/armada-38x.dtsi | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/boot/dts/armada-38x.dtsi b/arch/arm/boot/dts/armada-38x.dtsi index 7ff0811e61db..4960722aab32 100644 --- a/arch/arm/boot/dts/armada-38x.dtsi +++ b/arch/arm/boot/dts/armada-38x.dtsi @@ -178,7 +178,7 @@ }; i2c0: i2c@11000 { - compatible = "marvell,mv64xxx-i2c"; + compatible = "marvell,mv78230-a0-i2c", "marvell,mv64xxx-i2c"; reg = <0x11000 0x20>; #address-cells = <1>; #size-cells = <0>; @@ -189,7 +189,7 @@ }; i2c1: i2c@11100 { - compatible = "marvell,mv64xxx-i2c"; + compatible = "marvell,mv78230-a0-i2c", "marvell,mv64xxx-i2c"; reg = <0x11100 0x20>; #address-cells = <1>; #size-cells = <0>; -- 2.14.1 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 1/2] ARM: dts: Fix I2C repeated start issue on Armada-38x @ 2017-09-28 4:04 ` Kalyan Kinthada 0 siblings, 0 replies; 8+ messages in thread From: Kalyan Kinthada @ 2017-09-28 4:04 UTC (permalink / raw) To: linux-arm-kernel All the Armada 38x(380, 385, 388) have a silicon issue in the I2C controller which violates the I2C repeated start timing (errata FE-8471889). i2c-mv64xxx driver handles this errata based on the compatible string "marvell,mv78230-a0-i2c". This patch activates the "marvell,mv78230-a0-i2c" compatible string for the I2C controller on armada-38x SoC based devices. Signed-off-by: Kalyan Kinthada <kalyan.kinthada@alliedtelesis.co.nz> --- arch/arm/boot/dts/armada-38x.dtsi | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/boot/dts/armada-38x.dtsi b/arch/arm/boot/dts/armada-38x.dtsi index 7ff0811e61db..4960722aab32 100644 --- a/arch/arm/boot/dts/armada-38x.dtsi +++ b/arch/arm/boot/dts/armada-38x.dtsi @@ -178,7 +178,7 @@ }; i2c0: i2c at 11000 { - compatible = "marvell,mv64xxx-i2c"; + compatible = "marvell,mv78230-a0-i2c", "marvell,mv64xxx-i2c"; reg = <0x11000 0x20>; #address-cells = <1>; #size-cells = <0>; @@ -189,7 +189,7 @@ }; i2c1: i2c at 11100 { - compatible = "marvell,mv64xxx-i2c"; + compatible = "marvell,mv78230-a0-i2c", "marvell,mv64xxx-i2c"; reg = <0x11100 0x20>; #address-cells = <1>; #size-cells = <0>; -- 2.14.1 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 2/2] dt-bindings: i2c: Update documentation for "mv78230-a0-i2c" 2017-09-28 4:04 ` Kalyan Kinthada @ 2017-09-28 4:04 ` Kalyan Kinthada -1 siblings, 0 replies; 8+ messages in thread From: Kalyan Kinthada @ 2017-09-28 4:04 UTC (permalink / raw) To: jason, andrew, gregory.clement, sebastian.hesselbarth, robh+dt, mark.rutland, linux, wsa, devicetree Cc: linux-arm-kernel, linux-kernel, linux-i2c, Chris Packham, Kalyan Kinthada This commit modifies the documentation for "marvell,mv78230-a0-i2c" compatible string. The "marvell,mv78230-a0-i2c" compatible string enables the workaround for an i2c repeated start timing violation, but unlike "marvell,mv78230-i2c" it disables the i2c offload support. This is applicable to a number of SoCs such as early revisions of the Armada XP and the Armada 38x. Deleted the special note for "marvell,mv78230-a0-i2c" as it can be used by other SoCs as well. Signed-off-by: Kalyan Kinthada <kalyan.kinthada@alliedtelesis.co.nz> --- Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt | 4 ---- 1 file changed, 4 deletions(-) diff --git a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt index 5c30026921ae..37c00ad1c0bb 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt @@ -10,10 +10,6 @@ Required properties : - "marvell,mv64xxx-i2c" - "marvell,mv78230-i2c" - "marvell,mv78230-a0-i2c" - * Note: Only use "marvell,mv78230-a0-i2c" for a - very rare, initial version of the SoC which - had broken offload support. Linux - auto-detects this and sets it appropriately. - interrupts : The interrupt number Optional properties : -- 2.14.1 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 2/2] dt-bindings: i2c: Update documentation for "mv78230-a0-i2c" @ 2017-09-28 4:04 ` Kalyan Kinthada 0 siblings, 0 replies; 8+ messages in thread From: Kalyan Kinthada @ 2017-09-28 4:04 UTC (permalink / raw) To: linux-arm-kernel This commit modifies the documentation for "marvell,mv78230-a0-i2c" compatible string. The "marvell,mv78230-a0-i2c" compatible string enables the workaround for an i2c repeated start timing violation, but unlike "marvell,mv78230-i2c" it disables the i2c offload support. This is applicable to a number of SoCs such as early revisions of the Armada XP and the Armada 38x. Deleted the special note for "marvell,mv78230-a0-i2c" as it can be used by other SoCs as well. Signed-off-by: Kalyan Kinthada <kalyan.kinthada@alliedtelesis.co.nz> --- Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt | 4 ---- 1 file changed, 4 deletions(-) diff --git a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt index 5c30026921ae..37c00ad1c0bb 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt @@ -10,10 +10,6 @@ Required properties : - "marvell,mv64xxx-i2c" - "marvell,mv78230-i2c" - "marvell,mv78230-a0-i2c" - * Note: Only use "marvell,mv78230-a0-i2c" for a - very rare, initial version of the SoC which - had broken offload support. Linux - auto-detects this and sets it appropriately. - interrupts : The interrupt number Optional properties : -- 2.14.1 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH 2/2] dt-bindings: i2c: Update documentation for "mv78230-a0-i2c" 2017-09-28 4:04 ` Kalyan Kinthada @ 2017-09-28 7:56 ` Gregory CLEMENT -1 siblings, 0 replies; 8+ messages in thread From: Gregory CLEMENT @ 2017-09-28 7:56 UTC (permalink / raw) To: Kalyan Kinthada Cc: jason, andrew, sebastian.hesselbarth, robh+dt, mark.rutland, linux, wsa, devicetree, linux-arm-kernel, linux-kernel, linux-i2c, Chris Packham Hi Kalyan, On jeu., sept. 28 2017, Kalyan Kinthada <kalyan.kinthada@alliedtelesis.co.nz> wrote: > This commit modifies the documentation for > "marvell,mv78230-a0-i2c" compatible string. > > The "marvell,mv78230-a0-i2c" compatible string enables the workaround > for an i2c repeated start timing violation, but unlike > "marvell,mv78230-i2c" it disables the i2c offload support. This is > applicable to a number of SoCs such as early revisions of the Armada XP > and the Armada 38x. > > Deleted the special note for "marvell,mv78230-a0-i2c" as it can > be used by other SoCs as well. > > Signed-off-by: Kalyan Kinthada <kalyan.kinthada@alliedtelesis.co.nz> > --- > Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt | 4 ---- > 1 file changed, 4 deletions(-) > > diff --git a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt > index 5c30026921ae..37c00ad1c0bb 100644 > --- a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt > +++ b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt > @@ -10,10 +10,6 @@ Required properties : > - "marvell,mv64xxx-i2c" > - "marvell,mv78230-i2c" > - "marvell,mv78230-a0-i2c" > - * Note: Only use "marvell,mv78230-a0-i2c" for a > - very rare, initial version of the SoC which > - had broken offload support. Linux > - auto-detects this and sets it appropriately. I think here we should pour more details like what you wrote in the commit log. Maybe something like: - "marvell,mv78230-a0-i2c": for controller which do not support offload but still have the i2c repeated start timing violation issue, such as the ones found in the Armada XP A0 and the Armada 38x SoCs. And I still have to check it for Armada 375 and Armada 39x, but of course it is not preventing merging your patches. Gregory > - interrupts : The interrupt number > > Optional properties : > -- > 2.14.1 > -- Gregory Clement, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com ^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH 2/2] dt-bindings: i2c: Update documentation for "mv78230-a0-i2c" @ 2017-09-28 7:56 ` Gregory CLEMENT 0 siblings, 0 replies; 8+ messages in thread From: Gregory CLEMENT @ 2017-09-28 7:56 UTC (permalink / raw) To: linux-arm-kernel Hi Kalyan, On jeu., sept. 28 2017, Kalyan Kinthada <kalyan.kinthada@alliedtelesis.co.nz> wrote: > This commit modifies the documentation for > "marvell,mv78230-a0-i2c" compatible string. > > The "marvell,mv78230-a0-i2c" compatible string enables the workaround > for an i2c repeated start timing violation, but unlike > "marvell,mv78230-i2c" it disables the i2c offload support. This is > applicable to a number of SoCs such as early revisions of the Armada XP > and the Armada 38x. > > Deleted the special note for "marvell,mv78230-a0-i2c" as it can > be used by other SoCs as well. > > Signed-off-by: Kalyan Kinthada <kalyan.kinthada@alliedtelesis.co.nz> > --- > Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt | 4 ---- > 1 file changed, 4 deletions(-) > > diff --git a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt > index 5c30026921ae..37c00ad1c0bb 100644 > --- a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt > +++ b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt > @@ -10,10 +10,6 @@ Required properties : > - "marvell,mv64xxx-i2c" > - "marvell,mv78230-i2c" > - "marvell,mv78230-a0-i2c" > - * Note: Only use "marvell,mv78230-a0-i2c" for a > - very rare, initial version of the SoC which > - had broken offload support. Linux > - auto-detects this and sets it appropriately. I think here we should pour more details like what you wrote in the commit log. Maybe something like: - "marvell,mv78230-a0-i2c": for controller which do not support offload but still have the i2c repeated start timing violation issue, such as the ones found in the Armada XP A0 and the Armada 38x SoCs. And I still have to check it for Armada 375 and Armada 39x, but of course it is not preventing merging your patches. Gregory > - interrupts : The interrupt number > > Optional properties : > -- > 2.14.1 > -- Gregory Clement, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com ^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2017-09-28 7:56 UTC | newest] Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2017-09-28 4:04 [PATCH 0/2] Fix I2C repeated start timing violation on Armada-38x Kalyan Kinthada 2017-09-28 4:04 ` Kalyan Kinthada 2017-09-28 4:04 ` [PATCH 1/2] ARM: dts: Fix I2C repeated start issue " Kalyan Kinthada 2017-09-28 4:04 ` Kalyan Kinthada 2017-09-28 4:04 ` [PATCH 2/2] dt-bindings: i2c: Update documentation for "mv78230-a0-i2c" Kalyan Kinthada 2017-09-28 4:04 ` Kalyan Kinthada 2017-09-28 7:56 ` Gregory CLEMENT 2017-09-28 7:56 ` Gregory CLEMENT
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