* [PATCH 0/2] arm: dts: salvator-x(s): increase I2C ch4 bus speed
@ 2018-05-25 11:05 Wolfram Sang
2018-05-25 11:05 ` [PATCH 1/2] arm64: dts: salvator-x: update I2C ch4 clock to 400kHz Wolfram Sang
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Wolfram Sang @ 2018-05-25 11:05 UTC (permalink / raw)
To: linux-renesas-soc; +Cc: Simon Horman, Wolfram Sang
Patches taken from the BSP. I did some testing by accessing the chips manually.
I also checked the datasheets of the attached I2C clients which confirm this
step up.
Takeshi Kihara (2):
arm64: dts: salvator-x: Update I2C ch4 clock to 400kHz
arm64: dts: salvator-xs: Update I2C ch4 clock to 400kHz
arch/arm64/boot/dts/renesas/salvator-x.dtsi | 2 ++
arch/arm64/boot/dts/renesas/salvator-xs.dtsi | 2 ++
2 files changed, 4 insertions(+)
--
2.11.0
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH 1/2] arm64: dts: salvator-x: update I2C ch4 clock to 400kHz
2018-05-25 11:05 [PATCH 0/2] arm: dts: salvator-x(s): increase I2C ch4 bus speed Wolfram Sang
@ 2018-05-25 11:05 ` Wolfram Sang
2018-05-25 11:05 ` [PATCH 2/2] arm64: dts: salvator-xs: " Wolfram Sang
2018-05-28 9:27 ` [PATCH 0/2] arm: dts: salvator-x(s): increase I2C ch4 bus speed Simon Horman
2 siblings, 0 replies; 4+ messages in thread
From: Wolfram Sang @ 2018-05-25 11:05 UTC (permalink / raw)
To: linux-renesas-soc; +Cc: Simon Horman, Takeshi Kihara, Wolfram Sang
From: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Any of the following devices connected to I2C ch4 of the Salvator-X board
will operate at 400 kHz:
PCA9654, 9FGV0841, ADV7482WBBCZ, MAX9611, 5P49V5923
This patch updates the clock frequency to 400 KHz.
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
arch/arm64/boot/dts/renesas/salvator-x.dtsi | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/boot/dts/renesas/salvator-x.dtsi b/arch/arm64/boot/dts/renesas/salvator-x.dtsi
index 468868c8ed9f..2828482eba1c 100644
--- a/arch/arm64/boot/dts/renesas/salvator-x.dtsi
+++ b/arch/arm64/boot/dts/renesas/salvator-x.dtsi
@@ -20,6 +20,8 @@
};
&i2c4 {
+ clock-frequency = <400000>;
+
versaclock5: clock-generator@6a {
compatible = "idt,5p49v5923";
reg = <0x6a>;
--
2.11.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH 2/2] arm64: dts: salvator-xs: update I2C ch4 clock to 400kHz
2018-05-25 11:05 [PATCH 0/2] arm: dts: salvator-x(s): increase I2C ch4 bus speed Wolfram Sang
2018-05-25 11:05 ` [PATCH 1/2] arm64: dts: salvator-x: update I2C ch4 clock to 400kHz Wolfram Sang
@ 2018-05-25 11:05 ` Wolfram Sang
2018-05-28 9:27 ` [PATCH 0/2] arm: dts: salvator-x(s): increase I2C ch4 bus speed Simon Horman
2 siblings, 0 replies; 4+ messages in thread
From: Wolfram Sang @ 2018-05-25 11:05 UTC (permalink / raw)
To: linux-renesas-soc; +Cc: Simon Horman, Takeshi Kihara, Wolfram Sang
From: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Any of the following devices connected to I2C ch4 of the Salvator-XS
board will operate at 400 kHz:
PCA9654E, 9FGV0841, ADV7482WBBCZ, MAX9611, 5P49V6901A
This patch updates the clock frequency to 400 KHz.
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
arch/arm64/boot/dts/renesas/salvator-xs.dtsi | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/boot/dts/renesas/salvator-xs.dtsi b/arch/arm64/boot/dts/renesas/salvator-xs.dtsi
index bf4d200fb546..1ac03b7564aa 100644
--- a/arch/arm64/boot/dts/renesas/salvator-xs.dtsi
+++ b/arch/arm64/boot/dts/renesas/salvator-xs.dtsi
@@ -20,6 +20,8 @@
};
&i2c4 {
+ clock-frequency = <400000>;
+
versaclock6: clock-generator@6a {
compatible = "idt,5p49v6901";
reg = <0x6a>;
--
2.11.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH 0/2] arm: dts: salvator-x(s): increase I2C ch4 bus speed
2018-05-25 11:05 [PATCH 0/2] arm: dts: salvator-x(s): increase I2C ch4 bus speed Wolfram Sang
2018-05-25 11:05 ` [PATCH 1/2] arm64: dts: salvator-x: update I2C ch4 clock to 400kHz Wolfram Sang
2018-05-25 11:05 ` [PATCH 2/2] arm64: dts: salvator-xs: " Wolfram Sang
@ 2018-05-28 9:27 ` Simon Horman
2 siblings, 0 replies; 4+ messages in thread
From: Simon Horman @ 2018-05-28 9:27 UTC (permalink / raw)
To: Wolfram Sang; +Cc: linux-renesas-soc
On Fri, May 25, 2018 at 01:05:40PM +0200, Wolfram Sang wrote:
> Patches taken from the BSP. I did some testing by accessing the chips manually.
> I also checked the datasheets of the attached I2C clients which confirm this
> step up.
Hi Wolfram,
Given Olof Johansson's recent comments in ("Re: [GIT PULL] Renesas ARM64
Based SoC DT Updates for v4.18") please consider squashing this
series into a single patch and posting a v2.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2018-05-28 9:28 UTC | newest]
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2018-05-25 11:05 [PATCH 0/2] arm: dts: salvator-x(s): increase I2C ch4 bus speed Wolfram Sang
2018-05-25 11:05 ` [PATCH 1/2] arm64: dts: salvator-x: update I2C ch4 clock to 400kHz Wolfram Sang
2018-05-25 11:05 ` [PATCH 2/2] arm64: dts: salvator-xs: " Wolfram Sang
2018-05-28 9:27 ` [PATCH 0/2] arm: dts: salvator-x(s): increase I2C ch4 bus speed Simon Horman
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