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| Started by | Ludovic Desroches <ludovic.desroches@atmel.com> |
|---|---|
| First post | 2015-12-03 11:00 +0100 |
| Last post | 2015-12-03 11:40 +0100 |
| Articles | 2 — 2 participants |
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[PATCH v2 4/4] ARM: at91/dt: sama5d2 Xplained: pmic needs a specific sda hold time Ludovic Desroches <ludovic.desroches@atmel.com> - 2015-12-03 11:00 +0100
Re: [PATCH v2 4/4] ARM: at91/dt: sama5d2 Xplained: pmic needs a specific sda hold time Nicolas Ferre <nicolas.ferre@atmel.com> - 2015-12-03 11:40 +0100
| From | Ludovic Desroches <ludovic.desroches@atmel.com> |
|---|---|
| Date | 2015-12-03 11:00 +0100 |
| Subject | [PATCH v2 4/4] ARM: at91/dt: sama5d2 Xplained: pmic needs a specific sda hold time |
| Message-ID | <qByQ9-3g4-1@gated-at.bofh.it> |
Data have to be held longer for the PMIC device. The ACT8945A
datasheet claims that minimum SDA data hold time is about 300 ns.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
---
arch/arm/boot/dts/at91-sama5d2_xplained.dts | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/boot/dts/at91-sama5d2_xplained.dts b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
index ad6de73..9bced00 100644
--- a/arch/arm/boot/dts/at91-sama5d2_xplained.dts
+++ b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
@@ -129,6 +129,7 @@
dmas = <0>, <0>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_i2c0_default>;
+ i2c-sda-hold-time-ns = <350>;
status = "okay";
pmic: act8865@5b {
--
2.5.0
--
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| From | Nicolas Ferre <nicolas.ferre@atmel.com> |
|---|---|
| Date | 2015-12-03 11:40 +0100 |
| Subject | Re: [PATCH v2 4/4] ARM: at91/dt: sama5d2 Xplained: pmic needs a specific sda hold time |
| Message-ID | <qBzsT-3Jm-41@gated-at.bofh.it> |
| In reply to | #1282874 |
Le 03/12/2015 10:53, Ludovic Desroches a écrit :
> Data have to be held longer for the PMIC device. The ACT8945A
> datasheet claims that minimum SDA data hold time is about 300 ns.
>
> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Same here, we'll take this one with at91 material in at91-4.5-dt branch
soon.
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Thanks, bye.
> ---
> arch/arm/boot/dts/at91-sama5d2_xplained.dts | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm/boot/dts/at91-sama5d2_xplained.dts b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
> index ad6de73..9bced00 100644
> --- a/arch/arm/boot/dts/at91-sama5d2_xplained.dts
> +++ b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
> @@ -129,6 +129,7 @@
> dmas = <0>, <0>;
> pinctrl-names = "default";
> pinctrl-0 = <&pinctrl_i2c0_default>;
> + i2c-sda-hold-time-ns = <350>;
> status = "okay";
>
> pmic: act8865@5b {
>
--
Nicolas Ferre
--
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