* [PATCH] ARM: dts: stm32: set i2c4 bus freq to 400KHz on stm32mp157c-ed1
@ 2020-02-10 17:17 Alain Volmat
[not found] ` <1581355041-13845-1-git-send-email-alain.volmat-qxv4g6HH51o@public.gmane.org>
0 siblings, 1 reply; 2+ messages in thread
From: Alain Volmat @ 2020-02-10 17:17 UTC (permalink / raw)
To: wsa-z923LK4zBo2bacvFa/9K2g, robh+dt-DgEjT+Ai2ygdnm+yROfE0A
Cc: mark.rutland-5wv7dgnIgG8, pierre-yves.mordret-qxv4g6HH51o,
mcoquelin.stm32-Re5JQEeQqe8AvxtiuMwx3w,
alexandre.torgue-qxv4g6HH51o, linux-i2c-u79uwXL29TY76Z2rM5mHXA,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-stm32-XDFAJ8BFU24N7RejjzZ/Li2xQDfSxrLKVpNB7YpNyf8,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-kernel-u79uwXL29TY76Z2rM5mHXA, fabrice.gasnier-qxv4g6HH51o,
alain.volmat-qxv4g6HH51o
On this board, the I2C4 bus has only a single slave (pmic) which
supports I2C Fast Mode hence setting bus frequency to 400 KHz.
Signed-off-by: Alain Volmat <alain.volmat-qxv4g6HH51o@public.gmane.org>
---
arch/arm/boot/dts/stm32mp157c-ed1.dts | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/boot/dts/stm32mp157c-ed1.dts b/arch/arm/boot/dts/stm32mp157c-ed1.dts
index 209dae010be4..ac4f7ee4ad55 100644
--- a/arch/arm/boot/dts/stm32mp157c-ed1.dts
+++ b/arch/arm/boot/dts/stm32mp157c-ed1.dts
@@ -135,6 +135,7 @@
pinctrl-0 = <&i2c4_pins_sleep_a>;
i2c-scl-rising-time-ns = <185>;
i2c-scl-falling-time-ns = <20>;
+ clock-frequency = <400000>;
status = "okay";
/* spare dmas for other usage */
/delete-property/dmas;
--
2.7.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] ARM: dts: stm32: set i2c4 bus freq to 400KHz on stm32mp157c-ed1
[not found] ` <1581355041-13845-1-git-send-email-alain.volmat-qxv4g6HH51o@public.gmane.org>
@ 2020-03-13 12:49 ` Alexandre Torgue
0 siblings, 0 replies; 2+ messages in thread
From: Alexandre Torgue @ 2020-03-13 12:49 UTC (permalink / raw)
To: Alain Volmat, wsa-z923LK4zBo2bacvFa/9K2g,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A
Cc: mark.rutland-5wv7dgnIgG8, pierre-yves.mordret-qxv4g6HH51o,
mcoquelin.stm32-Re5JQEeQqe8AvxtiuMwx3w,
linux-i2c-u79uwXL29TY76Z2rM5mHXA,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-stm32-XDFAJ8BFU24N7RejjzZ/Li2xQDfSxrLKVpNB7YpNyf8,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-kernel-u79uwXL29TY76Z2rM5mHXA, fabrice.gasnier-qxv4g6HH51o
Hi Alain
On 2/10/20 6:17 PM, Alain Volmat wrote:
> On this board, the I2C4 bus has only a single slave (pmic) which
> supports I2C Fast Mode hence setting bus frequency to 400 KHz.
>
> Signed-off-by: Alain Volmat <alain.volmat-qxv4g6HH51o@public.gmane.org>
> ---
> arch/arm/boot/dts/stm32mp157c-ed1.dts | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm/boot/dts/stm32mp157c-ed1.dts b/arch/arm/boot/dts/stm32mp157c-ed1.dts
> index 209dae010be4..ac4f7ee4ad55 100644
> --- a/arch/arm/boot/dts/stm32mp157c-ed1.dts
> +++ b/arch/arm/boot/dts/stm32mp157c-ed1.dts
> @@ -135,6 +135,7 @@
> pinctrl-0 = <&i2c4_pins_sleep_a>;
> i2c-scl-rising-time-ns = <185>;
> i2c-scl-falling-time-ns = <20>;
> + clock-frequency = <400000>;
> status = "okay";
> /* spare dmas for other usage */
> /delete-property/dmas;
>
Applied on stm32-next.
Thanks.
Alex
^ permalink raw reply [flat|nested] 2+ messages in thread
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2020-02-10 17:17 [PATCH] ARM: dts: stm32: set i2c4 bus freq to 400KHz on stm32mp157c-ed1 Alain Volmat
[not found] ` <1581355041-13845-1-git-send-email-alain.volmat-qxv4g6HH51o@public.gmane.org>
2020-03-13 12:49 ` Alexandre Torgue
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