2020-02-10 17:18:29

by Alain Volmat

Subject: [PATCH] ARM: dts: stm32: set i2c4 bus freq to 400KHz on stm32mp15 DK boards

On DK boards, all I2C4 bus slaves supports I2C Fast Mode hence setting
the bus frequency to 400 KHz.

Signed-off-by: Alain Volmat <[email protected]>
---
arch/arm/boot/dts/stm32mp15xx-dkx.dtsi | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
index 7f5fcb2c5b03..2521f428ae67 100644
--- a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
+++ b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
@@ -221,6 +221,7 @@
pinctrl-1 = <&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

2020-03-13 12:51:55

by Alexandre Torgue

Subject: Re: [PATCH] ARM: dts: stm32: set i2c4 bus freq to 400KHz on stm32mp15 DK boards

Hi Alain

On 2/10/20 6:17 PM, Alain Volmat wrote:
> On DK boards, all I2C4 bus slaves supports I2C Fast Mode hence setting
> the bus frequency to 400 KHz.
>
> Signed-off-by: Alain Volmat <[email protected]>
> ---
> arch/arm/boot/dts/stm32mp15xx-dkx.dtsi | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
> index 7f5fcb2c5b03..2521f428ae67 100644
> --- a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
> +++ b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
> @@ -221,6 +221,7 @@
> pinctrl-1 = <&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