From: Alexandre TORGUE <alexandre.torgue@foss.st.com>
To: Marek Vasut <marex@denx.de>, <linux-arm-kernel@lists.infradead.org>
Cc: <linux-stm32@st-md-mailman.stormreply.com>
Subject: Re: [PATCH] ARM: dts: stm32: Move DHCOR BUCK3 VDD 2V9 adjustment to 1V8 DTSI
Date: Mon, 13 Jun 2022 09:42:41 +0200 [thread overview]
Message-ID: <0a86b3bc-7a7a-a66f-0d9f-85035aaff032@foss.st.com> (raw)
In-Reply-To: <20220504124945.77331-1-marex@denx.de>
Hi Marek
On 5/4/22 14:49, Marek Vasut wrote:
> The Buck3 on DHCOR is used to supply IO voltage. It can output either 3V3
> in the default DHCOR configuration, or 2V9 in case of AV96 DHCOR variant
> which has extra Empirion DCDC converter in front of the 1V8 IO supply, or
> outright 1V8 in case of 1V8 IO DHCOR without the Empirion DCDC converter.
>
> The 2V9 mode in case of AV96 DHCOR variant is used to reduce unnecessarily
> high input voltage to the Empirion DCDC converter, so move it into matching
> DTSI to stop confusing users.
>
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
> Cc: linux-stm32@st-md-mailman.stormreply.com
> To: linux-arm-kernel@lists.infradead.org
> ---
> arch/arm/boot/dts/stm32mp15xx-dhcor-io1v8.dtsi | 5 +++++
> arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi | 4 ++--
> 2 files changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/boot/dts/stm32mp15xx-dhcor-io1v8.dtsi b/arch/arm/boot/dts/stm32mp15xx-dhcor-io1v8.dtsi
> index 75172314d7afd..9937b28548c23 100644
> --- a/arch/arm/boot/dts/stm32mp15xx-dhcor-io1v8.dtsi
> +++ b/arch/arm/boot/dts/stm32mp15xx-dhcor-io1v8.dtsi
> @@ -18,6 +18,11 @@ vdd_io: regulator-buck-io {
> };
> };
>
> +&vdd {
> + regulator-min-microvolt = <2900000>;
> + regulator-max-microvolt = <2900000>;
> +};
> +
> &pwr_regulators {
> vdd-supply = <&vdd_io>;
> };
> diff --git a/arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi b/arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi
> index 6336c3ca0f0e2..134a798ad3f23 100644
> --- a/arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi
> +++ b/arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi
> @@ -119,8 +119,8 @@ vdd_ddr: buck2 {
>
> vdd: buck3 {
> regulator-name = "vdd";
> - regulator-min-microvolt = <2900000>;
> - regulator-max-microvolt = <2900000>;
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> regulator-always-on;
> regulator-initial-mode = <0>;
> regulator-over-current-protection;
Applied on stm32-next.
Thanks.
Alex
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prev parent reply other threads:[~2022-06-13 7:43 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-04 12:49 [PATCH] ARM: dts: stm32: Move DHCOR BUCK3 VDD 2V9 adjustment to 1V8 DTSI Marek Vasut
2022-06-13 7:42 ` Alexandre TORGUE [this message]
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