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Message-ID: <mhng-25baa8a5-d7c1-4a37-8489-123fd12499f0@palmer-ri-x1c9>
Date: Thu, 02 Dec 2021 13:42:09 -0800 (PST)
From: Palmer Dabbelt <palmer@...belt.com>
To: plr.vincent@...il.com
CC: robh+dt@...nel.org, Paul Walmsley <paul.walmsley@...ive.com>,
aou@...s.berkeley.edu, krzysztof.kozlowski@...onical.com,
qiuwenbo@...inos.com.cn, devicetree@...r.kernel.org,
linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
david.abdurachmanov@...ive.com
Subject: Re: [PATCH v3 5/6] riscv: dts: sifive unmatched: Fix regulator for board rev3
On Fri, 19 Nov 2021 14:55:41 PST (-0800), plr.vincent@...il.com wrote:
> The existing values are rejected by the da9063 regulator driver, as they
> are unachievable with the declared chip setup (non-merged vcore and bmem
> are unable to provide the declared curent).
>
> Fix voltages to match rev3 schematics, which also matches their boot-up
There's a few references to rev 3 here. I'm not sure if that means we
should have multiple device trees -- this one seems pretty benign, but
some of the regulator stuff worries me there, where anything rev 3
specific might not be safe on other revisions.
Did any previous revisions make it out of the lab?
> configuration within the chip's available precision.
> Declare bcore1/bcore2 and bmem/bio as merged.
> Set ldo09 and ldo10 as always-on as their consumers are not declared but
> exist.
> Drop ldo current limits as there is no current limit feature for these
> regulators in the DA9063. Fixes warnings like:
> DA9063_LDO3: Operation of current configuration missing
>
> Signed-off-by: Vincent Pelletier <plr.vincent@...il.com>
>
> ---
> Changes since v2:
> - Fix end-of-commit-message separator so change lists do not end up in them.
> Changes since v1:
> - Remove trailing "." on subject line.
> ---
> .../boot/dts/sifive/hifive-unmatched-a00.dts | 84 ++++++-------------
> 1 file changed, 24 insertions(+), 60 deletions(-)
>
> diff --git a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
> index 6e7775fdae32..1abad0eec02e 100644
> --- a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
> +++ b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
> @@ -93,47 +93,31 @@ wdt {
> };
>
> regulators {
> - vdd_bcore1: bcore1 {
> - regulator-min-microvolt = <900000>;
> - regulator-max-microvolt = <900000>;
> - regulator-min-microamp = <5000000>;
> - regulator-max-microamp = <5000000>;
> - regulator-always-on;
> - };
> -
> - vdd_bcore2: bcore2 {
> - regulator-min-microvolt = <900000>;
> - regulator-max-microvolt = <900000>;
> - regulator-min-microamp = <5000000>;
> - regulator-max-microamp = <5000000>;
> + vdd_bcore: bcores-merged {
> + regulator-min-microvolt = <1050000>;
> + regulator-max-microvolt = <1050000>;
> + regulator-min-microamp = <4800000>;
> + regulator-max-microamp = <4800000>;
> regulator-always-on;
> };
>
> vdd_bpro: bpro {
> regulator-min-microvolt = <1800000>;
> regulator-max-microvolt = <1800000>;
> - regulator-min-microamp = <2500000>;
> - regulator-max-microamp = <2500000>;
> + regulator-min-microamp = <2400000>;
> + regulator-max-microamp = <2400000>;
> regulator-always-on;
> };
>
> vdd_bperi: bperi {
> - regulator-min-microvolt = <1050000>;
> - regulator-max-microvolt = <1050000>;
> + regulator-min-microvolt = <1060000>;
> + regulator-max-microvolt = <1060000>;
> regulator-min-microamp = <1500000>;
> regulator-max-microamp = <1500000>;
> regulator-always-on;
> };
>
> - vdd_bmem: bmem {
> - regulator-min-microvolt = <1200000>;
> - regulator-max-microvolt = <1200000>;
> - regulator-min-microamp = <3000000>;
> - regulator-max-microamp = <3000000>;
> - regulator-always-on;
> - };
> -
> - vdd_bio: bio {
> + vdd_bmem_bio: bmem-bio-merged {
> regulator-min-microvolt = <1200000>;
> regulator-max-microvolt = <1200000>;
> regulator-min-microamp = <3000000>;
> @@ -144,86 +128,66 @@ vdd_bio: bio {
> vdd_ldo1: ldo1 {
> regulator-min-microvolt = <1800000>;
> regulator-max-microvolt = <1800000>;
> - regulator-min-microamp = <100000>;
> - regulator-max-microamp = <100000>;
> regulator-always-on;
> };
>
> vdd_ldo2: ldo2 {
> regulator-min-microvolt = <1800000>;
> regulator-max-microvolt = <1800000>;
> - regulator-min-microamp = <200000>;
> - regulator-max-microamp = <200000>;
> regulator-always-on;
> };
>
> vdd_ldo3: ldo3 {
> - regulator-min-microvolt = <1800000>;
> - regulator-max-microvolt = <1800000>;
> - regulator-min-microamp = <200000>;
> - regulator-max-microamp = <200000>;
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> regulator-always-on;
> };
>
> vdd_ldo4: ldo4 {
> - regulator-min-microvolt = <1800000>;
> - regulator-max-microvolt = <1800000>;
> - regulator-min-microamp = <200000>;
> - regulator-max-microamp = <200000>;
> + regulator-min-microvolt = <2500000>;
> + regulator-max-microvolt = <2500000>;
> regulator-always-on;
> };
>
> vdd_ldo5: ldo5 {
> - regulator-min-microvolt = <1800000>;
> - regulator-max-microvolt = <1800000>;
> - regulator-min-microamp = <100000>;
> - regulator-max-microamp = <100000>;
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> regulator-always-on;
> };
>
> vdd_ldo6: ldo6 {
> - regulator-min-microvolt = <3300000>;
> - regulator-max-microvolt = <3300000>;
> - regulator-min-microamp = <200000>;
> - regulator-max-microamp = <200000>;
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> regulator-always-on;
> };
>
> vdd_ldo7: ldo7 {
> - regulator-min-microvolt = <1800000>;
> - regulator-max-microvolt = <1800000>;
> - regulator-min-microamp = <200000>;
> - regulator-max-microamp = <200000>;
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> regulator-always-on;
> };
>
> vdd_ldo8: ldo8 {
> - regulator-min-microvolt = <1800000>;
> - regulator-max-microvolt = <1800000>;
> - regulator-min-microamp = <200000>;
> - regulator-max-microamp = <200000>;
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> regulator-always-on;
> };
>
> vdd_ld09: ldo9 {
> regulator-min-microvolt = <1050000>;
> regulator-max-microvolt = <1050000>;
> - regulator-min-microamp = <200000>;
> - regulator-max-microamp = <200000>;
> + regulator-always-on;
> };
>
> vdd_ldo10: ldo10 {
> regulator-min-microvolt = <1000000>;
> regulator-max-microvolt = <1000000>;
> - regulator-min-microamp = <300000>;
> - regulator-max-microamp = <300000>;
> + regulator-always-on;
> };
>
> vdd_ldo11: ldo11 {
> regulator-min-microvolt = <2500000>;
> regulator-max-microvolt = <2500000>;
> - regulator-min-microamp = <300000>;
> - regulator-max-microamp = <300000>;
> regulator-always-on;
> };
> };
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