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SubjectRe: [PATCH] ARM: dts: stm32: add missing usbh clock and fix clk order on stm32mp15
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Hi Fabrice

On 6/21/22 10:45, Fabrice Gasnier wrote:
> The USBH composed of EHCI and OHCI controllers needs the PHY clock to be
> initialized first, before enabling (gating) them. The reverse is also
> required when going to suspend.
> So, add USBPHY clock as 1st entry in both controllers, so the USBPHY PLL
> gets enabled 1st upon controller init. Upon suspend/resume, this also makes
> the clock to be disabled/re-enabled in the correct order.
> This fixes some IRQ storm conditions seen when going to low-power, due to
> PHY PLL being disabled before all clocks are cleanly gated.
>
> Fixes: 949a0c0dec85 ("ARM: dts: stm32: add USB Host (USBH) support to stm32mp157c")
> Fixes: db7be2cb87ae ("ARM: dts: stm32: use usbphyc ck_usbo_48m as USBH OHCI clock on stm32mp151")
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
> ---
> arch/arm/boot/dts/stm32mp151.dtsi | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/boot/dts/stm32mp151.dtsi b/arch/arm/boot/dts/stm32mp151.dtsi
> index edc0a1641c7b..9e2226430802 100644
> --- a/arch/arm/boot/dts/stm32mp151.dtsi
> +++ b/arch/arm/boot/dts/stm32mp151.dtsi
> @@ -1473,7 +1473,7 @@ stmmac_axi_config_0: stmmac-axi-config {
> usbh_ohci: usb@5800c000 {
> compatible = "generic-ohci";
> reg = <0x5800c000 0x1000>;
> - clocks = <&rcc USBH>, <&usbphyc>;
> + clocks = <&usbphyc>, <&rcc USBH>;
> resets = <&rcc USBH_R>;
> interrupts = <GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH>;
> status = "disabled";
> @@ -1482,7 +1482,7 @@ usbh_ohci: usb@5800c000 {
> usbh_ehci: usb@5800d000 {
> compatible = "generic-ehci";
> reg = <0x5800d000 0x1000>;
> - clocks = <&rcc USBH>;
> + clocks = <&usbphyc>, <&rcc USBH>;
> resets = <&rcc USBH_R>;
> interrupts = <GIC_SPI 75 IRQ_TYPE_LEVEL_HIGH>;
> companion = <&usbh_ohci>;

Applied in stm32-fixes.

Thanks
Alex

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