[PATCH 1/3] arm: Add support for Qualcomm IPQ40xx family

From: Robert Marko <robert.marko@sartura.hr>
To: u-boot@lists.denx.de
Subject: [PATCH 1/3] arm: Add support for Qualcomm IPQ40xx family
Date: Fri, 10 Jul 2020 19:31:34 +0200	[thread overview]
Message-ID: <CA+HBbNEBK_2uFqb-KJMhCsQUy9R96gZaZekVeB7miv3kPBtumg@mail.gmail.com> (raw)
In-Reply-To: <20200710165752.GD6246@bill-the-cat>

On Fri, Jul 10, 2020 at 6:57 PM Tom Rini <trini@konsulko.com> wrote:
>
> On Fri, Jul 10, 2020 at 05:52:51PM +0200, Robert Marko wrote:
> > On Fri, Jul 10, 2020 at 5:25 PM Tom Rini <trini@konsulko.com> wrote:
> >
> > > On Mon, Jul 06, 2020 at 10:37:54AM +0200, Robert Marko wrote:
> > >
> > > > This introduces initial support for the popular Qualcomm
> > > > IPQ40x8 and IPQ40x9 WiSoC series.
> > > >
> > > > IPQ40xx series have 4x Cortex A7 ARM-v7A cores.
> > > > Supported are: IPQ4018, IPQ4019, IPQ4028 and IPQ4029.
> > > >
> > > > IPQ40x8 and IPQ40x9 use the same cores, but differ in
> > > > addressable RAM size (1GB for IPQ40x9 and 256MB for IPQ40x8)
> > > > and supported peripherals (IPQ40x8 lacks RGMII, LCD controller
> > > > and EMMC/SDHCI controllers).
> > > >
> > > > IQP4028/IPQ4029 models differ from IPQ4018/IPQ4019 only
> > > > by their rated temperatures rates with IPQ402X models being
> > > > rated for wider temperature ranges.
> > > >
> > > > Initially this supports:
> > > > * Simple clock driver (Only for UART1 now, will be extended)
> > > > * Pinctrl driver (Supports UARTX and GPIO now, will be extended)
> > > > * GPIOs already supported by msm_gpio driver with updates
> > > > * UARTs already supported by serial_msm driver with updates
> > > >
> > > > Further peripherals will come in later patches.
> > > >
> > > > Signed-off-by: Robert Marko <robert.marko@sartura.hr>
> > > > ---
> > > >  MAINTAINERS                                |   7 ++
> > > >  arch/arm/Kconfig                           |  13 ++
> > > >  arch/arm/Makefile                          |   1 +
> > > >  arch/arm/dts/qcom-ipq4019.dtsi             |  79 ++++++++++++
> > >
> > > The goal with dts files (that aren't the -u-boot.dtsi ones of course) is
> > > that they come from upstream Linux.  How far along is that with this
> > > SoC?  Everything else here looks fine, thanks.
> > >
> > Well, I tried to keep as much as possible identical or really similar to
> > the upstream Linux nodes,
> > but there are still differences due to how drivers are simplified.
>
> OK.  You should be able to take the base upstream DTS files and between
> things like CONFIG_OF_REMOVE_PROPS / CONFIG_OF_SPL_REMOVE_PROPS and the
> automatically included -u-boot.dtsi files make any further changes that
> we have to make for space reasons or other tweaks.
Well, I would actually like to avoid that kind of scenario as Linux
DTS has way more nodes that U-boot will ever have.
I intentionally used the smallest possible amount of DT nodes that made sense.

Regards,
Robert
>
> --
> Tom