From: "Jernej Škrabec" <jernej.skrabec@gmail.com>
To: andre.przywara@arm.com
Cc: jagan@amarulasolutions.com, u-boot@lists.denx.de,
linux-sunxi@lists.linux.dev
Subject: Re: Re: [PATCH] configs: OrangePi PC2: Update defaults
Date: Sat, 12 Jun 2021 08:08:51 +0200 [thread overview]
Message-ID: <9487261.lNKWQbxSyI@kista> (raw)
In-Reply-To: <2418795.6bcLzA2rA2@kista>
Dne sobota, 12. junij 2021 ob 07:50:27 CEST je Jernej Škrabec napisal(a):
> Dne ponedeljek, 07. junij 2021 ob 19:42:45 CEST je Jernej Skrabec
napisal(a):
> > OrangePi PC2 board has DRAM with ODT, so enable it. ZQ value is also
> > slightly different in vendor images, so update it as well. H5 SoC is
> > also connected to voltage regulator. It's default value is pretty low,
> > so in order to avoid instability, enable driver for it and set it to
> > appropriate voltage.
> >
> > Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
> > ---
> > configs/orangepi_pc2_defconfig | 6 ++++--
> > 1 file changed, 4 insertions(+), 2 deletions(-)
> >
> > diff --git a/configs/orangepi_pc2_defconfig b/configs/orangepi_pc2_defconfig
> > index f72ffe27b26c..5e4cca793f53 100644
> > --- a/configs/orangepi_pc2_defconfig
> > +++ b/configs/orangepi_pc2_defconfig
> > @@ -3,13 +3,15 @@ CONFIG_ARCH_SUNXI=y
> > CONFIG_SPL=y
> > CONFIG_MACH_SUN50I_H5=y
> > CONFIG_DRAM_CLK=672
> > -CONFIG_DRAM_ZQ=3881977
> > -# CONFIG_DRAM_ODT_EN is not set
> > +CONFIG_DRAM_ZQ=4145117
I re-checked BSP DT and original ZQ value is correct. So this patch should
only enable ODT, which is really enabled in BSP and DRAM ICs support it.
Best regards,
Jernej
> > CONFIG_MACPWR="PD6"
> > CONFIG_SPL_SPI_SUNXI=y
> > +CONFIG_SPL_I2C_SUPPORT=y
> > CONFIG_DEFAULT_DEVICE_TREE="sun50i-h5-orangepi-pc2"
> > # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
> > CONFIG_SUN8I_EMAC=y
> > +CONFIG_SY8106A_POWER=y
> > +CONFIG_SY8106A_VOUT1_VOLT=1100
>
> I'm not sure if voltage regulator adjustment needs to be enabled. By
default,
> it's set to 1.1 V using resistor divider. However, it can be still needed if
> board is rebooted and OS set it to lower value before reboot.
>
> Best regards,
> Jernej
>
> > CONFIG_USB_EHCI_HCD=y
> > CONFIG_USB_OHCI_HCD=y
> > CONFIG_USB_MUSB_GADGET=y
> > --
> > 2.31.1
> >
> >
>
>
>
next prev parent reply other threads:[~2021-06-12 6:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-07 17:42 [PATCH] configs: OrangePi PC2: Update defaults Jernej Skrabec
2021-06-12 5:50 ` Jernej Škrabec
2021-06-12 6:08 ` Jernej Škrabec [this message]
2021-06-13 23:25 ` Andre Przywara
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