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[PATCH v2 1/4] hw/misc: imx6_ccm: Update PMU_MISC0 reset value

Bin Meng posted 4 patches 4 years, 11 months ago
Maintainers: Peter Maydell <peter.maydell@linaro.org>, Jean-Christophe Dubois <jcd@tribudubois.net>
There is a newer version of this series
[PATCH v2 1/4] hw/misc: imx6_ccm: Update PMU_MISC0 reset value
Posted by Bin Meng 4 years, 11 months ago 
From: Bin Meng <bin.meng@windriver.com>

U-Boot expects PMU_MISC0 register bit 7 is set (see init_bandgap()
in arch/arm/mach-imx/mx6/soc.c) during boot. This bit indicates the
bandgap has stabilized.

With this change, the latest upstream U-Boot (v2021.01-rc3) for imx6
sabrelite board (mx6qsabrelite_defconfig), with a slight change made
by switching CONFIG_OF_SEPARATE to CONFIG_OF_EMBED, boots to U-Boot
shell on QEMU with the following command:

$ qemu-system-arm -M sabrelite -smp 4 -m 1G -kernel u-boot \
    -display none -serial null -serial stdio

Boot log below:

  U-Boot 2021.01-rc3 (Dec 12 2020 - 17:40:02 +0800)

  CPU:   Freescale i.MX?? rev1.0 at 792 MHz
  Reset cause: POR
  Model: Freescale i.MX6 Quad SABRE Lite Board
  Board: SABRE Lite
  I2C:   ready
  DRAM:  1 GiB
  force_idle_bus: sda=0 scl=0 sda.gp=0x5c scl.gp=0x55
  force_idle_bus: failed to clear bus, sda=0 scl=0
  force_idle_bus: sda=0 scl=0 sda.gp=0x6d scl.gp=0x6c
  force_idle_bus: failed to clear bus, sda=0 scl=0
  force_idle_bus: sda=0 scl=0 sda.gp=0xcb scl.gp=0x5
  force_idle_bus: failed to clear bus, sda=0 scl=0
  MMC:   FSL_SDHC: 0, FSL_SDHC: 1
  Loading Environment from MMC... *** Warning - No block device, using default environment

  In:    serial
  Out:   serial
  Err:   serial
  Net:   Board Net Initialization Failed
  No ethernet found.
  starting USB...
  Bus usb@2184000: usb dr_mode not found
  USB EHCI 1.00
  Bus usb@2184200: USB EHCI 1.00
  scanning bus usb@2184000 for devices... 1 USB Device(s) found
  scanning bus usb@2184200 for devices... 1 USB Device(s) found
         scanning usb for storage devices... 0 Storage Device(s) found
         scanning usb for ethernet devices... 0 Ethernet Device(s) found
  Hit any key to stop autoboot:  0
  =>

Signed-off-by: Bin Meng <bin.meng@windriver.com>
---

(no changes since v1)

 hw/misc/imx6_ccm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/misc/imx6_ccm.c b/hw/misc/imx6_ccm.c
index cb74042..7e031b6 100644
--- a/hw/misc/imx6_ccm.c
+++ b/hw/misc/imx6_ccm.c
@@ -450,7 +450,7 @@ static void imx6_ccm_reset(DeviceState *dev)
     s->analog[PMU_REG_3P0] = 0x00000F74;
     s->analog[PMU_REG_2P5] = 0x00005071;
     s->analog[PMU_REG_CORE] = 0x00402010;
-    s->analog[PMU_MISC0] = 0x04000000;
+    s->analog[PMU_MISC0] = 0x04000080;
     s->analog[PMU_MISC1] = 0x00000000;
     s->analog[PMU_MISC2] = 0x00272727;
 
-- 
2.7.4
Re: [PATCH v2 1/4] hw/misc: imx6_ccm: Update PMU_MISC0 reset value
Posted by Alex Bennée 4 years, 10 months ago 
Bin Meng <bmeng.cn@gmail.com> writes:

> From: Bin Meng <bin.meng@windriver.com>
>
> U-Boot expects PMU_MISC0 register bit 7 is set (see init_bandgap()
> in arch/arm/mach-imx/mx6/soc.c) during boot. This bit indicates the
> bandgap has stabilized.
>
> With this change, the latest upstream U-Boot (v2021.01-rc3) for imx6
> sabrelite board (mx6qsabrelite_defconfig), with a slight change made
> by switching CONFIG_OF_SEPARATE to CONFIG_OF_EMBED, boots to U-Boot
> shell on QEMU with the following command:
>
> $ qemu-system-arm -M sabrelite -smp 4 -m 1G -kernel u-boot \
>     -display none -serial null -serial stdio
>
> Boot log below:
>
>   U-Boot 2021.01-rc3 (Dec 12 2020 - 17:40:02 +0800)
>
>   CPU:   Freescale i.MX?? rev1.0 at 792 MHz
>   Reset cause: POR
>   Model: Freescale i.MX6 Quad SABRE Lite Board
>   Board: SABRE Lite
>   I2C:   ready
>   DRAM:  1 GiB
>   force_idle_bus: sda=0 scl=0 sda.gp=0x5c scl.gp=0x55
>   force_idle_bus: failed to clear bus, sda=0 scl=0
>   force_idle_bus: sda=0 scl=0 sda.gp=0x6d scl.gp=0x6c
>   force_idle_bus: failed to clear bus, sda=0 scl=0
>   force_idle_bus: sda=0 scl=0 sda.gp=0xcb scl.gp=0x5
>   force_idle_bus: failed to clear bus, sda=0 scl=0
>   MMC:   FSL_SDHC: 0, FSL_SDHC: 1
>   Loading Environment from MMC... *** Warning - No block device, using default environment
>
>   In:    serial
>   Out:   serial
>   Err:   serial
>   Net:   Board Net Initialization Failed
>   No ethernet found.
>   starting USB...
>   Bus usb@2184000: usb dr_mode not found
>   USB EHCI 1.00
>   Bus usb@2184200: USB EHCI 1.00
>   scanning bus usb@2184000 for devices... 1 USB Device(s) found
>   scanning bus usb@2184200 for devices... 1 USB Device(s) found
>          scanning usb for storage devices... 0 Storage Device(s) found
>          scanning usb for ethernet devices... 0 Ethernet Device(s) found
>   Hit any key to stop autoboot:  0
>   =>
>
> Signed-off-by: Bin Meng <bin.meng@windriver.com>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

-- 
Alex Bennée
Re: [PATCH v2 1/4] hw/misc: imx6_ccm: Update PMU_MISC0 reset value
Posted by Bin Meng 4 years, 10 months ago 
On Wed, Dec 23, 2020 at 2:26 PM Bin Meng <bmeng.cn@gmail.com> wrote:
>
> From: Bin Meng <bin.meng@windriver.com>
>
> U-Boot expects PMU_MISC0 register bit 7 is set (see init_bandgap()
> in arch/arm/mach-imx/mx6/soc.c) during boot. This bit indicates the
> bandgap has stabilized.
>
> With this change, the latest upstream U-Boot (v2021.01-rc3) for imx6
> sabrelite board (mx6qsabrelite_defconfig), with a slight change made
> by switching CONFIG_OF_SEPARATE to CONFIG_OF_EMBED, boots to U-Boot
> shell on QEMU with the following command:
>
> $ qemu-system-arm -M sabrelite -smp 4 -m 1G -kernel u-boot \
>     -display none -serial null -serial stdio
>
> Boot log below:
>
>   U-Boot 2021.01-rc3 (Dec 12 2020 - 17:40:02 +0800)
>
>   CPU:   Freescale i.MX?? rev1.0 at 792 MHz
>   Reset cause: POR
>   Model: Freescale i.MX6 Quad SABRE Lite Board
>   Board: SABRE Lite
>   I2C:   ready
>   DRAM:  1 GiB
>   force_idle_bus: sda=0 scl=0 sda.gp=0x5c scl.gp=0x55
>   force_idle_bus: failed to clear bus, sda=0 scl=0
>   force_idle_bus: sda=0 scl=0 sda.gp=0x6d scl.gp=0x6c
>   force_idle_bus: failed to clear bus, sda=0 scl=0
>   force_idle_bus: sda=0 scl=0 sda.gp=0xcb scl.gp=0x5
>   force_idle_bus: failed to clear bus, sda=0 scl=0
>   MMC:   FSL_SDHC: 0, FSL_SDHC: 1
>   Loading Environment from MMC... *** Warning - No block device, using default environment
>
>   In:    serial
>   Out:   serial
>   Err:   serial
>   Net:   Board Net Initialization Failed
>   No ethernet found.
>   starting USB...
>   Bus usb@2184000: usb dr_mode not found
>   USB EHCI 1.00
>   Bus usb@2184200: USB EHCI 1.00
>   scanning bus usb@2184000 for devices... 1 USB Device(s) found
>   scanning bus usb@2184200 for devices... 1 USB Device(s) found
>          scanning usb for storage devices... 0 Storage Device(s) found
>          scanning usb for ethernet devices... 0 Ethernet Device(s) found
>   Hit any key to stop autoboot:  0
>   =>
>
> Signed-off-by: Bin Meng <bin.meng@windriver.com>
> ---
>
> (no changes since v1)
>
>  hw/misc/imx6_ccm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>

Ping?
Re: [PATCH v2 1/4] hw/misc: imx6_ccm: Update PMU_MISC0 reset value
Posted by Alex Bennée 4 years, 10 months ago 
Bin Meng <bmeng.cn@gmail.com> writes:

> On Wed, Dec 23, 2020 at 2:26 PM Bin Meng <bmeng.cn@gmail.com> wrote:
>>
>> From: Bin Meng <bin.meng@windriver.com>
>>
<snip>
>>
>> (no changes since v1)
>>
>>  hw/misc/imx6_ccm.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>
> Ping?

Looks good to me - Peter should be able to pull it into his tree soon.

-- 
Alex Bennée
Re: [PATCH v2 1/4] hw/misc: imx6_ccm: Update PMU_MISC0 reset value
Posted by Bin Meng 4 years, 10 months ago 
Hi Alex,

On Tue, Jan 5, 2021 at 5:25 PM Alex Bennée <alex.bennee@linaro.org> wrote:
>
>
> Bin Meng <bmeng.cn@gmail.com> writes:
>
> > On Wed, Dec 23, 2020 at 2:26 PM Bin Meng <bmeng.cn@gmail.com> wrote:
> >>
> >> From: Bin Meng <bin.meng@windriver.com>
> >>
> <snip>
> >>
> >> (no changes since v1)
> >>
> >>  hw/misc/imx6_ccm.c | 2 +-
> >>  1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >
> > Ping?
>
> Looks good to me - Peter should be able to pull it into his tree soon.

Thank you for the review.

Regards,
Bin

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