From: Dinh Nguyen <dinguyen@kernel.org>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] arm: socfpga: fix issue with warm reset when CSEL is 0
Date: Tue, 14 Feb 2017 11:35:27 -0600 [thread overview]
Message-ID: <4c296931-339f-55c0-9fec-2515f89578de@kernel.org> (raw)
In-Reply-To: <1487085833-29325-1-git-send-email-dwesterg@gmail.com>
On 02/14/2017 09:23 AM, Dalon Westergreen wrote:
> When CSEL=0x0 the socfpga bootrom does not touch the clock
> configuration for the device. This can lead to a boot failure
> on warm resets. To address this, the bootrom is configured to
> run a bit of code in the last 4KB of onchip ram on a warm reset.
> This code puts the PLLs in bypass, disables the bootrom configuration
> to run the code snippet, and issues a warm reset to run the bootrom.
>
> Signed-off-by: Dalon Westergreen <dwesterg@gmail.com>
> ---
> arch/arm/mach-socfpga/Makefile | 2 +-
> arch/arm/mach-socfpga/include/mach/clock_manager.h | 22 ++++++-
> arch/arm/mach-socfpga/include/mach/reset_manager.h | 4 ++
> .../arm/mach-socfpga/include/mach/system_manager.h | 7 ++-
> arch/arm/mach-socfpga/misc.c | 29 +++++++++
> arch/arm/mach-socfpga/reset_clock_manager.S | 71 ++++++++++++++++++++++
> 6 files changed, 132 insertions(+), 3 deletions(-)
> create mode 100644 arch/arm/mach-socfpga/reset_clock_manager.S
>
> diff --git a/arch/arm/mach-socfpga/Makefile b/arch/arm/mach-socfpga/Makefile
> index 809cd47..6876ccf 100644
> --- a/arch/arm/mach-socfpga/Makefile
> +++ b/arch/arm/mach-socfpga/Makefile
> @@ -8,7 +8,7 @@
Please fix up these checkpatch errors:
total: 17 errors, 4 warnings, 2 checks, 199 lines checked
Dinh
prev parent reply other threads:[~2017-02-14 17:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-14 15:23 [U-Boot] [PATCH] arm: socfpga: fix issue with warm reset when CSEL is 0 Dalon Westergreen
2017-02-14 17:35 ` Dinh Nguyen [this message]
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