All of lore.kernel.org
 help / color / mirror / Atom feed
From: sudeep.holla@arm.com (Sudeep Holla)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM64: juno: add NOR flash to device tree
Date: Thu, 15 Oct 2015 16:30:09 +0100	[thread overview]
Message-ID: <561FC681.2040809@arm.com> (raw)
In-Reply-To: <1444904415-19597-1-git-send-email-linus.walleij@linaro.org>

Hi Linus,

On 15/10/15 11:20, Linus Walleij wrote:
> The Juno motherboard has a NOR flash on the motherboard, enable
> this to be accessed with the CFI flash driver. Results after
> enabling MTD, MTD_CFI, MTD_PHYSMAP, MTD_PHYSMAP_OF,
> MTD_CFI_INTELEXT:
>

Just a note on this: we can't enable these when CPUIDLE is enabled as
the firmware assumes the flash is always in read mode while Linux leaves
NOR flash in "read id" mode after initialization.

So until the firmware is ready to handle that, we can't enabled both
on Juno. We had same issue even on TC2. I will follow up internally to
see if we can fix on Juno at-least.

So until then, keep an eye on this if someone complains about boot issue
with both MTD and CPUIDLE enabled.

-- 
Regards,
Sudeep

  parent reply	other threads:[~2015-10-15 15:30 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-15 10:20 [PATCH] ARM64: juno: add NOR flash to device tree Linus Walleij
2015-10-15 11:58 ` Liviu Dudau
2015-10-15 15:20   ` Arnd Bergmann
2015-10-18  9:22   ` Linus Walleij
2015-10-15 15:30 ` Sudeep Holla [this message]
2015-10-18  9:25   ` Linus Walleij
2015-10-19 10:17     ` Sudeep Holla
2015-10-19 10:29       ` Mark Rutland
2015-10-19 11:19         ` Linus Walleij
2015-10-19 11:27           ` Leif Lindholm
2015-10-19 21:50             ` Linus Walleij
2015-10-19 11:39           ` Mark Rutland
2015-10-19 14:40             ` Ard Biesheuvel
2015-10-19 21:58               ` Linus Walleij
2015-10-20 14:13                 ` Ard Biesheuvel
2015-10-19 21:55             ` Linus Walleij
2015-10-20 11:20               ` Leif Lindholm
     [not found]                 ` <CAD0U-hKZM-A2N_Lpnzwkt0WmAi+kRR=UOEE4Vr2M-iTo9ikkOg@mail.gmail.com>
2015-10-27 11:55                   ` Linus Walleij
2015-10-27 12:01                     ` Sudeep Holla
2015-10-27 12:22                       ` Linus Walleij
2015-10-27 12:33                         ` Sudeep Holla
2015-10-27 21:41                           ` Linus Walleij
2015-10-27 12:33                         ` Mark Rutland
2015-10-27 12:41                           ` Sudeep Holla
2015-10-27 21:43                           ` Linus Walleij
2015-10-27 13:20                     ` Ryan Harkin
2015-10-19 11:20         ` Leif Lindholm
2015-10-21 11:18           ` Ryan Harkin
2015-10-26  8:41             ` [PATCH] arm64/efi: register UEFI runtime mmio regions as iomem resources Ard Biesheuvel
2015-10-27 12:08               ` Linus Walleij
2015-10-27 12:31                 ` Ard Biesheuvel
2015-11-16 12:45                   ` Ard Biesheuvel
2015-10-27 11:59             ` [PATCH] ARM64: juno: add NOR flash to device tree Linus Walleij

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=561FC681.2040809@arm.com \
    --to=sudeep.holla@arm.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.