From: Shawn Lin <shawn.lin@rock-chips.com>
To: Guodong Xu <guodong.xu@linaro.org>,
jh80.chung@samsung.com, --to=robh+dt@kernel.org,
pawel.moll@arm.com, mark.rutland@arm.com,
ijc+devicetree@hellion.org.uk, galak@codeaurora.org,
ulf.hansson@linaro.org
Cc: shawn.lin@rock-chips.com, "Heiko Stübner" <heiko@sntech.de>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 0/2] mmc: dw_mmc: controller reset support
Date: Wed, 30 Mar 2016 19:45:05 +0800 [thread overview]
Message-ID: <56FBBC41.5080104@rock-chips.com> (raw)
In-Reply-To: <1459322696-29919-1-git-send-email-guodong.xu@linaro.org>
+ Heiko
On 2016/3/30 15:24, Guodong Xu wrote:
> mmc controller registers may in abnormal state if mmc is used in
> bootloader, eg. to load kernel from eMMC. Some controllers cann't
> clear their registers when clk is set. They use dedicated reset
> logics to do this.
>
> In this patch, a 'resets' property is added into dw_mmc dts
> node. When driver does parse_dt and probe, it calls reset API to
> deassert the 'reset' of dw_mmc host controller. When probe error or
> remove, it calls reset API to assert it.
>
> Chip vendor's actual reset logics is implemented in reset driver, not
> in dw_mmc code.
>
> Please also refer to Documentation/devicetree/bindings/reset/reset.txt
>
> Guodong Xu (2):
> Documentation: synopsys-dw-mshc: add binding for resets
> mmc: dw_mmc: add resets support to dw_mmc
>
> .../devicetree/bindings/mmc/synopsys-dw-mshc.txt | 4 ++++
> drivers/mmc/host/dw_mmc.c | 20 +++++++++++++++++++-
> include/linux/mmc/dw_mmc.h | 6 ++++--
> 3 files changed, 27 insertions(+), 3 deletions(-)
>
--
Best Regards
Shawn Lin
WARNING: multiple messages have this Message-ID (diff)
From: Shawn Lin <shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
To: Guodong Xu <guodong.xu-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
jh80.chung-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org,
--to=robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
pawel.moll-5wv7dgnIgG8@public.gmane.org,
mark.rutland-5wv7dgnIgG8@public.gmane.org,
ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org,
galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org,
ulf.hansson-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org
Cc: shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org,
"Heiko Stübner" <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH v3 0/2] mmc: dw_mmc: controller reset support
Date: Wed, 30 Mar 2016 19:45:05 +0800 [thread overview]
Message-ID: <56FBBC41.5080104@rock-chips.com> (raw)
In-Reply-To: <1459322696-29919-1-git-send-email-guodong.xu-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
+ Heiko
On 2016/3/30 15:24, Guodong Xu wrote:
> mmc controller registers may in abnormal state if mmc is used in
> bootloader, eg. to load kernel from eMMC. Some controllers cann't
> clear their registers when clk is set. They use dedicated reset
> logics to do this.
>
> In this patch, a 'resets' property is added into dw_mmc dts
> node. When driver does parse_dt and probe, it calls reset API to
> deassert the 'reset' of dw_mmc host controller. When probe error or
> remove, it calls reset API to assert it.
>
> Chip vendor's actual reset logics is implemented in reset driver, not
> in dw_mmc code.
>
> Please also refer to Documentation/devicetree/bindings/reset/reset.txt
>
> Guodong Xu (2):
> Documentation: synopsys-dw-mshc: add binding for resets
> mmc: dw_mmc: add resets support to dw_mmc
>
> .../devicetree/bindings/mmc/synopsys-dw-mshc.txt | 4 ++++
> drivers/mmc/host/dw_mmc.c | 20 +++++++++++++++++++-
> include/linux/mmc/dw_mmc.h | 6 ++++--
> 3 files changed, 27 insertions(+), 3 deletions(-)
>
--
Best Regards
Shawn Lin
--
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next prev parent reply other threads:[~2016-03-30 11:45 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-30 7:24 [PATCH v3 0/2] mmc: dw_mmc: controller reset support Guodong Xu
2016-03-30 7:24 ` [PATCH v3 1/2] Documentation: synopsys-dw-mshc: add binding for resets Guodong Xu
2016-03-30 7:24 ` [PATCH v3 2/2] mmc: dw_mmc: add resets support to dw_mmc Guodong Xu
2016-03-30 11:40 ` Jaehoon Chung
2016-04-01 18:42 ` Heiko Stuebner
2016-04-02 12:11 ` Guodong Xu
2016-04-04 3:54 ` Jaehoon Chung
2016-04-01 18:42 ` Heiko Stuebner
2016-04-02 13:39 ` Guodong Xu
2016-04-02 14:03 ` Heiko Stuebner
2016-05-25 13:33 ` Guodong Xu
2016-03-30 11:45 ` Shawn Lin [this message]
2016-03-30 11:45 ` [PATCH v3 0/2] mmc: dw_mmc: controller reset support Shawn Lin
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