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From: Maxime Ripard <maxime.ripard@free-electrons.com>
To: Chen-Yu Tsai <wens@csie.org>, Mike Turquette <mturquette@linaro.org>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>,
	netdev@vger.kernel.org, Rob Herring <rob.herring@calxeda.com>,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com,
	Srinivas Kandagatla <srinivas.kandagatla@st.com>
Subject: Re: [PATCH 04/10] net: stmmac: sunxi platfrom extensions for GMAC in Allwinner A20 SoC's
Date: Sat, 7 Dec 2013 11:27:10 +0100	[thread overview]
Message-ID: <20131207102710.GK24519@lukather> (raw)
In-Reply-To: <1386350983-13281-5-git-send-email-wens@csie.org>

[-- Attachment #1: Type: text/plain, Size: 2511 bytes --]

Chen-Yu, Mike,

On Sat, Dec 07, 2013 at 01:29:37AM +0800, Chen-Yu Tsai wrote:
> The Allwinner A20 has an ethernet controller that seems to be
> an early version of Synopsys DesignWare MAC 10/100/1000 Universal,
> which is supported by the stmmac driver.
> 
> Allwinner's GMAC requires setting additional registers in the SoC's
> clock control unit.
> 
> The exact version of the DWMAC IP that Allwinner uses is unknown,
> thus the exact feature set is unknown.
> 
> Signed-off-by: Chen-Yu Tsai <wens@csie.org>
> ---
>  .../bindings/net/allwinner,sun7i-gmac.txt          | 22 +++++++
>  drivers/net/ethernet/stmicro/stmmac/Kconfig        | 12 ++++
>  drivers/net/ethernet/stmicro/stmmac/Makefile       |  1 +
>  drivers/net/ethernet/stmicro/stmmac/dwmac-sunxi.c  | 76 ++++++++++++++++++++++
>  drivers/net/ethernet/stmicro/stmmac/stmmac.h       |  3 +
>  .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |  3 +
>  6 files changed, 117 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/allwinner,sun7i-gmac.txt b/Documentation/devicetree/bindings/net/allwinner,sun7i-gmac.txt
> new file mode 100644
> index 0000000..271554a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/allwinner,sun7i-gmac.txt
> @@ -0,0 +1,22 @@
> +* Allwinner GMAC ethernet controller
> +
> +This device is a platform glue layer for stmmac.
> +Please see stmmac.txt for the other unchanged properties.
> +
> +Required properties:
> + - compatible:  Should be "allwinner,sun7i-gmac"

Please use sun7i-a20-gmac here.

> + - reg: Address and length of register set for the device and corresponding
> +   clock control
>
> +Examples:
> +
> +	gmac: ethernet@01c50000 {
> +		compatible = "allwinner,sun7i-gmac";
> +		reg = <0x01c50000 0x10000>,
> +		      <0x01c20164 0x4>;

This is actually a clock, and should probably be registered in the
common clock framework.

Mike: This small register actually is a regular muxer/divider, except
that it has some bits that are of interest to the ethernet controller
(for example to set wether it's using GMII or RGMII to communicate
with the phy), that, as far as I'm aware of, aren't really fitting
into the CCF.

Do you have some recommendation on how to proceed?

Maybe make a thin "real" clock driver in this hardware glue, that
provides !exported function to set this *GMII thing.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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WARNING: multiple messages have this Message-ID (diff)
From: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
To: Chen-Yu Tsai <wens-jdAy2FN1RRM@public.gmane.org>,
	Mike Turquette
	<mturquette-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: Giuseppe Cavallaro <peppe.cavallaro-qxv4g6HH51o@public.gmane.org>,
	netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Rob Herring <rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>,
	devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org,
	Srinivas Kandagatla
	<srinivas.kandagatla-qxv4g6HH51o@public.gmane.org>
Subject: Re: [PATCH 04/10] net: stmmac: sunxi platfrom extensions for GMAC in Allwinner A20 SoC's
Date: Sat, 7 Dec 2013 11:27:10 +0100	[thread overview]
Message-ID: <20131207102710.GK24519@lukather> (raw)
In-Reply-To: <1386350983-13281-5-git-send-email-wens-jdAy2FN1RRM@public.gmane.org>

[-- Attachment #1: Type: text/plain, Size: 2531 bytes --]

Chen-Yu, Mike,

On Sat, Dec 07, 2013 at 01:29:37AM +0800, Chen-Yu Tsai wrote:
> The Allwinner A20 has an ethernet controller that seems to be
> an early version of Synopsys DesignWare MAC 10/100/1000 Universal,
> which is supported by the stmmac driver.
> 
> Allwinner's GMAC requires setting additional registers in the SoC's
> clock control unit.
> 
> The exact version of the DWMAC IP that Allwinner uses is unknown,
> thus the exact feature set is unknown.
> 
> Signed-off-by: Chen-Yu Tsai <wens-jdAy2FN1RRM@public.gmane.org>
> ---
>  .../bindings/net/allwinner,sun7i-gmac.txt          | 22 +++++++
>  drivers/net/ethernet/stmicro/stmmac/Kconfig        | 12 ++++
>  drivers/net/ethernet/stmicro/stmmac/Makefile       |  1 +
>  drivers/net/ethernet/stmicro/stmmac/dwmac-sunxi.c  | 76 ++++++++++++++++++++++
>  drivers/net/ethernet/stmicro/stmmac/stmmac.h       |  3 +
>  .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |  3 +
>  6 files changed, 117 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/allwinner,sun7i-gmac.txt b/Documentation/devicetree/bindings/net/allwinner,sun7i-gmac.txt
> new file mode 100644
> index 0000000..271554a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/allwinner,sun7i-gmac.txt
> @@ -0,0 +1,22 @@
> +* Allwinner GMAC ethernet controller
> +
> +This device is a platform glue layer for stmmac.
> +Please see stmmac.txt for the other unchanged properties.
> +
> +Required properties:
> + - compatible:  Should be "allwinner,sun7i-gmac"

Please use sun7i-a20-gmac here.

> + - reg: Address and length of register set for the device and corresponding
> +   clock control
>
> +Examples:
> +
> +	gmac: ethernet@01c50000 {
> +		compatible = "allwinner,sun7i-gmac";
> +		reg = <0x01c50000 0x10000>,
> +		      <0x01c20164 0x4>;

This is actually a clock, and should probably be registered in the
common clock framework.

Mike: This small register actually is a regular muxer/divider, except
that it has some bits that are of interest to the ethernet controller
(for example to set wether it's using GMII or RGMII to communicate
with the phy), that, as far as I'm aware of, aren't really fitting
into the CCF.

Do you have some recommendation on how to proceed?

Maybe make a thin "real" clock driver in this hardware glue, that
provides !exported function to set this *GMII thing.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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WARNING: multiple messages have this Message-ID (diff)
From: maxime.ripard@free-electrons.com (Maxime Ripard)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 04/10] net: stmmac: sunxi platfrom extensions for GMAC in Allwinner A20 SoC's
Date: Sat, 7 Dec 2013 11:27:10 +0100	[thread overview]
Message-ID: <20131207102710.GK24519@lukather> (raw)
In-Reply-To: <1386350983-13281-5-git-send-email-wens@csie.org>

Chen-Yu, Mike,

On Sat, Dec 07, 2013 at 01:29:37AM +0800, Chen-Yu Tsai wrote:
> The Allwinner A20 has an ethernet controller that seems to be
> an early version of Synopsys DesignWare MAC 10/100/1000 Universal,
> which is supported by the stmmac driver.
> 
> Allwinner's GMAC requires setting additional registers in the SoC's
> clock control unit.
> 
> The exact version of the DWMAC IP that Allwinner uses is unknown,
> thus the exact feature set is unknown.
> 
> Signed-off-by: Chen-Yu Tsai <wens@csie.org>
> ---
>  .../bindings/net/allwinner,sun7i-gmac.txt          | 22 +++++++
>  drivers/net/ethernet/stmicro/stmmac/Kconfig        | 12 ++++
>  drivers/net/ethernet/stmicro/stmmac/Makefile       |  1 +
>  drivers/net/ethernet/stmicro/stmmac/dwmac-sunxi.c  | 76 ++++++++++++++++++++++
>  drivers/net/ethernet/stmicro/stmmac/stmmac.h       |  3 +
>  .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |  3 +
>  6 files changed, 117 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/allwinner,sun7i-gmac.txt b/Documentation/devicetree/bindings/net/allwinner,sun7i-gmac.txt
> new file mode 100644
> index 0000000..271554a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/allwinner,sun7i-gmac.txt
> @@ -0,0 +1,22 @@
> +* Allwinner GMAC ethernet controller
> +
> +This device is a platform glue layer for stmmac.
> +Please see stmmac.txt for the other unchanged properties.
> +
> +Required properties:
> + - compatible:  Should be "allwinner,sun7i-gmac"

Please use sun7i-a20-gmac here.

> + - reg: Address and length of register set for the device and corresponding
> +   clock control
>
> +Examples:
> +
> +	gmac: ethernet at 01c50000 {
> +		compatible = "allwinner,sun7i-gmac";
> +		reg = <0x01c50000 0x10000>,
> +		      <0x01c20164 0x4>;

This is actually a clock, and should probably be registered in the
common clock framework.

Mike: This small register actually is a regular muxer/divider, except
that it has some bits that are of interest to the ethernet controller
(for example to set wether it's using GMII or RGMII to communicate
with the phy), that, as far as I'm aware of, aren't really fitting
into the CCF.

Do you have some recommendation on how to proceed?

Maybe make a thin "real" clock driver in this hardware glue, that
provides !exported function to set this *GMII thing.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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  reply	other threads:[~2013-12-07 10:30 UTC|newest]

Thread overview: 189+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-12-06 17:29 [PATCH 00/10] net: stmmac: Add sun7i GMAC glue layer Chen-Yu Tsai
2013-12-06 17:29 ` Chen-Yu Tsai
2013-12-06 17:29 ` Chen-Yu Tsai
2013-12-06 17:29 ` [PATCH 01/10] net: stmmac: Enable stmmac main clock when probing hardware Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-07 10:33   ` Maxime Ripard
2013-12-07 10:33     ` Maxime Ripard
2013-12-07 10:33     ` Maxime Ripard
2013-12-09  2:43     ` Chen-Yu Tsai
2013-12-09  2:43       ` Chen-Yu Tsai
2013-12-09  2:43       ` Chen-Yu Tsai
2013-12-09 10:09       ` [linux-sunxi] " Hans de Goede
2013-12-09 10:09         ` Hans de Goede
2013-12-09 10:09         ` Hans de Goede
2013-12-10 20:05       ` Maxime Ripard
2013-12-10 20:05         ` Maxime Ripard
2013-12-10 20:05         ` Maxime Ripard
2013-12-12  4:31         ` Chen-Yu Tsai
2013-12-12  4:31           ` Chen-Yu Tsai
2013-12-12  4:31           ` Chen-Yu Tsai
2013-12-09  7:14   ` Giuseppe CAVALLARO
2013-12-09  7:14     ` Giuseppe CAVALLARO
2013-12-09  7:14     ` Giuseppe CAVALLARO
2013-12-09  7:26     ` Chen-Yu Tsai
2013-12-09  7:26       ` Chen-Yu Tsai
2013-12-09  7:26       ` Chen-Yu Tsai
2013-12-06 17:29 ` [PATCH 02/10] net: stmmac: Honor DT parameter to force DMA store and forward mode Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-06 21:26   ` David Miller
2013-12-06 21:26     ` David Miller
     [not found]     ` <20131206.162606.2277176361893801778.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2013-12-07  1:19       ` Chen-Yu Tsai
2013-12-07  1:23     ` Chen-Yu Tsai
2013-12-07  1:23       ` Chen-Yu Tsai
2013-12-07  1:23       ` Chen-Yu Tsai
2013-12-07 10:07       ` maxime.ripard
2013-12-07 10:07         ` maxime.ripard
2013-12-07 10:07         ` maxime.ripard
2013-12-07 11:06         ` Tomasz Figa
2013-12-07 11:06           ` Tomasz Figa
2013-12-07 11:06           ` Tomasz Figa
2013-12-09  2:59           ` [linux-sunxi] " Chen-Yu Tsai
2013-12-09  2:59             ` Chen-Yu Tsai
2013-12-09  2:59             ` Chen-Yu Tsai
2013-12-10 20:10             ` [linux-sunxi] " maxime.ripard
2013-12-10 20:10               ` maxime.ripard
2013-12-10 20:10               ` maxime.ripard
2013-12-06 17:29 ` [PATCH 03/10] net: stmmac: Use platform data tied with compatible strings Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-06 21:26   ` David Miller
2013-12-06 21:26     ` David Miller
2013-12-07  2:13     ` Chen-Yu Tsai
2013-12-07  2:13       ` Chen-Yu Tsai
2013-12-07  2:13       ` Chen-Yu Tsai
2013-12-06 17:29 ` [PATCH 04/10] net: stmmac: sunxi platfrom extensions for GMAC in Allwinner A20 SoC's Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-07 10:27   ` Maxime Ripard [this message]
2013-12-07 10:27     ` Maxime Ripard
2013-12-07 10:27     ` Maxime Ripard
2013-12-07 11:12     ` Tomasz Figa
2013-12-07 11:12       ` Tomasz Figa
2013-12-07 11:12       ` Tomasz Figa
2013-12-07 11:46       ` Maxime Ripard
2013-12-07 11:46         ` Maxime Ripard
2013-12-07 11:46         ` Maxime Ripard
2013-12-07 12:50         ` Tomasz Figa
2013-12-07 12:50           ` Tomasz Figa
2013-12-07 12:50           ` Tomasz Figa
2013-12-07 13:34           ` [linux-sunxi] " Emilio López
2013-12-07 13:34             ` Emilio López
2013-12-07 13:34             ` Emilio López
2013-12-09 11:10   ` srinivas kandagatla
2013-12-09 11:10     ` srinivas kandagatla
2013-12-09 11:10     ` srinivas kandagatla
2013-12-09 16:16     ` [linux-sunxi] " Hans de Goede
2013-12-09 16:16       ` Hans de Goede
2013-12-09 16:16       ` Hans de Goede
2013-12-09 17:56       ` [linux-sunxi] " Chen-Yu Tsai
2013-12-09 17:56         ` Chen-Yu Tsai
2013-12-09 17:56         ` Chen-Yu Tsai
2013-12-09 19:04         ` [linux-sunxi] " Hans de Goede
2013-12-09 19:04           ` Hans de Goede
2013-12-09 19:04           ` Hans de Goede
2013-12-10 20:14           ` [linux-sunxi] " Maxime Ripard
2013-12-10 20:14             ` Maxime Ripard
2013-12-10 20:14             ` Maxime Ripard
2013-12-09 17:34     ` Chen-Yu Tsai
2013-12-09 17:34       ` Chen-Yu Tsai
2013-12-09 17:34       ` Chen-Yu Tsai
2013-12-10 14:59       ` srinivas kandagatla
2013-12-10 14:59         ` srinivas kandagatla
2013-12-10 14:59         ` srinivas kandagatla
2013-12-10 20:23         ` Maxime Ripard
2013-12-10 20:23           ` Maxime Ripard
2013-12-10 20:23           ` Maxime Ripard
2013-12-11 12:17         ` Chen-Yu Tsai
2013-12-11 12:17           ` Chen-Yu Tsai
2013-12-11 12:17           ` Chen-Yu Tsai
2013-12-11 14:45           ` srinivas kandagatla
2013-12-11 14:45             ` srinivas kandagatla
2013-12-11 14:45             ` srinivas kandagatla
2013-12-12  7:27             ` Chen-Yu Tsai
2013-12-12  7:27               ` Chen-Yu Tsai
2013-12-12  7:27               ` Chen-Yu Tsai
2013-12-12  9:04             ` Maxime Ripard
2013-12-12  9:04               ` Maxime Ripard
2013-12-12  9:04               ` Maxime Ripard
2013-12-12 10:31               ` Chen-Yu Tsai
2013-12-12 10:31                 ` Chen-Yu Tsai
2013-12-12 10:31                 ` Chen-Yu Tsai
2013-12-13 10:38                 ` Maxime Ripard
2013-12-13 10:38                   ` Maxime Ripard
2013-12-13 10:38                   ` Maxime Ripard
2013-12-24  3:27                   ` [linux-sunxi] " Chen-Yu Tsai
2013-12-24  3:27                     ` Chen-Yu Tsai
2013-12-24  3:27                     ` Chen-Yu Tsai
2014-01-02 13:11                     ` [linux-sunxi] " srinivas kandagatla
2014-01-02 13:11                       ` srinivas kandagatla
2014-01-02 13:11                       ` srinivas kandagatla
2014-01-07 10:24                       ` [linux-sunxi] " Chen-Yu Tsai
2014-01-07 10:24                         ` Chen-Yu Tsai
2014-01-07 10:24                         ` Chen-Yu Tsai
2013-12-09 11:21   ` srinivas kandagatla
2013-12-09 11:21     ` srinivas kandagatla
2013-12-09 11:21     ` srinivas kandagatla
2013-12-09 13:44     ` Sergei Shtylyov
2013-12-09 13:44       ` Sergei Shtylyov
2013-12-09 13:44       ` Sergei Shtylyov
2013-12-09 15:45       ` [linux-sunxi] " Chen-Yu Tsai
2013-12-09 15:45         ` Chen-Yu Tsai
2013-12-09 15:45         ` Chen-Yu Tsai
2013-12-06 17:29 ` [PATCH 05/10] ARM: dts: sun7i: Add GMAC controller node to sun7i DTSI Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-06 17:29 ` [PATCH 06/10] ARM: dts: sun7i: Add pin muxing options for the GMAC Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-06 17:29 ` [PATCH 07/10] ARM: dts: sun7i: cubietruck: Enable " Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-06 21:09   ` Florian Fainelli
2013-12-06 21:09     ` Florian Fainelli
2013-12-06 21:09     ` Florian Fainelli
2013-12-07  1:35     ` Chen-Yu Tsai
2013-12-07  1:35       ` Chen-Yu Tsai
2013-12-07  1:35       ` Chen-Yu Tsai
2013-12-07  1:57       ` Florian Fainelli
2013-12-07  1:57         ` Florian Fainelli
2013-12-07  1:57         ` Florian Fainelli
2013-12-09  2:55         ` Chen-Yu Tsai
2013-12-09  2:55           ` Chen-Yu Tsai
2013-12-09  2:55           ` Chen-Yu Tsai
2013-12-09 17:48           ` Florian Fainelli
2013-12-09 17:48             ` Florian Fainelli
2013-12-09 17:48             ` Florian Fainelli
2013-12-10  4:11             ` Chen-Yu Tsai
2013-12-10  4:11               ` Chen-Yu Tsai
2013-12-10  4:11               ` Chen-Yu Tsai
2013-12-10 17:23               ` Florian Fainelli
2013-12-10 17:23                 ` Florian Fainelli
2013-12-10 17:23                 ` Florian Fainelli
2013-12-13 10:21         ` Giuseppe CAVALLARO
2013-12-13 10:21           ` Giuseppe CAVALLARO
2013-12-13 10:21           ` Giuseppe CAVALLARO
2013-12-13 10:21           ` Giuseppe CAVALLARO
2013-12-06 17:29 ` [PATCH 08/10] ARM: dts: sun7i: cubieboard2: Enable GMAC instead of EMAC Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-06 21:10   ` Florian Fainelli
2013-12-06 21:10     ` Florian Fainelli
2013-12-06 21:10     ` Florian Fainelli
2013-12-06 17:29 ` [PATCH 09/10] ARM: dts: sun7i: olinuxino-micro: " Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-06 17:29 ` [PATCH 10/10] ARM: dts: sun7i: Add ethernet alias for GMAC Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-06 17:29   ` Chen-Yu Tsai
2013-12-07 10:15   ` Maxime Ripard
2013-12-07 10:15     ` Maxime Ripard
2013-12-07 10:15     ` Maxime Ripard
2013-12-07 16:20     ` Chen-Yu Tsai
2013-12-07 16:20       ` Chen-Yu Tsai
2013-12-07 16:20       ` Chen-Yu Tsai
2013-12-06 20:52 ` [linux-sunxi] [PATCH 00/10] net: stmmac: Add sun7i GMAC glue layer Michal Suchanek
2013-12-06 20:52   ` Michal Suchanek
2013-12-06 20:52   ` Michal Suchanek

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all data and code used by this external index.