linux-kernel - Re: [PATCH 1/5] phy: miphy365x: Add Device Tree bindings for the MiPHY365x

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Date:	Wed, 2 Jul 2014 14:54:45 +0530
From:	Kishon Vijay Abraham I <kishon@...com>
To:	Lee Jones <lee.jones@...aro.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
CC:	<kernel@...inux.com>
Subject: Re: [PATCH 1/5] phy: miphy365x: Add Device Tree bindings for the
 MiPHY365x

Hi,

On Monday 30 June 2014 06:31 PM, Lee Jones wrote:
> The MiPHY365x is a Generic PHY which can serve various SATA or PCIe
> devices. It has 2 ports which it can use for either; both SATA, both
> PCIe or one of each in any configuration.
> 
> Cc: Kishon Vijay Abraham I <kishon@...com>
> Acked-by: Mark Rutland <mark.rutland@....com>
> Acked-by: Alexandre Torgue <alexandre.torgue@...com>
> Signed-off-by: Lee Jones <lee.jones@...aro.org>
> ---
>  .../devicetree/bindings/phy/phy-miphy365x.txt      | 76 ++++++++++++++++++++++
>  1 file changed, 76 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/phy-miphy365x.txt
> 
> diff --git a/Documentation/devicetree/bindings/phy/phy-miphy365x.txt b/Documentation/devicetree/bindings/phy/phy-miphy365x.txt
> new file mode 100644
> index 0000000..d75f300
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/phy-miphy365x.txt
> @@ -0,0 +1,76 @@
> +STMicroelectronics STi MIPHY365x PHY binding
> +============================================
> +
> +This binding describes a miphy device that is used to control PHY hardware
> +for SATA and PCIe.
> +
> +Required properties:
> +- compatible :	Should be "st,miphy365x-phy"
> +- #phy-cells :	Should be 2 (See second example)
> +		First cell is the port number from:
> +			- MIPHY_PORT_0
> +			- MIPHY_PORT_1

I'm just thinking if we can directly give phandle to the sub-node
(channel0/channel1 or port0/port1) we won't need this information in the PHY
specifier. This might need some modification in the phy-core but that can be done.
> +		Second cell is device type from:
> +			- MIPHY_TYPE_SATA
> +			- MIPHY_TYPE_PCI
> +- reg       :	Address and length of register sets for each device in
> +		"reg-names"
> +- reg-names : 	The names of the register addresses corresponding to the
> +		registers filled in "reg", from:
> +			- sata0: For SATA port 0 registers
> +			- sata1: For SATA port 1 registers
> +			- pcie0: For PCIE port 0 registers
> +			- pcie1: For PCIE port 1 registers

this information should be in the documentation of sub-nodes.

Cheers
Kishon
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