On Tue, Dec 20, 2016 at 05:09:44PM -0500, Murali Karicheri wrote:
> From: WingMan Kwok <w-kwok2@xxxxxx>
>
> 10gbe phy driver needs to access the 10gbe subsystem control
> register during phy initialization. To facilitate the shared
> access of the subsystem register region between the 10gbe Ethernet
> driver and the phy driver, this patch adds support of the
> subsystem register region defined by a syscon node in the dts.
>
> Although there is no shared access to the gbe subsystem register
> region, using syscon for that is for the sake of consistency.
>
> This change is backward compatible with previously released gbe
> devicetree bindings.
>
> Signed-off-by: WingMan Kwok <w-kwok2@xxxxxx>
> Signed-off-by: Murali Karicheri <m-karicheri2@xxxxxx>
> Signed-off-by: Sekhar Nori <nsekhar@xxxxxx>
> ---
> .../devicetree/bindings/net/keystone-netcp.txt | 16 ++-
> drivers/net/ethernet/ti/netcp_ethss.c | 140 +++++++++++++++++----
> 2 files changed, 127 insertions(+), 29 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/net/keystone-netcp.txt b/Documentation/devicetree/bindings/net/keystone-netcp.txt
> index 04ba1dc..0854a73 100644
> --- a/Documentation/devicetree/bindings/net/keystone-netcp.txt
> +++ b/Documentation/devicetree/bindings/net/keystone-netcp.txt
> @@ -72,20 +72,24 @@ Required properties:
> "ti,netcp-gbe-2" for 1GbE N NetCP 1.5 (N=2)
> "ti,netcp-xgbe" for 10 GbE
>
> +- syscon-subsys: phandle to syscon node of the switch
> + subsystem registers.
> +
> - reg: register location and the size for the following register
> regions in the specified order.
> - switch subsystem registers
> + - sgmii module registers
This needs to go on the end of the list. Otherwise, it is not backwards
compatible.
> - sgmii port3/4 module registers (only for NetCP 1.4)
> - switch module registers
> - serdes registers (only for 10G)
>
> NetCP 1.4 ethss, here is the order
> - index #0 - switch subsystem registers
> + index #0 - sgmii module registers
> index #1 - sgmii port3/4 module registers
> index #2 - switch module registers
>
> NetCP 1.5 ethss 9 port, 5 port and 2 port
> - index #0 - switch subsystem registers
> + index #0 - sgmii module registers
> index #1 - switch module registers
> index #2 - serdes registers
>
> @@ -145,6 +149,11 @@ Optional properties:
>
> Example binding:
>
> +gbe_subsys: subsys@2090000 {
> + compatible = "syscon";
> + reg = <0x02090000 0x100>;
> +};
> +
> netcp: netcp@2000000 {
> reg = <0x2620110 0x8>;
> reg-names = "efuse";
> @@ -163,7 +172,8 @@ netcp: netcp@2000000 {
> ranges;
> gbe@90000 {
> label = "netcp-gbe";
> - reg = <0x90000 0x300>, <0x90400 0x400>, <0x90800 0x700>;
> + syscon-subsys = <&gbe_subsys>;
> + reg = <0x90100 0x200>, <0x90400 0x200>, <0x90800 0x700>;
> /* enable-ale; */
> tx-queue = <648>;
> tx-channel = <8>;
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