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X-MS-Exchange-CrossTenant-Network-Message-Id: 263a6193-2960-48a3-b836-08d6431f7fd3 X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c;Ip=[149.199.60.83];Helo=[xsj-pvapsmtpgw01] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR0201MB3511 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Boris, On 05. 11. 18 13:56, Borislav Petkov wrote: > On Thu, Oct 25, 2018 at 11:37:00AM +0530, Manish Narani wrote: >> Add ddrc memory controller node in dts. The size mentioned in dts is >> 0x30000, because we need to access DDR_QOS INTR registers located at >> 0xFD090208 from this driver. >> >> Signed-off-by: Manish Narani >> --- >> arch/arm64/boot/dts/xilinx/zynqmp.dtsi | 7 +++++++ >> 1 file changed, 7 insertions(+) >> >> diff --git a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi >> index 29ce234..a81d3b16 100644 >> --- a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi >> +++ b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi >> @@ -355,6 +355,13 @@ >> xlnx,bus-width = <64>; >> }; >> >> + mc: memory-controller@fd070000 { >> + compatible = "xlnx,zynqmp-ddrc-2.40a"; >> + reg = <0x0 0xfd070000 0x0 0x30000>; >> + interrupt-parent = <&gic>; >> + interrupts = <0 112 4>; >> + }; >> + >> gem0: ethernet@ff0b0000 { >> compatible = "cdns,zynqmp-gem", "cdns,gem"; >> status = "disabled"; >> -- > > Ok, talking to Mark on IRC, he says those DT changes normally go through > the arm-soc tree. > > And I'm fine with that except if we do that, then the EDAC changes > go through my tree and those drivers could end up temporarily broken > depending on the merge order and timing. I don't think that driver will be broken. You can build them, use them on out of tree HW. And when this patch is merged to mainline it will be enabled for xilinx soc. > > So should we perhaps make an arm-soc shared, immutable branch which you > guys export for me with those DT changes applied, which I can merge into > my tree and apply the EDAC changes ontop. > > This is what we've been doing with the tip tree until now and it has > proven successful. > > Thoughts? Normally driver is merged via appropriate subsystem with DT binding doc and enabled for the soc/platform later. Also in connection to process which you have described above. DT node should match binding which is in your tree and should go first and then enabling for certain SoC on the top. TBH I can't see any reason to do merges but if you want to do that way we can also do it. Thanks, Michal