| Message ID | 20191117072109.20402-7-afaerber@suse.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ARM: Initial RTD1195 and MeLE X1000 support | expand |
Hi Andreas, > + reset1: reset-controller@0 { > + compatible = "snps,dw-low-reset"; > + reg = <0x0 0x4>; > + #reset-cells = <1>; > + }; > + > + reset2: reset-controller@4 { > + compatible = "snps,dw-low-reset"; > + reg = <0x4 0x4>; > + #reset-cells = <1>; > + }; > + > + reset3: reset-controller@8 { > + compatible = "snps,dw-low-reset"; > + reg = <0x8 0x4>; > + #reset-cells = <1>; > + }; > + > + iso_reset: reset-controller@7088 { > + compatible = "snps,dw-low-reset"; > + reg = <0x7088 0x4>; > + #reset-cells = <1>; > + }; > + We don't use the DesignWare IP for the reset controller. Regards, James
Hi James, Adding Philipp. Am 18.11.19 um 10:22 schrieb James Tai: >> + reset1: reset-controller@0 { >> + compatible = "snps,dw-low-reset"; >> + reg = <0x0 0x4>; >> + #reset-cells = <1>; >> + }; >> + >> + reset2: reset-controller@4 { >> + compatible = "snps,dw-low-reset"; >> + reg = <0x4 0x4>; >> + #reset-cells = <1>; >> + }; >> + >> + reset3: reset-controller@8 { >> + compatible = "snps,dw-low-reset"; >> + reg = <0x8 0x4>; >> + #reset-cells = <1>; >> + }; >> + >> + iso_reset: reset-controller@7088 { >> + compatible = "snps,dw-low-reset"; >> + reg = <0x7088 0x4>; >> + #reset-cells = <1>; >> + }; >> + > > We don't use the DesignWare IP for the reset controller. Thanks for reviewing. We already merged the equivalent nodes for RTD129x into arm-soc.git. No Realtek review was received back when it was posted [1], sadly. How does your reset controller differ from DesignWare, and how would you prefer to handle it? a) Do you want to send patches for a new Realtek-specific dt-binding [2] and extend reset-simple driver to cover it as a copy&paste of the DesignWare of_device_id? b) Do you believe you need to submit a completely new reset driver? An issue I had raised twice [4, 1] was that reset-simple only allows for contiguous registers and thus couldn't handle the gap between reset3 and reset4 on RTD1295, forcing me to use per-register nodes for consistency. I am against modeling RTD1195 differently from RTD1295+, assuming they're the equivalent IP, so we need a solution that works for both. Philipp did indicate in [4] we could extend reset-simple for this gap "if the implementation could be kept reasonably simple". With v5.4-rc8 already tagged, please hurry if you want a different binding in v5.5. Regards, Andreas [1] https://patchwork.kernel.org/cover/11206255/ [2] https://patchwork.kernel.org/patch/9902665/ [3] https://patchwork.kernel.org/patch/9902673/ [4] https://patchwork.kernel.org/patch/9902675/ [5] https://patchwork.kernel.org/patch/9902671/ [6] https://patchwork.kernel.org/patch/9902663/
Hi Andreas, > > > > We don't use the DesignWare IP for the reset controller. > > Thanks for reviewing. > > We already merged the equivalent nodes for RTD129x into arm-soc.git. > No Realtek review was received back when it was posted [1], sadly. > > How does your reset controller differ from DesignWare, and how would you > prefer to handle it? > > a) Do you want to send patches for a new Realtek-specific dt-binding [2] and > extend reset-simple driver to cover it as a copy&paste of the DesignWare > of_device_id? > > b) Do you believe you need to submit a completely new reset driver? > The RTD1195, RTD1295 and RTD1395 reset controller is compatible with the reset-simple driver. I want to use plan a) for them. Besides, I'll submit a completely new reset driver for the RTD1619 because the reset controller not compatible with the reset-simple driver. Regards, James
diff --git a/arch/arm/boot/dts/rtd1195.dtsi b/arch/arm/boot/dts/rtd1195.dtsi index f5174f828a28..e0f133a1354f 100644 --- a/arch/arm/boot/dts/rtd1195.dtsi +++ b/arch/arm/boot/dts/rtd1195.dtsi @@ -99,6 +99,30 @@ #size-cells = <1>; ranges = <0x0 0x18000000 0x70000>; + reset1: reset-controller@0 { + compatible = "snps,dw-low-reset"; + reg = <0x0 0x4>; + #reset-cells = <1>; + }; + + reset2: reset-controller@4 { + compatible = "snps,dw-low-reset"; + reg = <0x4 0x4>; + #reset-cells = <1>; + }; + + reset3: reset-controller@8 { + compatible = "snps,dw-low-reset"; + reg = <0x8 0x4>; + #reset-cells = <1>; + }; + + iso_reset: reset-controller@7088 { + compatible = "snps,dw-low-reset"; + reg = <0x7088 0x4>; + #reset-cells = <1>; + }; + wdt: watchdog@7680 { compatible = "realtek,rtd1295-watchdog"; reg = <0x7680 0x100>;
Add reset controller nodes for Realtek RTD1195 SoC. Signed-off-by: Andreas Färber <afaerber@suse.de> --- v3: from RTD1295 reset v2 * Rebased onto r-bus - reg, unit address, indentation arch/arm/boot/dts/rtd1195.dtsi | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)