| Message ID | 20211007080934.108804-14-chanho61.park@samsung.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | introduce exynosauto v9 ufs driver | expand |
On Thu, Oct 07, 2021 at 05:09:31PM +0900, Chanho Park wrote: > Add "samsung,sysreg" regmap and the offset to the ufs shareaibility > register for setting io coherency of the samsung ufs. "dma-coherent" > property is also required because the driver code needs to know. > > Cc: Rob Herring <robh+dt@kernel.org> > Cc: devicetree@vger.kernel.org > Signed-off-by: Chanho Park <chanho61.park@samsung.com> > --- > .../devicetree/bindings/ufs/samsung,exynos-ufs.yaml | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml b/Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml > index b9ca8ef4f2be..d9b7535b872f 100644 > --- a/Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml > +++ b/Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml > @@ -54,6 +54,17 @@ properties: > phy-names: > const: ufs-phy > > + samsung,sysreg: > + $ref: '/schemas/types.yaml#/definitions/phandle' > + description: phandle for FSYSx sysreg interface, used to control > + sysreg register bit for UFS IO Coherency > + > + samsung,ufs-shareability-reg-offset: > + $ref: '/schemas/types.yaml#/definitions/uint32' > + description: Offset to the shareability register for io-coherency Make these a single property: <phandle offset> > + > + dma-coherent: true > + > required: > - compatible > - reg > -- > 2.33.0 > >
> > + samsung,sysreg: > > + $ref: '/schemas/types.yaml#/definitions/phandle' > > + description: phandle for FSYSx sysreg interface, used to control > > + sysreg register bit for UFS IO Coherency > > + > > + samsung,ufs-shareability-reg-offset: > > + $ref: '/schemas/types.yaml#/definitions/uint32' > > + description: Offset to the shareability register for io-coherency > > Make these a single property: <phandle offset> As I already mentioned previous e-mail [1], I need to support two ufs instances for exynosauto v9 soc. syscon_fsys2: syscon@17c20000 { compatible = "samsung,exynosautov9-sysreg", "syscon"; reg = <0x17c20000 0x1000>; }; ufs_0: ufs0@17e00000 { <snip> samsung,sysreg = <&syscon_fsys2>; samsung,ufs-shareability-reg-offset = <0x710>; }; To be added ufs_1 like below ufs_1: ufs0@17f00000 { <snip> samsung,sysreg = <&syscon_fsys2>; samsung,ufs-shareability-reg-offset = <0x714>; }; [1]: https://lore.kernel.org/linux-scsi/000901d7b0e0$e618b220$b24a1660$@samsung.c om/ If you prefer them to be separated sysreg phandles which directly pointing the register, I'm able to change it. But, the syscon_fsys2 can be used for other IPs as well such as ethernet. Best Regards, Chanho Park
> > > + samsung,sysreg: > > > + $ref: '/schemas/types.yaml#/definitions/phandle' > > > + description: phandle for FSYSx sysreg interface, used to control > > > + sysreg register bit for UFS IO Coherency > > > + > > > + samsung,ufs-shareability-reg-offset: > > > + $ref: '/schemas/types.yaml#/definitions/uint32' > > > + description: Offset to the shareability register for > > > + io-coherency > > > > Make these a single property: <phandle offset> > > As I already mentioned previous e-mail [1], I need to support two ufs > instances for exynosauto v9 soc. > > syscon_fsys2: syscon@17c20000 { > compatible = "samsung,exynosautov9-sysreg", "syscon"; > reg = <0x17c20000 0x1000>; > }; > > ufs_0: ufs0@17e00000 { > <snip> > samsung,sysreg = <&syscon_fsys2>; > samsung,ufs-shareability-reg-offset = <0x710>; }; > > To be added ufs_1 like below > ufs_1: ufs0@17f00000 { > <snip> > samsung,sysreg = <&syscon_fsys2>; > samsung,ufs-shareability-reg-offset = <0x714>; }; > > [1]: https://lore.kernel.org/linux- > scsi/000901d7b0e0$e618b220$b24a1660$@samsung.com/ > > If you prefer them to be separated sysreg phandles which directly pointing > the register, I'm able to change it. > But, the syscon_fsys2 can be used for other IPs as well such as ethernet. Finally, I got your point. You want me to drop "samsung,ufs-shareability-reg-offset" and put the offset like below. ufs_0: ufs0@17e00000 { <snip> samsung,sysreg = <&syscon_fsys2 0x710>; To be added ufs_1 like below ufs_1: ufs0@17f00000 { <snip> samsung,sysreg = <&syscon_fsys2 0x714>; I'll resend the patch with your suggestion. Krzysztof, could you please hold below on? Or Do I need to make an additional patch? https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux.git/commit/?h=nex t/dt64&id=31bbac5263aa63dfc8bfed2180bb6a5a3c531681 Best Regards, Chanho Park
On Sun, Oct 17, 2021 at 7:27 PM Chanho Park <chanho61.park@samsung.com> wrote: > > > > + samsung,sysreg: > > > + $ref: '/schemas/types.yaml#/definitions/phandle' > > > + description: phandle for FSYSx sysreg interface, used to control > > > + sysreg register bit for UFS IO Coherency > > > + > > > + samsung,ufs-shareability-reg-offset: > > > + $ref: '/schemas/types.yaml#/definitions/uint32' > > > + description: Offset to the shareability register for io-coherency > > > > Make these a single property: <phandle offset> > > As I already mentioned previous e-mail [1], I need to support two ufs > instances for exynosauto v9 soc. Don't expect me to remember. That was 100s of reviews ago. > > syscon_fsys2: syscon@17c20000 { > compatible = "samsung,exynosautov9-sysreg", "syscon"; > reg = <0x17c20000 0x1000>; > }; > > ufs_0: ufs0@17e00000 { > <snip> > samsung,sysreg = <&syscon_fsys2>; > samsung,ufs-shareability-reg-offset = <0x710>; samsung,ufs-shareability-reg = <&syscon_fsys2 0x710>; > }; > > To be added ufs_1 like below > ufs_1: ufs0@17f00000 { > <snip> > samsung,sysreg = <&syscon_fsys2>; > samsung,ufs-shareability-reg-offset = <0x714>; samsung,ufs-shareability-reg = <&syscon_fsys2 0x714>; I still don't see what's the problem? > }; > > [1]: > https://lore.kernel.org/linux-scsi/000901d7b0e0$e618b220$b24a1660$@samsung.c > om/ > > If you prefer them to be separated sysreg phandles which directly pointing > the register, I'm able to change it. > But, the syscon_fsys2 can be used for other IPs as well such as ethernet. > > Best Regards, > Chanho Park >
diff --git a/Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml b/Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml index b9ca8ef4f2be..d9b7535b872f 100644 --- a/Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml +++ b/Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml @@ -54,6 +54,17 @@ properties: phy-names: const: ufs-phy + samsung,sysreg: + $ref: '/schemas/types.yaml#/definitions/phandle' + description: phandle for FSYSx sysreg interface, used to control + sysreg register bit for UFS IO Coherency + + samsung,ufs-shareability-reg-offset: + $ref: '/schemas/types.yaml#/definitions/uint32' + description: Offset to the shareability register for io-coherency + + dma-coherent: true + required: - compatible - reg
Add "samsung,sysreg" regmap and the offset to the ufs shareaibility register for setting io coherency of the samsung ufs. "dma-coherent" property is also required because the driver code needs to know. Cc: Rob Herring <robh+dt@kernel.org> Cc: devicetree@vger.kernel.org Signed-off-by: Chanho Park <chanho61.park@samsung.com> --- .../devicetree/bindings/ufs/samsung,exynos-ufs.yaml | 11 +++++++++++ 1 file changed, 11 insertions(+)