| Message ID | 20210409090711.27358-1-qiangqing.zhang@nxp.com |
|---|---|
| Headers | show |
| Series | net: add new properties for of_get_mac_address from nvmem | expand |
On Fri, Apr 9, 2021 at 4:07 AM Joakim Zhang <qiangqing.zhang@nxp.com> wrote: > > From: Fugang Duan <fugang.duan@nxp.com> > > Currently, of_get_mac_address supports NVMEM, some platforms What's of_get_mac_address? This is a binding patch. Don't mix Linux things in it. > MAC address that read from NVMEM efuse requires to swap bytes > order, so add new property "nvmem_macaddr_swap" to specify the > behavior. If the MAC address is valid from NVMEM, add new property > "nvmem-mac-address" in ethernet node. > > Update these two properties in the binding documentation. > > Signed-off-by: Fugang Duan <fugang.duan@nxp.com> > Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com> > --- > .../bindings/net/ethernet-controller.yaml | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/Documentation/devicetree/bindings/net/ethernet-controller.yaml b/Documentation/devicetree/bindings/net/ethernet-controller.yaml > index e8f04687a3e0..c868c295aabf 100644 > --- a/Documentation/devicetree/bindings/net/ethernet-controller.yaml > +++ b/Documentation/devicetree/bindings/net/ethernet-controller.yaml > @@ -32,6 +32,15 @@ properties: > - minItems: 6 > maxItems: 6 > > + nvmem-mac-address: > + allOf: > + - $ref: /schemas/types.yaml#definitions/uint8-array > + - minItems: 6 > + maxItems: 6 > + description: > + Specifies the MAC address that was read from nvmem-cells and dynamically > + add the property in device node; Why can't you use local-mac-address or mac-address? Those too can come from some other source. > + > max-frame-size: > $ref: /schemas/types.yaml#/definitions/uint32 > description: > @@ -52,6 +61,11 @@ properties: > nvmem-cell-names: > const: mac-address > > + nvmem_macaddr_swap: > + $ref: /schemas/types.yaml#/definitions/flag > + description: > + swap bytes order for the 6 bytes of MAC address So 'nvmem-mac-address' needs to be swapped or it's swapped before writing? In any case, this belongs in the nvmem provider. Rob
Hi Rob, > -----Original Message----- > From: Rob Herring <robh+dt@kernel.org> > Sent: 2021年4月9日 21:50 > To: Joakim Zhang <qiangqing.zhang@nxp.com> > Cc: David Miller <davem@davemloft.net>; Jakub Kicinski <kuba@kernel.org>; > Andrew Lunn <andrew@lunn.ch>; Heiner Kallweit <hkallweit1@gmail.com>; > Russell King <linux@armlinux.org.uk>; Frank Rowand > <frowand.list@gmail.com>; netdev <netdev@vger.kernel.org>; > devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; dl-linux-imx > <linux-imx@nxp.com> > Subject: Re: [PATCH net-next 1/3] dt-bindings: net: add new properties for > of_get_mac_address from nvmem > > On Fri, Apr 9, 2021 at 4:07 AM Joakim Zhang <qiangqing.zhang@nxp.com> > wrote: > > > > From: Fugang Duan <fugang.duan@nxp.com> > > > > Currently, of_get_mac_address supports NVMEM, some platforms > > What's of_get_mac_address? This is a binding patch. Don't mix Linux things in > it. Ok, will improve it. > > MAC address that read from NVMEM efuse requires to swap bytes order, > > so add new property "nvmem_macaddr_swap" to specify the behavior. If > > the MAC address is valid from NVMEM, add new property > > "nvmem-mac-address" in ethernet node. > > > > Update these two properties in the binding documentation. > > > > Signed-off-by: Fugang Duan <fugang.duan@nxp.com> > > Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com> > > --- > > .../bindings/net/ethernet-controller.yaml | 14 ++++++++++++++ > > 1 file changed, 14 insertions(+) > > > > diff --git > > a/Documentation/devicetree/bindings/net/ethernet-controller.yaml > > b/Documentation/devicetree/bindings/net/ethernet-controller.yaml > > index e8f04687a3e0..c868c295aabf 100644 > > --- a/Documentation/devicetree/bindings/net/ethernet-controller.yaml > > +++ b/Documentation/devicetree/bindings/net/ethernet-controller.yaml > > @@ -32,6 +32,15 @@ properties: > > - minItems: 6 > > maxItems: 6 > > > > + nvmem-mac-address: > > + allOf: > > + - $ref: /schemas/types.yaml#definitions/uint8-array > > + - minItems: 6 > > + maxItems: 6 > > + description: > > + Specifies the MAC address that was read from nvmem-cells and > dynamically > > + add the property in device node; > > Why can't you use local-mac-address or mac-address? Those too can come > from some other source. I also don't understand what Andy's do for this, per his commit message "If the MAC address is valid from NVMEM, add new property "nvmem-mac-address" in ethernet node.". He said this done _DYNAMICALLY_, but I have not found where ""nvmem-mac-address" property been added, and can't find it from ethernet node. So I send out patch first to see if reviewers can give a hint, or point out this is actually incorrect. > > + > > max-frame-size: > > $ref: /schemas/types.yaml#/definitions/uint32 > > description: > > @@ -52,6 +61,11 @@ properties: > > nvmem-cell-names: > > const: mac-address > > > > + nvmem_macaddr_swap: > > + $ref: /schemas/types.yaml#/definitions/flag > > + description: > > + swap bytes order for the 6 bytes of MAC address > > So 'nvmem-mac-address' needs to be swapped or it's swapped before writing? > In any case, this belongs in the nvmem provider. MAC address read from NVMEM cell needs to be swapped. The order of bytes that NVMEM provider provided is fixed, so I think we should swap at the NVMEM consumer side. It is more reasonable and common add a property in Documentation/devicetree/bindings/nvmem/nvmem-consumer.yaml, and swap the data in nvmem_cell_read() function. Best Regards, Joakim Zhang > Rob
Hi Jabuk, > -----Original Message----- > From: Jakub Kicinski <kuba@kernel.org> > Sent: 2021年4月10日 2:44 > To: Joakim Zhang <qiangqing.zhang@nxp.com> > Cc: davem@davemloft.net; robh+dt@kernel.org; andrew@lunn.ch; > hkallweit1@gmail.com; linux@armlinux.org.uk; frowand.list@gmail.com; > netdev@vger.kernel.org; devicetree@vger.kernel.org; > linux-kernel@vger.kernel.org; dl-linux-imx <linux-imx@nxp.com> > Subject: Re: [PATCH net-next 0/3] net: add new properties for > of_get_mac_address from nvmem > > On Fri, 9 Apr 2021 17:07:08 +0800 Joakim Zhang wrote: > > This patch set adds new properties for of_get_mac_address from nvmem. > > Apart from addressing Rob's (and potentially other comments to come) please > also make sure to rebase before posting. This series doesn't seem to apply to > net-next. This patch set can be applied to latest net-next branch, the top commits as below, not sure where is the issue from, sorry. 5b489fea977c (origin/master, origin/HEAD) Merge branch 'ipa-next' 927c5043459e net: ipa: add IPA v4.11 configuration data fbb763e7e736 net: ipa: add IPA v4.5 configuration data Best Regards, Joakim Zhang
This patch set adds new properties for of_get_mac_address from nvmem. Fugang Duan (3): dt-bindings: net: add new properties for of_get_mac_address from nvmem net: ethernet: add property "nvmem_macaddr_swap" to swap macaddr bytes order of_net: add property "nvmem-mac-address" for of_get_mac_addr() .../bindings/net/ethernet-controller.yaml | 14 +++++++++++ drivers/of/of_net.c | 4 +++ net/ethernet/eth.c | 25 +++++++++++++++---- 3 files changed, 38 insertions(+), 5 deletions(-)