From: Michael Walle <michael@walle.cc> To: Jonathan Corbet <corbet@lwn.net>, Srinivas Kandagatla <srinivas.kandagatla@linaro.org>, Miquel Raynal <miquel.raynal@bootlin.com>, Rob Herring <robh+dt@kernel.org>, Frank Rowand <frowand.list@gmail.com>, Sascha Hauer <s.hauer@pengutronix.de> Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, Michael Walle <michael@walle.cc> Subject: [PATCH v4 00/20] nvmem: core: introduce NVMEM layouts Date: Wed, 23 Nov 2022 19:01:31 +0100 [thread overview] Message-ID: <20221123180151.2160033-1-michael@walle.cc> (raw) This is now the third attempt to fetch the MAC addresses from the VPD for the Kontron sl28 boards. Previous discussions can be found here: https://lore.kernel.org/lkml/20211228142549.1275412-1-michael@walle.cc/ NVMEM cells are typically added by board code or by the devicetree. But as the cells get more complex, there is (valid) push back from the devicetree maintainers to not put that handling in the devicetree. Therefore, introduce NVMEM layouts. They operate on the NVMEM device and can add cells during runtime. That way it is possible to add more complex cells than it is possible right now with the offset/length/bits description in the device tree. For example, you can have post processing for individual cells (think of endian swapping, or ethernet offset handling). The imx-ocotp driver is the only user of the global post processing hook, convert it to nvmem layouts and drop the global post pocessing hook. For now, the layouts are selected by the device tree. But the idea is that also board files or other drivers could set a layout. Although no code for that exists yet. Thanks to Miquel, the device tree bindings are already approved and merged. NVMEM layouts as modules? While possible in principle, it doesn't make any sense because the NVMEM core can't be compiled as a module. The layouts needs to be available at probe time. (That is also the reason why they get registered with subsys_initcall().) So if the NVMEM core would be a module, the layouts could be modules, too. Michael Walle (18): net: add helper eth_addr_add() of: base: add of_parse_phandle_with_optional_args() of: property: make #.*-cells optional for simple props of: property: add #nvmem-cell-cells property nvmem: core: fix device node refcounting nvmem: core: add an index parameter to the cell nvmem: core: move struct nvmem_cell_info to nvmem-provider.h nvmem: core: drop the removal of the cells in nvmem_add_cells() nvmem: core: add nvmem_add_one_cell() nvmem: core: use nvmem_add_one_cell() in nvmem_add_cells_from_of() nvmem: core: introduce NVMEM layouts nvmem: core: add per-cell post processing nvmem: core: allow to modify a cell before adding it nvmem: imx-ocotp: replace global post processing with layouts nvmem: cell: drop global cell_post_process nvmem: core: provide own priv pointer in post process callback nvmem: layouts: add sl28vpd layout MAINTAINERS: add myself as sl28vpd nvmem layout driver Miquel Raynal (2): nvmem: layouts: Add ONIE tlv layout driver MAINTAINERS: Add myself as ONIE tlv NVMEM layout maintainer Documentation/driver-api/nvmem.rst | 15 ++ MAINTAINERS | 12 ++ drivers/nvmem/Kconfig | 4 + drivers/nvmem/Makefile | 1 + drivers/nvmem/core.c | 285 ++++++++++++++++++++++------- drivers/nvmem/imx-ocotp.c | 34 ++-- drivers/nvmem/layouts/Kconfig | 23 +++ drivers/nvmem/layouts/Makefile | 7 + drivers/nvmem/layouts/onie-tlv.c | 244 ++++++++++++++++++++++++ drivers/nvmem/layouts/sl28vpd.c | 153 ++++++++++++++++ drivers/of/property.c | 6 +- include/linux/etherdevice.h | 14 ++ include/linux/nvmem-consumer.h | 17 +- include/linux/nvmem-provider.h | 95 +++++++++- include/linux/of.h | 25 +++ 15 files changed, 836 insertions(+), 99 deletions(-) create mode 100644 drivers/nvmem/layouts/Kconfig create mode 100644 drivers/nvmem/layouts/Makefile create mode 100644 drivers/nvmem/layouts/onie-tlv.c create mode 100644 drivers/nvmem/layouts/sl28vpd.c -- 2.30.2
WARNING: multiple messages have this Message-ID (diff)
From: Michael Walle <michael@walle.cc> To: Jonathan Corbet <corbet@lwn.net>, Srinivas Kandagatla <srinivas.kandagatla@linaro.org>, Miquel Raynal <miquel.raynal@bootlin.com>, Rob Herring <robh+dt@kernel.org>, Frank Rowand <frowand.list@gmail.com>, Sascha Hauer <s.hauer@pengutronix.de> Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, Michael Walle <michael@walle.cc> Subject: [PATCH v4 00/20] nvmem: core: introduce NVMEM layouts Date: Wed, 23 Nov 2022 19:01:31 +0100 [thread overview] Message-ID: <20221123180151.2160033-1-michael@walle.cc> (raw) This is now the third attempt to fetch the MAC addresses from the VPD for the Kontron sl28 boards. Previous discussions can be found here: https://lore.kernel.org/lkml/20211228142549.1275412-1-michael@walle.cc/ NVMEM cells are typically added by board code or by the devicetree. But as the cells get more complex, there is (valid) push back from the devicetree maintainers to not put that handling in the devicetree. Therefore, introduce NVMEM layouts. They operate on the NVMEM device and can add cells during runtime. That way it is possible to add more complex cells than it is possible right now with the offset/length/bits description in the device tree. For example, you can have post processing for individual cells (think of endian swapping, or ethernet offset handling). The imx-ocotp driver is the only user of the global post processing hook, convert it to nvmem layouts and drop the global post pocessing hook. For now, the layouts are selected by the device tree. But the idea is that also board files or other drivers could set a layout. Although no code for that exists yet. Thanks to Miquel, the device tree bindings are already approved and merged. NVMEM layouts as modules? While possible in principle, it doesn't make any sense because the NVMEM core can't be compiled as a module. The layouts needs to be available at probe time. (That is also the reason why they get registered with subsys_initcall().) So if the NVMEM core would be a module, the layouts could be modules, too. Michael Walle (18): net: add helper eth_addr_add() of: base: add of_parse_phandle_with_optional_args() of: property: make #.*-cells optional for simple props of: property: add #nvmem-cell-cells property nvmem: core: fix device node refcounting nvmem: core: add an index parameter to the cell nvmem: core: move struct nvmem_cell_info to nvmem-provider.h nvmem: core: drop the removal of the cells in nvmem_add_cells() nvmem: core: add nvmem_add_one_cell() nvmem: core: use nvmem_add_one_cell() in nvmem_add_cells_from_of() nvmem: core: introduce NVMEM layouts nvmem: core: add per-cell post processing nvmem: core: allow to modify a cell before adding it nvmem: imx-ocotp: replace global post processing with layouts nvmem: cell: drop global cell_post_process nvmem: core: provide own priv pointer in post process callback nvmem: layouts: add sl28vpd layout MAINTAINERS: add myself as sl28vpd nvmem layout driver Miquel Raynal (2): nvmem: layouts: Add ONIE tlv layout driver MAINTAINERS: Add myself as ONIE tlv NVMEM layout maintainer Documentation/driver-api/nvmem.rst | 15 ++ MAINTAINERS | 12 ++ drivers/nvmem/Kconfig | 4 + drivers/nvmem/Makefile | 1 + drivers/nvmem/core.c | 285 ++++++++++++++++++++++------- drivers/nvmem/imx-ocotp.c | 34 ++-- drivers/nvmem/layouts/Kconfig | 23 +++ drivers/nvmem/layouts/Makefile | 7 + drivers/nvmem/layouts/onie-tlv.c | 244 ++++++++++++++++++++++++ drivers/nvmem/layouts/sl28vpd.c | 153 ++++++++++++++++ drivers/of/property.c | 6 +- include/linux/etherdevice.h | 14 ++ include/linux/nvmem-consumer.h | 17 +- include/linux/nvmem-provider.h | 95 +++++++++- include/linux/of.h | 25 +++ 15 files changed, 836 insertions(+), 99 deletions(-) create mode 100644 drivers/nvmem/layouts/Kconfig create mode 100644 drivers/nvmem/layouts/Makefile create mode 100644 drivers/nvmem/layouts/onie-tlv.c create mode 100644 drivers/nvmem/layouts/sl28vpd.c -- 2.30.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2022-11-23 18:03 UTC|newest] Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-11-23 18:01 Michael Walle [this message] 2022-11-23 18:01 ` [PATCH v4 00/20] nvmem: core: introduce NVMEM layouts Michael Walle 2022-11-23 18:01 ` [PATCH v4 01/20] net: add helper eth_addr_add() Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-23 18:01 ` [PATCH v4 02/20] of: base: add of_parse_phandle_with_optional_args() Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-23 18:01 ` [PATCH v4 03/20] of: property: make #.*-cells optional for simple props Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-30 0:45 ` Rob Herring 2022-11-30 0:45 ` Rob Herring 2022-11-23 18:01 ` [PATCH v4 04/20] of: property: add #nvmem-cell-cells property Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-30 0:45 ` Rob Herring 2022-11-30 0:45 ` Rob Herring 2022-11-23 18:01 ` [PATCH v4 05/20] nvmem: core: fix device node refcounting Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-23 18:01 ` [PATCH v4 06/20] nvmem: core: add an index parameter to the cell Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-23 18:01 ` [PATCH v4 07/20] nvmem: core: move struct nvmem_cell_info to nvmem-provider.h Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-23 18:01 ` [PATCH v4 08/20] nvmem: core: drop the removal of the cells in nvmem_add_cells() Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-23 18:01 ` [PATCH v4 09/20] nvmem: core: add nvmem_add_one_cell() Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-23 18:01 ` [PATCH v4 10/20] nvmem: core: use nvmem_add_one_cell() in nvmem_add_cells_from_of() Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-23 18:01 ` [PATCH v4 11/20] nvmem: core: introduce NVMEM layouts Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-23 18:01 ` [PATCH v4 12/20] nvmem: core: add per-cell post processing Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-23 18:01 ` [PATCH v4 13/20] nvmem: core: allow to modify a cell before adding it Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-23 18:01 ` [PATCH v4 14/20] nvmem: imx-ocotp: replace global post processing with layouts Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-23 18:01 ` [PATCH v4 15/20] nvmem: cell: drop global cell_post_process Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-23 18:01 ` [PATCH v4 16/20] nvmem: core: provide own priv pointer in post process callback Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-23 18:01 ` [PATCH v4 17/20] nvmem: layouts: add sl28vpd layout Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-23 18:01 ` [PATCH v4 18/20] MAINTAINERS: add myself as sl28vpd nvmem layout driver Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-23 18:01 ` [PATCH v4 19/20] nvmem: layouts: Add ONIE tlv " Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-11-23 18:01 ` [PATCH v4 20/20] MAINTAINERS: Add myself as ONIE tlv NVMEM layout maintainer Michael Walle 2022-11-23 18:01 ` Michael Walle 2022-12-02 16:45 [PATCH v4 10/20] nvmem: core: use nvmem_add_one_cell() in nvmem_add_cells_from_of() kernel test robot 2022-12-03 8:30 ` Dan Carpenter 2022-12-03 8:30 ` Dan Carpenter 2022-12-05 8:45 ` Michael Walle 2022-12-05 8:45 ` Michael Walle
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