60 lines
2.1 KiB
Diff
60 lines
2.1 KiB
Diff
From de12c9691501ccba41a154c223869f82be4c12fd Mon Sep 17 00:00:00 2001
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From: Michael Walle <michael@walle.cc>
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Date: Tue, 4 Apr 2023 18:21:25 +0100
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Subject: [PATCH] nvmem: core: allow to modify a cell before adding it
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Provide a way to modify a cell before it will get added. This is useful
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to attach a custom post processing hook via a layout.
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Signed-off-by: Michael Walle <michael@walle.cc>
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Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
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Link: https://lore.kernel.org/r/20230404172148.82422-18-srinivas.kandagatla@linaro.org
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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drivers/nvmem/core.c | 4 ++++
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include/linux/nvmem-provider.h | 5 +++++
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2 files changed, 9 insertions(+)
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--- a/drivers/nvmem/core.c
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+++ b/drivers/nvmem/core.c
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@@ -695,6 +695,7 @@ static int nvmem_validate_keepouts(struc
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static int nvmem_add_cells_from_of(struct nvmem_device *nvmem)
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{
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+ struct nvmem_layout *layout = nvmem->layout;
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struct device *dev = &nvmem->dev;
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struct device_node *child;
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const __be32 *addr;
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@@ -724,6 +725,9 @@ static int nvmem_add_cells_from_of(struc
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info.np = of_node_get(child);
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+ if (layout && layout->fixup_cell_info)
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+ layout->fixup_cell_info(nvmem, layout, &info);
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+
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ret = nvmem_add_one_cell(nvmem, &info);
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kfree(info.name);
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if (ret) {
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--- a/include/linux/nvmem-provider.h
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+++ b/include/linux/nvmem-provider.h
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@@ -155,6 +155,8 @@ struct nvmem_cell_table {
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* @add_cells: Will be called if a nvmem device is found which
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* has this layout. The function will add layout
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* specific cells with nvmem_add_one_cell().
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+ * @fixup_cell_info: Will be called before a cell is added. Can be
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+ * used to modify the nvmem_cell_info.
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* @owner: Pointer to struct module.
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* @node: List node.
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*
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@@ -168,6 +170,9 @@ struct nvmem_layout {
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const struct of_device_id *of_match_table;
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int (*add_cells)(struct device *dev, struct nvmem_device *nvmem,
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struct nvmem_layout *layout);
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+ void (*fixup_cell_info)(struct nvmem_device *nvmem,
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+ struct nvmem_layout *layout,
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+ struct nvmem_cell_info *cell);
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/* private */
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struct module *owner;
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