diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/813-v6.5-0011-nvmem-core-add-support-for-fixed-cells-layout.patch')
| -rw-r--r-- | target/linux/generic/backport-5.15/813-v6.5-0011-nvmem-core-add-support-for-fixed-cells-layout.patch | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/813-v6.5-0011-nvmem-core-add-support-for-fixed-cells-layout.patch b/target/linux/generic/backport-5.15/813-v6.5-0011-nvmem-core-add-support-for-fixed-cells-layout.patch new file mode 100644 index 0000000000..59b2f9fa2c --- /dev/null +++ b/target/linux/generic/backport-5.15/813-v6.5-0011-nvmem-core-add-support-for-fixed-cells-layout.patch @@ -0,0 +1,96 @@ +From 27f699e578b1a72df89dfa3bc42e093a01dc8d10 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Date: Sun, 11 Jun 2023 15:03:29 +0100 +Subject: [PATCH] nvmem: core: add support for fixed cells *layout* +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This adds support for the "fixed-layout" NVMEM layout binding. It allows +defining NVMEM cells in a layout DT node named "nvmem-layout". + +While NVMEM subsystem supports layout drivers it has been discussed that +"fixed-layout" may actually be supperted internally. It's because: +1. It's a very basic layout +2. It allows sharing code with legacy syntax parsing +3. It's safer for soc_device_match() due to -EPROBE_DEFER +4. This will make the syntax transition easier + +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +Reviewed-by: Michael Walle <michael@walle.cc> +Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> +Message-ID: <20230611140330.154222-26-srinivas.kandagatla@linaro.org> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + drivers/nvmem/core.c | 32 +++++++++++++++++++++++++++++--- + 1 file changed, 29 insertions(+), 3 deletions(-) + +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -696,7 +696,7 @@ static int nvmem_validate_keepouts(struc + return 0; + } + +-static int nvmem_add_cells_from_of(struct nvmem_device *nvmem) ++static int nvmem_add_cells_from_dt(struct nvmem_device *nvmem, struct device_node *np) + { + struct nvmem_layout *layout = nvmem->layout; + struct device *dev = &nvmem->dev; +@@ -704,7 +704,7 @@ static int nvmem_add_cells_from_of(struc + const __be32 *addr; + int len, ret; + +- for_each_child_of_node(dev->of_node, child) { ++ for_each_child_of_node(np, child) { + struct nvmem_cell_info info = {0}; + + addr = of_get_property(child, "reg", &len); +@@ -742,6 +742,28 @@ static int nvmem_add_cells_from_of(struc + return 0; + } + ++static int nvmem_add_cells_from_legacy_of(struct nvmem_device *nvmem) ++{ ++ return nvmem_add_cells_from_dt(nvmem, nvmem->dev.of_node); ++} ++ ++static int nvmem_add_cells_from_fixed_layout(struct nvmem_device *nvmem) ++{ ++ struct device_node *layout_np; ++ int err = 0; ++ ++ layout_np = of_nvmem_layout_get_container(nvmem); ++ if (!layout_np) ++ return 0; ++ ++ if (of_device_is_compatible(layout_np, "fixed-layout")) ++ err = nvmem_add_cells_from_dt(nvmem, layout_np); ++ ++ of_node_put(layout_np); ++ ++ return err; ++} ++ + int __nvmem_layout_register(struct nvmem_layout *layout, struct module *owner) + { + layout->owner = owner; +@@ -972,7 +994,7 @@ struct nvmem_device *nvmem_register(cons + if (rval) + goto err_remove_cells; + +- rval = nvmem_add_cells_from_of(nvmem); ++ rval = nvmem_add_cells_from_legacy_of(nvmem); + if (rval) + goto err_remove_cells; + +@@ -982,6 +1004,10 @@ struct nvmem_device *nvmem_register(cons + if (rval) + goto err_remove_cells; + ++ rval = nvmem_add_cells_from_fixed_layout(nvmem); ++ if (rval) ++ goto err_remove_cells; ++ + rval = nvmem_add_cells_from_layout(nvmem); + if (rval) + goto err_remove_cells; |