Messages in this thread Patch in this message | | | From | Miquel Raynal <> | Subject | [PATCH v8 4/8] nvmem: core: Track the registered devices | Date | Mon, 7 Aug 2023 10:24:15 +0200 |
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Create a list with all the NVMEM devices registered in the subsystem. This way we can iterate through them when needed (unused for now).
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> --- drivers/nvmem/core.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index 257328887263..4e81e0aaf433 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -23,6 +23,7 @@ struct nvmem_device { struct module *owner; struct device dev; + struct list_head node; int stride; int word_size; int id; @@ -76,6 +77,9 @@ static LIST_HEAD(nvmem_cell_tables); static DEFINE_MUTEX(nvmem_lookup_mutex); static LIST_HEAD(nvmem_lookup_list); +static DEFINE_MUTEX(nvmem_devices_mutex); +static LIST_HEAD(nvmem_devices_list); + static BLOCKING_NOTIFIER_HEAD(nvmem_notifier); static DEFINE_SPINLOCK(nvmem_layout_lock); @@ -1012,6 +1016,10 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config) if (rval) goto err_remove_cells; + mutex_lock(&nvmem_devices_mutex); + list_add_tail(&nvmem->node, &nvmem_devices_list); + mutex_unlock(&nvmem_devices_mutex); + blocking_notifier_call_chain(&nvmem_notifier, NVMEM_ADD, nvmem); return nvmem; @@ -1037,6 +1045,10 @@ static void nvmem_device_release(struct kref *kref) blocking_notifier_call_chain(&nvmem_notifier, NVMEM_REMOVE, nvmem); + mutex_lock(&nvmem_devices_mutex); + list_del(&nvmem->node); + mutex_unlock(&nvmem_devices_mutex); + if (nvmem->flags & FLAG_COMPAT) device_remove_bin_file(nvmem->base_dev, &nvmem->eeprom); -- 2.34.1
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