When doing development around nvmem devices, it can be useful to list
which ones exist. Add a command to facilitate this. It can be extended
in future as the need arises (e.g.export cells into the environment?).
Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
---
commands/Kconfig | 7 +++++++
commands/Makefile | 1 +
commands/nvmem.c | 24 ++++++++++++++++++++++++
drivers/nvmem/core.c | 9 +++++++++
include/linux/nvmem-consumer.h | 2 ++
5 files changed, 43 insertions(+)
create mode 100644 commands/nvmem.c
diff --git a/commands/Kconfig b/commands/Kconfig
index 5ae3cb3dd145..7bb36d6e417e 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -206,6 +206,13 @@ config CMD_REGULATOR
the regulator command lists the currently registered regulators and
their current state.
+config CMD_NVMEM
+ bool
+ depends on NVMEM
+ prompt "nvmem command"
+ help
+ the nvmem command lists the currently registered nvmem devices.
+
config CMD_LSPCI
bool
depends on PCI
diff --git a/commands/Makefile b/commands/Makefile
index 4b45d266fd56..ba5ea19eb202 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -47,6 +47,7 @@ obj-$(CONFIG_CMD_SAVEENV) += saveenv.o
obj-$(CONFIG_CMD_LOADENV) += loadenv.o
obj-$(CONFIG_CMD_NAND) += nand.o
obj-$(CONFIG_CMD_NANDTEST) += nandtest.o
+obj-$(CONFIG_CMD_NVMEM) += nvmem.o
obj-$(CONFIG_CMD_MEMTEST) += memtest.o
obj-$(CONFIG_CMD_MEMTESTER) += memtester/
obj-$(CONFIG_CMD_TRUE) += true.o
diff --git a/commands/nvmem.c b/commands/nvmem.c
new file mode 100644
index 000000000000..a0e3d092e3cf
--- /dev/null
+++ b/commands/nvmem.c
@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: GPL-2.0
+// SPDX-FileCopyrightText: © 2021 Ahmad Fatoum, Pengutronix
+
+#include <common.h>
+#include <command.h>
+#include <linux/nvmem-consumer.h>
+
+static int do_nvmem(int argc, char *argv[])
+{
+ nvmem_devices_print();
+
+ return 0;
+}
+
+BAREBOX_CMD_HELP_START(nvmem)
+BAREBOX_CMD_HELP_TEXT("Usage: nvmem")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(nvmem)
+ .cmd = do_nvmem,
+ BAREBOX_CMD_DESC("list nvmem devices")
+ BAREBOX_CMD_GROUP(CMD_GRP_HWMANIP)
+ BAREBOX_CMD_HELP(cmd_nvmem_help)
+BAREBOX_CMD_END
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index c060e627db4f..ae9c965c25e2 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -49,6 +49,15 @@ struct nvmem_cell {
static LIST_HEAD(nvmem_cells);
static LIST_HEAD(nvmem_devs);
+void nvmem_devices_print(void)
+{
+ struct nvmem_device *dev;
+
+ list_for_each_entry(dev, &nvmem_devs, node) {
+ printf("%s\n", dev_name(&dev->dev));
+ }
+}
+
static ssize_t nvmem_cdev_read(struct cdev *cdev, void *buf, size_t count,
loff_t offset, unsigned long flags)
{
diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h
index 5f44cf00cdff..b979f23372a6 100644
--- a/include/linux/nvmem-consumer.h
+++ b/include/linux/nvmem-consumer.h
@@ -49,6 +49,8 @@ ssize_t nvmem_device_cell_read(struct nvmem_device *nvmem,
int nvmem_device_cell_write(struct nvmem_device *nvmem,
struct nvmem_cell_info *info, void *buf);
+void nvmem_devices_print(void);
+
#else
static inline struct nvmem_cell *nvmem_cell_get(struct device_d *dev,
--
2.29.2
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