Add interface for sysinfo to access a data area from the platform. This is useful to save/read a memory region of platform-specific data.
Signed-off-by: Raymond Mao raymond.mao@linaro.org --- drivers/sysinfo/sysinfo-uclass.c | 20 ++++++++++++++++++++ include/sysinfo.h | 30 ++++++++++++++++++++++++++++++ 2 files changed, 50 insertions(+)
diff --git a/drivers/sysinfo/sysinfo-uclass.c b/drivers/sysinfo/sysinfo-uclass.c index d77d1e3ee44..04a7748834a 100644 --- a/drivers/sysinfo/sysinfo-uclass.c +++ b/drivers/sysinfo/sysinfo-uclass.c @@ -99,6 +99,26 @@ int sysinfo_get_str(struct udevice *dev, int id, size_t size, char *val) return ops->get_str(dev, id, size, val); }
+int sysinfo_get_data(struct udevice *dev, int id, uchar **data, size_t *size) +{ + struct sysinfo_priv *priv; + struct sysinfo_ops *ops; + + if (!dev) + return -ENOSYS; + + priv = dev_get_uclass_priv(dev); + ops = sysinfo_get_ops(dev); + + if (!priv->detected) + return -EPERM; + + if (!ops->get_data) + return -ENOSYS; + + return ops->get_data(dev, id, data, size); +} + UCLASS_DRIVER(sysinfo) = { .id = UCLASS_SYSINFO, .name = "sysinfo", diff --git a/include/sysinfo.h b/include/sysinfo.h index 8a77ef44856..17b2b9c7111 100644 --- a/include/sysinfo.h +++ b/include/sysinfo.h @@ -115,6 +115,18 @@ struct sysinfo_ops { */ int (*get_str)(struct udevice *dev, int id, size_t size, char *val);
+ /** + * get_data() - Read a specific string data value that describes the + * hardware setup. + * @dev: The sysinfo instance to gather the data. + * @id: A unique identifier for the data area to be get. + * @data: Pointer to the address of the data area. + * @size: Pointer to the size of the data area. + * + * Return: 0 if OK, -ve on error. + */ + int (*get_data)(struct udevice *dev, int id, uchar **data, size_t *size); + /** * get_fit_loadable - Get the name of an image to load from FIT * This function can be used to provide the image names based on runtime @@ -186,6 +198,18 @@ int sysinfo_get_int(struct udevice *dev, int id, int *val); */ int sysinfo_get_str(struct udevice *dev, int id, size_t size, char *val);
+/** + * sysinfo_get_data() - Get a data area from the platform. + * @dev: The sysinfo instance to gather the data. + * @id: A unique identifier for the data area to be get. + * @data: Pointer to the address of the data area. + * @size: Pointer to the size of the data area. + * + * Return: 0 if OK, -EPERM if called before sysinfo_detect(), else -ve on + * error. + */ +int sysinfo_get_data(struct udevice *dev, int id, uchar **data, size_t *size); + /** * sysinfo_get() - Return the sysinfo device for the sysinfo in question. * @devp: Pointer to structure to receive the sysinfo device. @@ -241,6 +265,12 @@ static inline int sysinfo_get_str(struct udevice *dev, int id, size_t size, return -ENOSYS; }
+static inline int sysinfo_get_data(struct udevice *dev, int id, uchar **data, + size_t *size) +{ + return -ENOSYS; +} + static inline int sysinfo_get(struct udevice **devp) { return -ENOSYS;