@@ -78,7 +78,7 @@ The following uses **rtc_hi35xx.c** as an example to present the information req
Generally, the HDF calls the **Bind** function and then the **Init** function to load a driver. If **Init** fails to be called, the HDF calls **Release** to release driver resources and exit.
RTC driver entry example:
```
struct HdfDriverEntry g_rtcDriverEntry = {
.moduleVersion = 1,
...
...
@@ -98,7 +98,7 @@ The following uses **rtc_hi35xx.c** as an example to present the information req
-**device_info.hcs** configuration example
```
root {
device_info {
...
...
@@ -120,7 +120,7 @@ The following uses **rtc_hi35xx.c** as an example to present the information req
-**rtc_config.hcs** configuration example
```
root {
platform {
...
...
@@ -139,16 +139,16 @@ The following uses **rtc_hi35xx.c** as an example to present the information req
lock3Addr = 0xff;
}
}
}
}
```
}
```
3. Initialize the **RtcHost** object at the core layer, including defining a custom structure (to pass parameters and data) and implementing the **HdfDriverEntry** member functions (**Bind**, **Init** and **Release**) to instantiate **RtcMethod** in **RtcHost** (so that the underlying driver functions can be called).
- Defining a custom structure
To the driver, the custom structure holds parameters and data. The **DeviceResourceIface** method provided by the HDF reads the values in the **rtc_config.hcs** file to initialize the members in the custom structure.
```
struct RtcConfigInfo {
uint32_t spiBaseAddr; // Used for address mapping.
...
...
@@ -174,7 +174,7 @@ The following uses **rtc_hi35xx.c** as an example to present the information req
```
- Instantiating **RtcMethod** in **RtcHost** (other members are initialized by **Init**)
```
// Example in rtc_hi35xx.c: instantiate the hook.
static struct RtcMethod g_method = {
...
...
@@ -217,7 +217,7 @@ The following uses **rtc_hi35xx.c** as an example to present the information req
Binds the **HdfDeviceObject** object and **RtcHost**.
host = RtcHostFromDevice(device);// A forced conversion from HdfDeviceObject to RtcHost is involved.
host = RtcHostFromDevice(device);// Forcibly convert HdfDeviceObject to RtcHost.
rtcInfo = OsalMemCalloc(sizeof(*rtcInfo));
...
// HiRtcConfigData reads attributes from the device configuration tree and fills the values in supportAnaCtrl, supportLock, spiBaseAddr, regAddrLength, and irq in rtcInfo.
// Provide parameters for HiRtcSwInit and HiRtcSwInit, and perform operations such as releasing memory when the function internal processing fails.
// Provide parameters for HiRtcSwInit and HiRtcSwInit. When HiRtcSwInit and HiRtcSwInit fail to be executed internally, Release() can be called to release memory.
if (HiRtcConfigData(rtcInfo, device->property) != 0) {
...
}
...
...
@@ -287,15 +287,15 @@ The following uses **rtc_hi35xx.c** as an example to present the information req
Releases the memory and deletes the controller. This function assigns values to the **Release** function in the driver entry structure. If the HDF fails to call the **Init** function to initialize the driver, the **Release** function can be called to release driver resources. All forced conversion operations for obtaining the corresponding object can be successful only when the **Init** or **Bind** function has the corresponding value assignment operations.
