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Update aximemorymap Driver for Compatibility with Kernel 6.4 and Above #141

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merged 2 commits into from
Jun 3, 2024
Merged

Update aximemorymap Driver for Compatibility with Kernel 6.4 and Above #141

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724e0af
Updated compatibility for Linux kernel version 6.4.0 and above
ruck314 Jun 3, 2024
89be143
remove file
ruck314 Jun 3, 2024
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9 changes: 8 additions & 1 deletion petalinux/aximemorymap/files/aximemorymap.c
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Original file line number Diff line number Diff line change
Expand Up @@ -34,7 +34,6 @@
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/slab.h>
#include <linux/version.h>

/**
* MODULE_NAME - "axi_memory_map"
Expand Down Expand Up @@ -112,7 +111,11 @@ struct file_operations MapFunctions = {
* Note: The permissions set by this callback can be overridden by udev rules on
* systems where udev is responsible for device node creation and management.
*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 4, 0)
char *Map_DevNode(struct device *dev, umode_t *mode) {
#else
char *Map_DevNode(const struct device *dev, umode_t *mode) {
#endif
if (mode != NULL) *mode = 0666; // Set default permissions to read and write for user, group, and others
return NULL; // Return NULL as no specific device node name alteration is required
}
Expand Down Expand Up @@ -157,7 +160,11 @@ int Map_Init(void) {

// Step 4: Create a device class
pr_info("%s: Init: Creating device class\n", MOD_NAME);
#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 4, 0)
gCl = class_create(THIS_MODULE, dev.devName);
#else
gCl = class_create(dev.devName);
#endif
if (IS_ERR(gCl)) {
pr_err("%s: Init: Failed to create device class\n", MOD_NAME);
unregister_chrdev_region(dev.devNum, 1); // Clean up allocated resources
Expand Down
5 changes: 5 additions & 0 deletions petalinux/aximemorymap/files/aximemorymap.h
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,7 @@
#include <linux/cdev.h>
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/version.h>
#include <DmaDriver.h>

// Defines the size of the map, set to 64K.
Expand Down Expand Up @@ -71,7 +72,11 @@ struct MapDevice {
};

// Function prototypes for device operations.
#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 4, 0)
char *Map_DevNode(struct device *dev, umode_t *mode);
#else
char *Map_DevNode(const struct device *dev, umode_t *mode);
#endif
int Map_Init(void);
void Map_Exit(void);
int Map_Open(struct inode *inode, struct file *filp);
Expand Down