[POWERPC] Sky Cpu and Nexus: use seq_file/single_open on proc interface
This patch changes proc interface to be used with single_file/seq_open
calls.
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/drivers/misc/hdpuftrs/hdpu_cpustate.c b/drivers/misc/hdpuftrs/hdpu_cpustate.c
index 32f65a3..aa8ce7a 100644
--- a/drivers/misc/hdpuftrs/hdpu_cpustate.c
+++ b/drivers/misc/hdpuftrs/hdpu_cpustate.c
@@ -19,9 +19,10 @@
#include <linux/spinlock.h>
#include <linux/miscdevice.h>
#include <linux/proc_fs.h>
+#include <linux/hdpu_features.h>
#include <linux/platform_device.h>
#include <asm/uaccess.h>
-#include <linux/hdpu_features.h>
+#include <linux/seq_file.h>
#include <asm/io.h>
#define SKY_CPUSTATE_VERSION "1.1"
@@ -29,7 +30,30 @@
static int hdpu_cpustate_probe(struct platform_device *pdev);
static int hdpu_cpustate_remove(struct platform_device *pdev);
-struct cpustate_t cpustate;
+static unsigned char cpustate_get_state(void);
+static int cpustate_proc_open(struct inode *inode, struct file *file);
+static int cpustate_proc_read(struct seq_file *seq, void *offset);
+
+static struct cpustate_t cpustate;
+
+static const struct file_operations proc_cpustate = {
+ .open = cpustate_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .owner = THIS_MODULE,
+};
+
+static int cpustate_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, cpustate_proc_read, NULL);
+}
+
+static int cpustate_proc_read(struct seq_file *seq, void *offset)
+{
+ seq_printf(seq, "CPU State: %04x\n", cpustate_get_state());
+ return 0;
+}
static int cpustate_get_ref(int excl)
{
@@ -67,13 +91,13 @@
return 0;
}
-unsigned char cpustate_get_state(void)
+static unsigned char cpustate_get_state(void)
{
return cpustate.cached_val;
}
-void cpustate_set_state(unsigned char new_state)
+static void cpustate_set_state(unsigned char new_state)
{
unsigned int state = (new_state << 21);
@@ -135,29 +159,6 @@
return cpustate_free_ref();
}
-/*
- * Info exported via "/proc/sky_cpustate".
- */
-static int cpustate_read_proc(char *page, char **start, off_t off,
- int count, int *eof, void *data)
-{
- char *p = page;
- int len = 0;
-
- p += sprintf(p, "CPU State: %04x\n", cpustate_get_state());
- len = p - page;
-
- if (len <= off + count)
- *eof = 1;
- *start = page + off;
- len -= off;
- if (len > count)
- len = count;
- if (len < 0)
- len = 0;
- return len;
-}
-
static struct platform_driver hdpu_cpustate_driver = {
.probe = hdpu_cpustate_probe,
.remove = hdpu_cpustate_remove,
@@ -208,11 +209,14 @@
return ret;
}
- proc_de = create_proc_read_entry("sky_cpustate", 0, 0,
- cpustate_read_proc, NULL);
- if (proc_de == NULL)
+ proc_de = create_proc_entry("sky_cpustate", 0666, &proc_root);
+ if (!proc_de) {
printk(KERN_WARNING "sky_cpustate: "
- "Unable to create proc dir entry\n");
+ "Unable to create proc entry\n");
+ } else {
+ proc_de->proc_fops = &proc_cpustate;
+ proc_de->owner = THIS_MODULE;
+ }
printk(KERN_INFO "Sky CPU State Driver v" SKY_CPUSTATE_VERSION "\n");
return 0;