powerpc/via-pmu: Convert to proc_fops/seq_file

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 91 insertions, 69 deletions

diff --git a/drivers/macintosh/via-pmu.c b/drivers/macintosh/via-pmu.c
index 6f308a4757ee..db379c381432 100644
--- a/drivers/macintosh/via-pmu.c
+++ b/drivers/macintosh/via-pmu.c
@@ -36,6 +36,7 @@
 #include <linux/spinlock.h>
 #include <linux/pm.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/device.h>
@@ -186,17 +187,11 @@ static int init_pmu(void);
 static void pmu_start(void);
 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
 static irqreturn_t gpio1_interrupt(int irq, void *arg);
-static int proc_get_info(char *page, char **start, off_t off,
-                          int count, int *eof, void *data);
-static int proc_get_irqstats(char *page, char **start, off_t off,
-                          int count, int *eof, void *data);
+static const struct file_operations pmu_info_proc_fops;
+static const struct file_operations pmu_irqstats_proc_fops;
 static void pmu_pass_intr(unsigned char *data, int len);
-static int proc_get_batt(char *page, char **start, off_t off,
-                        int count, int *eof, void *data);
-static int proc_read_options(char *page, char **start, off_t off,
-                        int count, int *eof, void *data);
-static int proc_write_options(struct file *file, const char __user *buffer,
-                        unsigned long count, void *data);
+static const struct file_operations pmu_battery_proc_fops;
+static const struct file_operations pmu_options_proc_fops;
 
 #ifdef CONFIG_ADB
 struct adb_driver via_pmu_driver = {
@@ -507,19 +502,15 @@ static int __init via_pmu_dev_init(void)
                 for (i=0; i<pmu_battery_count; i++) {
                         char title[16];
                         sprintf(title, "battery_%ld", i);
-                        proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
-                                                proc_get_batt, (void *)i);
+                        proc_pmu_batt[i] = proc_create_data(title, 0, proc_pmu_root,
+                                        &pmu_battery_proc_fops, (void *)i);
                 }
 
-                proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
-                                        proc_get_info, NULL);
-                proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
-                                        proc_get_irqstats, NULL);
-                proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
-                if (proc_pmu_options) {
-                        proc_pmu_options->read_proc = proc_read_options;
-                        proc_pmu_options->write_proc = proc_write_options;
-                }
+                proc_pmu_info = proc_create("info", 0, proc_pmu_root, &pmu_info_proc_fops);
+                proc_pmu_irqstats = proc_create("interrupts", 0, proc_pmu_root,
+                                                &pmu_irqstats_proc_fops);
+                proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
+                                                &pmu_options_proc_fops);
         }
         return 0;
 }
@@ -799,27 +790,33 @@ query_battery_state(void)
                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 }
 
-static int
-proc_get_info(char *page, char **start, off_t off,
-                int count, int *eof, void *data)
+static int pmu_info_proc_show(struct seq_file *m, void *v)
 {
-        char* p = page;
-
-        p += sprintf(p, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
-        p += sprintf(p, "PMU firmware version   : %02x\n", pmu_version);
-        p += sprintf(p, "AC Power               : %d\n",
+        seq_printf(m, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
+        seq_printf(m, "PMU firmware version   : %02x\n", pmu_version);
+        seq_printf(m, "AC Power               : %d\n",
                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
-        p += sprintf(p, "Battery count          : %d\n", pmu_battery_count);
+        seq_printf(m, "Battery count          : %d\n", pmu_battery_count);
+
+        return 0;
+}
 
-        return p - page;
+static int pmu_info_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, pmu_info_proc_show, NULL);
 }
 
-static int
-proc_get_irqstats(char *page, char **start, off_t off,
-                  int count, int *eof, void *data)
+static const struct file_operations pmu_info_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = pmu_info_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
 {
         int i;
-        char* p = page;
         static const char *irq_names[] = {
                 "Total CB1 triggered events",
                 "Total GPIO1 triggered events",
@@ -835,60 +832,76 @@ proc_get_irqstats(char *page, char **start, off_t off,
         };
 
         for (i=0; i<11; i++) {
-                p += sprintf(p, " %2u: %10u (%s)\n",
+                seq_printf(m, " %2u: %10u (%s)\n",
                              i, pmu_irq_stats[i], irq_names[i]);
         }
-        return p - page;
+        return 0;
 }
 
-static int
-proc_get_batt(char *page, char **start, off_t off,
-                int count, int *eof, void *data)
+static int pmu_irqstats_proc_open(struct inode *inode, struct file *file)
 {
-        long batnum = (long)data;
-        char *p = page;
+        return single_open(file, pmu_irqstats_proc_show, NULL);
+}
+
+static const struct file_operations pmu_irqstats_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = pmu_irqstats_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static int pmu_battery_proc_show(struct seq_file *m, void *v)
+{
+        long batnum = (long)m->private;
         
-        p += sprintf(p, "\n");
-        p += sprintf(p, "flags      : %08x\n",
-                pmu_batteries[batnum].flags);
-        p += sprintf(p, "charge     : %d\n",
-                pmu_batteries[batnum].charge);
-        p += sprintf(p, "max_charge : %d\n",
-                pmu_batteries[batnum].max_charge);
-        p += sprintf(p, "current    : %d\n",
-                pmu_batteries[batnum].amperage);
-        p += sprintf(p, "voltage    : %d\n",
-                pmu_batteries[batnum].voltage);
-        p += sprintf(p, "time rem.  : %d\n",
-                pmu_batteries[batnum].time_remaining);
-
-        return p - page;
+        seq_putc(m, '\n');
+        seq_printf(m, "flags      : %08x\n", pmu_batteries[batnum].flags);
+        seq_printf(m, "charge     : %d\n", pmu_batteries[batnum].charge);
+        seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
+        seq_printf(m, "current    : %d\n", pmu_batteries[batnum].amperage);
+        seq_printf(m, "voltage    : %d\n", pmu_batteries[batnum].voltage);
+        seq_printf(m, "time rem.  : %d\n", pmu_batteries[batnum].time_remaining);
+        return 0;
 }
 
-static int
-proc_read_options(char *page, char **start, off_t off,
-                        int count, int *eof, void *data)
+static int pmu_battery_proc_open(struct inode *inode, struct file *file)
 {
-        char *p = page;
+        return single_open(file, pmu_battery_proc_show, PDE(inode)->data);
+}
 
+static const struct file_operations pmu_battery_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = pmu_battery_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static int pmu_options_proc_show(struct seq_file *m, void *v)
+{
 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
         if (pmu_kind == PMU_KEYLARGO_BASED &&
             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
-                p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
+                seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
 #endif
         if (pmu_kind == PMU_KEYLARGO_BASED)
-                p += sprintf(p, "server_mode=%d\n", option_server_mode);
+                seq_printf(m, "server_mode=%d\n", option_server_mode);
 
-        return p - page;
+        return 0;
 }
-                        
-static int
-proc_write_options(struct file *file, const char __user *buffer,
-                        unsigned long count, void *data)
+
+static int pmu_options_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, pmu_options_proc_show, NULL);
+}
+
+static ssize_t pmu_options_proc_write(struct file *file,
+                const char __user *buffer, size_t count, loff_t *pos)
 {
         char tmp[33];
         char *label, *val;
-        unsigned long fcount = count;
+        size_t fcount = count;
         
         if (!count)
                 return -EINVAL;
@@ -927,6 +940,15 @@ proc_write_options(struct file *file, const char __user *buffer,
         return fcount;
 }
 
+static const struct file_operations pmu_options_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = pmu_options_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .write          = pmu_options_proc_write,
+};
+
 #ifdef CONFIG_ADB
 /* Send an ADB command */
 static int pmu_send_request(struct adb_request *req, int sync)