asus_acpi: convert to seq_file

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Corentin Chary <corentincj@iksaif.net>
Cc: Karol Kozimor <sziwan@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 194 insertions, 127 deletions

diff --git a/drivers/platform/x86/asus_acpi.c b/drivers/platform/x86/asus_acpi.c
index 0c9c53111a22..c1d2aeeea948 100644
--- a/drivers/platform/x86/asus_acpi.c
+++ b/drivers/platform/x86/asus_acpi.c
@@ -35,6 +35,7 @@
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/backlight.h>
 #include <acpi/acpi_drivers.h>
 #include <acpi/acpi_bus.h>
@@ -513,26 +514,12 @@ static int read_acpi_int(acpi_handle handle, const char *method, int *val)
         return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
 }
 
-/*
- * We write our info in page, we begin at offset off and cannot write more
- * than count bytes. We set eof to 1 if we handle those 2 values. We return the
- * number of bytes written in page
- */
-static int
-proc_read_info(char *page, char **start, off_t off, int count, int *eof,
-               void *data)
+static int asus_info_proc_show(struct seq_file *m, void *v)
 {
-        int len = 0;
         int temp;
-        char buf[16];           /* enough for all info */
-        /*
-         * We use the easy way, we don't care of off and count,
-         * so we don't set eof to 1
-         */
 
-        len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
-        len += sprintf(page + len, "Model reference    : %s\n",
-                       hotk->methods->name);
+        seq_printf(m, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
+        seq_printf(m, "Model reference    : %s\n", hotk->methods->name);
         /*
          * The SFUN method probably allows the original driver to get the list
          * of features supported by a given model. For now, 0x0100 or 0x0800
@@ -540,8 +527,7 @@ proc_read_info(char *page, char **start, off_t off, int count, int *eof,
          * The significance of others is yet to be found.
          */
         if (read_acpi_int(hotk->handle, "SFUN", &temp))
-                len +=
-                    sprintf(page + len, "SFUN value         : 0x%04x\n", temp);
+                seq_printf(m, "SFUN value         : 0x%04x\n", temp);
         /*
          * Another value for userspace: the ASYM method returns 0x02 for
          * battery low and 0x04 for battery critical, its readings tend to be
@@ -550,30 +536,34 @@ proc_read_info(char *page, char **start, off_t off, int count, int *eof,
          * silently ignored.
          */
         if (read_acpi_int(hotk->handle, "ASYM", &temp))
-                len +=
-                    sprintf(page + len, "ASYM value         : 0x%04x\n", temp);
+                seq_printf(m, "ASYM value         : 0x%04x\n", temp);
         if (asus_info) {
-                snprintf(buf, 16, "%d", asus_info->length);
-                len += sprintf(page + len, "DSDT length        : %s\n", buf);
-                snprintf(buf, 16, "%d", asus_info->checksum);
-                len += sprintf(page + len, "DSDT checksum      : %s\n", buf);
-                snprintf(buf, 16, "%d", asus_info->revision);
-                len += sprintf(page + len, "DSDT revision      : %s\n", buf);
-                snprintf(buf, 7, "%s", asus_info->oem_id);
-                len += sprintf(page + len, "OEM id             : %s\n", buf);
-                snprintf(buf, 9, "%s", asus_info->oem_table_id);
-                len += sprintf(page + len, "OEM table id       : %s\n", buf);
-                snprintf(buf, 16, "%x", asus_info->oem_revision);
-                len += sprintf(page + len, "OEM revision       : 0x%s\n", buf);
-                snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
-                len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
-                snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
-                len += sprintf(page + len, "ASL comp revision  : 0x%s\n", buf);
+                seq_printf(m, "DSDT length        : %d\n", asus_info->length);
+                seq_printf(m, "DSDT checksum      : %d\n", asus_info->checksum);
+                seq_printf(m, "DSDT revision      : %d\n", asus_info->revision);
+                seq_printf(m, "OEM id             : %.*s\n", ACPI_OEM_ID_SIZE, asus_info->oem_id);
+                seq_printf(m, "OEM table id       : %.*s\n", ACPI_OEM_TABLE_ID_SIZE, asus_info->oem_table_id);
+                seq_printf(m, "OEM revision       : 0x%x\n", asus_info->oem_revision);
+                seq_printf(m, "ASL comp vendor id : %.*s\n", ACPI_NAME_SIZE, asus_info->asl_compiler_id);
+                seq_printf(m, "ASL comp revision  : 0x%x\n", asus_info->asl_compiler_revision);
         }
 
-        return len;
+        return 0;
+}
+
+static int asus_info_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, asus_info_proc_show, NULL);
 }
 
+static const struct file_operations asus_info_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = asus_info_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
 /*
  * /proc handlers
  * We write our info in page, we begin at offset off and cannot write more
@@ -639,34 +629,48 @@ write_led(const char __user *buffer, unsigned long count,
 /*
  * Proc handlers for MLED
  */
-static int
-proc_read_mled(char *page, char **start, off_t off, int count, int *eof,
-               void *data)
+static int mled_proc_show(struct seq_file *m, void *v)
 {
-        return sprintf(page, "%d\n",
-                       read_led(hotk->methods->mled_status, MLED_ON));
+        seq_printf(m, "%d\n", read_led(hotk->methods->mled_status, MLED_ON));
+        return 0;
 }
 
-static int
-proc_write_mled(struct file *file, const char __user *buffer,
-                unsigned long count, void *data)
+static int mled_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, mled_proc_show, NULL);
+}
+
+static ssize_t mled_proc_write(struct file *file, const char __user *buffer,
+                size_t count, loff_t *pos)
 {
         return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
 }
 
+static const struct file_operations mled_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = mled_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .write          = mled_proc_write,
+};
+
 /*
  * Proc handlers for LED display
  */
-static int
-proc_read_ledd(char *page, char **start, off_t off, int count, int *eof,
-               void *data)
+static int ledd_proc_show(struct seq_file *m, void *v)
 {
-        return sprintf(page, "0x%08x\n", hotk->ledd_status);
+        seq_printf(m, "0x%08x\n", hotk->ledd_status);
+        return 0;
 }
 
-static int
-proc_write_ledd(struct file *file, const char __user *buffer,
-                unsigned long count, void *data)
+static int ledd_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, ledd_proc_show, NULL);
+}
+
+static ssize_t ledd_proc_write(struct file *file, const char __user *buffer,
+                size_t count, loff_t *pos)
 {
         int rv, value;
 
@@ -682,61 +686,104 @@ proc_write_ledd(struct file *file, const char __user *buffer,
         return rv;
 }
 
+static const struct file_operations ledd_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = ledd_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .write          = ledd_proc_write,
+};
+
 /*
  * Proc handlers for WLED
  */
-static int
-proc_read_wled(char *page, char **start, off_t off, int count, int *eof,
-               void *data)
+static int wled_proc_show(struct seq_file *m, void *v)
 {
-        return sprintf(page, "%d\n",
-                       read_led(hotk->methods->wled_status, WLED_ON));
+        seq_printf(m, "%d\n", read_led(hotk->methods->wled_status, WLED_ON));
+        return 0;
 }
 
-static int
-proc_write_wled(struct file *file, const char __user *buffer,
-                unsigned long count, void *data)
+static int wled_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, wled_proc_show, NULL);
+}
+
+static ssize_t wled_proc_write(struct file *file, const char __user *buffer,
+                size_t count, loff_t *pos)
 {
         return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
 }
 
+static const struct file_operations wled_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = wled_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .write          = wled_proc_write,
+};
+
 /*
  * Proc handlers for Bluetooth
  */
-static int
-proc_read_bluetooth(char *page, char **start, off_t off, int count, int *eof,
-                    void *data)
+static int bluetooth_proc_show(struct seq_file *m, void *v)
 {
-        return sprintf(page, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
+        seq_printf(m, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
+        return 0;
 }
 
-static int
-proc_write_bluetooth(struct file *file, const char __user *buffer,
-                     unsigned long count, void *data)
+static int bluetooth_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, bluetooth_proc_show, NULL);
+}
+
+static ssize_t bluetooth_proc_write(struct file *file,
+                const char __user *buffer, size_t count, loff_t *pos)
 {
         /* Note: mt_bt_switch controls both internal Bluetooth adapter's
            presence and its LED */
         return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
 }
 
+static const struct file_operations bluetooth_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = bluetooth_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .write          = bluetooth_proc_write,
+};
+
 /*
  * Proc handlers for TLED
  */
-static int
-proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
-               void *data)
+static int tled_proc_show(struct seq_file *m, void *v)
 {
-        return sprintf(page, "%d\n",
-                       read_led(hotk->methods->tled_status, TLED_ON));
+        seq_printf(m, "%d\n", read_led(hotk->methods->tled_status, TLED_ON));
+        return 0;
 }
 
-static int
-proc_write_tled(struct file *file, const char __user *buffer,
-                unsigned long count, void *data)
+static int tled_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, tled_proc_show, NULL);
+}
+
+static ssize_t tled_proc_write(struct file *file, const char __user *buffer,
+                size_t count, loff_t *pos)
 {
         return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
 }
 
+static const struct file_operations tled_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = tled_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .write          = tled_proc_write,
+};
+
 static int get_lcd_state(void)
 {
         int lcd = 0;
@@ -829,16 +876,19 @@ static int set_lcd_state(int value)
 
 }
 
-static int
-proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
-              void *data)
+static int lcd_proc_show(struct seq_file *m, void *v)
 {
-        return sprintf(page, "%d\n", get_lcd_state());
+        seq_printf(m, "%d\n", get_lcd_state());
+        return 0;
 }
 
-static int
-proc_write_lcd(struct file *file, const char __user *buffer,
-               unsigned long count, void *data)
+static int lcd_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, lcd_proc_show, NULL);
+}
+
+static ssize_t lcd_proc_write(struct file *file, const char __user *buffer,
+               size_t count, loff_t *pos)
 {
         int rv, value;
 
@@ -848,6 +898,15 @@ proc_write_lcd(struct file *file, const char __user *buffer,
         return rv;
 }
 
+static const struct file_operations lcd_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = lcd_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .write          = lcd_proc_write,
+};
+
 static int read_brightness(struct backlight_device *bd)
 {
         int value;
@@ -907,16 +966,19 @@ static int set_brightness_status(struct backlight_device *bd)
         return set_brightness(bd->props.brightness);
 }
 
-static int
-proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
-              void *data)
+static int brn_proc_show(struct seq_file *m, void *v)
 {
-        return sprintf(page, "%d\n", read_brightness(NULL));
+        seq_printf(m, "%d\n", read_brightness(NULL));
+        return 0;
 }
 
-static int
-proc_write_brn(struct file *file, const char __user *buffer,
-               unsigned long count, void *data)
+static int brn_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, brn_proc_show, NULL);
+}
+
+static ssize_t brn_proc_write(struct file *file, const char __user *buffer,
+               size_t count, loff_t *pos)
 {
         int rv, value;
 
@@ -929,6 +991,15 @@ proc_write_brn(struct file *file, const char __user *buffer,
         return rv;
 }
 
+static const struct file_operations brn_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = brn_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .write          = brn_proc_write,
+};
+
 static void set_display(int value)
 {
         /* no sanity check needed for now */
@@ -942,9 +1013,7 @@ static void set_display(int value)
  * Now, *this* one could be more user-friendly, but so far, no-one has
  * complained. The significance of bits is the same as in proc_write_disp()
  */
-static int
-proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
-               void *data)
+static int disp_proc_show(struct seq_file *m, void *v)
 {
         int value = 0;
 
@@ -952,7 +1021,13 @@ proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
                 printk(KERN_WARNING
                        "Asus ACPI: Error reading display status\n");
         value &= 0x07;  /* needed for some models, shouldn't hurt others */
-        return sprintf(page, "%d\n", value);
+        seq_printf(m, "%d\n", value);
+        return 0;
+}
+
+static int disp_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, disp_proc_show, NULL);
 }
 
 /*
@@ -961,9 +1036,8 @@ proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
  * (bitwise) of these will suffice. I never actually tested 3 displays hooked
  * up simultaneously, so be warned. See the acpi4asus README for more info.
  */
-static int
-proc_write_disp(struct file *file, const char __user *buffer,
-                unsigned long count, void *data)
+static ssize_t disp_proc_write(struct file *file, const char __user *buffer,
+                size_t count, loff_t *pos)
 {
         int rv, value;
 
@@ -973,25 +1047,27 @@ proc_write_disp(struct file *file, const char __user *buffer,
         return rv;
 }
 
-typedef int (proc_readfunc) (char *page, char **start, off_t off, int count,
-                             int *eof, void *data);
-typedef int (proc_writefunc) (struct file *file, const char __user *buffer,
-                              unsigned long count, void *data);
+static const struct file_operations disp_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = disp_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .write          = disp_proc_write,
+};
 
 static int
-asus_proc_add(char *name, proc_writefunc *writefunc,
-                     proc_readfunc *readfunc, mode_t mode,
+asus_proc_add(char *name, const struct file_operations *proc_fops, mode_t mode,
                      struct acpi_device *device)
 {
-        struct proc_dir_entry *proc =
-            create_proc_entry(name, mode, acpi_device_dir(device));
+        struct proc_dir_entry *proc;
+
+        proc = proc_create_data(name, mode, acpi_device_dir(device),
+                                proc_fops, acpi_driver_data(device));
         if (!proc) {
                 printk(KERN_WARNING "  Unable to create %s fs entry\n", name);
                 return -1;
         }
-        proc->write_proc = writefunc;
-        proc->read_proc = readfunc;
-        proc->data = acpi_driver_data(device);
         proc->uid = asus_uid;
         proc->gid = asus_gid;
         return 0;
@@ -1020,10 +1096,9 @@ static int asus_hotk_add_fs(struct acpi_device *device)
         if (!acpi_device_dir(device))
                 return -ENODEV;
 
-        proc = create_proc_entry(PROC_INFO, mode, acpi_device_dir(device));
+        proc = proc_create(PROC_INFO, mode, acpi_device_dir(device),
+                           &asus_info_proc_fops);
         if (proc) {
-                proc->read_proc = proc_read_info;
-                proc->data = acpi_driver_data(device);
                 proc->uid = asus_uid;
                 proc->gid = asus_gid;
         } else {
@@ -1032,28 +1107,23 @@ static int asus_hotk_add_fs(struct acpi_device *device)
         }
 
         if (hotk->methods->mt_wled) {
-                asus_proc_add(PROC_WLED, &proc_write_wled, &proc_read_wled,
-                              mode, device);
+                asus_proc_add(PROC_WLED, &wled_proc_fops, mode, device);
         }
 
         if (hotk->methods->mt_ledd) {
-                asus_proc_add(PROC_LEDD, &proc_write_ledd, &proc_read_ledd,
-                              mode, device);
+                asus_proc_add(PROC_LEDD, &ledd_proc_fops, mode, device);
         }
 
         if (hotk->methods->mt_mled) {
-                asus_proc_add(PROC_MLED, &proc_write_mled, &proc_read_mled,
-                              mode, device);
+                asus_proc_add(PROC_MLED, &mled_proc_fops, mode, device);
         }
 
         if (hotk->methods->mt_tled) {
-                asus_proc_add(PROC_TLED, &proc_write_tled, &proc_read_tled,
-                              mode, device);
+                asus_proc_add(PROC_TLED, &tled_proc_fops, mode, device);
         }
 
         if (hotk->methods->mt_bt_switch) {
-                asus_proc_add(PROC_BT, &proc_write_bluetooth,
-                              &proc_read_bluetooth, mode, device);
+                asus_proc_add(PROC_BT, &bluetooth_proc_fops, mode, device);
         }
 
         /*
@@ -1061,19 +1131,16 @@ static int asus_hotk_add_fs(struct acpi_device *device)
          * accessible from the keyboard
          */
         if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
-                asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode,
-                              device);
+                asus_proc_add(PROC_LCD, &lcd_proc_fops, mode, device);
         }
 
         if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
             (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
-                asus_proc_add(PROC_BRN, &proc_write_brn, &proc_read_brn, mode,
-                              device);
+                asus_proc_add(PROC_BRN, &brn_proc_fops, mode, device);
         }
 
         if (hotk->methods->display_set) {
-                asus_proc_add(PROC_DISP, &proc_write_disp, &proc_read_disp,
-                              mode, device);
+                asus_proc_add(PROC_DISP, &disp_proc_fops, mode, device);
         }
 
         return 0;