viafb: switch to seq_file

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Scott Fang <ScottFang@viatech.com.cn>
Cc: Joseph Chan <JosephChan@via.com.tw>
Cc: Harald Welte <laforge@gnumonks.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 110 insertions, 69 deletions

diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c
index 66921de373fe..7626325ed7f8 100644
--- a/drivers/video/via/viafbdev.c
+++ b/drivers/video/via/viafbdev.c
@@ -20,6 +20,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/seq_file.h>
 #define _MASTER_FILE
 
 #include "global.h"
@@ -1485,10 +1486,8 @@ static void parse_dvi_port(void)
  * DVP1Driving, DFPHigh, DFPLow CR96,   SR2A[5], SR1B[1], SR2A[4], SR1E[2],
  * CR9B,    SR65,    CR97,    CR99
  */
-static int viafb_dvp0_proc_read(char *buf, char **start, off_t offset,
-int count, int *eof, void *data)
+static int viafb_dvp0_proc_show(struct seq_file *m, void *v)
 {
-        int len = 0;
         u8 dvp0_data_dri = 0, dvp0_clk_dri = 0, dvp0 = 0;
         dvp0_data_dri =
             (viafb_read_reg(VIASR, SR2A) & BIT5) >> 4 |
@@ -1497,13 +1496,17 @@ int count, int *eof, void *data)
             (viafb_read_reg(VIASR, SR2A) & BIT4) >> 3 |
             (viafb_read_reg(VIASR, SR1E) & BIT2) >> 2;
         dvp0 = viafb_read_reg(VIACR, CR96) & 0x0f;
-        len +=
-            sprintf(buf + len, "%x %x %x\n", dvp0, dvp0_data_dri, dvp0_clk_dri);
-        *eof = 1;               /*Inform kernel end of data */
-        return len;
+        seq_printf(m, "%x %x %x\n", dvp0, dvp0_data_dri, dvp0_clk_dri);
+        return 0;
+}
+
+static int viafb_dvp0_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, viafb_dvp0_proc_show, NULL);
 }
-static int viafb_dvp0_proc_write(struct file *file,
-        const char __user *buffer, unsigned long count, void *data)
+
+static ssize_t viafb_dvp0_proc_write(struct file *file,
+        const char __user *buffer, size_t count, loff_t *pos)
 {
         char buf[20], *value, *pbuf;
         u8 reg_val = 0;
@@ -1547,21 +1550,33 @@ static int viafb_dvp0_proc_write(struct file *file,
         }
         return count;
 }
-static int viafb_dvp1_proc_read(char *buf, char **start, off_t offset,
-        int count, int *eof, void *data)
+
+static const struct file_operations viafb_dvp0_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = viafb_dvp0_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .write          = viafb_dvp0_proc_write,
+};
+
+static int viafb_dvp1_proc_show(struct seq_file *m, void *v)
 {
-        int len = 0;
         u8 dvp1 = 0, dvp1_data_dri = 0, dvp1_clk_dri = 0;
         dvp1 = viafb_read_reg(VIACR, CR9B) & 0x0f;
         dvp1_data_dri = (viafb_read_reg(VIASR, SR65) & 0x0c) >> 2;
         dvp1_clk_dri = viafb_read_reg(VIASR, SR65) & 0x03;
-        len +=
-            sprintf(buf + len, "%x %x %x\n", dvp1, dvp1_data_dri, dvp1_clk_dri);
-        *eof = 1;               /*Inform kernel end of data */
-        return len;
+        seq_printf(m, "%x %x %x\n", dvp1, dvp1_data_dri, dvp1_clk_dri);
+        return 0;
+}
+
+static int viafb_dvp1_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, viafb_dvp1_proc_show, NULL);
 }
-static int viafb_dvp1_proc_write(struct file *file,
-        const char __user *buffer, unsigned long count, void *data)
+
+static ssize_t viafb_dvp1_proc_write(struct file *file,
+        const char __user *buffer, size_t count, loff_t *pos)
 {
         char buf[20], *value, *pbuf;
         u8 reg_val = 0;
@@ -1600,18 +1615,30 @@ static int viafb_dvp1_proc_write(struct file *file,
         return count;
 }
 
-static int viafb_dfph_proc_read(char *buf, char **start, off_t offset,
-        int count, int *eof, void *data)
+static const struct file_operations viafb_dvp1_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = viafb_dvp1_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .write          = viafb_dvp1_proc_write,
+};
+
+static int viafb_dfph_proc_show(struct seq_file *m, void *v)
 {
-        int len = 0;
         u8 dfp_high = 0;
         dfp_high = viafb_read_reg(VIACR, CR97) & 0x0f;
-        len += sprintf(buf + len, "%x\n", dfp_high);
-        *eof = 1;               /*Inform kernel end of data */
-        return len;
+        seq_printf(m, "%x\n", dfp_high);
+        return 0;
 }
-static int viafb_dfph_proc_write(struct file *file,
-        const char __user *buffer, unsigned long count, void *data)
+
+static int viafb_dfph_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, viafb_dfph_proc_show, NULL);
+}
+
+static ssize_t viafb_dfph_proc_write(struct file *file,
+        const char __user *buffer, size_t count, loff_t *pos)
 {
         char buf[20];
         u8 reg_val = 0;
@@ -1626,18 +1653,31 @@ static int viafb_dfph_proc_write(struct file *file,
         viafb_write_reg_mask(CR97, VIACR, reg_val, 0x0f);
         return count;
 }
-static int viafb_dfpl_proc_read(char *buf, char **start, off_t offset,
-        int count, int *eof, void *data)
+
+static const struct file_operations viafb_dfph_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = viafb_dfph_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .write          = viafb_dfph_proc_write,
+};
+
+static int viafb_dfpl_proc_show(struct seq_file *m, void *v)
 {
-        int len = 0;
         u8 dfp_low = 0;
         dfp_low = viafb_read_reg(VIACR, CR99) & 0x0f;
-        len += sprintf(buf + len, "%x\n", dfp_low);
-        *eof = 1;               /*Inform kernel end of data */
-        return len;
+        seq_printf(m, "%x\n", dfp_low);
+        return 0;
+}
+
+static int viafb_dfpl_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, viafb_dfpl_proc_show, NULL);
 }
-static int viafb_dfpl_proc_write(struct file *file,
-        const char __user *buffer, unsigned long count, void *data)
+
+static ssize_t viafb_dfpl_proc_write(struct file *file,
+        const char __user *buffer, size_t count, loff_t *pos)
 {
         char buf[20];
         u8 reg_val = 0;
@@ -1652,10 +1692,18 @@ static int viafb_dfpl_proc_write(struct file *file,
         viafb_write_reg_mask(CR99, VIACR, reg_val, 0x0f);
         return count;
 }
-static int viafb_vt1636_proc_read(char *buf, char **start,
-        off_t offset, int count, int *eof, void *data)
+
+static const struct file_operations viafb_dfpl_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = viafb_dfpl_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .write          = viafb_dfpl_proc_write,
+};
+
+static int viafb_vt1636_proc_show(struct seq_file *m, void *v)
 {
-        int len = 0;
         u8 vt1636_08 = 0, vt1636_09 = 0;
         switch (viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
         case VT1636_LVDS:
@@ -1665,7 +1713,7 @@ static int viafb_vt1636_proc_read(char *buf, char **start,
                 vt1636_09 =
                     viafb_gpio_i2c_read_lvds(viaparinfo->lvds_setting_info,
                     &viaparinfo->chip_info->lvds_chip_info, 0x09) & 0x1f;
-                len += sprintf(buf + len, "%x %x\n", vt1636_08, vt1636_09);
+                seq_printf(m, "%x %x\n", vt1636_08, vt1636_09);
                 break;
         default:
                 break;
@@ -1678,16 +1726,21 @@ static int viafb_vt1636_proc_read(char *buf, char **start,
                 vt1636_09 =
                     viafb_gpio_i2c_read_lvds(viaparinfo->lvds_setting_info2,
                         &viaparinfo->chip_info->lvds_chip_info2, 0x09) & 0x1f;
-                len += sprintf(buf + len, " %x %x\n", vt1636_08, vt1636_09);
+                seq_printf(m, " %x %x\n", vt1636_08, vt1636_09);
                 break;
         default:
                 break;
         }
-        *eof = 1;               /*Inform kernel end of data */
-        return len;
+        return 0;
 }
-static int viafb_vt1636_proc_write(struct file *file,
-        const char __user *buffer, unsigned long count, void *data)
+
+static int viafb_vt1636_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, viafb_vt1636_proc_show, NULL);
+}
+
+static ssize_t viafb_vt1636_proc_write(struct file *file,
+        const char __user *buffer, size_t count, loff_t *pos)
 {
         char buf[30], *value, *pbuf;
         struct IODATA reg_val;
@@ -1776,39 +1829,27 @@ static int viafb_vt1636_proc_write(struct file *file,
         return count;
 }
 
+static const struct file_operations viafb_vt1636_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = viafb_vt1636_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .write          = viafb_vt1636_proc_write,
+};
+
 static void viafb_init_proc(struct proc_dir_entry **viafb_entry)
 {
-        struct proc_dir_entry *entry;
         *viafb_entry = proc_mkdir("viafb", NULL);
         if (viafb_entry) {
-                entry = create_proc_entry("dvp0", 0, *viafb_entry);
-                if (entry) {
-                        entry->read_proc = viafb_dvp0_proc_read;
-                        entry->write_proc = viafb_dvp0_proc_write;
-                }
-                entry = create_proc_entry("dvp1", 0, *viafb_entry);
-                if (entry) {
-                        entry->read_proc = viafb_dvp1_proc_read;
-                        entry->write_proc = viafb_dvp1_proc_write;
-                }
-                entry = create_proc_entry("dfph", 0, *viafb_entry);
-                if (entry) {
-                        entry->read_proc = viafb_dfph_proc_read;
-                        entry->write_proc = viafb_dfph_proc_write;
-                }
-                entry = create_proc_entry("dfpl", 0, *viafb_entry);
-                if (entry) {
-                        entry->read_proc = viafb_dfpl_proc_read;
-                        entry->write_proc = viafb_dfpl_proc_write;
-                }
+                proc_create("dvp0", 0, *viafb_entry, &viafb_dvp0_proc_fops);
+                proc_create("dvp1", 0, *viafb_entry, &viafb_dvp1_proc_fops);
+                proc_create("dfph", 0, *viafb_entry, &viafb_dfph_proc_fops);
+                proc_create("dfpl", 0, *viafb_entry, &viafb_dfpl_proc_fops);
                 if (VT1636_LVDS == viaparinfo->chip_info->lvds_chip_info.
                         lvds_chip_name || VT1636_LVDS ==
                     viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name) {
-                        entry = create_proc_entry("vt1636", 0, *viafb_entry);
-                        if (entry) {
-                                entry->read_proc = viafb_vt1636_proc_read;
-                                entry->write_proc = viafb_vt1636_proc_write;
-                        }
+                        proc_create("vt1636", 0, *viafb_entry, &viafb_vt1636_proc_fops);
                 }
 
         }