[PATCH] chardev: GPIO for SCx200 & PC-8736x: use dev_dbg in common module
Use of dev_dbg() and friends is considered good practice. dev_dbg() needs a
struct device *devp, but nsc_gpio is only a helper module, so it doesnt
have/need its own. To provide devp to the user-modules (scx200 & pc8736x
_gpio), we add it to the vtable, and set it during init.
Also squeeze nsc_gpio_dump()'s format a little.
[ 199.259879] pc8736x_gpio.0: io09: 0x0044 TS OD PUE EDGE LO DEBOUNCE
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/char/nsc_gpio.c b/drivers/char/nsc_gpio.c
index 929d684..d0b5d65 100644
--- a/drivers/char/nsc_gpio.c
+++ b/drivers/char/nsc_gpio.c
@@ -14,22 +14,27 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/nsc_gpio.h>
+#include <linux/platform_device.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#define NAME "nsc_gpio"
-void nsc_gpio_dump(unsigned index, u32 config)
+void nsc_gpio_dump(struct nsc_gpio_ops *amp, unsigned index)
{
- printk(KERN_INFO NAME ": GPIO-%02u: 0x%08lx %s %s %s %s %s %s %s\n",
- index, (unsigned long)config,
- (config & 1) ? "OE" : "TS", /* output-enabled/tristate */
- (config & 2) ? "PP" : "OD", /* push pull / open drain */
- (config & 4) ? "PUE" : "PUD", /* pull up enabled/disabled */
- (config & 8) ? "LOCKED" : "", /* locked / unlocked */
- (config & 16) ? "LEVEL" : "EDGE",/* level/edge input */
- (config & 32) ? "HI" : "LO", /* trigger on rise/fall edge */
- (config & 64) ? "DEBOUNCE" : ""); /* debounce */
+ /* retrieve current config w/o changing it */
+ u32 config = amp->gpio_config(index, ~0, 0);
+
+ /* user requested via 'v' command, so its INFO */
+ dev_info(amp->dev, "io%02u: 0x%04x %s %s %s %s %s %s %s\n",
+ index, config,
+ (config & 1) ? "OE" : "TS", /* output-enabled/tristate */
+ (config & 2) ? "PP" : "OD", /* push pull / open drain */
+ (config & 4) ? "PUE" : "PUD", /* pull up enabled/disabled */
+ (config & 8) ? "LOCKED" : "", /* locked / unlocked */
+ (config & 16) ? "LEVEL" : "EDGE",/* level/edge input */
+ (config & 32) ? "HI" : "LO", /* trigger on rise/fall edge */
+ (config & 64) ? "DEBOUNCE" : ""); /* debounce */
}
ssize_t nsc_gpio_write(struct file *file, const char __user *data,
@@ -37,6 +42,7 @@
{
unsigned m = iminor(file->f_dentry->d_inode);
struct nsc_gpio_ops *amp = file->private_data;
+ struct device *dev = amp->dev;
size_t i;
int err = 0;
@@ -52,42 +58,41 @@
amp->gpio_set(m, 1);
break;
case 'O':
- printk(KERN_INFO NAME ": GPIO%d output enabled\n", m);
+ dev_dbg(dev, "GPIO%d output enabled\n", m);
amp->gpio_config(m, ~1, 1);
break;
case 'o':
- printk(KERN_INFO NAME ": GPIO%d output disabled\n", m);
+ dev_dbg(dev, "GPIO%d output disabled\n", m);
amp->gpio_config(m, ~1, 0);
break;
case 'T':
- printk(KERN_INFO NAME ": GPIO%d output is push pull\n",
+ dev_dbg(dev, "GPIO%d output is push pull\n",
m);
amp->gpio_config(m, ~2, 2);
break;
case 't':
- printk(KERN_INFO NAME ": GPIO%d output is open drain\n",
+ dev_dbg(dev, "GPIO%d output is open drain\n",
m);
amp->gpio_config(m, ~2, 0);
break;
case 'P':
- printk(KERN_INFO NAME ": GPIO%d pull up enabled\n", m);
+ dev_dbg(dev, "GPIO%d pull up enabled\n", m);
amp->gpio_config(m, ~4, 4);
break;
case 'p':
- printk(KERN_INFO NAME ": GPIO%d pull up disabled\n", m);
+ dev_dbg(dev, "GPIO%d pull up disabled\n", m);
amp->gpio_config(m, ~4, 0);
break;
case 'v':
/* View Current pin settings */
- amp->gpio_dump(m);
+ amp->gpio_dump(amp, m);
break;
case '\n':
/* end of settings string, do nothing */
break;
default:
- printk(KERN_ERR NAME
- ": GPIO-%2d bad setting: chr<0x%2x>\n", m,
- (int)c);
+ dev_err(dev, "io%2d bad setting: chr<0x%2x>\n",
+ m, (int)c);
err++;
}
}