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mfd: Refactor WM831x chip identification

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Better support future device revisions by moving some of the output
around and making the chip ID enumeration be the value expected in
the ID register.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Mark Brown 2009-10-01 15:41:04 +01:00 committed by Samuel Ortiz
parent 29f02646f0
commit 894362f531
1 changed files with 18 additions and 40 deletions
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58
drivers/mfd/wm831x-core.c
View file

@ -90,9 +90,9 @@ int wm831x_isinkv_values[WM831X_ISINK_MAX_ISEL + 1] = {
EXPORT_SYMBOL_GPL(wm831x_isinkv_values);
enum wm831x_parent {
WM8310 = 0,
WM8311 = 1,
WM8312 = 2,
WM8310 = 0x8310,
WM8311 = 0x8311,
WM8312 = 0x8312,
};
static int wm831x_reg_locked(struct wm831x *wm831x, unsigned short reg)
@ -1282,50 +1282,28 @@ static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
goto err;
}
/* Some engineering samples do not have the ID set, rely on
* the device being registered correctly.
*/
if (ret == 0) {
dev_info(wm831x->dev, "Device is an engineering sample\n");
ret = id;
}
switch (ret) {
case 0x8310:
case WM8310:
parent = WM8310;
switch (rev) {
case 0:
dev_info(wm831x->dev, "WM8310 revision %c\n",
'A' + rev);
break;
}
dev_info(wm831x->dev, "WM8310 revision %c\n", 'A' + rev);
break;
case 0x8311:
case WM8311:
parent = WM8311;
switch (rev) {
case 0:
dev_info(wm831x->dev, "WM8311 revision %c\n",
'A' + rev);
break;
}
dev_info(wm831x->dev, "WM8311 revision %c\n", 'A' + rev);
break;
case 0x8312:
case WM8312:
parent = WM8312;
switch (rev) {
case 0:
dev_info(wm831x->dev, "WM8312 revision %c\n",
'A' + rev);
break;
}
break;
case 0:
/* Some engineering samples do not have the ID set,
* rely on the device being registered correctly.
* This will need revisiting for future devices with
* multiple dies.
*/
parent = id;
switch (rev) {
case 0:
dev_info(wm831x->dev, "WM831%d ES revision %c\n",
parent, 'A' + rev);
break;
}
dev_info(wm831x->dev, "WM8312 revision %c\n", 'A' + rev);
break;
default:
@ -1338,7 +1316,7 @@ static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
* current parts.
*/
if (parent != id)
dev_warn(wm831x->dev, "Device was registered as a WM831%lu\n",
dev_warn(wm831x->dev, "Device was registered as a WM%lx\n",
id);
/* Bootstrap the user key */