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mfd: Add initialisation callback for WM8350 

Some functions of the WM8350 require board-specific initialisation on
startup. Provide a callback to the WM8350 driver in platform data
for platforms to use to configure the chip.  Use of a callback allows
platforms to control the ordering of initialisation which can be
important.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Samuel Ortiz <sameo@openedhand.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Mark Brown 2008-10-10 15:58:13 +01:00 committed by Liam Girdwood
parent 0e72039332
commit bcdd4efc1b
3 changed files with 25 additions and 3 deletions
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12
drivers/mfd/wm8350-core.c
View File

@ -388,7 +388,8 @@ out:
}
EXPORT_SYMBOL_GPL(wm8350_create_cache);
int wm8350_device_init(struct wm8350 *wm8350)
int wm8350_device_init(struct wm8350 *wm8350,
struct wm8350_platform_data *pdata)
{
int ret = -EINVAL;
u16 id1, id2, mask, mode;
@ -439,6 +440,15 @@ int wm8350_device_init(struct wm8350 *wm8350)
return ret;
}
if (pdata->init) {
ret = pdata->init(wm8350);
if (ret != 0) {
dev_err(wm8350->dev, "Platform init() failed: %d\n",
ret);
goto err;
}
}
return 0;
err:

2
drivers/mfd/wm8350-i2c.c
View File

@ -65,7 +65,7 @@ static int wm8350_i2c_probe(struct i2c_client *i2c,
wm8350->read_dev = wm8350_i2c_read_device;
wm8350->write_dev = wm8350_i2c_write_device;
ret = wm8350_device_init(wm8350);
ret = wm8350_device_init(wm8350, i2c->dev.platform_data);
if (ret < 0)
goto err;

14
include/linux/mfd/wm8350/core.h
View File

@ -564,10 +564,22 @@ struct wm8350 {
u16 *reg_cache;
};
/**
* Data to be supplied by the platform to initialise the WM8350.
*
* @init: Function called during driver initialisation. Should be
* used by the platform to configure GPIO functions and similar.
*/
struct wm8350_platform_data {
int (*init)(struct wm8350 *wm8350);
};
/*
* WM8350 device initialisation and exit.
*/
int wm8350_device_init(struct wm8350 *wm8350);
int wm8350_device_init(struct wm8350 *wm8350,
struct wm8350_platform_data *pdata);
void wm8350_device_exit(struct wm8350 *wm8350);
/*