/**
* wm831x_bulk_read: Read multiple WM831x registers
*
* @wm831x: Device to read from
* @reg: First register
* @count: Number of registers
* @buf: Buffer to fill.
*/
int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg,
int count, u16 *buf)
{
int ret;
mutex_lock(&wm831x->io_lock);
ret = wm831x_read(wm831x, reg, count * 2, buf);
mutex_unlock(&wm831x->io_lock);
return ret;
}
/**
* wm831x_reg_read: Read a single WM831x register.
*
* @wm831x: Device to read from.
* @reg: Register to read.
*/
int wm831x_reg_read(struct wm831x *wm831x, unsigned short reg)
{
unsigned short val;
int ret;
mutex_lock(&wm831x->io_lock);
ret = wm831x_read(wm831x, reg, 2, &val);
mutex_unlock(&wm831x->io_lock);
if (ret < 0)
return ret;
else
return val;
}
/**
* wm831x_set_bits: Set the value of a bitfield in a WM831x register
*
* @wm831x: Device to write to.
* @reg: Register to write to.
* @mask: Mask of bits to set.
* @val: Value to set (unshifted)
*/
int wm831x_set_bits(struct wm831x *wm831x, unsigned short reg,
unsigned short mask, unsigned short val)
{
int ret;
u16 r;
mutex_lock(&wm831x->io_lock);
ret = wm831x_read(wm831x, reg, 2, &r);
if (ret < 0)
goto out;
r &= ~mask;
r |= val & mask;
ret = wm831x_write(wm831x, reg, 2, &r);
out:
mutex_unlock(&wm831x->io_lock);
return ret;
}
