* Ben Dooks <ben-linux@xxxxxxxxx> [081216 14:07]:
> On Tue, Dec 16, 2008 at 09:59:59PM +0000, Ben Dooks wrote:
> > On Fri, Nov 28, 2008 at 05:34:57PM -0800, Tony Lindgren wrote:
> > > From: Paul Walmsley <paul@xxxxxxxxx>
> > >
> > > i2c-omap discriminates only between "revision 1" or "greater than
> > > revision 1." A following patch introduces code that must also
> > > discriminate between rev2.x, rev3.6, and rev3.12 controllers. Support
> > > this by storing the full revision data from the I2C_REV register, rather
> > > than just a single bit.
> > >
> > > The revision definitions may need to be extended for other ES levels
> > > that aren't currently available here. rev3.6 is what's present on the
> > > 2430SDP here (unknown ES revision); rev3.12 is used on the 3430ES2
> > > here.
> > >
> > > Signed-off-by: Paul Walmsley <paul@xxxxxxxxx>
> > > Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
> > > ---
> > > drivers/i2c/busses/i2c-omap.c | 25 ++++++++++++++++---------
> > > 1 files changed, 16 insertions(+), 9 deletions(-)
> > >
> > > diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
> > > index 40a1e4b..3ac510d 100644
> > > --- a/drivers/i2c/busses/i2c-omap.c
> > > +++ b/drivers/i2c/busses/i2c-omap.c
> > > @@ -38,6 +38,13 @@
> > > #include <linux/clk.h>
> > > #include <linux/io.h>
> > >
> > > +/* I2C controller revisions */
> > > +#define OMAP_I2C_REV_2 0x20
> > > +
> > > +/* I2C controller revisions present on specific hardware */
> > > +#define OMAP_I2C_REV_ON_2430 0x36
> > > +#define OMAP_I2C_REV_ON_3430 0x3C
> > > +
> > > /* timeout waiting for the controller to respond */
> > > #define OMAP_I2C_TIMEOUT (msecs_to_jiffies(1000))
> > >
> > > @@ -139,7 +146,7 @@ struct omap_i2c_dev {
> > > * fifo_size==0 implies no fifo
> > > * if set, should be trsh+1
> > > */
> > > - unsigned rev1:1;
> > > + u8 rev;
> > > unsigned b_hw:1; /* bad h/w fixes */
> > > unsigned idle:1;
> > > u16 iestate; /* Saved interrupt register */
> > > @@ -209,7 +216,7 @@ static void omap_i2c_idle(struct omap_i2c_dev *dev)
> > >
> > > dev->iestate = omap_i2c_read_reg(dev, OMAP_I2C_IE_REG);
> > > omap_i2c_write_reg(dev, OMAP_I2C_IE_REG, 0);
> > > - if (dev->rev1) {
> > > + if (dev->rev < OMAP_I2C_REV_2) {
> > > iv = omap_i2c_read_reg(dev, OMAP_I2C_IV_REG); /* Read clears */
> > > } else {
> > > omap_i2c_write_reg(dev, OMAP_I2C_STAT_REG, dev->iestate);
> > > @@ -231,7 +238,7 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
> > > unsigned long timeout;
> > > unsigned long internal_clk = 0;
> > >
> > > - if (!dev->rev1) {
> > > + if (dev->rev >= OMAP_I2C_REV_2) {
> > > omap_i2c_write_reg(dev, OMAP_I2C_SYSC_REG, OMAP_I2C_SYSC_SRST);
> > > /* For some reason we need to set the EN bit before the
> > > * reset done bit gets set. */
> > > @@ -710,6 +717,7 @@ omap_i2c_probe(struct platform_device *pdev)
> > > struct omap_i2c_dev *dev;
> > > struct i2c_adapter *adap;
> > > struct resource *mem, *irq, *ioarea;
> > > + void *isr;
> >
> > There is a proper definition for the function type in
> > <linux/interrupt.h>
>
> I'm feeling a bit of Christmas spirit finally, will pull these and
> add a fix myself for this.
Thanks, I'll owe you a holiday ale for that :)
Tony
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