Re: [PATCH 10/12] i2c-omap: convert 'rev1' flag to generic 'rev' u8

[Ben Dooks <ben-linux@fluff.org>]

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@pwsan.com>
> > 
> > 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@pwsan.com>
> > Signed-off-by: Tony Lindgren <tony@atomide.com>
> > ---
> >  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.

-- 
Ben (ben@fluff.org, http://www.fluff.org/)

  'a smiley only costs 4 bytes'