On Thu, Jul 12, 2012 at 03:31:57PM +0200, Wolfram Sang wrote:
> On Tue, Jul 10, 2012 at 11:40:56AM +0530, Jayachandran C wrote:
> > From: Ganesan Ramalingam <[email protected]>
> >
> > Deprecate 'regstep' property and use the standard 'reg-shift' property
> > for register offset shifts. 'regstep' will still be supported as an
> > optional property, but will give a warning when used.
> >
> > Signed-off-by: Ganesan Ramalingam <[email protected]>
> > Signed-off-by: Jayachandran C <[email protected]>
> > ---
> > .../devicetree/bindings/i2c/i2c-ocores.txt | 8 +++--
> > drivers/i2c/busses/i2c-ocores.c | 36
> > ++++++++++++--------
> > include/linux/i2c-ocores.h | 6 ++--
> > 3 files changed, 31 insertions(+), 19 deletions(-)
> >
[...]
> > diff --git a/drivers/i2c/busses/i2c-ocores.c
> > b/drivers/i2c/busses/i2c-ocores.c
> > index e8159db..9617ec1 100644
> > --- a/drivers/i2c/busses/i2c-ocores.c
> > +++ b/drivers/i2c/busses/i2c-ocores.c
> > @@ -25,10 +25,11 @@
> > #include <linux/slab.h>
> > #include <linux/io.h>
> > #include <linux/of_i2c.h>
> > +#include <linux/log2.h>
> >
> > struct ocores_i2c {
> > void __iomem *base;
> > - int regstep;
> > + int reg_shift;
>
> Should be u32 since you use of_property_read_u32(). sparse tells you
> that.
We can keep reg_shift as int (fixing the width for reg_shift to 32
is unnecessary), and use a u32 to read the property, see below
> > + struct device_node *np = pdev->dev.of_node;
> > + u32 val;
> > +
> > + if (of_property_read_u32(np, "reg-shift", &i2c->reg_shift)) {
> > + /* no 'reg-shift', check for deprecated 'regstep' */
> > + if (!of_property_read_u32(np, "regstep", &val)) {
> > + if (!is_power_of_2(val)) {
> > + dev_err(&pdev->dev, "invalid regstep %d\n",
> > + val);
> > + return -EINVAL;
> > + }
> > + i2c->reg_shift = ilog2(val);
> > + dev_warn(&pdev->dev,
> > + "regstep property deprecated, use reg-shift\n");
> > + }
> > }
Will change this to
if (of_property_read_u32(np, "reg-shift", &val)) {
....
} else
i2c->reg_shift = val;
[...]
> > diff --git a/include/linux/i2c-ocores.h b/include/linux/i2c-ocores.h
> > index 4d5e57f..bb58c7d 100644
> > --- a/include/linux/i2c-ocores.h
> > +++ b/include/linux/i2c-ocores.h
> > @@ -12,9 +12,9 @@
> > #define _LINUX_I2C_OCORES_H
> >
> > struct ocores_i2c_platform_data {
> > - u32 regstep; /* distance between registers */
> > - u32 clock_khz; /* input clock in kHz */
> > - u8 num_devices; /* number of devices in the devices list */
> > + u32 reg_shift; /* register offset shift value */
> > + u32 clock_khz; /* input clock in kHz */
> > + u8 num_devices; /* number of devices in the devices list */
>
> Minor: I'd like to keep the changes here minimal, so 'git blame' will be more
> useful. Given the line below, indentation is not consisten anyhow.
Ok, I will post an updated patchset with the changes.
Regards,
JC.
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