Hi Dmitry,
On Thu, Nov 22, 2012 at 00:02:23, Dmitry Torokhov wrote:
> Hi Rachna,
>
> On Wed, Nov 07, 2012 at 12:22:03PM +0530, Patil, Rachna wrote:
> > Add DT support for client touchscreen driver
> >
> > Signed-off-by: Patil, Rachna <rachna@xxxxxx>
> > ---
> > drivers/input/touchscreen/ti_am335x_tsc.c | 60 ++++++++++++++++++++++++-----
> > 1 files changed, 50 insertions(+), 10 deletions(-)
> >
> > diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c
> > b/drivers/input/touchscreen/ti_am335x_tsc.c
> > index 7a26810..c063cf6 100644
> > --- a/drivers/input/touchscreen/ti_am335x_tsc.c
> > +++ b/drivers/input/touchscreen/ti_am335x_tsc.c
> > @@ -26,6 +26,8 @@
> > #include <linux/io.h>
> > #include <linux/input/ti_am335x_tsc.h> #include <linux/delay.h>
> > +#include <linux/of.h>
> > +#include <linux/of_device.h>
> >
> > #include <linux/mfd/ti_am335x_tscadc.h>
> >
> > @@ -398,12 +400,18 @@ static int __devinit titsc_probe(struct platform_device *pdev)
> > struct titsc *ts_dev;
> > struct input_dev *input_dev;
> > struct ti_tscadc_dev *tscadc_dev = pdev->dev.platform_data;
> > - struct mfd_tscadc_board *pdata;
> > - int err;
> > -
> > - pdata = tscadc_dev->dev->platform_data;
> > -
> > - if (!pdata) {
> > + int err, i;
> > + struct mfd_tscadc_board *pdata = NULL;
> > + struct device_node *node = NULL;
> > + u32 val32, wires_conf[4];
> > +
> > + if (tscadc_dev->dev->of_node) {
> > + node = tscadc_dev->dev->of_node;
> > + node = of_find_node_by_name(node, "tsc");
> > + } else
> > + pdata = tscadc_dev->dev->platform_data;
> > +
> > + if (!pdata && !node) {
> > dev_err(&pdev->dev, "Could not find platform data\n");
> > return -EINVAL;
> > }
> > @@ -421,11 +429,43 @@ static int __devinit titsc_probe(struct platform_device *pdev)
> > ts_dev->mfd_tscadc = tscadc_dev;
> > ts_dev->input = input_dev;
> > ts_dev->irq = tscadc_dev->irq;
> > - ts_dev->wires = pdata->tsc_init->wires;
> > - ts_dev->x_plate_resistance = pdata->tsc_init->x_plate_resistance;
> > - ts_dev->steps_to_configure = pdata->tsc_init->steps_to_configure;
> > - memcpy(ts_dev->config_inp, pdata->tsc_init->wire_config,
> > +
> > + if (node) {
> > + err = of_property_read_u32(node, "wires", &val32);
> > + if (err < 0)
> > + goto err_free_mem;
> > + else
> > + ts_dev->wires = val32;
> > +
> > + err = of_property_read_u32(node, "x-plate-resistance", &val32);
> > + if (err < 0)
> > + goto err_free_mem;
> > + else
> > + ts_dev->x_plate_resistance = val32;
> > +
> > + err = of_property_read_u32(node, "steps-to-configure", &val32);
> > + if (err < 0)
> > + goto err_free_mem;
> > + else
> > + ts_dev->steps_to_configure = val32;
> > +
> > + err = of_property_read_u32_array(node, "wire-config",
> > + wires_conf, ARRAY_SIZE(wires_conf));
> > + if (err < 0)
> > + goto err_free_mem;
> > + else {
> > + for (i = 0; i < ARRAY_SIZE(wires_conf); i++)
> > + ts_dev->config_inp[i] = wires_conf[i];
> > + }
> > + } else {
> > + ts_dev->wires = pdata->tsc_init->wires;
> > + ts_dev->x_plate_resistance =
> > + pdata->tsc_init->x_plate_resistance;
> > + ts_dev->steps_to_configure =
> > + pdata->tsc_init->steps_to_configure;
> > + memcpy(ts_dev->config_inp, pdata->tsc_init->wire_config,
> > sizeof(pdata->tsc_init->wire_config));
>
> I believe if platform data is supplied it should take precedence over DT data so that parameters can be adjusted if really needed.
Ok. I will fix this is in v2.
Regards,
Rachna
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