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.
> + }
>
> err = request_irq(ts_dev->irq, titsc_irq,
> 0, pdev->dev.driver->name, ts_dev);
> --
> 1.7.0.4
>
>
Thanks.
--
Dmitry
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