On Wed, 14 Nov 2012, Lee Jones wrote:
> Now we can register the BU21013_ts touch screen when booting with
> Device Tree enabled. Here we parse all the necessary components
> previously expected to be passed from platform data.
>
> Cc: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
> Cc: linux-input@xxxxxxxxxxxxxxx
> Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
> Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
> ---
> drivers/input/touchscreen/bu21013_ts.c | 39 ++++++++++++++++++++++++++++----
> 1 file changed, 35 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/input/touchscreen/bu21013_ts.c b/drivers/input/touchscreen/bu21013_ts.c
> index 5d8fc75..afef874 100644
> --- a/drivers/input/touchscreen/bu21013_ts.c
> +++ b/drivers/input/touchscreen/bu21013_ts.c
> @@ -15,6 +15,8 @@
> #include <linux/regulator/consumer.h>
> #include <linux/module.h>
> #include <linux/gpio.h>
> +#include <linux/of.h>
> +#include <linux/of_gpio.h>
>
> /* Reference tracking for multiple displays. */
> static int bu21013_devices = 0;
> @@ -487,13 +489,33 @@ static void bu21013_free_irq(struct bu21013_ts_data *bu21013_data)
> * This function used to initializes the i2c-client touchscreen
> * driver and returns integer.
> */
> +static void __devinit bu21013_of_probe(struct device_node *np,
> + struct bu21013_platform_device *pdata)
> +{
> + pdata->y_flip = pdata->x_flip = false;
> +
> + if (of_get_property(np, "rohm,flip-x", NULL))
> + pdata->x_flip = true;
> +
> + if (of_get_property(np, "rohm,flip-y", NULL))
> + pdata->y_flip = true;
> +
> + of_property_read_u32(np, "rohm,touch-max-x", &pdata->touch_x_max);
> + of_property_read_u32(np, "rohm,touch-max-y", &pdata->touch_y_max);
> +
> + pdata->touch_pin = of_get_named_gpio(np, "touch-gpio", 0);
> + pdata->cs_pin = of_get_named_gpio(np, "reset-gpio", 0);
> +
> + pdata->ext_clk = false;
> +}
> +
> static int __devinit bu21013_probe(struct i2c_client *client,
> const struct i2c_device_id *id)
> {
> struct bu21013_ts_data *bu21013_data;
> struct input_dev *in_dev;
> - const struct bu21013_platform_device *pdata =
> - client->dev.platform_data;
> + struct device_node *np = client->dev.of_node;
> + struct bu21013_platform_device *pdata = client->dev.platform_data;
> int error;
>
> if (!i2c_check_functionality(client->adapter,
> @@ -503,8 +525,17 @@ static int __devinit bu21013_probe(struct i2c_client *client,
> }
>
> if (!pdata) {
> - dev_err(&client->dev, "platform data not defined\n");
> - return -EINVAL;
> + if (np) {
> + pdata = devm_kzalloc(&client->dev, sizeof(*pdata),
> + GFP_KERNEL);
> + if (!pdata)
> + return -ENOMEM;
> +
> + bu21013_of_probe(np, pdata);
> + } else {
> + dev_err(&client->dev, "no device tree or platform data\n");
> + return -EINVAL;
> + }
> }
>
> pdata->irq = gpio_to_irq(pdata->touch_pin);
> --
> 1.7.9.5
>
Friendly poke for Dmitry.
--
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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