Hi Lee,
On Mon, Nov 26, 2012 at 12:01:43PM +0000, Lee Jones wrote:
> /**
> + * bu21013_gpio_board_init() - configures the touch panel
> + * @reset_pin: reset pin number
> + *
> + * This function is used to configure the voltage and
> + * reset the touch panel controller.
> + */
> +static int bu21013_gpio_board_init(int reset_pin)
> +{
> + int retval = 0;
> +
> + retval = gpio_request_one(reset_pin, GPIOF_INIT_HIGH, "touchp_reset");
Also need to specify dircetion (even though it defaults to output).
> + if (retval) {
> + printk(KERN_ERR "Unable to request gpio reset_pin");
> + return retval;
> + }
> +
> + return retval;
> +}
> +
> +/**
> + * bu21013_gpio_board_exit() - deconfigures the touch panel controller
> + * @reset_pin: reset pin number
> + *
> + * This function is used to deconfigure the chip selection
> + * for touch panel controller.
> + */
> +static int bu21013_gpio_board_exit(int reset_pin)
> +{
> + int retval = 0;
> +
> + retval = gpio_direction_output(reset_pin, 0);
> + if (retval < 0) {
> + printk(KERN_ERR "%s: gpio direction failed\n",
> + __func__);
> + return retval;
You should not return here, as gpio has to be freed even if you unable
to toggle it.
> + }
> + gpio_set_value(reset_pin, 0);
> + gpio_free(reset_pin);
> +
> + return retval;
> +}
> +
> +/**
> * bu21013_init_chip() - power on sequence for the bu21013 controller
> * @data: device structure pointer
> *
> @@ -449,6 +493,8 @@ static int __devinit bu21013_probe(struct i2c_client *client,
> return -EINVAL;
> }
>
> + pdata->irq = gpio_to_irq(pdata->touch_pin);
> +
No, you still can not do it since pdata is a const pointer. Does not
your compiler throw a warning here?
I already sent you a version of the patch that does not have these
issues, is there a particular reason why you needed to roll your own
instead of simply trying out the one I sent?
Thanks.
--
Dmitry
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