diff options
| -rw-r--r-- | drivers/input/touchscreen/fusion_F0710A.c | 47 | ||||
| -rw-r--r-- | include/linux/input/fusion_F0710A.h | 20 |
2 files changed, 67 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/fusion_F0710A.c b/drivers/input/touchscreen/fusion_F0710A.c index 2cd2096c3b98..1546e6a18512 100644 --- a/drivers/input/touchscreen/fusion_F0710A.c +++ b/drivers/input/touchscreen/fusion_F0710A.c @@ -16,6 +16,7 @@ #include <linux/delay.h> #include <asm/irq.h> #include <linux/gpio.h> +#include <linux/input/fusion_F0710A.h> #include "fusion_F0710A.h" @@ -286,10 +287,52 @@ const static u8* g_ver_product[4] = { static int fusion_F0710A_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { + struct fusion_f0710a_init_data *pdata = i2c->dev.platform_data; int ret; u8 ver_product, ver_id; u32 version; + if (pdata == NULL) + { + dev_err(&i2c->dev, "No platform data for Fusion driver\n"); + return -ENODEV; + } + + /* Request pinmuxing, if necessary */ + if (pdata->pinmux_fusion_pins != NULL) + { + ret = pdata->pinmux_fusion_pins(); + if (ret < 0) { + dev_err(&i2c->dev, "muxing GPIOs failed\n"); + return -ENODEV; + } + } + + if ((gpio_request(pdata->gpio_int, "SO-DIMM 28 (Iris X16-38 Pen)") == 0) && + (gpio_direction_input(pdata->gpio_int) == 0)) { + gpio_export(pdata->gpio_int, 0); + } else { + printk(KERN_WARNING "Could not obtain GPIO for Fusion pen down\n"); + return -ENODEV; + } + + if ((gpio_request(pdata->gpio_reset, "SO-DIMM 30 (Iris X16-39 RST)") == 0) && + (gpio_direction_output(pdata->gpio_reset, 1) == 0)) { + + /* Generate a 0 => 1 edge explicitly... */ + gpio_set_value(pdata->gpio_reset, 0); + mdelay(10); + gpio_set_value(pdata->gpio_reset, 1); + + gpio_export(pdata->gpio_reset, 0); + } else { + printk(KERN_WARNING "Could not obtain GPIO for Fusion reset\n"); + return -ENODEV; + } + + /* Use Pen Down GPIO as sampling interrupt */ + i2c->irq = gpio_to_irq(pdata->gpio_int); + if(!i2c->irq) { dev_err(&i2c->dev, "fusion_F0710A irq < 0 \n"); @@ -412,6 +455,10 @@ static int fusion_F0710A_resume(struct i2c_client *i2c) static int fusion_F0710A_remove(struct i2c_client *i2c) { + struct fusion_f0710a_init_data *pdata = i2c->dev.platform_data; + + gpio_free(pdata->gpio_int); + gpio_free(pdata->gpio_reset); destroy_workqueue(fusion_F0710A.workq); free_irq(i2c->irq, &fusion_F0710A); input_unregister_device(fusion_F0710A.input); diff --git a/include/linux/input/fusion_F0710A.h b/include/linux/input/fusion_F0710A.h new file mode 100644 index 000000000000..7d152cbdd06e --- /dev/null +++ b/include/linux/input/fusion_F0710A.h @@ -0,0 +1,20 @@ +/* linux/input/fusion_F0710A.h + * + * Platform data for Fusion F0710A driver + * + * Copyright (c) 2013 Toradex AG (stefan.agner@toradex.ch) + * + * For licencing details see kernel-base/COPYING + */ + +#ifndef __LINUX_I2C_FUSION_F0710A_H +#define __LINUX_I2C_FUSION_F0710A_H + +/* Board specific touch screen initial values */ +struct fusion_f0710a_init_data { + int (*pinmux_fusion_pins)(void); + int gpio_int; + int gpio_reset; +}; + +#endif /* __LINUX_I2C_FUSION_F0710A_H */ |