2  * HID over I2C Open Firmware Subclass
9  * "USB HID support for Linux":
12  *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
13  *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
14  *  Copyright (c) 2007-2008 Oliver Neukum
15  *  Copyright (c) 2006-2010 Jiri Kosina
25 #include <linux/hid.h>
26 #include <linux/i2c.h>
33 #include "i2c-hid.h"
48 	struct device *dev = &ihid_of->client->dev;  in i2c_hid_of_power_up()
51 	ret = regulator_bulk_enable(ARRAY_SIZE(ihid_of->supplies),  in i2c_hid_of_power_up()
52 				    ihid_of->supplies);  in i2c_hid_of_power_up()
58 	if (ihid_of->post_power_delay_ms)  in i2c_hid_of_power_up()
59 		msleep(ihid_of->post_power_delay_ms);  in i2c_hid_of_power_up()
61 	gpiod_set_value_cansleep(ihid_of->reset_gpio, 0);  in i2c_hid_of_power_up()
62 	if (ihid_of->post_reset_delay_ms)  in i2c_hid_of_power_up()
63 		msleep(ihid_of->post_reset_delay_ms);  in i2c_hid_of_power_up()
72 	gpiod_set_value_cansleep(ihid_of->reset_gpio, 1);  in i2c_hid_of_power_down()
73 	regulator_bulk_disable(ARRAY_SIZE(ihid_of->supplies),  in i2c_hid_of_power_down()
74 			       ihid_of->supplies);  in i2c_hid_of_power_down()
79 	struct device *dev = &client->dev;  in i2c_hid_of_probe()
88 		return -ENOMEM;  in i2c_hid_of_probe()
90 	ihid_of->client = client;  in i2c_hid_of_probe()
91 	ihid_of->ops.power_up = i2c_hid_of_power_up;  in i2c_hid_of_probe()
92 	ihid_of->ops.power_down = i2c_hid_of_power_down;  in i2c_hid_of_probe()
94 	ret = device_property_read_u32(dev, "hid-descr-addr", &val);  in i2c_hid_of_probe()
96 		dev_err(dev, "HID register address not provided\n");  in i2c_hid_of_probe()
97 		return -ENODEV;  in i2c_hid_of_probe()
100 		dev_err(dev, "Bad HID register address: 0x%08x\n", val);  in i2c_hid_of_probe()
101 		return -EINVAL;  in i2c_hid_of_probe()
105 	if (!device_property_read_u32(dev, "post-power-on-delay-ms", &val))  in i2c_hid_of_probe()
106 		ihid_of->post_power_delay_ms = val;  in i2c_hid_of_probe()
109 	 * Note this is a kernel internal device-property set by x86 platform code,  in i2c_hid_of_probe()
113 	if (!device_property_read_u32(dev, "post-reset-deassert-delay-ms", &val))  in i2c_hid_of_probe()
114 		ihid_of->post_reset_delay_ms = val;  in i2c_hid_of_probe()
117 	ihid_of->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);  in i2c_hid_of_probe()
118 	if (IS_ERR(ihid_of->reset_gpio))  in i2c_hid_of_probe()
119 		return PTR_ERR(ihid_of->reset_gpio);  in i2c_hid_of_probe()
121 	ihid_of->supplies[0].supply = "vdd";  in i2c_hid_of_probe()
122 	ihid_of->supplies[1].supply = "vddl";  in i2c_hid_of_probe()
123 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ihid_of->supplies),  in i2c_hid_of_probe()
124 				      ihid_of->supplies);  in i2c_hid_of_probe()
128 	if (device_property_read_bool(dev, "touchscreen-inverted-x"))  in i2c_hid_of_probe()
131 	if (device_property_read_bool(dev, "touchscreen-inverted-y"))  in i2c_hid_of_probe()
134 	return i2c_hid_core_probe(client, &ihid_of->ops,  in i2c_hid_of_probe()
140 	{ .compatible = "hid-over-i2c" },
147 	{ "hid", 0 },
148 	{ "hid-over-i2c", 0 },
151 MODULE_DEVICE_TABLE(i2c, i2c_hid_of_id_table);
169 MODULE_DESCRIPTION("HID over I2C OF driver");