47 static short read_state(struct kp_data *lp)  in read_state()  argument
51 	i2c_smbus_write_byte(lp->client, 240);  in read_state()
52 	x = 0xF & (~(i2c_smbus_read_byte(lp->client) >> 4));  in read_state()
54 	i2c_smbus_write_byte(lp->client, 15);  in read_state()
55 	y = 0xF & (~i2c_smbus_read_byte(lp->client));  in read_state()
67 	struct kp_data *lp = dev_id;  in pcf8574_kp_irq_handler()  local
68 	unsigned char nextstate = read_state(lp);  in pcf8574_kp_irq_handler()
70 	if (lp->laststate != nextstate) {  in pcf8574_kp_irq_handler()
71 		int key_down = nextstate < ARRAY_SIZE(lp->btncode);  in pcf8574_kp_irq_handler()
73 			lp->btncode[nextstate] : lp->btncode[lp->laststate];  in pcf8574_kp_irq_handler()
75 		input_report_key(lp->idev, keycode, key_down);  in pcf8574_kp_irq_handler()
76 		input_sync(lp->idev);  in pcf8574_kp_irq_handler()
78 		lp->laststate = nextstate;  in pcf8574_kp_irq_handler()
88 	struct kp_data *lp;  in pcf8574_kp_probe()  local
95 	lp = kzalloc(sizeof(*lp), GFP_KERNEL);  in pcf8574_kp_probe()
96 	if (!lp)  in pcf8574_kp_probe()
106 	lp->idev = idev;  in pcf8574_kp_probe()
107 	lp->client = client;  in pcf8574_kp_probe()
110 	idev->keycode = lp->btncode;  in pcf8574_kp_probe()
111 	idev->keycodesize = sizeof(lp->btncode[0]);  in pcf8574_kp_probe()
112 	idev->keycodemax = ARRAY_SIZE(lp->btncode);  in pcf8574_kp_probe()
115 		if (lp->btncode[i] <= KEY_MAX) {  in pcf8574_kp_probe()
116 			lp->btncode[i] = pcf8574_kp_btncode[i];  in pcf8574_kp_probe()
117 			__set_bit(lp->btncode[i], idev->keybit);  in pcf8574_kp_probe()
122 	sprintf(lp->name, DRV_NAME);  in pcf8574_kp_probe()
123 	sprintf(lp->phys, "kp_data/input0");  in pcf8574_kp_probe()
125 	idev->name = lp->name;  in pcf8574_kp_probe()
126 	idev->phys = lp->phys;  in pcf8574_kp_probe()
132 	lp->laststate = read_state(lp);  in pcf8574_kp_probe()
136 				   DRV_NAME, lp);  in pcf8574_kp_probe()
148 	i2c_set_clientdata(client, lp);  in pcf8574_kp_probe()
152 	free_irq(client->irq, lp);  in pcf8574_kp_probe()
156 	kfree(lp);  in pcf8574_kp_probe()
163 	struct kp_data *lp = i2c_get_clientdata(client);  in pcf8574_kp_remove()  local
165 	free_irq(client->irq, lp);  in pcf8574_kp_remove()
167 	input_unregister_device(lp->idev);  in pcf8574_kp_remove()
168 	kfree(lp);  in pcf8574_kp_remove()