input/touchscreen/zylonite-wm97xx.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * zylonite-wm97xx.c  --  Zylonite Continuous Touch screen driver
28 #include <mach/regs-ac97.h>
93 	 * to buffer up samples otherwise we end up spinning polling  in wm97xx_acc_pen_down()
94 	 * for samples.  The controller can't have a suitably low  in wm97xx_acc_pen_down()
117 		dev_dbg(wm->dev, "Raw coordinates: x=%x, y=%x, p=%x\n",  in wm97xx_acc_pen_down()
120 		/* are samples valid */  in wm97xx_acc_pen_down()
124 			goto up;  in wm97xx_acc_pen_down()
128 		input_report_abs(wm->input_dev, ABS_X, x & 0xfff);  in wm97xx_acc_pen_down()
129 		input_report_abs(wm->input_dev, ABS_Y, y & 0xfff);  in wm97xx_acc_pen_down()
130 		input_report_abs(wm->input_dev, ABS_PRESSURE, p & 0xfff);  in wm97xx_acc_pen_down()
131 		input_report_key(wm->input_dev, BTN_TOUCH, (p != 0));  in wm97xx_acc_pen_down()
132 		input_sync(wm->input_dev);  in wm97xx_acc_pen_down()
135 up:  in wm97xx_acc_pen_down()
144 	if (wm->ac97 == NULL)  in wm97xx_acc_startup()
145 		return -ENODEV;  in wm97xx_acc_startup()
149 		if (wm->id != cinfo[idx].id)  in wm97xx_acc_startup()
155 	wm->acc_rate = cinfo[sp_idx].code;  in wm97xx_acc_startup()
156 	wm->acc_slot = ac97_touch_slot;  in wm97xx_acc_startup()
157 	dev_info(wm->dev,  in wm97xx_acc_startup()
158 		 "zylonite accelerated touchscreen driver, %d samples/sec\n",  in wm97xx_acc_startup()
167 		enable_irq(wm->pen_irq);  in wm97xx_irq_enable()
169 		disable_irq_nosync(wm->pen_irq);  in wm97xx_irq_enable()
191 	wm->pen_irq = gpio_to_irq(gpio_touch_irq);  in zylonite_wm97xx_probe()
192 	irq_set_irq_type(wm->pen_irq, IRQ_TYPE_EDGE_BOTH);  in zylonite_wm97xx_probe()
219 		.name	= "wm97xx-touch",