1 // SPDX-License-Identifier: GPL-2.0-or-later
63 	u32 deb_clks;		/* Debounce clocks (based on 32KHz clock) */
64 	u32 scan_delay;		/* Scan delay (based on 32KHz clock) */
74 	struct input_dev *input = kscandat->input;  in lpc32xx_mod_states()
78 	key = readl(LPC32XX_KS_DATA(kscandat->kscan_base, col));  in lpc32xx_mod_states()
79 	changed = key ^ kscandat->lastkeystates[col];  in lpc32xx_mod_states()
80 	kscandat->lastkeystates[col] = key;  in lpc32xx_mod_states()
86 						    kscandat->row_shift);  in lpc32xx_mod_states()
87 			keycode = kscandat->keymap[scancode];  in lpc32xx_mod_states()
99 	for (i = 0; i < kscandat->matrix_sz; i++)  in lpc32xx_kscan_irq()
102 	writel(1, LPC32XX_KS_IRQ(kscandat->kscan_base));  in lpc32xx_kscan_irq()
104 	input_sync(kscandat->input);  in lpc32xx_kscan_irq()
114 	error = clk_prepare_enable(kscandat->clk);  in lpc32xx_kscan_open()
118 	writel(1, LPC32XX_KS_IRQ(kscandat->kscan_base));  in lpc32xx_kscan_open()
127 	writel(1, LPC32XX_KS_IRQ(kscandat->kscan_base));  in lpc32xx_kscan_close()
128 	clk_disable_unprepare(kscandat->clk);  in lpc32xx_kscan_close()
134 	struct device_node *np = dev->of_node;  in lpc32xx_parse_dt()
143 		return -EINVAL;  in lpc32xx_parse_dt()
146 	kscandat->matrix_sz = rows;  in lpc32xx_parse_dt()
147 	kscandat->row_shift = get_count_order(columns);  in lpc32xx_parse_dt()
149 	of_property_read_u32(np, "nxp,debounce-delay-ms", &kscandat->deb_clks);  in lpc32xx_parse_dt()
150 	of_property_read_u32(np, "nxp,scan-delay-ms", &kscandat->scan_delay);  in lpc32xx_parse_dt()
151 	if (!kscandat->deb_clks || !kscandat->scan_delay) {  in lpc32xx_parse_dt()
152 		dev_err(dev, "debounce or scan delay not specified\n");  in lpc32xx_parse_dt()
153 		return -EINVAL;  in lpc32xx_parse_dt()
169 		return -EINVAL;  in lpc32xx_kscan_probe()
171 	kscandat = devm_kzalloc(&pdev->dev, sizeof(*kscandat),  in lpc32xx_kscan_probe()
174 		return -ENOMEM;  in lpc32xx_kscan_probe()
176 	error = lpc32xx_parse_dt(&pdev->dev, kscandat);  in lpc32xx_kscan_probe()
178 		dev_err(&pdev->dev, "failed to parse device tree\n");  in lpc32xx_kscan_probe()
182 	keymap_size = sizeof(kscandat->keymap[0]) *  in lpc32xx_kscan_probe()
183 				(kscandat->matrix_sz << kscandat->row_shift);  in lpc32xx_kscan_probe()
184 	kscandat->keymap = devm_kzalloc(&pdev->dev, keymap_size, GFP_KERNEL);  in lpc32xx_kscan_probe()
185 	if (!kscandat->keymap)  in lpc32xx_kscan_probe()
186 		return -ENOMEM;  in lpc32xx_kscan_probe()
188 	kscandat->input = input = devm_input_allocate_device(&pdev->dev);  in lpc32xx_kscan_probe()
190 		dev_err(&pdev->dev, "failed to allocate input device\n");  in lpc32xx_kscan_probe()
191 		return -ENOMEM;  in lpc32xx_kscan_probe()
195 	input->name		= pdev->name;  in lpc32xx_kscan_probe()
196 	input->phys		= "lpc32xx/input0";  in lpc32xx_kscan_probe()
197 	input->id.vendor	= 0x0001;  in lpc32xx_kscan_probe()
198 	input->id.product	= 0x0001;  in lpc32xx_kscan_probe()
199 	input->id.version	= 0x0100;  in lpc32xx_kscan_probe()
200 	input->open		= lpc32xx_kscan_open;  in lpc32xx_kscan_probe()
201 	input->close		= lpc32xx_kscan_close;  in lpc32xx_kscan_probe()
202 	input->dev.parent	= &pdev->dev;  in lpc32xx_kscan_probe()
207 					   kscandat->matrix_sz,  in lpc32xx_kscan_probe()
208 					   kscandat->matrix_sz,  in lpc32xx_kscan_probe()
209 					   kscandat->keymap, kscandat->input);  in lpc32xx_kscan_probe()
211 		dev_err(&pdev->dev, "failed to build keymap\n");  in lpc32xx_kscan_probe()
215 	input_set_drvdata(kscandat->input, kscandat);  in lpc32xx_kscan_probe()
217 	kscandat->kscan_base = devm_platform_ioremap_resource(pdev, 0);  in lpc32xx_kscan_probe()
218 	if (IS_ERR(kscandat->kscan_base))  in lpc32xx_kscan_probe()
219 		return PTR_ERR(kscandat->kscan_base);  in lpc32xx_kscan_probe()
222 	kscandat->clk = devm_clk_get(&pdev->dev, NULL);  in lpc32xx_kscan_probe()
223 	if (IS_ERR(kscandat->clk)) {  in lpc32xx_kscan_probe()
224 		dev_err(&pdev->dev, "failed to get clock\n");  in lpc32xx_kscan_probe()
225 		return PTR_ERR(kscandat->clk);  in lpc32xx_kscan_probe()
229 	error = clk_prepare_enable(kscandat->clk);  in lpc32xx_kscan_probe()
233 	writel(kscandat->deb_clks, LPC32XX_KS_DEB(kscandat->kscan_base));  in lpc32xx_kscan_probe()
234 	writel(kscandat->scan_delay, LPC32XX_KS_SCAN_CTL(kscandat->kscan_base));  in lpc32xx_kscan_probe()
236 	       LPC32XX_KS_FAST_TST(kscandat->kscan_base));  in lpc32xx_kscan_probe()
237 	writel(kscandat->matrix_sz,  in lpc32xx_kscan_probe()
238 	       LPC32XX_KS_MATRIX_DIM(kscandat->kscan_base));  in lpc32xx_kscan_probe()
239 	writel(1, LPC32XX_KS_IRQ(kscandat->kscan_base));  in lpc32xx_kscan_probe()
240 	clk_disable_unprepare(kscandat->clk);  in lpc32xx_kscan_probe()
242 	error = devm_request_irq(&pdev->dev, irq, lpc32xx_kscan_irq, 0,  in lpc32xx_kscan_probe()
243 				 pdev->name, kscandat);  in lpc32xx_kscan_probe()
245 		dev_err(&pdev->dev, "failed to request irq\n");  in lpc32xx_kscan_probe()
249 	error = input_register_device(kscandat->input);  in lpc32xx_kscan_probe()
251 		dev_err(&pdev->dev, "failed to register input device\n");  in lpc32xx_kscan_probe()
264 	struct input_dev *input = kscandat->input;  in lpc32xx_kscan_suspend()
266 	mutex_lock(&input->mutex);  in lpc32xx_kscan_suspend()
270 		writel(1, LPC32XX_KS_IRQ(kscandat->kscan_base));  in lpc32xx_kscan_suspend()
271 		clk_disable_unprepare(kscandat->clk);  in lpc32xx_kscan_suspend()
274 	mutex_unlock(&input->mutex);  in lpc32xx_kscan_suspend()
282 	struct input_dev *input = kscandat->input;  in lpc32xx_kscan_resume()
285 	mutex_lock(&input->mutex);  in lpc32xx_kscan_resume()
289 		retval = clk_prepare_enable(kscandat->clk);  in lpc32xx_kscan_resume()
291 			writel(1, LPC32XX_KS_IRQ(kscandat->kscan_base));  in lpc32xx_kscan_resume()
294 	mutex_unlock(&input->mutex);  in lpc32xx_kscan_resume()
302 	{ .compatible = "nxp,lpc3220-key" },